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+1 (888) 385-68281,438 reviews
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$1374-796 Kuhio Highway, Kapaa, 96746, Hawaii, United States
1,438 reviews
1/55
Free parking
Restaurant
Beachfront
Outdoor swimming pool
Free wifi
Beach
Air conditioning
Bar
Welcome to The ISO by Castle, your ideal Hawaiian getaway nestled in the charming town of Kapa‘a! This delightful 4-star hotel is more than just a place to sleep; it’s a vibrant setting where relaxation meets adventure. Located just 1.5 kilometers from the city center, you’re perfectly positioned to explore local attractions while enjoying the serenity of beachfront living. With prices starting from only $137, you can experience the beauty of Hawaii without breaking the bank.
Every stay at The ISO by Castle comes with a buffet of amenities tailor-made for your comfort and enjoyment. Enjoy breathtaking ocean views from your balcony as you sip on a tropical drink from the bar, or take a leisurely stroll to the beach just steps away. Feeling adventurous? Dive into the outdoor swimming pool or whip up a feast in your own kitchenette, stocked with kitchenware for all your culinary needs. With free parking, free Wi-Fi, and non-smoking rooms, this hotel has all you need to unwind and escape from everyday life.
With over 1,183 reviews, travelers rave about their experiences, highlighting the fantastic service and stunning surroundings. Whether you're lounging on the patio, enjoying free toiletries, basking in the sun, or savoring a meal at the on-site restaurant, The ISO by Castle is not just a place to stay—it's a slice of paradise waiting for you to explore. Plan your unforgettable Hawaiian getaway today!
At The ISO by Castle, every corner brims with charm, ensuring your Hawaiian vacation is as lively as it is relaxing! Dive into the refreshing outdoor pool, where you can splash under the golden sun or lounge poolside with your favorite book. For those looking to satisfy their appetites without straying far from paradise, the on-site Bull Shed restaurant promises a delightful dining experience with its family-friendly vibe and a menu packed with tasty American fare. Whether you're sharing laughs over a meal or enjoying a romantic dinner under the stars, the ambiance here perfectly complements the picturesque surroundings.
When it comes to lodging, The ISO by Castle doesn't cut corners. The diverse range of room types means that you and your travel companions can find the perfect fit for your needs. From spacious suites designed to accommodate the whole gang to cozy oceanview rooms where you can soak in the stunning sunsets, your comfort is top priority. With options that cater to up to 10 adults, everyone’s invited to the party! After a day filled with adventures, return to your sanctuary, complete with modern amenities and beautiful views to enjoy that classic Hawaiian breeze.
And let’s not forget about the friendly staff! The ISO by Castle prides itself on delivering service that feels like a warm hug—always ready to share tips about local hotspots or help with your plans for the day. From leisurely beach days to heart-pounding adventures like snorkeling and hiking, Kapa‘a offers an endless playground for exploration. Enhance your experience with unforgettable memories and Instagram-worthy moments that will last a lifetime! The ISO by Castle is not just a destination; it’s where your Hawaiian dreams come alive.
Planning a wedding, corporate event, or need many rooms? Get a personalized quote with discounted rates for your group.
Closest airports
Lihue Airport
6miFree parking
Restaurant
Beachfront
Outdoor swimming pool
Free wifi
Beach
Air conditioning
Bar
Parking On Site
Ocean view
Kitchen
Non-smoking rooms
Kitchenette
Patio
Kitchenware
Free toiletries
Balcony
Show 6 photos
Deluxe, 2 Double/King, Ocean View
2 Double Beds
1 King Size Bed
Balcony
Free wifi
Flat-screen TV
Refrigerator
x4
+
x3
More details
Soak in gorgeous Pacific scenery from the private lanai of these recently upgraded accommodations. Comfort & style prevail through stylish island decor, WiFi, flat screen, air conditioning, ceiling fan, coffeemaker, and refrigerator. With prime views of Kauai’s eastern shore, these rooms appeal with modern island decor, natural wood tones and a cheerful color palette. Includes 1 King or 2 Double beds. Located on the 2nd Floor. Accessible by stairs only.
Show 6 photos
Room - 2 Double/King, Oceanfront
2 Double Beds
1 King Size Bed
Balcony
Free wifi
Flat-screen TV
Refrigerator
x3
+
More details
Enjoy the Pacific views from your private lanai in these newly upgraded guest rooms with chic island decor. Conveniences include WiFi, flat screen, air conditioning, ceiling fan, and refrigerator. With views of the magnificent Pacific ocean from your private lanai, you can’t go more “oceanfront” than this. These rooms feature contemporary island decor & natural wood tones balanced by a cheerful color palette. Includes 1 king bed or 2 double beds. Located on 1st, 2nd, or 3rd floor. Upper floors accessible by stairs only.
Show 11 photos
House Suite, Beach View
1 King Size Bed
1 Sofa Bed
635 sqft
Ocean view
Kitchen
Private Bathroom
Balcony
+
More details
Step into our spacious Beach House Suite, where you can enjoy stunning ocean views from your private balcony, cook delicious meals in the fully-equipped kitchen, and relax in utmost comfort in the king size bed or on the cozy sofa bed. With room for 4 adults and 3 children, this suite offers the perfect beachside retreat for the whole family.
Show 6 photos
1 Bedroom, Ocean View, Kitchenette
1 Sofa Bed
1 King Size Bed
290 sqft
Ocean view
Private Bathroom
Kitchenette
Kitchenware
x4
+
x3
More details
Enjoy breathtaking ocean views from your spacious suite with a kitchenette, suitable for both families and groups. A comfortable king size bed and a sofa bed provide accommodation for up to 4 adults and 3 children, ensuring a memorable stay.
Show 10 photos
Room - 2 Double, Oceanfront
2 Double Beds
1 Queen Size Bed
290 sqft
Ocean view
Private Bathroom
Flat-screen TV
Refrigerator
x3
+
More details
Experience the ultimate seaside retreat in our newly renovated Ocean Front Studio, featuring breathtaking ocean views, a private bathroom, and comfortable beds for a memorable stay for 2 adults and 1 child. Enjoy modern amenities such as a flat-screen TV, refrigerator, air conditioning, and more for a refreshing and rejuvenating beachside getaway.
Show 6 photos
Room - 2 Double, Ocean View
2 Double Beds
1 Queen Size Bed
290 sqft
Ocean view
Private Bathroom
Flat-screen TV
Refrigerator
x4
+
x3
More details
Experience the breathtaking ocean view from our newly renovated studio, complete with double and queen size beds to accommodate 2 adults and 1 child. Enjoy the convenience of a private bathroom, flat-screen TV, refrigerator, and air conditioning, making your stay truly comfortable and memorable.
Show 9 photos
Deluxe, Queen/2 Double, Ocean View
1 Sofa Bed
1 Queen Size Bed
2 Double Beds
290 sqft
Ocean view
Private Bathroom
Flat-screen TV
Refrigerator
x3
+
x3
More details
Enjoy breathtaking ocean views from this spacious Deluxe Studio, perfect for families with its ability to accommodate up to 3 adults and 3 children. Unwind in comfort with a private bathroom, flat-screen TV, and air conditioning, and take in the scenic beauty of the ocean right from your room.
Show 5 photos
Room - 2 Double/King, Ocean View
2 Double Beds
1 King Size Bed
Balcony
Free wifi
Flat-screen TV
Refrigerator
x3
+
More details
Embrace stylish comfort with gorgeous views of Kauai’s eastern shore. These refreshed 290sf rooms feature modern island decor, WiFi, air conditioning, ceiling fan, private lanai, refrigerator, coffeemaker, flat screen. Experience Kauai’s relaxing vibe in these rooms with epic eastern shore vistas from the private lanai. Includes 1 King bed or 2 Double beds. Located on 1st, 2nd, or 3rd floor. Upper floors accessible by stairs only.
Show 3 photos
Room - 2 Double/King, Partial Ocean View
2 Double Beds
1 King Size Bed
Balcony
Free wifi
Flat-screen TV
Tea/Coffee maker
x4
+
x3
More details
Embrace stylish comfort with gorgeous views of Kauai’s eastern shore. These refreshed 290sf rooms feature modern island decor, WiFi, air conditioning, ceiling fan, private lanai, refrigerator, coffeemaker, flat screen. Experience Kauai’s relaxing vibe in these rooms with epic eastern shore vistas from the private lanai. Includes 1 King bed or 2 Double beds. Located on 1st, 2nd, or 3rd floor. Upper floors accessible by stairs only.
Show 2 photos
Premium, 2 Double/King, Pacific View, Oceanfront
2 Double Beds
1 King Size Bed
Balcony
Free wifi
Flat-screen TV
Tea/Coffee maker
x4
+
x3
More details
Enjoy the Pacific views from your private lanai in these newly upgraded guest rooms with chic island decor. Conveniences include WiFi, flat screen, air conditioning, ceiling fan, and refrigerator. With views of the magnificent Pacific ocean from your private lanai, you can’t go more “oceanfront” than this. These rooms feature contemporary island decor & natural wood tones balanced by a cheerful color palette. Includes 1 king bed or 2 double beds. Located on 1st, 2nd, or 3rd floor. Upper floors accessible by stairs only.
Show 6 photos
1 Bedroom, 2 Bed, Ocean View, Kitchenette
290 sqft
Kitchenette
Flat-screen TV
Refrigerator
Tea/Coffee maker
+
More details
The air-conditioned suite features 1 bedroom and 1 bathroom with a shower and a hairdryer. The suite's kitchenette, which has a refrigerator and kitchenware, is available for cooking and storing food. The suite provides a tea and coffee maker, a seating area, a dining area, a flat-screen TV with cable channels, as well as sea views. The unit offers 2 beds. The unit is located on the second floor and is accessible by stairs only.
Show 4 photos
Studio, Ocean View
1 Double Bed
1 Sofa Bed
Microwave
x5
+
x3
More details
Studio Ocean View includes a double bed 131-150 width plus a sofa bed.
8.1
1,438 reviewsCategories of assessments
Cleanliness
Comfort
Location
Facilities
Staff
Value for money
WiFi quality
Featured reviews:
Pamela
9.1
June 2025
I loved the location!! It was so close to everything, including the airport. The grounds & ocean views were beautiful!! Also, the breakfast was delicious with a good variety.
What I didn't like was the booking company I booked my reservation with....Booking.com. They misrepresented the rooms & info for the ISO by Castle. I booked & paid for a room with two queen sized beds with an ocean view right outside our room & sliding glass door, with the online photo showing the ocean view just a few steps away. They were very misleading & when we checked in, we were told by Rihana that the property didn't even have rooms with queen sized beds.....only rooms with double beds or a king size bed!! Something needs to be done about Booking.com being untruthful & misleading about their reservations!!
Smon
8.2
July 2024
Please remember the following description of our hotel experience: We had an oceanfront view from the second floor, facing the pool, and enjoyed some privacy thanks to the nearby trees. The room was clean and comfortable. The hotel's location was convenient for heading north, south, and to the west shore, and we had many activities scheduled. The hotel offers a fantastic sunrise view but could use nicer and more comfortable beach chairs. Although the beach in front of the hotel may not be the most beautiful, it was good enough for a morning or evening walk. There was plenty of parking available, and the pool was nice, clean, and had enough chairs. There was also a small fireplace where we could hang out after dinner. The breakfast was grab-and-go style, which was fine for us. Bonus is the yo Ga class at 7 AM, the instructor she is super sweet and great!
The room has so much light from electronics and AC, but we use a tower to cover it all.
Mattia
9.1
June 2024
The room had a fantastic view to the ocean and we could admire the sunrise even laying in the bad! Very appreciated the included breakfast that we could have under the amazing sun in the inner courtyard of the hotel. We enjoyed also the included Yoga practice open air every morning: the only sound you could ear is the ocean!
Was not clear that the room cleaning is under explicit request.
Carol
9.1
April 2025
We love the relatively small size of the hotel. The ocean views are spectacular. Although it is convenient to the Coconut Marketplace and the shopping center across the street, the hotel is bordered by an open field and a canal on either side. The convenient and scenic walking path does not extend beachside of the hotel which prevents a constant parade of walkers and bikers in front of the hotel. The hotel is peaceful and private. The Bull Shed is attached to the hotel but the only noise from the restaurant is the lovely live music.The vibe at the ISO is laid back and mellow. This is our second time there and are eager to return. We also enjoy the yogurt, cereal and fresh pineapple for breakfast. It is perfect for us.The fire pit, chairs and picnic tables are spaced out nicely providing a relaxing place to view the ocean from.
I wish there was a couple of stands for our suitcases in the room and a microwave. A couple of lounge chair cushions need attention due to being very beat up.
Rebecca
9.1
April 2024
This hotel is great value (taking into account how expensive Hawaii is generally). It has a lovely relaxed feel and beautiful view from the room with sea breezes. I enjoyed this hotel very much. It also has a Starbucks and supermarket 5 minutes walk away which is very convenient. There’s a morning yoga class which was great too.
Oskar
9.1
April 2025
The location is absolutely great for exploring the entire island, being situated right in the middle. The staff were wonderful, particularly the very friendly front desk team. Parking was ample and convenient, located right in front. The garden and pool area were well-kept and featured a cozy fireplace. The pool itself was very clean. The provided breakfast was decent, though coffee was missing from the main area (fortunately, there was a coffee machine in the room). We also enjoyed great views from the rooms. Plus, they offer free bike rental, which is a fantastic bonus!
Despite the air conditioning, the air in the room felt a bit wet and moist. However, I chose to sleep with the door open to enjoy the fantastic sound of the breaking waves afterwards. Additionally, the TV wasn't working for me, but honestly, being in Hawaii, I didn't really need it anyway.
Carmen
8.2
December 2022
Very nice hotel in a comfortable location, easily accessible with the car and with some options within a walking distance or by bike (available in the hotel to rent). The room was fully equipped, including a fridge & coffee machine. The hotel provides refillable bottle & a purified water fountain in the hall. Amenities and enough clean towels were provided for our 3 nights stays, if more needed you can ask the reception. However worth noticing they don’t have daily cleaning service, but rely on DIY services providing you with the resources to ensure a clean room & nice stay. It was surprising but we actually appreciated it as a way to reduce waste & understandable with the min staff they have. The Grab & Go breakfast is a nice concept that allowed us to enjoy beautiful sunrises from the room or the beach.
The only BUT was the staff, they were not as welcoming or helpful as most Hawaiians. We asked for recommendation for hikes, place to visit & food trucks… and they were not able to help but gave us the standard coupon magazine of the island. The service with not aloha spirit, in this sense was disappointing
Christopher
8.2
March 2025
The location is great. Right on the water. I'm glad they've help the property for so long and haven't sold it to a bigger developer or something like that. The room and lānai were very clean and the AC worked great although we didn't use it much. The ocean breeze was enough for us. You'd be hard pressed to find a better view for the money.
Not having access to the ice machine 24/7 slowed us down a bit when we were trying to head out early so we had to buy ice elsewhere. Breakfast needs to be earlier than 7 am. The water filling station needs to be replaced or scrubbed spotless. Pool area needs some serious attention.
Karlyn
9.1
April 2025
This was a wonderful property that felt like part of the community, surrounded by local businesses and using a responsible amount of land. We are so glad we stayed here instead of at a resort. Some favorites: 1. Free bike rental with helmets available! The hotel is in such a bikeable area with easy access to the coastal trail. 2. Breakfast was great--a nice variety for a free grab&go-- especially the fresh pineapple. 3. We loved the pool. We didn't do the sunrise yoga, but it was neat to see it every morning. 4. The ocean views and access were excellent, and the outdoor lighting was bright enough to feel safe but dim enough that you could see stars and the ocean at night-- unlike the resorts just south of us. We loved our private balcony. 5. While there aren't laundry facilities on the premises, there's a great new laundromat just across the street. This was easy and convenient. 6. The free water bottles and water were very helpful for staying hydrated on active Kauai days of hiking, biking, and kayaking. 7. Customer Service was consistently great.
Nothing
Barbara
10
July 2025
The location was excellent! I had a late flight from the mainland and wanted to stay somewhat near the airport, in an area I was familiar with. I greatly appreciated the friendly staff being there to check me in, despite the late hour. The lobby and property was immaculate (and cute! Retro Hawaiian!). They accommodated my request for a ground floor location and it overlooked the pool, with the ocean beyond! Really loved the grab and go breakfast in the morning! That was unexpected and a nice asset! Also loved the proximity to the Bull Shed restaurant! Right on property…so great and safe for a solo traveler, as I had a mai tai nightly and enjoyed the live Hawaiian music. Plenty of parking and the location is right across from McDonald’s, near Snorkel Bob’s and a Safeway! Also you can walk the oceanfront strand (walkway) all the way down the beach.
Attractions
Lihue
4.1miWailua Falls
5.2miKauai Museum
6.7miMenehune Fish Pond
8.5miMt. Waialeale
11.3miDaniel K. Inouye Kilauea Point Lighthouse
12.9miMakauwahi Cave Reserve
13.5miHanalei Bay
15.4miAnini Beach
17.3miMakua Beach (Tunnels Beach)
19miLimahuli Garden and Preserve
19.6miNa Pali Coast
21.7miPolihale State Park
23.9miWaimea Canyon
24.9miKoke'e State Park
24.9miAttractions
Lihue
4.1miWailua Falls
5.2miKauai Museum
6.7miMenehune Fish Pond
8.5miMt. Waialeale
11.3miDaniel K. Inouye Kilauea Point Lighthouse
12.9miMakauwahi Cave Reserve
13.5miHanalei Bay
15.4miAnini Beach
17.3miMakua Beach (Tunnels Beach)
19miLimahuli Garden and Preserve
19.6miNa Pali Coast
21.7miPolihale State Park
23.9miWaimea Canyon
24.9miKoke'e State Park
24.9miAirports
Lihue Airport
6miBull Shed
Cuisines
Ambiances
Location
Free parking
Restaurant
Beachfront
Outdoor swimming pool
Free wifi
Beach
Air conditioning
Bar
Parking On Site
Ocean view
Kitchen
Non-smoking rooms
Kitchenette
Patio
Kitchenware
Free toiletries
Balcony
Accessibility
Upper floors accessible by stairs only
Activities
Beach
Bicycle rental
Bathroom
Free toiletries
Hairdryer
Private Bathroom
Shower
Toilet
Toilet paper
Towels
Bedroom
Linens
Food & Drink
Bar
Restaurant
Tea/Coffee maker
General
Air conditioning
Non-smoking rooms
Smoke-free property
Internet
Free wifi
Kitchen
Dining table
Kitchen
Kitchenette
Kitchenware
Oven
Refrigerator
Stovetop
Toaster
Living Area
Dining area
Sitting area
Media & Technology
Cable channels
Flat-screen TV
Telephone
TV
Outdoors
Balcony
Beachfront
Patio
Parking
Free parking
Parking On Site
Room Amenities
Fan
Iron
Safety & security
Key card access
Spa
Outdoor swimming pool
Yoga classes
View
Ocean view
From 15:00
Until 21:00
Guests are required to show a photo identification and credit card upon check-in
Until 11:00
Pets are not allowed.
WiFi is available in public areas and is free of charge.
The minimum age for check-in is 18
Come and go whenever you want
Free public parking is available on site (reservation is not needed).
Reservations
Call us for our best daily rates
+1 (888) 385-6828Child policies
Children of all ages are welcome.
Children 18 and above will be charged as adults at this property.
To see correct prices and occupancy info, add the number and ages of children in your group to your search.
Crib and extra bed policies
No capacity for extra beds or cribs.
American Express,
Discover,
Mastercard,
Visa
This property does not accept cash.
What's the check-in and check-out schedule at The ISO by Castle?
The standard timings at The ISO by Castle are as follows: Check-in from 03:00 PM to 09:00 PM and check-out no later than 11:00 AM.
Can guests park for free at The ISO by Castle?
Yes, there is parking available at The ISO hotel, and it is free of charge. The parking is located on-site and is open to the public. No reservation is required to use the parking facilities at the hotel.
What's the nightly rate at The ISO by Castle?
The base price for The ISO by Castle starts at $137. Do note, the cost might change depending on room preferences and dates. To see the actual prices, input your desired dates.
What types of rooms does The ISO by Castle offer?
The hotel offers a variety of rooms including One Bedroom Ocean View with Kitchenette, "Newly Renovated" Hotel Ocean Front, "Newly Renovated" Hotel Ocean View, and Deluxe Ocean View. The rooms range in occupancy from 2 to 4 adults and 1 to 3 children. All rooms are non-smoking and have a room size of 291 square feet. The bed configurations include sofa beds, king-size beds, queen-size beds, and double beds.
What activities does The ISO by Castle offer?
At The ISO hotel, guests can enjoy their time by taking advantage of the leisure amenities provided. They can relax by the outdoor swimming pool or unwind at the beachfront. For those who want to stay active, there is a bicycle rental available to explore the surroundings. Additionally, yoga classes are offered for guests who would like to maintain their fitness routine during their stay.
When it comes to dining, guests can indulge in a variety of cuisines at the on-site restaurant called Bull Shed. With its family-friendly, traditional, modern, and romantic ambiances, there is a suitable atmosphere for every occasion and preference. The restaurant specializes in American cuisine, offering guests a diverse menu of delicious dishes to choose from.
Overall, guests at The ISO hotel can enjoy a combination of relaxation and recreational activities, while also experiencing delightful dining options.
Can guests use a pool at The ISO by Castle?
The ISO hotel has an outdoor pool.
Does The ISO by Castle have on-site restaurants?
Yes, The ISO hotel has a restaurant on-site called Bull Shed. It offers a variety of cuisines with an ambiance that ranges from family-friendly to romantic. The restaurant provides a mix of traditional and modern American dishes.
What methods of payment does The ISO by Castle accept?
The ISO accepts payments through American Express, Visa, Discover, and Mastercard. However, cash payments are not accepted.
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+1 (888) 385-6828