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Hotel The ISO by Castle (formerly The ISO)

4-796 Kuhio Highway, Kapaa, Hawaii (Hi), HI 96746 , USA (show map)

8.1

Very good

1543 verified reviews

1/40

See rooms & prices »

Hotel Overview

Located across from Waipouli Town Center, The ISO by Castle is beachfront Kapaa studios feature free WiFi, an oceanfront swimming pool and an on-site restaurant.
A private Hawaiian-style patio is offered in each studio apartment. Coffee-making facilities are also available.
The Bullshed Restaurant, open daily for dinner, features oceanfront dining. Steak and seafood specialties are served in a relaxed, family-style setting.
A snorkeling beach and putting green, tennis and shuffleboard courts are located on site. Free parking is provided.
Kapaa Beach Park is 1 mile away. Lihue Airport is 15 minutes’ drive away from The ISO by Castle.

Formerly The ISO

Before September 2024 The ISO by Castle was known as The ISO

Before March 2019 The ISO by Castle was known as Castle Mokihana

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Hotel prices fluctuate. Book now, we will check prices each day for you and then let you know how to re-book if an even better price becomes available.

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Hotel Ocean View - enter dates to see room photos

Providing free toiletries, this studio includes a private bathroom with a shower and a hairdryer. This studio features air conditioning, a tea and coffee maker, a flat-screen TV with cable channels and sea views. The rooms are located on floors from first to third and are accessible by stairs only.

Hotel Ocean Front - enter dates to see room photos

Offering free toiletries, this studio includes a private bathroom with a shower and a hairdryer. This studio has air conditioning, a tea and coffee maker, a flat-screen TV with cable channels and sea views. The rooms are located on floors from first to third and are accessible by stairs only.

Deluxe Ocean View - enter dates to see room photos

Offering free toiletries, this studio includes a private bathroom with a shower and a hairdryer. This studio features air conditioning, a tea and coffee maker, a flat-screen TV with cable channels and sea views. The unit is located on the second floor and is accessible by stairs only.

One Bedroom Ocean View with Kitchenette - enter dates to see room photos

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.

The Beach House Suite - enter dates to see room photos

This suite comes with 1 living room, 1 separate bedroom and 1 bathroom with a shower and free toiletries. Meals can be prepared in the well-fitted kitchen, which features a stovetop, a refrigerator, a dishwasher and kitchenware. Boasting a balcony with sea views, this suite also features air conditioning and a flat-screen TV with cable channels. The unit has 2 beds. The unit is located on the second floor and is accessible by stairs only.

Studio with Pool View - enter dates to see room photos

The unit offers 1 bed.

Studio with Ocean View - enter dates to see room photos

The unit has 1 bed.

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Facilities of The ISO by Castle

General
Free parking, On-site parking, Parking

Services
Free WiFi, Internet services, WiFi

Food & Drink
Bar, Restaurant

Pools and wellness
Beachfront, Outdoor pool

Miscellaneous
Air conditioning, Non-smoking rooms, Non-smoking throughout

Room facilities [ These may vary room to room ]
Air Conditioning, Alarm clock, Balcony, Bath or Shower, Bathroom, Cable Channels, Coffee machine, Dining area, Dining table, Dishwasher, Fan, Flat-screen TV, Free toiletries, Hairdryer, Iron, Kitchen, Kitchenette, Kitchenware, Linen, Oven, Patio, Refrigerator, Sea view, Seating Area, Shower, Stovetop, Toaster, Toilet, Towels, TV, Upper floors accessible by stairs only, View

Last updated: 1 Apr 2025 - Update now

Hotel Policies

Check-In
From 15:00:00 hours

Check-Out
-11:00:00 hours

Cancellation / Prepayment
Cancellation, prepayment and 'book now pay later' policies vary according to room type. Please check the room conditions when selecting your room above.

Accepted credit cards
The hotel reserves the right to pre-authorise credit cards prior to arrival.

The fine print
Guests are required to show a photo identification and credit card upon check-in. Please note that all Special Requests are subject to availability and additional charges may apply.

Traveller reviews

8.1

Very good

1543 verified reviews

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Joanna

“Wonderful”

9.0

29 Mar 2025

Clean. Beautiful view on the ocean every single morning We didn’t have to leave a room to watch a sunrise. Yoga in the morning ,breakfast included,pool , bicycles first come first served. and the best restaurant “the bullied”.which serve amazing artichoke deep, and the best on the island ribs . People there are very helpful and very nice.

Antoniya

“We had a wonderful stay.”

9.0

02 Mar 2025

We really enjoyed exploring the area using the provided free bikes. Starting the day with sunrise yoga definitely elevated our stay. The breakfast and filtered water was also appreciated. The room was clean and nice.

Ales

“great location, beautiful view”

9.0

27 Feb 2025

good location, free parking at the hotel, room with a beautiful sea view, friendly staff at the reception, many restaurants for dinner around the hotel

Lena

“Perfect views”

8.0

27 Feb 2025

If you are looking for a quiet location and perfect ocean view, this is a perfect choice.

Dominika

“Spacious and comfortable”

10.0

09 Feb 2025

The room was very spacious and comfortable. Good choice of restaurants within a walking distance. Sunrise from the courtyard was incredible. Breakfast to go was handy - sugary cereal, fruit, yogurt etc. The roosters let us sleep till 5:30 which was generous compared to roosters in different part of the island.

Suzie

“Great location and would here stay again.”

8.0

12 Jan 2025

Location was great and the grab and go breakfast was included and was just what we needed. 7am yoga watching the sunrise was fabulous too.

Nathan

“Perhaps not a great value for the price”

6.0

18 Dec 2024

Friendly, helpful staff, as well as a decent central location on the east side of the island. Several restaurants, stores and food trucks were within a short drive or moderate walking distance. Pool and patios were nice enough.

Derry

“Nice stay”

8.0

16 Dec 2024

The room was clean, the free bikes to explore part of the island was amazing as we didn’t have a car and the grab + go breakfast was a pleasant surprise!

Demish