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The ISO by Castle

3.5 star property

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Photo gallery for The ISO by Castle

Relax by the pool surrounded by palm trees and lounge chairs.
Relax on the large bed with a view of the ocean and palm trees from the balcony.
Enjoy the serene ocean views from this coastal property's lawn, leading to a rocky shoreline.
Relax in a covered outdoor space with ocean views, lounge chairs, and a table.
Relax in a spacious living area with a sofa, coffee table, and kitchenette, offering a comfortable space to unwind.

Reviews

8.4 out of 10
Very good

Popular amenities

  • Bar
  • Air conditioning

Explore the area

Map
4-796 Kuhio Hwy, Kapaa, HI, 96746
  • Waipouli Beach
    ‪3 min walk‬
  • Coconut Marketplace
    ‪14 min walk‬
  • Lae Nani Beach
    ‪3 min drive‬
  • Lihue, HI (LIH)
    ‪15 min drive‬

Room options

View all photos for Ocean Front View (1st - 3rd Upper Floors)

1 bedroom, laptop workspace, blackout curtains, Internet

Ocean Front View (1st - 3rd Upper Floors)

7.8 out of 10
Good
(30 reviews)
  • 27 sq m
  • Ocean view
  • Sleeps 3
  • 2 Double Beds OR 1 King Bed

View all photos for Ocean View Deluxe Room (2nd Floor)

Ocean View Deluxe Room (2nd Floor) | Living area | 42-inch flat-screen TV with cable channels, TV

Ocean View Deluxe Room (2nd Floor)

7.8 out of 10
Good
(14 reviews)
  • 27 sq m
  • Ocean view
  • Sleeps 4
  • 1 King Bed and 1 Double Sofa Bed OR 2 Double Beds

View all photos for Partial Ocean/Pool View (1st - 2nd Upper Floors)

Partial Ocean/Pool View (1st - 2nd Upper Floors) | View from room

Partial Ocean/Pool View (1st - 2nd Upper Floors)

10.0 out of 10
Exceptional
(4 reviews)
  • 27 sq m
  • Partial ocean view
  • Sleeps 3
  • 2 Double Beds OR 1 King Bed

View all photos for Ocean View (1st - 3rd Upper Floors)

Ocean View (1st - 3rd Upper Floors) | 1 bedroom, laptop workspace, blackout curtains, Internet

Ocean View (1st - 3rd Upper Floors)

8.6 out of 10
Excellent
(62 reviews)
  • 27 sq m
  • Ocean view
  • Sleeps 3
  • 2 Double Beds OR 1 King Bed

View all photos for Beach House Suite (2nd floor)

Beach House Suite (2nd floor) | Living area | 42-inch flat-screen TV with cable channels, TV

Beach House Suite (2nd floor)

10.0 out of 10
Exceptional
(1 review)
  • 59 sq m
  • Ocean view
  • Sleeps 4
  • 1 King Bed and 1 Queen Sofa Bed

View all photos for One Bedroom Ocean View (2nd Floor)

One Bedroom Ocean View (2nd Floor) | Private kitchenette | Fridge, coffee/tea maker

One Bedroom Ocean View (2nd Floor)

9.0 out of 10
Wonderful
(2 reviews)
  • 54 sq m
  • Ocean view
  • Sleeps 4
  • 1 King Bed and 1 Double Sofa Bed

View all photos for Premium Ocean Front View (1st - 3rd Upper Floors, stair access only)

1 bedroom, laptop workspace, blackout curtains, Internet

Premium Ocean Front View (1st - 3rd Upper Floors, stair access only)

  • 27 sq m
  • Ocean view
  • Sleeps 3
  • 1 King Bed

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About this property

The ISO by Castle

Beachfront, with outdoor pool
At The ISO by Castle, relax by an outdoor pool or hit the beach where you can enjoy snorkelling.
The ISO by Castle offers 78 air-conditioned accommodations with free toiletries and a ceiling fan. Rooms open to balconies. 42-inch flat-screen televisions come with cable channels. Guests can make use of the in-room fridges and coffee/tea makers. Bathrooms include a combined bath/shower unit.
Recreational amenities at the resort include an outdoor pool.

The recreational activities listed below are available either on-site or nearby; fees may apply.

Our customers tell us that they can't get enough of the pool at The ISO by Castle. During your stay, you'll be within walking distance of Waipouli Beach. You'll find features such as an outdoor pool, a restaurant and a bar.
  • Enjoy local cuisine and a beachfront location while dining at The Bullshed Restaurant
  • Take a swim in the outdoor pool
  • Amenities include a water dispenser
  • On-site recreation includes bicycles to rent and yoga classes
  • Guests have great things to say about the location and the clean guestrooms
  • 10 minutes on foot from Waipouli Beach and a 2-minute drive from Coconut Marketplace
There's a restaurant on site. You can enjoy a drink at the bar/lounge. The ISO by Castle also features an outdoor pool, a garden, and a water dispenser.

This 3.5-star Kapaa resort is smoke free.

The Bullshed Restaurant – This beachfront restaurant specialises in local cuisine and only serves dinner. Guests can enjoy drinks at the bar.

Languages

English

Property amenities

Internet

  • Available in all rooms: High-speed internet

Food and drink

  • A bar/lounge
  • A restaurant

Restaurants on site

  • The Bullshed Restaurant

Things to do

  • Bicycle rentals
  • Outdoor pool
  • Snorkelling
  • Yoga classes

Family friendly

  • In-room refrigerator
  • Outdoor pool

Conveniences

  • Limited-hour front desk
  • Water dispenser

Outdoors

  • Garden
  • On the beach

Accessibility

  • No lift

More

  • 3 floors
  • 5 buildings
  • Smoke-free property
  • Water dispenser usage encouraged

Room amenities

Bedroom

  • Bedsheets provided
  • Blackout drapes

Bathroom

  • Free toiletries
  • Private bathroom
  • Shower/bathtub combination
  • Towels provided

Entertainment

  • 42-inch flat-screen TV with cable channels

Food and drink

  • Coffee/tea maker
  • Refrigerator

More

  • Air conditioning
  • Ceiling fan
  • Laptop workspace

Policies

Check-in

Check-in start time: 3:00 PM; check-in end time: 10:00 PM
Minimum check-in age - 18

Check-out

Check-out before 11 AM
Late check-out subject to availability
A late check-out fee will be charged

Special check-in instructions

The front desk is open daily from 7:00 AM - 10:00 PM
Front desk staffed during limited hours

Access methods

Front desk (limited hours)

Pets

  • No pets allowed

Children and extra beds

  • Children are welcome.
  • Rollaway/extra beds are not available.

Payment types at the property

Important information

Fees

Guests will be asked to pay the following charges at the property:

  • Resort fee: USD 35.38 per accommodation, per night
The resort fee includes:
  • Additional inclusions
  • Fitness/yoga classes
  • Newspaper
  • Parking
  • Self-parking
  • WiFi access (may be limited)

We've listed all charges provided to us by the property.

Optional extras

The fees and deposits listed below will be charged at the time of service, check-in, or check-out.

  • Late check-out is available for a fee (subject to availability)

This may not be a comprehensive list. Fees and deposits are subject to change and might not include tax.

You need to know

This property is managed by a professional host. The provision of housing is linked to their trade, business or profession.
Extra-person charges may apply and vary depending on property policy
Government-issued photo identification and a credit card, debit card or cash deposit may be required at check-in for incidental charges
Special requests are subject to availability upon check-in and may incur additional charges; special requests cannot be guaranteed
Tax ID - W-34434930-01
This property accepts credit cards and debit cards; cash is not accepted
Safety features at this property include a smoke detector
This property has outdoor spaces, such as balconies, patios and terraces, which may not be suitable for children; if you have any concerns, we recommend contacting the property prior to your arrival to confirm that they can accommodate you in a suitable room
The front desk at this property is open daily from 7:00 AM - 10:00 PM.
Front desk staff will greet guests on arrival at the property.
If you cancel your booking, you'll be subject to the host's cancellation policy. In accordance with EU regulations about consumer rights, property booking services are not subject to the right of withdrawal.

We should mention

  • Registered guests are the only ones allowed to be in guestrooms.

Property is also known as

Castle Mokihana
Castle Mokihana Hotel
Castle Mokihana Hotel Kapaa
Castle Mokihana Kapaa
Mokihana Of Kauai Hotel Kapaa
ISO. Island. Sky. Ocean. Resort Kapaa
ISO. Island. Sky. Ocean. Resort
ISO. Island. Sky. Ocean. Kapaa
ISO. Island. Sky. Ocean.
ISO Sky Ocean Resort Kapaa
The ISO by Castle Kapaa
The ISO by Castle Resort
The ISO. Island. Sky. Ocean.
The ISO by Castle Resort Kapaa

The ISO by Castle Reviews

Reviews

8.4

Very good

Rating 10 - Excellent. 475 out of 1001 reviews
Rating 8 - Good. 340 out of 1001 reviews
Rating 6 - Okay. 116 out of 1001 reviews
Rating 4 - Poor. 41 out of 1001 reviews
Rating 2 - Terrible. 29 out of 1001 reviews

8.8/10

Cleanliness

8.4/10

Staff & service

8.0/10

Amenities

8.4/10

Property conditions & facilities

8.4/10

Eco-friendliness

Reviews

10/10 Excellent

Taysha

Stayed 3 nights in Apr 2025

8/10 Good

Anita

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort

Nice

Pleasant stay. Clean and comfortable. Staff was excellent, very accomodating. Beautiful ocean view.
Stayed 1 night in Apr 2025

10/10 Excellent

Verified traveller

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Stayed 3 nights in Mar 2025

6/10 Okay

Robert

Stayed 7 nights in Apr 2025

8/10 Good

Alexandra

Travelled with partner
Liked: Cleanliness, staff & service, property conditions & facilities
Decent location, very clean rooms and property. Great walking path along the beach and hotels.
Stayed 7 nights in Mar 2025

6/10 Okay

Heather

Travelled with partner
Liked: Cleanliness, staff & service, property conditions & facilities
Less busy area, which was nice to get away from the crowds. Comfy clean king bed. Limited hot water in the shower all three days. Convenient water and ice-filling station in the lobby. Loved the ability to rent cruiser bikes. The room and lobby were simple. The view and balcony from the one-bedroom was not as great/comfortable as pictures make it out to be. No direct access to the beach from the property, though the area isn't really swimmable there.
Stayed 2 nights in Mar 2025

10/10 Excellent

Rachael

Stayed 7 nights in Mar 2025

10/10 Excellent

Timothy

Travelled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Everything was amazing except for the shower water pressure wasn’t there and the water didn’t warm up enough… very quiet place and will like to come again
Stayed 4 nights in Apr 2025

10/10 Excellent

Don

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 4 nights in Mar 2025

10/10 Excellent

Anthony

Liked: Cleanliness, staff & service, property conditions & facilities
Beautiful setting. Grounds were pristine. Pool inviting. Great location. Quiet and only the sound of the waves. Beds were comfortable. Breakfast foods to go were well stocked. Coffee pot, and coffee in room very good.
Stayed 5 nights in Mar 2025

10/10 Excellent

Helen

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 3 nights in Feb 2025

10/10 Excellent

Brian Daniel

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 6 nights in Mar 2025

6/10 Okay

Shoko

Stayed 3 nights in Mar 2025

10/10 Excellent

Carisa

Stayed 1 night in Mar 2025

10/10 Excellent

Andreanna

Liked: Cleanliness, staff & service, property conditions & facilities
Great views. Great vibes
Stayed 1 night in Mar 2025

8/10 Good

Max

Travelled with family
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Great location right on the ocean. Stayed in the older section above the restaurant which was fine however they have music every night from 7 to 8:30. which reverberated up through the room. The food and service at the restaurant, "The Bull Shed" was excellent. Grounds were maintained beautifully.
Stayed 5 nights in Mar 2025

8/10 Good

Steven

Travelled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
We didn't get the room / building we wanted but it eventually worked out.
Stayed 6 nights in Feb 2025

10/10 Excellent

Andraluce

Liked: Cleanliness, staff & service
Stayed 1 night in Mar 2025

10/10 Excellent

C Kim

Travelled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
We loved that if was so quiet and the ammenities were outstanding. The oceanside room was so relaxing and beautiful sunrise. Highly recommend. We will definatley stay here again. Kuddos to Roberta at the front desk for being helpful.
Stayed 2 nights in Mar 2025

6/10 Okay

Jason

Stayed 4 nights in Feb 2025

8/10 Good

Carol

Business traveller
I would NOT eat at the Bull Shed restaurant. HORRIBLE. Nothing is fresh or good. stay away from this restaurant.
Stayed 1 night in Feb 2025

6/10 Okay

Effie

Travelled with partner
Liked: Cleanliness, staff & service
It was a property that could use some refurbishment. Of course it is overpriced, but everything is in Hawaii. The pool was clean and access to the property was convenient with a stoplight at the main intersection. Staff was very helpful. Breakfast was a joke. The coffee maker in the room didn’t make the coffee very hot, which was disappointing. Oh well. It was a decent place to stay. Not a high end resort. A place to sleep.
Stayed 10 nights in Feb 2025

10/10 Excellent

Carmen

Stayed 2 nights in Feb 2025

4/10 Poor

Pouya

Travelled with partner
Disliked: Staff & service, amenities, property conditions & facilities
The hotel has a few positives, starting with its peaceful atmosphere, great location, stunning views from the pool area, and a decent restaurant. However, that’s where the good points end. The rooms are outdated, with what’s advertised as an oceanfront view being only a partial ocean view. The staff are unwelcoming, the grab-and-go breakfast is disappointing, and the beds are extremely uncomfortable. While the rooms were clean, everything inside felt old and rusty, making it difficult to find anything positive to say about them. Overall, the hotel deserves five stars for its quiet and relaxing environment but zero stars for everything else, including the basic amenities expected from a hotel. If it were advertised as a motel, the rating might be more appropriate.
Stayed 6 nights in Feb 2025

10/10 Excellent

Lorna

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort

Great property.

We really enjoyed our stay at the ISO. The hotel met our needs for our 4 night stay. It is centrally situated so it was easy to explore. Clean rooms, comfortable bed and super friendly staff. Good dinner restaurant on property. Good selection of continental breakfast foods. Amazing sunrises! We would stay again if we come back to Kauai.
Beautiful sunrises
Stayed 4 nights in Feb 2025