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The ISO by Castle

3.5 star property

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Photo gallery for The ISO by Castle

Outdoor pool
Beach House Suite (2nd floor, stair access only) | Beach/ocean view
One Bedroom Ocean View (2nd Floor, stair access only) | Private kitchenette | Fridge, coffee/tea maker
Beach House Suite (2nd floor, stair access only) | Balcony view
One Bedroom Ocean View (2nd Floor, stair access only) | Living room | 42-inch flat-screen TV with cable channels, TV

Reviews

8.4 out of 10
Very good

Popular amenities

  • Bar
  • Air conditioning

Explore the area

View in a map
4-796 Kuhio Hwy, Kapaa, HI, 96746
  • Place, Waipouli Beach
    ‪3 min walk‬
  • Place, Coconut Marketplace
    ‪14 min walk‬
  • Place, Lae Nani Beach
    ‪3 min drive‬
  • Airport, Lihue, HI (LIH)
    ‪15 min drive‬

Room options

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

1 bedroom, laptop workspace, blackout curtains, Internet

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

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

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

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

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

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 Deluxe Room, Ocean View (2nd Floor - stair access only)

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

Deluxe Room, Ocean View (2nd Floor - stair access only)

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 One Bedroom Ocean View (2nd Floor, stair access only)

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

One Bedroom Ocean View (2nd Floor, stair access only)

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

View all photos for Beach House Suite (2nd floor, stair access only)

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

Beach House Suite (2nd floor, stair access only)

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

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

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

Partial Ocean/Pool View (1st - 2nd Upper Floors, stair access only)

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

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

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)

10.0 out of 10
Exceptional
(1 review)
  • 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 beach and the location
  • 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.

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. 481 out of 1003 reviews
Rating 8 - Good. 331 out of 1003 reviews
Rating 6 - Okay. 120 out of 1003 reviews
Rating 4 - Poor. 41 out of 1003 reviews
Rating 2 - Terrible. 30 out of 1003 reviews

8.8/10

Cleanliness

8.4/10

Staff & service

8.0/10

Amenities

8.2/10

Property conditions & facilities

8.4/10

Eco-friendliness

Reviews

4/10 Poor

Clifford

Disliked: Cleanliness, staff & service, property conditions & facilities
Musty smell in the room. Pillow case smelled as if it wasn't changed. Pictures of the place deceivingly look good. But nothing like it in person. The place looks old. But have to admit price is good, and a good location as a base to visit the north, south and west.
Stayed 6 nights in Jul 2025

10/10 Excellent

Mengqing

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
It's a very good safe place to stay.
Stayed 4 nights in Jul 2025

8/10 Good

CHUNMEI XIE VAN

Travelled with family
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
The staff were very friendly and very accommodating to make our stay enjoyable. Our room was quite comfortable with a kitchen and separate bedroom although there were a few areas needing minor repair and painting.
Stayed 7 nights in Jul 2025

8/10 Good

Cynthia

Liked: Cleanliness, staff & service
Older establishment but very clean, great view and good restaurant nearby. Only couple of blocks from coconut market. Gave you privacy only tidied your room upon request. Affordable.
View from our room.
Stayed 7 nights in Jul 2025

10/10 Excellent

kurt

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

10/10 Excellent

Wallace

Travelled with family
Liked: Staff & service, property conditions & facilities
Disliked: Room comfort

Property is a good location very Central

Staff is extremely friendly & knowledgeable one AC did not work & second room. AC was adequate, but could’ve been a little colder. property was in good shape
Stayed 7 nights in Jul 2025

10/10 Excellent

Kiarah

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Had a lot of amenities like a nice grab and go breakfast as well as bikes you could rent out. They also did morning yoga and had a great pool.
Stayed 2 nights in Jul 2025

6/10 Okay

Paul

Disliked: Property conditions & facilities

Location good hotel very average

Somewhat remodeled hotel, not a resort. Do not bring your kids no beach and beach swimming. Located on water but unable to swim due to rocks and break. AC needs upgrade and was there for three days and was offered no housekeeping service. Was handed towels and they never came to room to ask if I needed service. Very very poorly done. For the price I would look at other options.
Stayed 1 night in Jul 2025

8/10 Good

Paul

Liked: Cleanliness, staff & service
Great location nice restaurant attached to Hotel. No beach for swimming though but very nice location on the water. Nice pool very quiet location.
Stayed 2 nights in Jul 2025

10/10 Excellent

Raul

Stayed 6 nights in Jul 2025

10/10 Excellent

KIANAMALIA

Stayed 2 nights in Jul 2025

6/10 Okay

Malcolm

Liked: Staff & service
The property is just old and the rooms are very small for two non married people even though they had two beds. They try hard to keep it clean but remodeling is necessary. All in all it was a good stay
Stayed 14 nights in Jun 2025

8/10 Good

Donna

Travelled with partner
Liked: Cleanliness, amenities, property conditions & facilities
Great location, bikes were nice for the bike path, breakfast,grab and go was helpful.. property was older but well kept.
Stayed 4 nights in Jul 2025

10/10 Excellent

Antoinette

Stayed 4 nights in Jul 2025

10/10 Excellent

Steve

Travelled with group
Liked: Cleanliness, amenities, property conditions & facilities
Nothing to dislike like about the stay. Will recommend for friends for certain who want to visit Kauai. Experience was amazing, along with the staff.
Stayed 2 nights in Jul 2025

10/10 Excellent

DWARAKESH, FREMONT

Liked: Property conditions & facilities
Great views outside the balcony
Stayed 3 nights in Jun 2025

10/10 Excellent

Douglas

Liked: Cleanliness, amenities, property conditions & facilities
Stayed 2 nights in Jun 2025

8/10 Good

Clint Eric

Travelled with family
Liked: Amenities
The breakfast could use a few more selections and a coffee pot. The amenities were unique and nice! The bikes, morning yoga as well as the pool were nice to have! As well as the unique welcoming gifts. The cleanliness of the room was just okay. Noticed lots of dirt that was just missed as well as the room smelled of mildew.
Stayed 6 nights in Jun 2025

10/10 Excellent

Brian

Travelled with family, Travelled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
The ISO is a great affordable option to some of the other overblown resorts in the area. Rooms are clean and comfortable, staff is helpful, and the hotel is conveniently located close to some great restaurants and island excursions. While it may not have the bells and whistles of nearby options, it has a pool, a great continental breakfast, and EVERY room is ocean-view.
Stayed 7 nights in Jun 2025

10/10 Excellent

Hayley

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Amazing place to stay in Kauai! 10/10 recommend. Friendly staff, prime location, beautiful grounds, clean rooms!
Stayed 3 nights in Jun 2025

10/10 Excellent

Leonor

Stayed 2 nights in Jun 2025

8/10 Good

Marcus

Travelled with partner
Liked: Cleanliness, staff & service
A little tired the property is, but with free bikes, a pool and great views to the beach- we were satisfied. Breakfast has some fresh fruit, sweet yogurt and bakery items. Staff were hit and miss (afternoon shift was lovely).
Stayed 3 nights in Jun 2025

6/10 Okay

Naziroh

Stayed 2 nights in Jun 2025

10/10 Excellent

Jezzamine

Stayed 5 nights in May 2025

8/10 Good

Onell

Travelled with family
Liked: Cleanliness, amenities, property conditions & facilities
It was ok. Shower didnr work wekl and couldn't get them to fix it. Continental breakfast was grab and go cold cereal, granola bars, yogurt etc. The pool waz nice
Stayed 5 nights in May 2025