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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) | Balcony view
One Bedroom Ocean View (2nd Floor) | Private kitchenette | Fridge, coffee/tea maker
Ocean View (1st - 3rd Upper Floors) | Laptop workspace, blackout drapes, Internet, bed sheets
Exterior

Reviews

8.4 out of 10
Very good

Popular amenities

  • Bar
  • Air conditioning
  • Pool
  • Restaurant

Explore the area

Map
4-796 Kuhio Hwy, Kapaa, HI, 96746
  • Waipouli Beach
    ‪10 min walk‬
  • Coconut Marketplace
    ‪16 min walk‬
  • Fuji Beach
    ‪16 min walk‬
  • Lihue, HI (LIH)
    ‪14 min drive‬

Room options

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

Laptop workspace, blackout drapes, Internet, bed sheets

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

  • 290 sq ft
  • 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)

  • 290 sq ft
  • 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)

  • 290 sq ft
  • 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) | Laptop workspace, blackout drapes, Internet, bed sheets

Ocean View (1st - 3rd Upper Floors)

  • 290 sq ft
  • 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)

  • 640 sq ft
  • 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)

  • 580 sq ft
  • 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)

Laptop workspace, blackout drapes, Internet, bed sheets

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

  • 290 sq ft
  • Ocean view
  • Sleeps 3
  • 1 King Bed

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$385 total
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About this property

The ISO by Castle

3.5-star Kapaa resort with restaurant
At The ISO by Castle, relax by an outdoor pool or hit the beach where you can enjoy snorkeling.
The ISO by Castle offers 78 air-conditioned accommodations with complimentary toiletries and ceiling fans. Rooms open to balconies. 42-inch flat-screen televisions come with cable channels. Guests can make use of the in-room refrigerators and coffee/tea makers. Bathrooms include shower/tub combinations.
Recreational amenities at the resort include an outdoor pool.

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

The resort offers a restaurant. A bar/lounge is on site where guests can unwind with a drink. This beach resort also offers an outdoor pool, a garden, and a water dispenser.

The ISO by Castle is a smoke-free property.

The Bullshed Restaurant - This beachfront restaurant specializes in local cuisine and serves dinner only. 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
  • Snorkeling
  • Yoga classes

Family friendly

  • In-room refrigerator
  • Outdoor pool

Conveniences

  • Limited-hour front desk
  • Water dispenser

Outdoors

  • Garden
  • On the beach

Accessibility

  • No elevator

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

Pets not allowed

Children and extra beds

Children are welcome
Rollaway/extra beds are not available

Property payment types

Important information

Fees

You'll be asked to pay the following charges at the property. Fees may include applicable taxes:

  • 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 have included all charges provided to us by the property.

Optional extras

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

The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.

You need to know

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

We should mention

This property does not have elevators
Only registered guests are allowed in the 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. 466 out of 1002 reviews
Rating 8 - Good. 356 out of 1002 reviews
Rating 6 - Okay. 113 out of 1002 reviews
Rating 4 - Poor. 39 out of 1002 reviews
Rating 2 - Terrible. 28 out of 1002 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

4/10 Poor

Jennifer

Traveled with partner
Disliked: Cleanliness, amenities, property conditions & facilities
Stayed 6 nights in Nov 2024

8/10 Good

Sheryl Lorraine, Riverbank

Liked: Cleanliness, staff & service, amenities
Not a resort. Clean, good price, no frills, fantastic view,quiet and convenient location. We would stay again. Hotel should add in room safe and desk. Clean and no pests. Kept lanai door open to listen to the crashing waves at night. Beautiful sunrises every day. No elevator so beware if you are a senior. Housekeeping with 24 hour request. Needs cosmetic work bit otherwise great!
Stayed 5 nights in Nov 2024

10/10 Excellent

Hugo

Liked: Staff & service, property conditions & facilities
Staff super friendly and the breakfast super convenient saves you aome bucks
Stayed 6 nights in Nov 2024

10/10 Excellent

Brent

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Great ocean views
Stayed 3 nights in Nov 2024

6/10 Okay

Emily

Stayed 3 nights in Nov 2024

10/10 Excellent

Kevin

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Great place
Stayed 4 nights in Nov 2024

10/10 Excellent

Anne

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Yoga on the beach every morning 7-8 was wonderful and the bikes in the lobby were free to use. Ver nice property, I really enjoyed my stay.
Stayed 2 nights in Nov 2024

6/10 Okay

Patricia

Traveled with group
Needs better breakfast options.. the “L” rooms need to do something about the giant beams that run thru the room and block the closets..
Stayed 6 nights in Oct 2024

6/10 Okay

Sara

Traveled with partner
Liked: Cleanliness
Disliked: Property conditions & facilities
I wasn’t aware that our room was above the restaurant on the property so we heard the music from downstairs up until the restaurant closed. We also had a couple next door who were fighting loudly on one night, which made it hard to sleep. The room was clean though and we enjoyed the complimentary bikes which we took out on the Kapaa trail. I also liked the location next to the beach.
Stayed 5 nights in Nov 2024

10/10 Excellent

Mansi

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
The staff was so friendly. One of them even gave us her personal beach chairs to take out for the day. They have bikes available for free for day use as first come first serve. Property is beautiful and area around it has LOTS to eat/shop/ we had a car and it was perfect central location to see the whole island! Will definitely stay there again.
Stayed 3 nights in Oct 2024

10/10 Excellent

Seth

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 4 nights in Nov 2024

10/10 Excellent

Maria Luisa

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Stayed 4 nights in Oct 2024

10/10 Excellent

Javier

Traveled with family
Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Amazing
Amazing stay . Great service . Great amenities.
Stayed 4 nights in Nov 2024

8/10 Good

kim

Traveled with family
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
When we walked in the room was very musky smelling. Very strong but went away after a while. Also there was rust on the wall. Other than that we enjoyed our stay
Stayed 1 night in Nov 2024

6/10 Okay

Rachel

Liked: Cleanliness, staff & service
Stayed 1 night in Sep 2024

10/10 Excellent

Cathrine

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Clean room, it has basic amenities, big bed although it was a bit stiff for me but it was good enough for 2 nights nice view of the pool/ocean and sunrise. Restaurant has great food. I love the free artichoke dip it was the best Mai Tai was really good not too strong alcohol. My main course was their special Spinach meatless wrap and it was excellent.
Stayed 2 nights in Nov 2024

8/10 Good

Kamichia

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
We stayed at The ISO before & had a great experience then, so we booked it for our recent vacation. We stayed 8 nights & had the best room in the hotel, which was oceanfront. Because we spend so much time away from our room, we don’t book overly expensive hotels. We prefer to spend our vacation funds on dining, excursions, visiting parks, etc. The ISO fits our budget & offers what we need. The best part of this hotel is the location & the fact that you are steps from the beach. Each morning we got to see the beautiful sunrise & we looked for shells on the beach. We also saw turtles from our balcony! This is the most affordable oceanfront hotel on Kauai. If you need extra amenities, lots of staff, housekeeping daily, room service, etc, then you may prefer to stay elsewhere. The only issue I have with this hotel is the $30 daily resort fee. If it was $15, I think that would be a more realistic fee. Overall, we were happy with the room, the staff, the grounds, the breakfast options, fridge in the room, coffee pot in the room, bed, location, etc. We will stay here again on our next visit to Kauai!
Stayed 8 nights in Oct 2024

8/10 Good

Caitlin

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 4 nights in Oct 2024

10/10 Excellent

Henry, Honolulu

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 2 nights in Oct 2024

10/10 Excellent

Justin

Liked: Staff & service, property conditions & facilities
Stunning views great service and extremely convenient and affordable
Stayed 4 nights in Oct 2024

6/10 Okay

James

Traveled with family
The rooms are dated and need upgrading- the grounds and view are beautiful
Stayed 2 nights in Oct 2024

10/10 Excellent

Gaylord

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
view and pool
Great view and pool
Stayed 1 night in Oct 2024

10/10 Excellent

Jennifer L

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 9 nights in Oct 2024

8/10 Good

Shana

Liked: Cleanliness, staff & service, property conditions & facilities
It has a surprising ocean view
Stayed 4 nights in Oct 2024

10/10 Excellent

Ashley

Traveled with family and small children, Traveled with partner
Liked: Property conditions & facilities
If you’re looking for a Hilton or some upscale hotel this isn’t it, but it’s still very nice. We had a large room with a balcony that opened up to an ocean front view (I believe all rooms have this). When you pull up it has more of a motel feel but the room was actually very nice, spacious and had a cozy island feel. It was easy to control the temp in the room and they were able to accommodate a pack and play for my baby which I really appreciated. Free breakfast is offered daily and you can walk across the street to Safeway, the drugstore, starbucks and other shops. It’s also walking distance from some local spots which was hugely convenient for us and we loved having the boardwalk from the beach to the Sheraton Hotel right next to us because we were attending a wedding there just a walk away. We would definitely stay here again.
Stayed 3 nights in Oct 2024