Bask in the sun at The ISO by Castle, a beachfront resort with white sand shores and crystal-clear waters. Enjoy snorkeling, an outdoor pool, bike rentals and a refreshing water dispenser.
Reviews
8.48.4 out of 10
Very good
Popular amenities
Bar
Air conditioning
Non-smoking
Main amenities (9)
On the beach
Restaurant and bar/lounge
Outdoor pool
Air conditioning
Garden
Water dispenser
Limited hour front desk
Snorkeling
Bike rental
Feel at home (6)
Refrigerator
Private bathroom
Television
Garden
Coffee/tea maker
Blackout drapes/curtains
The current price is $199
$199
$270 total
includes taxes & fees
Feb 23 - Feb 24
Room options
Available filters for rooms
Showing 7 of 7 rooms
View all photos for Ocean Front View (1st - 3rd Upper Floors)
Ocean Front View (1st - 3rd Upper Floors)
Highlights
Balcony
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Blackout drapes/curtains
Ceiling fan
Private bathroom
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)
Highlights
Balcony
Separate sitting area
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Blackout drapes/curtains
Ceiling fan
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)
Highlights
Balcony
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Blackout drapes/curtains
Ceiling fan
Private bathroom
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)
Highlights
Balcony
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Blackout drapes/curtains
Ceiling fan
Private bathroom
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)
Highlights
Balcony
Separate dining area
Separate sitting area
Air conditioning
Free cribs/infant beds
Kitchen
Refrigerator
Dishwasher
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)
Highlights
Balcony
Separate dining area
Separate sitting area
Air conditioning
Free cribs/infant beds
Kitchenette
Refrigerator
Flat-screen TV
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)
Tropical Dreams Hawaiian Gourmet Ice Cream - 7 min walk
Burger King - 18 min walk
About this property
The ISO by Castle
Situated by the ocean, The ISO by Castle is a great choice for a stay in Kapaa. The outdoor pool is a great spot to take a dip, and guests can grab a bite to eat at The Bullshed Restaurant, which serves local cuisine and is open for dinner. Other highlights include a bar/lounge and a garden. Fellow travelers love the pool and helpful staff.
Languages
English
At a glance
Hotel size
78 units
Arranged over 3 floors
Arriving/Leaving
Check-in start time: 3:00 PM; Check-in end time: 10:00 PM
Minimum check-in age: 18
Check-out time is 11 AM
Late check-out subject to availability
Special check-in instructions
The front desk is open daily from 7:00 AM - 10:00 PM
Front desk staffed during limited hours
Required at check-in
Credit card, debit card, or cash deposit required for incidental charges
Government-issued photo ID may be required
Minimum check-in age is 18
Pets
Pets not allowed
Other information
Smoke-free property
Property amenities
Food and drink
Restaurant
Bar/lounge
Water dispenser
What to do
On the beach
Yoga classes
Snorkeling
Golfing nearby
Services
Front desk (limited hours)
Bicycle rentals
Facilities
5 buildings/towers
Garden
An outdoor pool
Water dispenser
Room amenities
Be entertained
42-inch flat-screen TV
Cable TV channels
Home comfort
Air conditioning
Ceiling fan
Coffee/tea maker
Sleep well
Blackout drapes/curtains
Bed sheets provided
What to enjoy
Balcony
Freshen up
Private bathroom
Shower/tub combination
Free toiletries
Towels
Stay connected
Laptop-friendly workspace
Food and drink
Refrigerator
Special features
Dining
The Bullshed Restaurant - This beachfront restaurant specializes in local cuisine and serves dinner only. Guests can enjoy drinks at the bar.
Fees & policies
Mandatory fees
You'll be asked to pay the following charges by the property at check-in or check-out. Fees may include applicable taxes:
Resort fee: USD 35.38 per accommodation, per night
Resort fee inclusions:
Additional inclusions
Fitness/yoga classes
Newspaper
Parking
Self parking
WiFi access (may be limited)
Optional extras
Late check-out can be arranged for an extra charge (subject to availability)
Policies
Only registered guests are allowed in the guestrooms.
This property does not have elevators.
This property accepts credit cards and debit cards. Cash is not accepted.
State tax ID - W-34434930-01
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
Frequently asked questions
Does The ISO by Castle offer free cancellation for a full refund?
Yes, The ISO by Castle does have fully refundable room rates available to book on our site. If you’ve booked a fully refundable room rate, this can be cancelled up to a few days before check-in depending on the property's cancellation policy. Just make sure to check this property's cancellation policy for the exact terms and conditions.
Is there a pool at The ISO by Castle?
Yes, there's an outdoor pool.
Are pets allowed at The ISO by Castle?
Sorry, pets aren't allowed.
What are the check-in and check-out times at The ISO by Castle?
Check-in start time: 3:00 PM; Check-in end time: 10:00 PM. Check-out time is 11 AM. Late check-out is available for a charge (subject to availability).
What is there to do at The ISO by Castle and nearby?
Have fun during the warmer months with activities such as snorkeling. Additional recreation onsite includes yoga. Enjoy a swim in the outdoor pool or use the resort's other amenities, which include a garden.
Are there restaurants at or near The ISO by Castle?
Yes, The Bullshed Restaurant offers beachfront dining and local cuisine.
Does The ISO by Castle have any outdoor private spaces?
Yes, every room features a balcony.
What's the area around The ISO by Castle like?
The ISO by Castle is a short 10-minute walk from Waipouli Beach and 16 minutes' walk from Coconut Marketplace. Travelers give top marks for the resort's prime location.
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The ISO by Castle Reviews
Reviews
8.4
Very Good
All reviews shown are from real guest experiences. Only travelers who have booked a stay with us can submit a review. We verify reviews according to our guidelines and publish all reviews, positive or negative.More informationOpens in a new window
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
8/10 Very good
Feb 17, 2025
Hotel was nice but a little outdated room was clean liked the grab n go breakfast good location
Laurie
Laurie, 5-night trip
8/10 Very good
Jan 3, 2025
Solid choice in Kauai!
Great ocean view and super close access to the beach! Very clean and quiet room!
Yebin
Yebin, 3-night trip
6/10 Good
Feb 1, 2025
Not so clean out dated room good location
Jordan
Jordan, 5-night trip
4/10 Fair
Feb 15, 2025
good location, needs a refresh
Grab & go breakfast was convenient and the location was good - near grocery store and restaurants with an ocean view. Our room, however, was quite run down and even though I reserved a king bed, we were given two doubles with no other options available. Isn't that what a reservation is for?
Stephanie
Stephanie, 5-night trip
10/10 Exceptional
Dec 24, 2024
Value for money at Ksuai
Very homely
Susmit
Susmit, 5-night trip
10/10 Exceptional
Nov 18, 2024
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.
Anne
Anne, 2-night trip
8/10 Very good
Dec 7, 2024
modest property on the water
good budget accommodation though not at a budget price.
douglas
douglas, 6-night trip
10/10 Exceptional
Nov 7, 2024
Amazing
Amazing stay . Great service . Great amenities.
Javier
Javier, 4-night trip
10/10 Exceptional
Oct 26, 2024
Stunning views great service and extremely convenient and affordable
Justin
Justin, 4-night trip
10/10 Exceptional
Aug 18, 2024
Very good place near the airport
Ynmar
Ynmar, 5-night trip
10/10 Exceptional
Oct 22, 2024
view and pool
Great view and pool
Gaylord
Gaylord, 1-night trip
6/10 Good
Aug 6, 2024
Had a pleasant enough stay
Claudia
Claudia, 3-night trip
10/10 Exceptional
Jul 24, 2024
Great location
Philip
Philip, 3-night trip
8/10 Very good
Oct 18, 2024
It has a surprising ocean view
Shana
Shana, 4-night trip
8/10 Very good
Feb 9, 2025
Peaceful Place On The Ocean
Thus is a nice place right on the ocean. If you are looking for peace and quiet, this place has it. It did however seem pricey for what you get. The complementary "grab and go" breakfast was lacking. They did not have any hot coffee available. We were surprised by that as were several of the other guests. When asking about it at the front desk, we were told to use the coffee maker in the room. I tend to avoid those things as I have seen some pretty grungy ones over the years. Their coffee maker looked clean, but we opted to walk down the street to Starbucks.
Robert
Robert, 5-night trip
10/10 Exceptional
Nov 14, 2024
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.
Mansi
Mansi, 3-night trip
10/10 Exceptional
Jun 19, 2024
Great place
Frederick
Frederick, 1-night trip
6/10 Good
Oct 24, 2024
The rooms are dated and need upgrading- the grounds and view are beautiful
James
James, 2-night trip
10/10 Exceptional
Nov 6, 2024
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.
Cathrine
Cathrine, 2-night trip
10/10 Exceptional
Jul 18, 2024
Great property
Julio
Julio, 4-night trip
10/10 Exceptional
Sep 29, 2024
Very satisfied sleep well at night
Zoraida
Zoraida, 3-night trip
8/10 Very good
Oct 7, 2024
A lot of bang for your buck. The property was so reasonably priced. The view is so beautiful. The hotel is older but clean and has a cute vibe. The only complaint is the beds are a little hard.
Carrie
Carrie, 5-night trip
10/10 Exceptional
Aug 13, 2024
Property has nice view the rooms and bathroom have been remodeled. Continental breakfast I good!
NATALIE
NATALIE, 4-night trip
10/10 Exceptional
Jul 1, 2024
Cleanliness and overall beauty of the hotel
Gabriel
Gabriel, 4-night trip
10/10 Exceptional
Aug 19, 2024
Kind, helpful staff. Nice pool, cold breakfast and yoga!