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The ISO by Castle

3.5 star property
Beachfront, with outdoor pool

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Photo gallery for The ISO by Castle

Outdoor pool
One Bedroom Ocean View (2nd Floor) | Private kitchenette | Fridge, coffee/tea maker
One Bedroom Ocean View (2nd Floor) | Living room | 42-inch flat-screen TV with cable channels, TV
Ocean View (1st - 3rd Upper Floors) | Laptop workspace, blackout drapes, Internet, bed sheets
Beach House Suite (2nd floor) | Balcony view

Reviews

8.4 out of 10
Very good

Popular amenities

  • Bar
  • Air conditioning

Room options

Available filters for rooms
Showing 7 of 7 rooms

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)

Highlights

Balcony
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Ceiling fan
Blackout drapes/curtains
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) | Living area | 42-inch flat-screen TV with cable channels, TV

Ocean View Deluxe Room (2nd Floor)

Highlights

Balcony
Separate sitting area
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Ceiling fan
Blackout drapes/curtains
  • 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)

Highlights

Balcony
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Ceiling fan
Blackout drapes/curtains
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) | Laptop workspace, blackout drapes, Internet, bed sheets

Ocean View (1st - 3rd Upper Floors)

Highlights

Balcony
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Ceiling fan
Blackout drapes/curtains
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) | Living area | 42-inch flat-screen TV with cable channels, TV

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) | Private kitchenette | Fridge, coffee/tea maker

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)

Laptop workspace, blackout drapes, Internet, bed sheets

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

Highlights

Balcony
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Ceiling fan
Blackout drapes/curtains
Private bathroom
  • 27 sq m
  • Ocean view
  • Sleeps 3
  • 1 King Bed

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About the neighborhood

Map
4-796 Kuhio Hwy, Kapaa, HI, 96746

What's nearby

  • Waipouli Beach - 3 min walk - 0.2 miles
  • Coconut Marketplace - 14 min walk - 0.7 miles
  • Lae Nani Beach - 3 min drive - 1.0 mile
  • Kapa'a Beach Park - 4 min drive - 1.7 miles
  • Lydgate Beach - 5 min drive - 1.9 miles

Getting around

  • Lihue Airport (LIH) - 14 min drive

Restaurants

  • ‪Island Country Markets #93 - ‬16 min walk
  • ‪Starbucks - ‬6 min walk
  • ‪Lava Lava Beach Club - Kauai - ‬3 min drive
  • ‪Tropical Dreams Hawaiian Gourmet Ice Cream - ‬7 min walk
  • ‪Burger King - ‬18 min walk

About this property

The ISO by Castle

Resort located in Waipouli
Take advantage of a garden, a bar, and a restaurant at The ISO by Castle. This resort is a great place to bask in the sun with a white sand beach, beachfront dining, and snorkeling.
Other perks at this resort include:
  • An outdoor pool
  • Bike rentals, smoke-free premises, and a water dispenser
  • Guest reviews speak highly of the beach locale, pool, and helpful staff
Room features
All 78 rooms have comforts such as laptop-friendly workspaces and air conditioning, as well as thoughtful touches like high-speed internet. Guest reviews speak positively of the clean rooms at the property.
Other conveniences in all rooms include:
  • Bathrooms with shower/tub combinations and free toiletries
  • 42-inch flat-screen TVs with cable channels
  • Wardrobes/closets, balconies, and refrigerators

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
This property has outdoor spaces, such as balconies, patios, terraces which may not be suitable for children; if you have concerns, we recommend contacting the property prior to your arrival to confirm they can accommodate you in a suitable room

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

Frequently asked questions

Does The ISO by Castle have a pool?

Yes, this property has an outdoor pool.

Is The ISO by Castle pet-friendly?

No, pets are not allowed at this property.

What time is check-in at The ISO by Castle?

Check-in start time: 3:00 PM; Check-in end time: 10:00 PM.

What time is check-out at The ISO by Castle?

Check-out is at 11 AM. Late check-out is available for a fee (subject to availability).

Where is The ISO by Castle located?

Nestled on the beach, this Waipouli resort is within 1 mi (2 km) of Waipouli Beach, Fuji Beach, and Lae Nani Beach. Coconut Marketplace and Kapaa Shopping Center are also within 1 mi (2 km).

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The ISO by Castle Reviews

Reviews

8.4

Very Good

Rating 10 - Excellent. 472 out of 1000 reviews
Rating 8 - Good. 343 out of 1000 reviews
Rating 6 - Okay. 115 out of 1000 reviews
Rating 4 - Poor. 41 out of 1000 reviews
Rating 2 - Terrible. 29 out of 1000 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

Kyle

Liked: Cleanliness, staff & service, property conditions & facilities
Our stay was great! The ISO is in a great location within walking distance to several beaches and food options.
Stayed 2 nights in May 2025

10/10 Excellent

Celina

Liked: Cleanliness, staff & service, property conditions & facilities
Great location, friendly staff, good amenities
Stayed 4 nights in Apr 2025

10/10 Excellent

Natania Delfin

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Quiet, serene and conveniently located.
Stayed 3 nights in Apr 2025

8/10 Good

Alexandra

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

8/10 Good

Maitland E

Liked: Cleanliness, amenities
Overall I enjoyed my stay. The views were gorgeous. Everything was clean. The pool was great and the beach access there was awesome. All the staff was lovely as well. There were just some maintenance that would really round out the entire experience.
Stayed 8 nights in May 2025

10/10 Excellent

Serine

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
We love the ISO! The proximity of the ocean, the quiet enjoyment of the phenomenal view, and the sunrise from the rooms are priceless. Great location, friendly stuff, and pleasant stay to enjoy this wonderful island!
Stayed 7 nights in Apr 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

Laurie

Liked: Cleanliness, staff & service, room comfort
Hotel was nice but a little outdated room was clean liked the grab n go breakfast good location
Stayed 5 nights in Feb 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

C Kim

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

10/10 Excellent

Kevin

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

10/10 Excellent

Ellen

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
This was a delightful hotel with a lovely swimming pool and beautiful lawn on which we could relax and look at the ocean.
Stayed 3 nights in Jan 2025

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

Laurie

Liked: Cleanliness, staff & service, amenities
Staff was so accommodating and helpful. Rooms need updating but property is located on the ocean with awesome views/waves. Shopping/restaurants nearby.
Stayed 2 nights in Jan 2025

10/10 Excellent

Andrew

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Great location and property. AC was a little finicky but overall worth the stay for the price, and the view!
Stayed 3 nights in Dec 2024

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

8/10 Good

Max

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

10/10 Excellent

Bharath Tumkur

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Close to beach and they have a restaurant in the back!
Stayed 2 nights in Dec 2024

10/10 Excellent

Corey

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Really enjoyed my stay at The ISO...I really love the bikes...I just wish they had a washer and dryer, maybe 2 of each...Great stay
Stayed 4 nights in Dec 2024

10/10 Excellent

Brent

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

8/10 Good

Yebin

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

Solid choice in Kauai!

Great ocean view and super close access to the beach! Very clean and quiet room!
Stayed 3 nights in Dec 2024

10/10 Excellent

Bev

Liked: Cleanliness, staff & service, property conditions & facilities
Right on the ocean. Grab and go breakfast a bonus. Friendly staff.
Stayed 3 nights in Jan 2025

8/10 Good

Frederic

Liked: Cleanliness, amenities, property conditions & facilities
Morning yoga was a lovely touch
Stayed 4 nights in Jan 2025

10/10 Excellent

MA LAURA ISABEL

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
II had a great stay! I didn't realize that my room was above the restaurant that features a band, which I think is amazing. I really enjoyed the music. Additionally, Stacey at the front desk was very kind and helped me print something without hesitation.
Stayed 4 nights in Feb 2025

10/10 Excellent

Ynmar

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Very good place near the airport
Stayed 5 nights in Aug 2024