Skip to Main Content.
List your propertySupportTrips
Member discount illustration

Members save 10% or more on over 100,000 hotels worldwide when you’re signed in

Sign in
Learn about Expedia Rewards
Feedback

The ISO by Castle

3.5 star property
Beachfront, with outdoor pool

Choose dates to view prices

Photo gallery for The ISO by Castle

Outdoor pool
One Bedroom Ocean View (2nd Floor, stair access only) | Living room
Beach House Suite (2nd floor, stair access only) | Beach/ocean view
Beach House Suite (2nd floor, stair access only) | Balcony view
One Bedroom Ocean View (2nd Floor, stair access only) | Private kitchenette
Travelers find their rhythm at The ISO by Castle, where the white sand beach extends the resort. Snorkeling is at guests' doorstep, the outdoor pool offers a refreshing alternative, bike rentals ease coastal exploration, and the water dispenser keeps everyone hydrated.

Reviews

8.4 out of 10
Very good

Popular amenities

  • Bar
  • Air conditioning
The current price is NZ$487
includes taxes & fees
12 Oct - 13 Oct

Room options

Check availability for these dates

Tonight

Sept 17 - Sept 18
Check availability for tonight Sept 17 - Sept 18

Tomorrow

Sept 18 - Sept 19
Check availability for tomorrow Sept 18 - Sept 19
Available filters for rooms
Showing 7 of 7 rooms

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

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

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

7.8 out of 10
Good
(30 reviews)

Highlights

Balcony
Air conditioning
Free cots/infant beds
Fridge
Flat-screen TV
Blackout curtains
Separate bedroom
Ceiling fan
  • 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

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

7.8 out of 10
Good
(14 reviews)

Highlights

Balcony
Separate sitting area
Air conditioning
Free cots/infant beds
Fridge
Flat-screen TV
Blackout curtains
Separate bedroom
  • 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, 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
(5 reviews)

Highlights

Balcony
Air conditioning
Free cots/infant beds
Fridge
Flat-screen TV
Blackout curtains
Separate bedroom
Ceiling fan
  • 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, 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
(62 reviews)

Highlights

Balcony
Air conditioning
Free cots/infant beds
Fridge
Flat-screen TV
Blackout curtains
Separate bedroom
Ceiling fan
  • 27 sq m
  • Ocean view
  • Sleeps 3
  • 2 Double Beds OR 1 King Bed

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

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

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

10.0 out of 10
Exceptional
(1 review)

Highlights

Balcony
Separate dining area
Separate sitting area
Air conditioning
Free cots/infant beds
Kitchen
Fridge
Dishwasher
  • 59 sq m
  • 1 bedroom
  • Ocean view
  • Sleeps 4
  • 1 King Bed and 1 Queen Sofa Bed

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

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

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

9.0 out of 10
Wonderful
(2 reviews)

Highlights

Balcony
Separate dining area
Separate sitting area
Air conditioning
Free cots/infant beds
Kitchenette
Fridge
Flat-screen TV
  • 54 sq m
  • 1 bedroom
  • 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)

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

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

Highlights

Balcony
Air conditioning
Free cots/infant beds
Fridge
Flat-screen TV
Blackout curtains
Separate bedroom
Ceiling fan
  • 27 sq m
  • Ocean view
  • Sleeps 3
  • 1 King Bed
Mod logo
Sign in to view eligible discounts and perks. More rewards for more adventures!
Sign inSign up, it's free

About the area

Located on the beach, The ISO by Castle is in Waipouli, a neighbourhood in Kapaa. Holoholoku Heiau and Hikinaakala Heiau are local landmarks, and travellers looking to shop may want to visit Coconut Marketplace and Kapaa Shopping Center. Smith's Tropical Paradise and Lydgate Beach are also worth visiting. Spend some time exploring the area's activities, including golfing.
Visit our Kapaa travel guideOpens in a new window
View more Resorts in KapaaOpens in a new window
Map
4-796 Kuhio Hwy, Kapaa, HI, 96746

What's nearby

  • Waipouli Beach - 3 min walk - 0.3 km
  • Coconut Marketplace - 14 min walk - 1.2 km
  • Lae Nani Beach - 3 min drive - 1.5 km
  • Kapa'a Beach Park - 4 min drive - 2.6 km
  • Smith's Tropical Paradise - 6 min drive - 3.0 km

Getting around

  • Lihue, HI (LIH) - 14 min drive

Restaurants

  • ‪McDonald's - ‬4 min walk
  • ‪Starbucks - ‬6 min walk
  • ‪JoJo’s Shave Ice - ‬15 min walk
  • ‪Tropical Dreams Hawaiian Gourmet Ice Cream - ‬7 min walk
  • ‪Sensei Sushi Bar And Grill - ‬14 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 snorkelling.
Other perks at this resort include:
  • An outdoor pool
  • Bike hire, a water dispenser and smoke-free property
  • Guest reviews speak highly of the beach locale, pool and helpful staff
Room features
All 78 rooms feature comforts such as laptop-friendly workspaces and air conditioning, as well as thoughtful touches such as high-speed Internet. Guest reviews speak positively of the cleanliness rooms at the property.
More conveniences in all rooms include:
  • Bathrooms with shower/bath combinations and free toiletries
  • 42-inch flat-screen TVs with cable channels
  • Wardrobes/cupboards, balconies and fridges

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

Pets not allowed

Children and extra beds

Children are welcome
Rollaway/extra beds are not available.

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 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

We should mention

This property does not have any lifts
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.

How much does it cost to stay at The ISO by Castle?

As of 17 Sept 2025, prices found for a 1-night stay for 2 adults at The ISO by Castle on 12 Oct 2025 start from NZ$428.39, including taxes and fees. This price is based on the lowest nightly price found in the last 24 hours for stays in the next 30 days. Prices are subject to change. Choose your dates for more accurate prices.

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?

Checkout is at 11 AM. Late checkout 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 mile (2 km).

Have a question?

AI iconBeta

Get instant answers with AI powered search of property information and reviews.

Reviews

The ISO by Castle Reviews

8.4

Very good

8.8

Cleanliness

8.8

Location

8.4

Staff & service

8.4

Eco-friendliness

8.2

Property conditions & facilities
Rating 10 - Excellent. 475 out of 1003 reviews
Rating 8 - Good. 336 out of 1003 reviews
Rating 6 - Okay. 121 out of 1003 reviews
Rating 4 - Poor. 41 out of 1003 reviews
Rating 2 - Terrible. 30 out of 1003 reviews

Reviews

8/10 Good

Danna

Liked: Cleanliness, property conditions & facilities
Nice place to stay that is a quick walk or drive to several other areas.
Stayed 6 nights in Aug 2025

10/10 Excellent

Siham

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Amazing
Stayed 3 nights in Aug 2025

10/10 Excellent

Codey

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Excellent location very nice staff , our ac unit was faulty However with it only being a 2 night stay it wasn’t worth the hassle, they were extremely friendly I’m sure if I pushed the issue they would have dug into it, also was fully booked
Stayed 2 nights in Aug 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

Ying

Liked: Cleanliness, staff & service, property conditions & facilities
Very good location, easy to get food from Safeway and
Stayed 7 nights in Aug 2025

6/10 Okay

christi

Liked: Cleanliness, staff & service, amenities
Disliked: Property conditions & facilities
Na
Stayed 7 nights in Aug 2025

10/10 Excellent

James

Liked: Cleanliness, staff & service, property conditions & facilities
Good but the restaurant attached was not the best
Stayed 3 nights in Aug 2025

8/10 Good

Inessa

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
closwe3d to conference
Stayed 6 nights in Aug 2025

2/10 Terrible

Judy B

Disliked: Cleanliness, staff & service, property conditions & facilities
The view was okay and also the pool. We only stayed 2 nights instead of 4 nights we moved to another hotel nearby ,the room smells bad & carpet very old ,need renovation ,no bar no restaurant because they’re under renovation. The front lobby was also not nice .I m not recommending to stay in this hotel .
Stayed 4 nights in Sep 2025

8/10 Good

Donna

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

8/10 Good

CHUNMEI XIE VAN

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

10/10 Excellent

Catherine Clare

Liked: Amenities
The rooms were clean but the property is run down in a few areas. Customer service was good but one of the ladies at check didn’t appear to like her job. I don’t have her name but she was the middle aged blond lady. Everyone else was wonderful.
Stayed 3 nights in Aug 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

6/10 Okay

Al

Liked: Cleanliness, staff & service, amenities
I like the property it’s close to a beach and nice views and if you want, you could just swim in the pool. Too bad there wasn’t a jacuzzi, but it wasn’t a deal breaker. The room was okay, the bed was comfortable and the room was clean. The restaurant on premises was great! The hotel was close to shopping and places to eat. All in all, it was a great place to stay!
Stayed 2 nights in Jul 2025

8/10 Good

Andrea

Liked: Cleanliness, staff & service, property conditions & facilities
We only stayed here a short time, but the rooms were clean and functional. The pool is nice for lounging. You can get free bikes in the lobby; the hotel is near Ke Ala Hele Makalae Path, so it is really easy to go for a bike ride along the coast with your family. The hotel has a sea wall so you can't get into the ocean right in front of the hotel, but you can access the beach and walk on the sand at the two neighboring resorts.
Stayed 2 nights in Aug 2025

10/10 Excellent

DWARAKESH

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

10/10 Excellent

Steve

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

Brian

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

Celina

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

6/10 Okay

Madison

Disliked: Amenities
Beware, there is NO elevators.
Stayed 4 nights in Aug 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

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

Marcus

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

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

8/10 Good

Rachel

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Overall a positive experience! Comfortable room with beautiful ocean view. Plenty of space for two people, comfortable bed, and we had everything we needed. The area is a bit more commercial but that does come with the convenience of grocery stores and tons of restaurant options. Only downsides were that we were unable to drop off our luggage early and there was somewhat of a mildew smell and mold in the bathroom. Unfortunately this is fairly common is ocean side hotels so not a deal breaker.
Stayed 2 nights in Jul 2025