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The ISO by Castle

3.5 star property
Beachfront, with outdoor pool

Photo gallery for The ISO by Castle

Outdoor pool
Beach House Suite (2nd floor, stair access only) | Balcony view
One Bedroom Ocean View (2nd Floor, stair access only) | Private kitchenette
One Bedroom Ocean View (2nd Floor, stair access only) | Living room
Beach House Suite (2nd floor, stair access only) | Beach/ocean view

Reviews

8.4 out of 10
Very good

Popular amenities

  • Bar
  • Air conditioning
  • Pool
  • Restaurant
The current price is AU$516
includes taxes & fees
2 Oct - 3 Oct

Explore the area

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

Room options

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

About the area

Kapaa

At The ISO by Castle you'll be within a 20-minute stroll of Waipouli Beach and Coconut Marketplace. Highlights at this beachfront resort include a restaurant, an outdoor swimming pool and a bar/lounge. .The restaurant, The Bullshed Restaurant, serves local cuisine and is open for dinner. Spend the day at the beach where you'll find snorkelling. Additionally, you'll find a garden and a water dispenser. .With a stay at this 3.5-property class Waipouli resort, you'll be 13.8 km (8.5 mi) from Nawiliwili Harbor.
View more Resorts in KapaaOpens in a new window

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
  • ‪BV's Bourbon & Ale House - ‬16 min walk
  • ‪Burger King - ‬18 min walk
  • ‪JoJo’s Shave Ice - ‬15 min walk

About this property

The ISO by Castle

Beachfront, with outdoor pool
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.

  • 78 guestrooms or units
  • 3 levels
  • 5 buildings
  • Front desk (limited hours)
  • Garden
  • No smoking on site
  • Water dispenser
  • Bar or lounge
  • Dining venue
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.

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Balcony

Aston Islander on the Beach

  • Pool
  • Air conditioning
  • Bar
  • Laundry
4.3 out of 5, Excellent, 1,007 reviews
The price is AU$356
includes taxes & fees
23 Sept - 24 Sept
Aston Islander on the Beach

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

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

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
Charges for extra guests may apply and vary according to property policy.
A cash deposit, credit card or debit card for incidental charges and government-issued photo identification may be required upon check-in.
Special requests are subject to availability at the time of check-in. Special requests can't be guaranteed and may incur additional charges.
    This property is managed by a professional host. The provision of housing is linked to their trade, business or profession. 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 tax ID number is W-34434930-01. This property accepts Visa, Mastercard, American Express, Discover and debit cards. Cash is not accepted. For guests' safety, the property includes a smoke detector in all accommodation.

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

Frequently asked questions

What is the cancellation policy at The ISO by Castle?

The ISO by Castle offers free cancellation on select room rates. Check out the cancellation policy for more info.

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

As of 10 Sept 2025, prices found for a 1-night stay for 2 adults at The ISO by Castle on 2 Oct 2025 start from AU$462.19, 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.

Are there any beaches close to The ISO by Castle?

Yep, The ISO by Castle is a short 10-minute walk from Waipouli Beach. Fun beach activities include snorkelling.

Does The ISO by Castle have a pool?

Yep, and guests love it! The ISO by Castle has a pool.

What makes The ISO by Castle a romantic place to stay?

Beachfront dining and a lounge bar, as well as private balconies in the guestrooms, all help set the scene for a romantic weekend at The ISO by Castle.

Is there a free airport shuttle available at The ISO by Castle?

No, The ISO by Castle does not offer an airport shuttle service.

Is there a bar or restaurant at The ISO by Castle?

Yep, they've got a lounge bar and an onsite restaurant that serves local cuisine. Pre dinner cocktails anyone?

What time are check-in & check-out at The ISO by Castle?

Check-in begins at 3:00 PM. Check-out time is 11 AM.

Are pets allowed at The ISO by Castle?

No, pets are not allowed.

The ISO by Castle Reviews

Reviews

8.4

Very good

Rating 10 - Excellent. 476 out of 1003 reviews
Rating 8 - Good. 335 out of 1003 reviews
Rating 6 - Okay. 121 out of 1003 reviews
Rating 4 - Poor. 42 out of 1003 reviews
Rating 2 - Terrible. 29 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

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

Raymond, Bozeman

Stayed 1 night in May 2025

10/10 Excellent

Irvin

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
amazing view nice hotel
Stayed 4 nights in May 2025

10/10 Excellent

sophia

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
It was just what I needed. Cozy bed, ocean waves lull me to sleep, Bullshed great dinner and a hot shower. Awesome a R&R
Stayed 1 night in May 2025

10/10 Excellent

jeffrey

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

beautiful view

everything at the hotel was perfect , except the breakfast.Too much sugar items
Stayed 8 nights in May 2025

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

6/10 Okay

Stacie

Stayed 3 nights in May 2025

10/10 Excellent

Taysha

Stayed 2 nights in May 2025

8/10 Good

Steve

Stayed 4 nights in Apr 2025

10/10 Excellent

Diana

Liked: Amenities
Super friendly staff. Great view. Free bikes and yoga
Stayed 2 nights in May 2025

10/10 Excellent

Marjorie

Stayed 4 nights in Apr 2025

8/10 Good

Mark

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

Great service

Had some trouble with our room after the first night. They upgraded us to a new room with a better view! Grab and run cold breakfast was a great option! Restaurant is a little pricey but the food was excellent.
Stayed 6 nights in Apr 2025

10/10 Excellent

leyla

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

Verified traveller

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Stayed 2 nights in Apr 2025

10/10 Excellent

Serine

Travelled with family
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

4/10 Poor

RaLinda Rae

Stayed 7 nights in Jan 2025

8/10 Good

Nikola

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 1 night in Apr 2025

10/10 Excellent

Michael

Stayed 2 nights in Apr 2025

10/10 Excellent

Natania Delfin

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

10/10 Excellent

Linda

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Stayed 2 nights in Mar 2025

10/10 Excellent

Stephanie

Travelled with family
Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Stayed 1 night in Apr 2025

10/10 Excellent

Verified traveller

Travelled with family
Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Stayed 3 nights in Apr 2025

10/10 Excellent

Taysha

Stayed 3 nights in Apr 2025

8/10 Good

Anita

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

Nice

Pleasant stay. Clean and comfortable. Staff was excellent, very accomodating. Beautiful ocean view.
Stayed 1 night in Apr 2025