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The ISO by Castle

3.5 star property
Beachfront resort in Kapaa with outdoor pool and restaurant

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Photo gallery for The ISO by Castle

Outdoor pool
Beach House Suite (2nd floor, stair access only) | Balcony view
Beach House Suite (2nd floor, stair access only) | Beach/ocean view
One Bedroom Ocean View (2nd Floor, stair access only) | Private kitchenette | Fridge, coffee/tea maker
One Bedroom Ocean View (2nd Floor, stair access only) | Living room | 42-inch flat-screen TV with cable channels, TV
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

8.4 out of 10
Very good

Popular amenities

  • Bar
  • Air conditioning
  • Pool
  • Non-smoking
  • Restaurant

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
$288 nightly
The total price is $340
Oct 1 - Oct 2
Total with taxes and fees

Room options

Check availability for these dates

Tonight

Sep 5 - Sep 6
Check availability for tonight Sep 5 - Sep 6

Tomorrow

Sep 6 - Sep 7
Check availability for tomorrow Sep 6 - Sep 7
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) | 1 bedroom, laptop workspace, blackout drapes, Internet

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

7.8 out of 10
Good
(30 reviews)

Highlights

Balcony
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Blackout drapes/curtains
Separate bedroom
Ceiling fan
  • 290 sq ft
  • 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 | 42-inch flat-screen TV with cable channels, TV

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 cribs/infant beds
Refrigerator
Flat-screen TV
Blackout drapes/curtains
Separate bedroom
  • 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, 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 cribs/infant beds
Refrigerator
Flat-screen TV
Blackout drapes/curtains
Separate bedroom
Ceiling fan
  • 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, stair access only

1 bedroom, laptop workspace, blackout drapes, Internet

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

8.6 out of 10
Excellent
(62 reviews)

Highlights

Balcony
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Blackout drapes/curtains
Separate bedroom
Ceiling fan
  • 290 sq ft
  • 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 | 42-inch flat-screen TV with cable channels, TV

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 cribs/infant beds
Kitchen
Refrigerator
Dishwasher
  • 640 sq ft
  • 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 | Fridge, coffee/tea maker

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 cribs/infant beds
Kitchenette
Refrigerator
Flat-screen TV
  • 580 sq ft
  • 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) | 1 bedroom, laptop workspace, blackout drapes, Internet

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

Highlights

Balcony
Air conditioning
Free cribs/infant beds
Refrigerator
Flat-screen TV
Blackout drapes/curtains
Separate bedroom
Ceiling fan
  • 290 sq ft
  • Ocean view
  • Sleeps 3
  • 1 King Bed

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  • Air conditioning
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8.6 out of 10, Excellent, 1,008 reviews
$185 nightly
The price is $218
Oct 5 - Oct 6
Total with taxes and fees
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About the neighborhood

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 Airport (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

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.

At a glance

DONE

Hotel size

    • 78 units
    • Arranged over 3 floors
DONE

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
DONE

Special check-in instructions

    • The front desk is open daily from 7:00 AM - 10:00 PM
    • Front desk staffed during limited hours
DONE

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
DONE

Pets

    • Pets not allowed
DONE

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

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.
Only registered guests are allowed in the guestrooms.
This property does not have elevators.
Guests can rest easy knowing there's a smoke detector on site.
This property accepts credit cards and debit cards. Cash is not accepted.
Credit cards accepted: Visa, Mastercard, American Express, Discover
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

8.8/10

Cleanliness

8.4/10

Staff & service

8.0/10

Amenities

8.2/10

Property conditions & facilities

8.4/10

Eco-friendliness

Popular mentions

Room
Service staff
Location
View
Ocean
Restaurant
Breakfast
Beach
Ocean view
Lobby

What guests liked

  • The property's beach location offers stunning ocean views, direct access, and a serene atmosphere. (40 reviews)
AI Sparkle IconFrom real guest reviews summarized by AI.

Reviews

8/10 Very good

Great location nice restaurant attached to Hotel. No beach for swimming though but very nice location on the water. Nice pool very quiet location.
Paul, 2-night trip

10/10 Exceptional

Had a lot of amenities like a nice grab and go breakfast as well as bikes you could rent out. They also did morning yoga and had a great pool.
Kiarah, 2-night trip

10/10 Exceptional

amazing view nice hotel
Irvin, 4-night trip

10/10 Exceptional

Our stay was great! The ISO is in a great location within walking distance to several beaches and food options.
Kyle, 2-night trip

8/10 Very good

Older establishment but very clean, great view and good restaurant nearby. Only couple of blocks from coconut market. Gave you privacy only tidied your room upon request. Affordable.
View from our room.
Cynthia, 7-night trip

6/10 Good

Great location but dated.

The pros: great location - could not be closer to the ocean. Sound of the waves at night was awesome. Friendly staff and nice paths to walk. Cons: dated rooms with a musty smell. Not much space and the outside needed some updates. Parking is cramped.
Elizabeth, 4-night trip

10/10 Exceptional

Great location, friendly staff, good amenities
Celina, 4-night trip

10/10 Exceptional

Property is a good location very Central

Staff is extremely friendly & knowledgeable one AC did not work & second room. AC was adequate, but could’ve been a little colder. property was in good shape
Wallace, 7-night trip

10/10 Exceptional

Quiet, serene and conveniently located.
Natania Delfin, 3-night trip

8/10 Very good

Decent location, very clean rooms and property. Great walking path along the beach and hotels.
Alexandra, 7-night trip

10/10 Exceptional

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
sophia, 1-night trip

8/10 Very good

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.
Maitland E, 8-night trip

10/10 Exceptional

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!
Serine, 7-night trip

8/10 Very good

Nice

Pleasant stay. Clean and comfortable. Staff was excellent, very accomodating. Beautiful ocean view.
Anita, 1-night trip

10/10 Exceptional

Great views. Great vibes
Andreanna, 1-night trip

6/10 Good

Location good hotel very average

Somewhat remodeled hotel, not a resort. Do not bring your kids no beach and beach swimming. Located on water but unable to swim due to rocks and break. AC needs upgrade and was there for three days and was offered no housekeeping service. Was handed towels and they never came to room to ask if I needed service. Very very poorly done. For the price I would look at other options.
Paul, 1-night trip

8/10 Very good

Hotel was nice but a little outdated room was clean liked the grab n go breakfast good location
Laurie, 5-night trip

8/10 Very good

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.
Mark, 6-night trip

10/10 Exceptional

Great place
Kevin, 4-night trip

10/10 Exceptional

This was a delightful hotel with a lovely swimming pool and beautiful lawn on which we could relax and look at the ocean.
Ellen, 3-night trip

10/10 Exceptional

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.
C Kim, 2-night trip

10/10 Exceptional

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.
Anthony, 5-night trip

10/10 Exceptional

Staff super friendly and the breakfast super convenient saves you aome bucks
Hugo, 6-night trip

10/10 Exceptional

Great location and property. AC was a little finicky but overall worth the stay for the price, and the view!
Andrew, 3-night trip

10/10 Exceptional

Staff was so accommodating and helpful. Rooms need updating but property is located on the ocean with awesome views/waves. Shopping/restaurants nearby.
Laurie, 2-night trip