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The ISO by Castle

3.5 star property

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Photo gallery for The ISO by Castle

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

Reviews

8.4 out of 10
Very good

Popular amenities

  • Bar
  • Air conditioning

Explore the area

Map
4-796 Kuhio Hwy, Kapaa, HI, 96746
  • Coconut Marketplace
    ‪16 min walk‬
  • Lae Nani Beach
    ‪3 min drive‬
  • Lydgate Beach
    ‪6 min drive‬
  • Lihue, HI (LIH)
    ‪14 min drive‬

Room options

View all photos for Ocean Front View (1st - 3rd Upper Floors)

Laptop workspace, blackout curtains, Internet, bed sheets

Ocean Front View (1st - 3rd Upper Floors)

  • Ocean view
  • 27 sq m
  • 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) | Laptop workspace, blackout curtains, Internet, bed sheets

Ocean View Deluxe Room (2nd Floor)

  • Ocean view
  • 27 sq m
  • 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)

  • Partial ocean view
  • 27 sq m
  • 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 curtains, Internet, bed sheets

Ocean View (1st - 3rd Upper Floors)

  • Ocean view
  • 27 sq m
  • 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)

  • Ocean view
  • 59 sq m
  • 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)

  • Ocean view
  • 54 sq m
  • 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 curtains, Internet, bed sheets

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

  • Ocean view
  • 27 sq m
  • Sleeps 3
  • 1 King Bed

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About this property

The ISO by Castle

Beachfront, with outdoor pool
At The ISO by Castle, relax by an outdoor pool or hit the beach where you can enjoy snorkelling.
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.
Recreational amenities at the resort include an outdoor pool.

The recreational activities listed below are available either on-site or nearby; fees may apply.

Our customers tell us that they can't get enough of the pool at The ISO by Castle. During your stay, you'll be within walking distance of Waipouli Beach. You'll find features such as an outdoor pool, a restaurant and a bar.
  • Enjoy local cuisine and a beachfront location while dining at The Bullshed Restaurant
  • Take a swim in the outdoor pool
  • Amenities include a water dispenser
  • On-site recreation includes yoga classes and bicycles to rent
  • Guests have great things to say about the pool and the clean guestrooms
  • 10 minutes on foot from Waipouli Beach and a 2-minute drive from Coconut Marketplace
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.

The Bullshed Restaurant – This beachfront restaurant specialises in local cuisine and only serves dinner. Guests can enjoy drinks at the bar.

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
  • 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 at the property

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

This property is managed by a professional host. The provision of housing is linked to their trade, business or profession.
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
The front desk at this property is open daily from 7:00 AM - 10:00 PM.
Front desk staff will greet guests on arrival at the property.

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

The ISO by Castle Reviews

Reviews

8.4

Very good

Rating 10 - Excellent. 470 out of 1000 reviews
Rating 8 - Good. 346 out of 1000 reviews
Rating 6 - Okay. 115 out of 1000 reviews
Rating 4 - Poor. 40 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

4/10 Poor

Stephanie

Liked: Cleanliness, staff & service
Disliked: Property conditions & facilities, room comfort

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?
Stayed 5 nights in Feb 2025

2/10 Terrible

Rebekah

Stayed 2 nights in Feb 2025

10/10 Excellent

Catherine R

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 8 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

Cathy

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

Great place to stay in Kauai

Our stay at ISO exceeded our expectations! We had a great room with a balcony facing the ocean. The room was clean and comfortable came with a bar fridge and coffee maker. They also provided complimentary continental breakfast, bikes are also available FREE of charge. While we were there they only had 4 bikes available so you had to get there at the right time. The day we left though they just got a bunch of new bikes. Wonderful restaurant on site, great pool and even a gas fireplace that is lit nightly. What a nice touch is that they even give each guest a reusable water bottle and they have free water cooler and ice machine to refill. Highly recommend this hotel!!!! We were even lucky to have a monk seal hang out on our beach for 3 days!!!!! Absolutely Love Kauai 💕💕💕
Stayed 5 nights in Jan 2025

8/10 Good

Robert

Travelled with family
Liked: Room comfort

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.
Stayed 5 nights in Feb 2025

10/10 Excellent

Laurie

Travelled with partner
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

2/10 Terrible

Darius

Travelled with partner
Disliked: Cleanliness, staff & service, amenities, property conditions & facilities
In 5 nights of stay room wasn’t cleaned once.
Stayed 5 nights in Jan 2025

6/10 Okay

Jordan

Travelled with family
Not so clean out dated room good location
Stayed 5 nights in Jan 2025

10/10 Excellent

Jenna

Stayed 4 nights in Jan 2025

10/10 Excellent

Claude

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

6/10 Okay

Ross

Travelled with partner
Liked: Cleanliness, staff & service
unheated pool, dead hook up for charger, bad coffee, screen door didn't slide, irritating coffee maker, hard pillows, trashcan too small,
Stayed 5 nights in Jan 2025

10/10 Excellent

Sara

Travelled with family
Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Stayed 2 nights in Jan 2025

8/10 Good

Elise, Cliffside Park

Travelled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Love the ISO. Affordable and nice. Love the bike rentals and the Kapaa coastline.
Stayed 3 nights in Jan 2025

10/10 Excellent

Denise

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

10/10 Excellent

Ellen

Travelled with family
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

Jose

Travelled with family, Travelled with family and small children
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Stayed 5 nights in Jan 2025

8/10 Good

Linda

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 7 nights in Jan 2025

10/10 Excellent

Eunice

Travelled with family
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Very happy with our stay at The ISO —especially the free bike rentals, morning yoga and other amenities. 10/10 would recommend
Stayed 4 nights in Jan 2025

8/10 Good

Frederic

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

10/10 Excellent

Bev

Travelled with partner
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

10/10 Excellent

Jonathan

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 4 nights in Jan 2025

10/10 Excellent

Sayyid

Travelled with family
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Please Change the coffee maker in each room. It's too old and needs a new one. All other amenities and location were awesome.
Stayed 3 nights in Dec 2024

4/10 Poor

Steven

Disliked: Staff & service
No turn down service
Stayed 9 nights in Dec 2024

10/10 Excellent

Alexi

Travelled with partner
Liked: Staff & service, property conditions & facilities
We had an amazing stay at this property.
Stayed 4 nights in Dec 2024