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The ISO by Castle

3.5 star property
3.5-star beachfront resort with outdoor pool

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Photo gallery for The ISO by Castle

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

Reviews

8.4 out of 10
Very good

Popular amenities

  • Air conditioning
  • Bar

Explore the area

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

Room options

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

Laptop workspace, blackout drapes, Internet, bed sheets

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

8.6 out of 10
Excellent
(64 reviews)
  • 290 sq ft
  • Ocean view
  • Sleeps 3
  • 2 Double Beds OR 1 King Bed

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

Ocean Front View (1st - 3rd Upper Floors, stair access only) | Laptop workspace, blackout drapes, Internet, bed sheets

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

7.8 out of 10
Good
(30 reviews)
  • 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)
  • 290 sq ft
  • Ocean view
  • Sleeps 4
  • 1 King Bed and 1 Double Sofa Bed OR 2 Double Beds

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)

  • 580 sq ft
  • 1 bedroom
  • Ocean view
  • Sleeps 4
  • 1 King Bed and 1 Double Sofa 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)
  • 640 sq ft
  • 1 bedroom
  • Ocean view
  • Sleeps 4
  • 1 King Bed and 1 Queen Sofa Bed

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)

9.2 out of 10
Wonderful
(9 reviews)
  • 290 sq ft
  • Partial ocean view
  • Sleeps 3
  • 2 Double Beds OR 1 King 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) | Laptop workspace, blackout drapes, Internet, bed sheets

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

10.0 out of 10
Exceptional
(1 review)
  • 290 sq ft
  • Ocean view
  • Sleeps 3
  • 1 King Bed

Beach House Suite (2nd Floor, Stair Access Only)

  • Sleeps 4

One Bedroom Ocean View (2nd Floor, Stair Access Only)

  • Sleeps 4

Premium Ocean Front View (1st-3rd Upper Floors, Stair Access Only)

  • Sleeps 2

Run Of House

  • Sleeps 2

Partial Ocean Pool View 1st-2nd Floor

  • Sleeps 3

Ocean Front Room

  • Sleeps 3

Ocean View Room

  • Sleeps 3

Deluxe Ocean View

  • Sleeps 4

About the neighborhood

Kapaa

On the beach.With a stay at this Waipouli resort, you'll be within half a mile (1 km) of Waipouli Beach and 2 miles (3 km) of Coconut Marketplace. Fuji Beach and Kapaa Shopping Center are also within 2 miles (3 km).
View more Resorts in KapaaOpens in a new window

What's nearby

  • Waipouli Beach - 3 min walk - 0.2 miles
  • Coconut Marketplace - 14 min walk - 0.7 miles
  • Fuji Beach - 15 min walk - 0.8 miles
  • Lae Nani Beach - 3 min drive - 1.0 mile
  • Wailua Beach - 3 min drive - 1.2 miles

Getting around

  • Lihue Airport (LIH) - 14 min drive

Restaurants

  • ‪McDonald's - ‬4 min walk
  • ‪Starbucks - ‬6 min walk
  • ‪Waipouli Deli & Restaurant - ‬3 min walk
  • ‪Sensei Sushi Bar And Grill - ‬14 min walk
  • ‪Taco Bell - ‬8 min walk

About this property

The ISO by Castle

3.5-star beachfront resort 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 complimentary toiletries and ceiling fans. Rooms open to balconies. 42-inch flat-screen televisions come with cable channels. Guests can make use of the in-room refrigerators and coffee/tea makers. Bathrooms include shower/tub combinations.

Similar properties

Balcony
Aston Islander on the Beach
  • Pool
  • Restaurant
  • Air conditioning
  • Bar
4.3 out of 5, Excellent, 1,011 reviews
$236 nightly
The price is $281
Jan 4 - Jan 5, 2026
Total with taxes and fees
Aston Islander on the Beach

Property amenities

Family friendly

  • In-room refrigerator
  • Outdoor pool

Internet

  • Available in all rooms: High-speed internet

Food and drink

  • A bar/lounge
  • A restaurant

Things to do

  • Bicycle rentals
  • Outdoor pool
  • Snorkeling
  • Yoga classes

Accessibility

  • No elevator

Room amenities

Entertainment

  • 42-inch flat-screen TV with cable channels

Bedroom

  • Bedsheets provided
  • Blackout drapes

Bathroom

  • Free toiletries
  • Private bathroom
  • Shower/bathtub combination
  • Towels provided

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
Information provided by the property may be translated using automated translation tools

Access methods

Front desk (limited hours)

Pets

  • No pets allowed

Children and extra beds

  • Children are welcome.
  • Rollaway/extra beds are not available.

Property 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

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, 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
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, 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. 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 each 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

How close is The ISO by Castle to the airport?

The ISO by Castle is 7 mi (14-min drive) away from the Lihue Airport (LIH) airport, the closest popular airport to the property.

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

As of Dec 27, 2025, prices found for a 1-night stay for 2 adults at The ISO by Castle on Jan 26, 2026 start from $228.49, excluding 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.

Does The ISO by Castle have an airport shuttle?

Airport shuttle services are not available at The ISO by Castle.

How close is The ISO by Castle to the beach?

This resort is on the beach. Don't forget your sunscreen!

Does The ISO by Castle offer free breakfast?

The ISO by Castle does not offer free breakfast.

Is there a casino at The ISO by Castle?

No, there is no casino at this resort.

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

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

Is there free parking at The ISO by Castle?

Free parking is not available at this resort.

Does The ISO by Castle have a pool?

The ISO by Castle features an outdoor pool.

Does The ISO by Castle have a restaurant?

The ISO by Castle is home to The Bullshed Restaurant, which features local cuisine and a beachfront location.

Does The ISO by Castle have a spa?

There are no spa services available at this resort.

How close is The ISO by Castle to downtown Kapaa?

The ISO by Castle is 1.2 mi away from Wailua.

The ISO by Castle Reviews

Reviews

8.4

Very Good

Rating 10 - Excellent. 481 out of 1001 reviews
Rating 8 - Good. 324 out of 1001 reviews
Rating 6 - Okay. 123 out of 1001 reviews
Rating 4 - Poor. 41 out of 1001 reviews
Rating 2 - Terrible. 32 out of 1001 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

10/10 Excellent

Christine

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

10/10 Excellent

Hallei

Traveled with family
Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
It's a great hotel, near the airport and the main road to go anywhere in Kauai. I will definitely stay there again.
Stayed 4 nights in Sep 2025

10/10 Excellent

Carolyn, Eagle Rock

Liked: Cleanliness, staff & service, property conditions & facilities
Always love coming here. Disappointed that the restaurant was under construction. Beautiful sunrises. Helpful staff.
Stayed 6 nights in Sep 2025

10/10 Excellent

Samantha

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Loved this place. We enjoyed our room, staff was always nice and friendly. Loved being able to check the bikes out. For the price for the ocean view, you can’t beat it. Would definitely stay here again!
Stayed 6 nights in Sep 2025

10/10 Excellent

tracy

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 5 nights in Sep 2025

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

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

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

10/10 Excellent

Catherine Clare

Traveled with family
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

6/10 Okay

christi

Traveled with partner
Liked: Cleanliness, staff & service, amenities
Disliked: Property conditions & facilities
Na
Stayed 7 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

Melanie

Stayed 7 nights in Aug 2025

10/10 Excellent

Kevin

Stayed 2 nights in Aug 2025

8/10 Good

Inessa

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

8/10 Good

Rachel

Stayed 4 nights in Aug 2025

6/10 Okay

Madison

Traveled with family
Disliked: Amenities
Beware, there is NO elevators.
Stayed 4 nights in Aug 2025

8/10 Good

Ying, Ellensburg

Liked: Cleanliness, staff & service, property conditions & facilities
Very good location, easy to get food from Safeway and
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

6/10 Okay

Marion

Liked: Cleanliness, room comfort

Correct pour le prix, bien placé + parking gratuit

Nous étions au rez-de-chaussée avec une vue sur la piscine. Le petit déjeuner, n'était pas du tout ce quoi nous nous attendions, muffin, lait au chocolat en briquette. Le café/thé devait se faire directement dans la chambre. La chambre en elle-même était correct. Mais nous étions vraiment bien placé et point bonus le parking était gratuit.
Stayed 4 nights in Jul 2025

10/10 Excellent

Samantha

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Really loved views of the ocean suite, nice grounds & beach next door was never busy. As others mentioned, our King reservation was not guaranteed so we almost ended up in a double. Be sure to call ahead & confirm what you expect. No coffee in the lobby available, not even during the grab & go breakfast. Small in-room pot only. Nice perks of sunrise yoga, and having bikes for use as long as one is available that is your size since the seats don't adjust. East parking. Great spot to explore Kauai by car, would stay here again!
Stayed 4 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

6/10 Okay

Elizabeth

Traveled with family
Liked: Staff & service
Disliked: Cleanliness, property conditions & facilities, room comfort

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.
Stayed 4 nights in Jul 2025

6/10 Okay

Jodie, Los Angeles

Traveled with group, Traveled with partner
Liked: Cleanliness, staff & service
Pros: Overlooking the beach. We had a pretty nice view for a decent price. There’s breakfast but it’s just cereal, muffins, apples .. can’t complain since it’s free but wish there were more options. Cons: AC wasn’t blowing cold at all. Checked into a very warm room. Outdated bathroom. Walk-up building only. Uncovered parking. FYI: Very low ceiling / ceiling fan so taller people have to be careful. Our friend whacked his hand pretty hard on it just stretching lol.
Stayed 3 nights in Jul 2025

4/10 Poor

Rommel

Traveled with partner
Disliked: Cleanliness, staff & service, amenities, property conditions & facilities
Very nice location which is walking distance to good reasonable food. Property is very outdated. Not sure why they are called a “resort”. I think it is a stretch in able to ask for the resort fee. Nothing fancy here. If your goal is just to sleep for the night, then it is fine. But if you are after going to the beach, then you are in the wrong place. The beach here is not where you can swim. It is just for the view.
Stayed 6 nights in Jul 2025

6/10 Okay

Brody David

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 6 nights in Jul 2025