See all properties

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
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

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

Located in Waipouli within a short walk of Waipouli Beach, The ISO by Castle is within a mile (2 km) of Coconut Marketplace. This 78-room, 3.5-star resort welcomes guests with conveniences like a restaurant, a bar/lounge, and an outdoor pool.
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

Beachfront, with outdoor pool
Guests staying at The ISO by Castle can enjoy an outdoor pool, a garden, and a water dispenser. Staff members can help with accommodation requests, and provide front-desk service during limited hours.
Guests can expect to find 42-inch flat-screen TVs with cable channels. Balconies, refrigerators, and coffee makers are other standard amenities.
Recreational amenities at the resort include an outdoor pool.

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

Similar properties

Balcony
Aston Islander on the Beach
  • Pool
  • Restaurant
  • Air conditioning
  • Bar
8.6 out of 10, Excellent, 1,009 reviews
$236 nightly
The price is $281
Jan 4 - Jan 5
Total with taxes and fees
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
  • Snorkeling
  • Yoga classes

Family friendly

  • In-room refrigerator
  • Outdoor pool

Conveniences

  • Limited-hour front desk
  • Water dispenser

Outdoors

  • Garden
  • On the beach

Accessibility

  • No elevator

More

  • 3 floors
  • 5 buildings
  • Smoking not allowed
  • 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
Information provided by the property may be translated using automated translation tools

Access methods

Front desk (limited hours)

Pets

  • This property doesn't allow pets

Property payment types

Important information

Fees

You'll be asked to pay these 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

These are all of the charges provided to us by the property.

Optional extras

These fees and deposits will be charged at check-in, check-out, or the time of service.

  • Late check-out is available for a fee (subject to availability)

This list may not be comprehensive. Fees and deposits might 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, 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
  • Check-in: 3:00 PM
  • Check-out: 11 AM
  • Minimum check-in age: 18
The front desk is available during limited hours.

We should mention

Details about charges, deposits, or other important information:

  • 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.
  • Charges for extra guests may apply and vary depending on the property's policy.
  • A cash deposit, credit card, or debit card for incidental charges, as well as a government-issued photo ID, may be required at check-in.
  • Special requests are subject to availability at the time of check-in and can't be guaranteed. Certain requests may come with additional charges.
  • Tax ID number is W-34434930-01.
  • This property accepts credit cards and debit cards. Cash is not accepted. 
  • Onsite safety features include a smoke detector.

Additional information about polices, regulations, and more:

  • Registered guests are the only ones allowed in guestrooms.
  • There are no elevators.
  • No rollaway or extra beds are available.

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

Is a free cancellation option available at The ISO by Castle?

The ISO by Castle offers free cancellation on certain room rates. If you'd like to learn more, look at the cancellation policy on our site.

What can I see near The ISO by Castle?

This resort is situated in Waipouli within a short 10-minute walk of Waipouli Beach and also 16 minutes on foot from Coconut Marketplace. You'll also find Fuji Beach and Lae Nani Beach within a short drive.

Is parking available on site at The ISO by Castle?

No, this resort doesn't offer parking.

Does The ISO by Castle include a casino on the premises?

No, The ISO by Castle doesn't have a casino.

Is there an indoor pool at The ISO by Castle?

No, this resort doesn't have an indoor pool; however, there is an outdoor pool.

What do couples enjoy most about The ISO by Castle?

This beachfront resort offers plenty of amenities for couples including an outdoor pool, a bar, and a beachfront restaurant.

Does The ISO by Castle have a hot tub?

No, this resort doesn't have a spa tub.

Does The ISO by Castle feature a restaurant that includes a breakfast menu?

No, The ISO by Castle doesn't have a restaurant that serves breakfast.

Does The ISO by Castle allow pets to stay for free?

No, pets aren't allowed at The ISO by Castle.

Are there connecting rooms at The ISO by Castle?

No, this resort doesn't feature connecting guestrooms.

Where is the closest airport to The ISO by Castle?

The closest major airport to The ISO by Castle is Lihue Airport (LIH), which is 7 mi away (14 minutes by car).

Are there rooms with balconies at The ISO by Castle?

Yes, every guestroom at The ISO by Castle comes with a balcony with some featuring ocean views.

The ISO by Castle Reviews

Reviews

8.4

Very Good

Rating 10 - Excellent. 482 out of 1003 reviews
Rating 8 - Good. 324 out of 1003 reviews
Rating 6 - Okay. 123 out of 1003 reviews
Rating 4 - Poor. 42 out of 1003 reviews
Rating 2 - Terrible. 32 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

10/10 Excellent

Angel

Traveled with family
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Loved the ocean view from my room. The room was clean and staff was super friendly and helpful to all my questions. Most importantly to me was that the walls were thick or insulated enough that i couldn't hear any of the adjacent neighbors through them.
Stayed 3 nights in Sep 2025

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