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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
Ocean View (1st - 3rd Upper Floors) | Laptop workspace, blackout drapes, Internet, bed sheets
Beach House Suite (2nd floor) | Balcony view
One Bedroom Ocean View (2nd Floor) | Living room | 42-inch flat-screen TV with cable channels, TV
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
    ‪14 min walk‬
  • Lae Nani Beach
    ‪3 min drive‬
  • Lydgate Beach
    ‪5 min drive‬
  • Lihue, HI (LIH)
    ‪15 min drive‬

Room options

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

Laptop workspace, blackout drapes, Internet, bed sheets

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

  • 290 sq ft
  • Ocean view
  • 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) | Living area | 42-inch flat-screen TV with cable channels, TV

Ocean View Deluxe Room (2nd Floor)

  • 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)

Partial Ocean/Pool View (1st - 2nd Upper Floors) | View from room

Partial Ocean/Pool View (1st - 2nd Upper Floors)

  • 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)

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

Ocean View (1st - 3rd Upper Floors)

  • 290 sq ft
  • Ocean view
  • 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)

  • 640 sq ft
  • Ocean view
  • 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)

  • 580 sq ft
  • 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) | Laptop workspace, blackout drapes, Internet, bed sheets

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

  • 290 sq ft
  • Ocean view
  • Sleeps 3
  • 1 King Bed

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
  • Lae Nani Beach - 3 min drive - 1.0 mile
  • Kapa'a Beach Park - 4 min drive - 1.7 miles
  • Lydgate Beach - 5 min drive - 1.9 miles

Getting around

  • Lihue Airport (LIH) - 14 min drive

Restaurants

  • ‪Island Country Markets #93 - ‬16 min walk
  • ‪Starbucks - ‬6 min walk
  • ‪Lava Lava Beach Club - Kauai - ‬3 min drive
  • ‪Tropical Dreams Hawaiian Gourmet Ice Cream - ‬7 min walk
  • ‪Burger King - ‬18 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.

Languages

English

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Outdoor pool

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  • Pool
  • Air conditioning
  • Bar
  • Laundry
4.3 out of 5, Excellent, 1,006 reviews
$235 nightly
The price is $277
Jun 4 - Jun 5
Total includes 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

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
  • 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, 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 Jun 3, 2025, prices found for a 1-night stay for 2 adults at The ISO by Castle on Jun 16, 2025 start from $272.49, 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. 474 out of 1003 reviews
Rating 8 - Good. 344 out of 1003 reviews
Rating 6 - Okay. 115 out of 1003 reviews
Rating 4 - Poor. 41 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

8.4/10

Property conditions & facilities

8.4/10

Eco-friendliness

Reviews

6/10 Okay

Jason

Stayed 4 nights in Feb 2025

8/10 Good

Carol

Business traveler
I would NOT eat at the Bull Shed restaurant. HORRIBLE. Nothing is fresh or good. stay away from this restaurant.
Stayed 1 night in Feb 2025

6/10 Okay

Effie

Traveled with partner
Liked: Cleanliness, staff & service
It was a property that could use some refurbishment. Of course it is overpriced, but everything is in Hawaii. The pool was clean and access to the property was convenient with a stoplight at the main intersection. Staff was very helpful. Breakfast was a joke. The coffee maker in the room didn’t make the coffee very hot, which was disappointing. Oh well. It was a decent place to stay. Not a high end resort. A place to sleep.
Stayed 10 nights in Feb 2025

10/10 Excellent

Carmen

Stayed 2 nights in Feb 2025

4/10 Poor

Pouya

Traveled with partner
Disliked: Staff & service, amenities, property conditions & facilities
The hotel has a few positives, starting with its peaceful atmosphere, great location, stunning views from the pool area, and a decent restaurant. However, that’s where the good points end. The rooms are outdated, with what’s advertised as an oceanfront view being only a partial ocean view. The staff are unwelcoming, the grab-and-go breakfast is disappointing, and the beds are extremely uncomfortable. While the rooms were clean, everything inside felt old and rusty, making it difficult to find anything positive to say about them. Overall, the hotel deserves five stars for its quiet and relaxing environment but zero stars for everything else, including the basic amenities expected from a hotel. If it were advertised as a motel, the rating might be more appropriate.
Stayed 6 nights in Feb 2025

10/10 Excellent

Lorna

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

Great property.

We really enjoyed our stay at the ISO. The hotel met our needs for our 4 night stay. It is centrally situated so it was easy to explore. Clean rooms, comfortable bed and super friendly staff. Good dinner restaurant on property. Good selection of continental breakfast foods. Amazing sunrises! We would stay again if we come back to Kauai.
Beautiful sunrises
Stayed 4 nights in Feb 2025

8/10 Good

Judy

Traveled with family
Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Stayed 5 nights in Feb 2025

6/10 Okay

Brian

Average

Property was probably about as expected for the price. Pros: - Right on the beach - Continental breakfast - Bikes are available for free Cons: - We booked for two people, and they gave us two double beds instead of a queen or king. That didn't make sense to me. The default should be one bed. There were no options to choose beds when I booked. I don't know if that was an ISO problem or a hotels.com problem. - Property inside and out is very old and dated. It does not look like the picture. Rooms smell very musty. - Television was basically broken
Stayed 3 nights in Feb 2025

8/10 Good

Loruhama, Beaverton

Liked: Cleanliness, staff & service, property conditions & facilities
It’s a small little hotel right on the beach. The views of the ocean are amazing. They have free continental breakfast and the pool is nice. Would be prefect if they had a hot tub. There is a restaurant onsite that opens for dinner. Food was good. There’s plenty of shopping nearby. Safeway is across the street and there are lots of restaurants within walking distance. The beach is literally next to the hotel and the pool area is very pretty and well maintained. Nice lush greenery with nice palm trees. Can’t get over that view. Definitely a great choice when staying in Kauai. It’s also relatively close to the airport.

8/10 Good

Laurie

Liked: Cleanliness, staff & service, room comfort
Hotel was nice but a little outdated room was clean liked the grab n go breakfast good location
Stayed 5 nights in Feb 2025

10/10 Excellent

Munir

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Clean great location! Nice and friendly front desk staff
Stayed 3 nights in Feb 2025

10/10 Excellent

Abdul K Chaudhry

Stayed 2 nights in Feb 2025

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

Traveled 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

Traveled 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

Traveled 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

Traveled 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

Traveled 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

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

6/10 Okay

Ross

Traveled 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

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