4-796 Kuhio Hwy, Kapaa, Hawaii, 96746, Kapaa — 4.0 mi from Wailua Falls
Checking price…
Top-rated location
Guests rate location 9.3/10.
Pool on site
Cool off without leaving.
Discover your tropical escape at The ISO by Castle, where paradise meets comfort in the heart of Kapaa. Recreational Amenities Unwind under the sun at our sparkling outdoor pool or explore the stunning coastline with our bicycle rentals, perfect for both relaxation and adventure. Culinary Delights Savor the flavors of the region at The Bullshed Restaurant, a beachfront eatery that offers a delightful bar/lounge experience and serves up local cuisine to tantalize your taste buds. Comfort and Convenience Retreat to one of our 78 air-conditioned rooms, each equipped with modern amenities including flat-screen TVs, refrigerators, and private balconies for stunning views, ensuring a restful stay.
Check-in
03:00 PM
Check-out
11:00 AM
Pets
Not allowed
Children
Adults only
One flat fee
The price is what the hotel charges us plus one small, flat service fee — the same for every guest.
No surveillance pricing
We never use your device, location or browsing history to decide what you pay.
All-in, no surprises
Taxes and known fees are shown up front. What you see is what you book.
Very good
152 reviews · updated January 2026
Guests loved
Worth noting
Mold, heat, and humidity
+Convenient location
–AC did nothing to take the heat and humidity out of the room, even at all the right settings. Haven't had this terrible a night at a hotel in the US ever. Hard to breathe too, probably mold.
Calm and cozy place with morning yoga and views for days! Walk along boardwalk to everything!
+We absolutely loved the location, could walk to so much in the area. Also the bikes available to ride were so much fun. We rode for miles along the beach and really was a highlight to our trip. We walked to dinner every night and really enjoyed seeing the ocean on the walking path. The property was…
–The restaurant and bar were not open and didnt look to be opening anytime soon. We were expecting it so that was somewhat of a disappointment. A positive to it though was less people on site :)
Safe, friendly and clean
+This property was great. Central to everything. Near a safeway and a ross and the best shaved ice/restaurants. Also has a pool and amazing view. Also if you have a prob with the room they will surely fix it.
–N/a
Disappointed
+Ocean view
–room had a strong moldy smell, and I experienced an allergic reaction because of it. Both the room and bathroom were very old and outdated, and the lighting in the room was poor. The breakfast was disappointing as well, they didn’t even serve regular black coffee. Due to these issues, especially…
Rather expensive but hey, we woke up in paradise…
+It was easy to get to from the Lihue airport. The room was small but beds were comfortable. The view from our deck was beautiful and we were entertained by the local chickens wandering the property.
–The website advertises an onsite restaurant which appealed to us, as we had taken an Uber to the hotel and we were traveling with my elderly mother who has mobility issues. On arrival, we were told it was being renovated but it didn’t actually look like anything was being done. We would have made a…
+Good location. Free parking.
–Dated rooms.
Verified guest reviews from completed stays · updated January 2026.
4-796 Kuhio Hwy, Kapaa, Hawaii, 96746, Kapaa
Open in Google Maps ↗Straight-line distances.
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0.1 mi away · Kapaa
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Sheraton Kauai Coconut Beach Resort
0.2 mi away · Kapaa
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0.6 mi away · Kapaa
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0.6 mi away · Kapaa
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0.7 mi away · Kapaa
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Check-in starts at 03:00 PM and check-out is by 11:00 AM.
Yes — The ISO by Castle has a swimming pool.
The ISO by Castle offers facilities for guests with disabilities. Contact the property to confirm the specifics for your needs.
No, pets are not allowed at The ISO by Castle.
It's about 5.9 mi (straight-line) from Lihue airport (LIH).
The nearest is Poipu Beach, about 15 mi away (straight-line).
It depends on the rate you pick — many rooms at The ISO by Castle offer free cancellation. You'll see each room's exact policy before you book.
Any mandatory property fees are shown in your all-in total before you book — no surprises at checkout.
Guests rate it 8.4/10 (Very good) across 152 reviews.
One honest price: what the hotel charges us plus one small flat fee — the same for everyone, never based on your data. No hidden markup and no fake discounts.
Pets
Pets not allowed
Children and extra beds
No rollaway/extra beds available
Guest type
Essential workers only - NO
Accessibility
No elevators
General
Professional property host/manager
Only registered guests are allowed in the guestrooms.
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The ISO by Castle