Oceanfront (1st to 3rd - Upper floors Stair Access Only)
279 sq ft
Flat Screen TV
Cable/satellite TV
Bathroom Amenities
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Oceanfront (1st to 3rd - Upper floors Stair Access Only)
Flexible Rate
3 adults
Ocean View Suite (2nd floor Stair Access Only)
Bathroom Amenities
Flat Screen TV
Cable/satellite TV
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Ocean View Suite (2nd floor Stair Access Only)
Flexible Rate
4 adults
Deluxe Ocean View (2nd floor Stair Access Only)
290 sq ft
Bathroom Amenities
Flat Screen TV
Cable/satellite TV
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Deluxe Ocean View (2nd floor Stair Access Only)
Flexible Rate
3 adults
Beach House Suite (2nd floor Stair Access Only)
Flat Screen TV
Cable/satellite TV
Bathroom Amenities
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Beach House Suite (2nd floor Stair Access Only)
Flexible Rate
4 adults
Location
With a stay at The ISO by Castle in Kapaa, you'll be on the beach, within a 15-minute drive of Kalapaki Beach and Waipouli Beach. This beach resort is 8.5 mi (13.8 km) from Nawiliwili Harbor and 8.5 mi (13.6 km) from Nawiliwili Bay.
4-796 Kuhio Highway, Hawaii, United States - Kauai
Amenities
Sports & activities
Golfing nearby
Yoga
Reception services
Front desk (limited hours)
House Rules
100% non-smoking
Conditions
Check-in/ Check-out
Check-in 03:00 PMCheck-out 11:00 AM
Credit cards accepted by the hotel
Discover, American Express, MasterCard, Visa
About this property
Location
United States>Hawaii>Kauai
Number of rooms
78
The ISO by Castle
Reviews
Tripadvisor Reviews (165)
3.7 /5This average is based on 165 reviews
Cleanliness
Sleep quality
Value
Service
Location
M
maxt652Portland, Oregon July 2026
Decent rooms, but lacks warmth and upkeep
Overall, the room itself was clean on the inside and met my basic needs, but there are a few areas regarding hospitality, maintenance, and amenities that could use attention. While the staff wasn’t ru...
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T
troyf548June 2026
Never again
Motel at best! Paper thin walls, musty and dusty! 10:30pm at night and I can hear every single word my neighbors says, it's almost like there are no walls between us at all! Luckily we only have one ...
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B
bitac2026February 2026
Not good. Avoid this place
The location is nice, but don’t be fooled by the pics you see online!! Absolutely horrible place to stay in. We had ocean-front king deluxe room. The rooms are outdated with the feel of a 1960s era mo...
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G
G6372YUannettebCrown Point, Indiana December 2025
Great hotel for price
For the price this hotel is great, the location is excellent on the beach, there is a free grab and go breakfast but not available til 7am. Room service needs to be requested 24hours in advance. The...
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L
lauranU4112GFDecember 2025
Decent property, questionable staff
This is a good mid priced hotel. The setting with views of the pool and the ocean was great. The room was comfortable and clean. Our only negative was the staff person working when we checked in aroun...
Decent rooms, but lacks warmth and upkeep
Overall, the room itself was clean on the inside and met my basic needs, but there are a few areas regarding hospitality, maintenance, and amenities that could use attention. While the staff wasn’t ru...
show more