A New Chapter Begins

We’re proud to share that The ISO Hotel is now a Trademark Collection by Wyndham property in Hawaiʻi! While our name grows in recognition, our heart remains rooted in the community.

We’re still the Kamaʻāina-friendly hotel you know and love that is committed to providing exceptional hospitality to Hawaiʻi residents and visitors alike. The services we provide will continue with the same familiar team from Castle Resorts & Hotels, dedicated to making every stay memorable. As part of the Wyndham Rewards® family, guests will be able to earn points with every visit and enjoy exclusive member discounts.

For booking assistance, reach our reservation team at (866) 290-5708 or contact the hotel directly at (808) 822-3971.

in-room key and card holder for The ISO

Aloha Charm With A Beach Vibe

Situated on a private oceanfront expanse, at the intersection of Island, Sky, and Ocean, you will find The ISO, a charming boutique hotel on Kauaʻi. Here, at the island’s eastern edge, you will find the Hawaiʻi of your dreams, the perfect place to witness a spectacular sunrise then start your day with morning yoga, or just disappear deep into your favorite novel.

​Conveniently located in the sunny town of Kapaʻa, this boutique hotel is ideally situated for those seeking rest and relaxation after an adventure-filled day on the beautiful island of Kauaʻi. All rooms blend a contemporary Hawaiian-style vibe with a rustic-chic beach décor.

 

Stay

Rooms & Hotel Amenities

  • view of the lobby with breakfast station set
  • Fire pit at night with a girl sitting and reading
Link to: Dine

Dine

On-Site Restaurant

Renowned for superb, tender Prime Rib and steaks, as well as imaginative preparations of the best fresh catches. Enjoy indoor or outdoor ocean-side seating. The Bull Shed is open daily from 4:30 p.m. to 9:30 p.m. For reservations call: 808.822.3791.

Offers

Deals & Promotions

  • Stay Longer, Save More

    The longer you stay, the better the savings. Stay an extra day or a week because we let you linger longer with special pricing up to 20% off.

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    Lady holding cocktail while lounging near the beach at the ISO

  • Pay Now, Play Later

    For those who plan ahead, this is for you! The further you book in advance, the better the deal, up to 30% off.

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    Couple looking happy at the pool's edge at the ISO

  • Last Minute Deals

    You Only Live Once, so book now before these deals are gone on select rooms and categories.

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    Cup of coffee in logo mug from the ISO with a lei and a magazine
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couple looking up at the trees while exploring the coconut forest on Kauai
Link to: Explore Kauaʻi

Explore

Kapaʻa, Kauaʻi

The perfect home base for boundless natural wonders, recreation, activities, and culture that define Kauaʻi’s heart.

LEARN MORE
Guy going surfing on the beach near the ISO

The ISO Hotel, Trademark Collection by Wyndham

4-796 Kuhio Hwy, Kapaʻa, HI 96746

Room Reservations: +1 (866) 290-5708

Hotel Direct: (808) 822-3971

Email: [email protected]

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© 2026 The ISO Hotel, Trademark Collection by Wyndham The ISO supports the proper use of the ʻokina [‘] and kahakō [ō] in the Hawaiian language. However, these diacritical marks may have been omitted from our digital communication to provide the best possible online experience.