9 Enchanting Sea Caves In Hawaii You’ll Want To Explore

The Hawaiian Islands are home to 750 breathtaking miles of coastline, including picturesque beaches, striking cliffs, and enchanting sea caves. From Kauai’s Na Pali Coast to the Big Island’s Kona Coast and everywhere in between, these nine sea caves along the Hawaiian shoreline are sure to leave you speechless – if you’re able to find them, that is.

Which of these sea caves in Hawaii is your favorite? You won’t want to miss these caves, as well as the secrets of the Hawaiian coastline.

Address: Waianapanapa State Park, Hana, HI 96713, USA
Address: Hanak?p?‘ai Beach, Hanak?p?‘Ai Beach, Hawaii 96746, USA
Address: Waiahuakua Sea Cave, Kapa?a, HI 96746, USA
Address: Lanai, Hawaii 96763, USA
Address: Spitting Cave, 7 Lumahai St, Honolulu, HI 96825, USA
Address: Keauhou Bay, Kahaluu-Keauhou, HI 96740, USA
Address: N? Pali Coast State Wilderness Park, Kapa?a, HI 96746, USA
Address: Mermaid Caves, Keaulana Ave, Hawaii 96792, USA
The OIYS Visitor Center

Hawaiian Sea Caves

July 12, 2022

Which sea caves in Hawaii are the largest?  

Hawaii is home to one of the largest sea caves in the world! Waiahuakua Cave is found on Kauai and is one of the longest sea caves on Earth. It’s 1,155 feet long and worth exploring for those who have the ability to do so. Some folks humorously call it the “Double Door” cave thanks to being tunnel-like and having both an entrance and an exit. You’ll definitely want to go in – it’s a sight and a half to behold. Experience the fantastic cathedral room and check out fascinating tunnel hallways. There’s a huge, pinkish rock that looks eerily like a hippopotamus (you can’t miss it), and even a waterfall that cascades from part of the cave ceiling. In terms of the natural wonders in Hawaii, this is one you can’t miss.   

How many Hawaii caves are underwater?  

Hawaii is a geology nerd’s wonderland with lots of fascinating features and opportunities to learn and explore. Hawaii is home to more than 400 known caves, many of which are only accessible via diving. Some of the most notorious sea caves in Hawaii include the Spitting Caves, on Oahu, where you might spot some rare wildlife while exploring the five caverns. Another option is the Mermaid Cave, which is one of the most famous sea caves in Hawaii. Finally (but not FINAL-y, considering there are hundreds of Hawaiian sea caves), you might want to check out Keauhou Bay and the sea caves that lurk there, where you’ll find vibrant sea life and all sorts of nook and crannies to get into – safely, of course.  

Are there any secret caves in Hawaii worth visiting?  

Honestly, we kind of feel like every cave in Hawaii is worth exploring, but most certainly the secret caves in Hawaii! Sure, you can visit one of the most famous caves or sea caves, but they might be crowded. Enter some of the lesser-known caves in Hawaii just waiting to be explored, like Kaumana Cave. This cave is a locally known secret that visitors are free to explore; there are at least two miles of caves open to the public in this cave, and it’s well worth an excursion.  

Address: Waianapanapa State Park, Hana, HI 96713, USA
Address: Hanak?p?‘ai Beach, Hanak?p?‘Ai Beach, Hawaii 96746, USA
Address: Waiahuakua Sea Cave, Kapa?a, HI 96746, USA
Address: Lanai, Hawaii 96763, USA
Address: Spitting Cave, 7 Lumahai St, Honolulu, HI 96825, USA
Address: Keauhou Bay, Kahaluu-Keauhou, HI 96740, USA
Address: N? Pali Coast State Wilderness Park, Kapa?a, HI 96746, USA
Address: Mermaid Caves, Keaulana Ave, Hawaii 96792, USA