Honolua Bay (“two harbors”) is a large, highly popular sheltered bay where you can hike, swim, snorkel, surf and dive. There is not much beach sand, it’s mostly rocky (and the rocks can be slippery), but the snorkeling and diving are highly rated by many Maui guides.
The high, rocky cliffs on both sides protect the Bay from harsh trade winds. You can get a good view of the bay from the roadway on the cliffs to scope out your best spots from above. You may even spot larger Sea Turtles from this vantage point.
The waters here are part of the Honolua-Mokule’ia Bay Marine Life Conservation District, so no fishing is allowed. Bring a camera instead and bring home pictures of giant Sea Turtles, Cornetfish, Yellowstripe Goatfish, Butterflyfish, Damsel Fish, Hawkfish, Moorish Idol, Parrotfish, Puffer, Stripebelly, Eels, Snapper, Bluestripe, Surgeonfish, Sea Urchin, Humuhumunukunukuapuaa, and more. Most of the coral is on the right-hand side of the bay, and that is where you are likely to find the most fish as well. You may need to swim out a bit from shore, as you will find clearer waters the further you get from shore.
If you don’t have your own snorkeling or underwater camera equipment, check out Boss Frog’s rentals. They have a location nearby the Napili Bay Plaza, in Napili.
Be careful not to leave any open valuables if you drive here yourself. There are reports of break-ins here. There are porta-potties roadside, but no lifeguards, bathrooms or showers near the water. The rock can be pretty rough in spots, beach-safe footwear is recommended. Please do not take any marine life, rocks, coral or sea shells from this location as t is a conservation area.