Snorkel Spots on the Big Island

The Big Island’s best shore snorkeling is on the dry west side, where lava reefs drop into clear water a few steps from the parking lot. Mornings are calmest on every site below; the trade winds and afternoon chop usually build after lunch, and from about November to March north- and west-facing shores can get big surf. If waves are breaking over the reef or the lifeguard has flags up, skip the swim and come back another day.

Pick the spot that matches your comfort level

First time, or with kids: Kahaluʻu Beach Park in Keauhou. It’s shallow and reef-sheltered, county lifeguards are on duty daily, and the Kahaluʻu Education Center volunteers explain reef etiquette. Stay inside the protected area; a rip current runs out through the opening at the north end.
Confident swimmers: Two Step beside Puʻuhonua o Hōnaunau. You enter from flat lava ledges straight into water about 10 feet deep that falls away over coral. There’s no lifeguard and no sand, so wear booties for the lava.
A beach day with coral: Waialeʻa Bay (Beach 69) on the Kohala Coast, a Marine Life Conservation District, with shade trees and the best coral around the rocks on the south side.
On the Hilo side: Richardson Ocean Park, where a lava breakwater shelters a small black-sand beach and lifeguards are on duty daily.

The rules that protect the reef

Stay at least 10 feet from green sea turtles (honu), on land and in the water, and at least 50 feet from Hawaiian monk seals. Don’t stand on coral; float, or stand only on sand. Hawaiʻi bans the sale of sunscreens containing oxybenzone or octinoxate, and a Hawaiʻi County ordinance goes further, banning sales on the island of sunscreens whose active ingredients aren’t zinc oxide or titanium dioxide. Pack a mineral sunscreen or a rash guard before you arrive.

When a boat is the better plan

The island’s richest reef is off the Captain Cook Monument in Kealakekua Bay, a Marine Life Conservation District since 1969. There’s no road to it, rental kayaks may cross the bay but can’t land at the monument, and the hiking trail is long and steep, so most people go by morning boat. These trips include gear and guides, and many add a stop to look for spinner dolphins from the boat. By law, you can’t swim with or approach spinner dolphins within 50 yards.