Below the white Captain Cook Monument lies a reef often called the best snorkeling on the island. The monument sits across the bay from the nearest road, so you earn the view with a paddle, a boat ride or a steep hike. The water is usually glassy and clear.
The best coral and fish are along the shore near the monument at Kaawaloa, inside a Marine Life Conservation District. The bottom drops off quickly, so you float over a steep reef wall with schools of yellow tang, parrotfish and butterflyfish. Green sea turtles pass through, and spinner dolphins often rest in the bay in the morning. Kealakekua Bay rewards the effort of getting there.
The white obelisk marks where Captain Cook died in 1779. The coral and fish life along the rocks in front of it is the main snorkel draw. The monument itself sits on land you reach only by trail or guided tour.
Depth goes from a few feet to about 40 ft within a short swim. Stay over the reef edge and do not stand on coral.
Pods use the bay as a daytime resting place. Treat them as sleeping animals and keep your distance.
Slender dolphins famous for leaping and spinning. They rest in calm Hawaiian bays by day after feeding offshore at night, which is why the law protects their daytime rest.
Guardian rule: Federal law bans swimming with or approaching spinner dolphins within 50 yards in Hawaii.
Stenella longirostris
The turtle you are most likely to meet. Greens graze on algae over shallow reef and rest under ledges. In Hawaii they are protected and very used to snorkelers.
Spotting tip: Scan the rocky edges where waves wash over algae, and sandy cleaning stations where fish pick at their shells.
Guardian rule: Stay at least 10 ft away. Never block a turtle's path to the surface.
Chelonia mydas
A bright lemon-yellow surgeonfish that grazes algae in loose schools. It is one of the easiest Hawaiian reef fish to spot, especially along the Kona coast.
Zebrasoma flavescens
Colorful grazers with fused, beak-like teeth. You can hear them crunch on coral rock, and much of the white sand on tropical beaches passes through them.
Scaridae
A striking black, white and yellow fish with a long trailing fin, often seen in pairs or small groups over Pacific reefs.
Zanclus cornutus
A bumpy, branching coral that grows in rounded heads on wave-washed Hawaiian reefs. It is often the first coral to bleach in marine heat waves.
Pocillopora meandrina
Live sea temperature, waves and wind for the next 7 days, with our snorkel rating for each day.
Calm Choppy Rough. Wave heights are offshore model values.
Loading tides…
Forecast: Open-Meteo. Tides: NOAA station 1617433. Model data, not a lifeguard report. Always check posted warnings.
Hand-picked tours that run here, ranked for small groups, a proper reef briefing and respect for wildlife.
by Kona Boys
Guided kayak and snorkel trip across Kealakekua Bay. The operator's page lists both 4.5 and 5 hours.
Kona Boys is one of the vendors the State Parks page names as permitted to lead guided kayak tours to the monument.
by Kona Boys
Shorter guided kayak and snorkel trip in Kealakekua Bay.
Kona Boys is named on the State Parks permitted vendor list for guided monument kayak tours.
by Fair Wind Cruises
Boat snorkel trip to Kealakekua Bay on the Fair Wind II, with island-style breakfast and lunch.
The operator publishes an environmental pledge for snorkeling and serves plant-based meals; certifications not verified.
by Fair Wind Cruises
Shorter afternoon boat snorkel trip to Kealakekua Bay on the Fair Wind II.
The operator publishes an environmental pledge for snorkeling; certifications not verified.
by Body Glove Hawaii
Morning snorkel trip on the 41 ft Kona Explorer raft, described by the operator as suited to smaller parties. Ages 6 and up.
We may earn a commission when you book through these links, at no extra cost to you. It never changes which tours we pick. How we choose tours.
Summer is calmest and gives the clearest water. Winter works on most mornings, but big swell and wind can make the bay choppy and the paddle harder.
Go early. Mornings are calmer, dolphins are more likely, and boats and kayak groups build up by late morning.
Days with strong winds or large swell, and the afternoon after boat traffic has stirred up the bay.
| Row | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snorkel conditions | Good | Good | Good | Good | Best | Best | Best | Best | Best | Best | Good | Good |
| Spinner dolphin | Best | Best | Best | Best | Best | Best | Best | Best | Best | Best | Best | Best |
| Water °F | 79 | 79 | 79 | 80 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 80 |
The monument reef is hard to reach on your own. Permitted vessels may not land at Kaawaloa Flat, and the alternative is a long steep hike. Most visitors go with a permitted kayak or boat operator. If you rent a kayak yourself, you can cross the bay but cannot land at the monument.
Swim level: Comfortable swimmer
Napoopoo is the road access on the south side of the bay. Guided kayak tours start from Kona Boys in Kealakekua, and boat snorkel tours leave from Kona harbors. The monument at Kaawaloa is on the far side, reached by hiking the historic Kaawaloa Trail or by a permitted guided tour.
Parking near Napoopoo is limited. The trailhead for the Kaawaloa Trail is a separate steep upland route; check current conditions with State Parks before going.
Boats and tours put you in the water near the monument. Permitted vessels may not land at Kaawaloa Flat or launch from the Napoopoo wharf.
About 20 to 40 minutes each way. Boats leave from Keauhou Bay, Napoopoo wharf area (no launching by permitted vessels).
No park entrance fee. Guided tours charge their own prices, and every vessel in the bay needs a State Parks transit permit.
Official fees and hoursChecked 2026-10-22. Fees change, so confirm before you go.
The best coral is along the shoreline in front of the white monument at Kaawaloa. Snorkelers float over a steep reef wall with schools of yellow tang, parrotfish and butterflyfish. Staying off the land around the monument keeps you within the rules.
Guided kayak tours from Kona Boys paddle across the bay and include time at the monument. Boat snorkel tours reach the same reef from Kona harbors with less effort, and the choice comes down to paddling stamina, budget and group size.
Hawaii bans the sale of sunscreen with oxybenzone and octinoxate, and Hawaii County also restricts several other chemical filters. Use a rash guard, keep your fins off the coral and stay out of the shallows where turtles rest.
Kealakekua Bay State Historical Park is run by Hawaii State Parks, and the bay is a Marine Life Conservation District. The park is open daily from 7 a.m. to 8 p.m.
Every vessel, including kayaks, canoes, paddle boards and inflatables, needs a State Parks permit to transit the bay. Commercial kayaks need a decal on both sides of the bow. Renters do not need their own permit but should confirm the owner's permit is valid. Official rule
Permitted vessels may not land at Kaawaloa Flat or launch from the Napoopoo wharf. The monument is reached by hiking the historic Kaawaloa Trail or on a guided kayak tour with a permitted vendor. Official rule
The State Parks page names Adventures in Paradise and Kona Boys as permitted to lead guided kayak tours to the monument. It says three vendors are permitted but lists two; a search summary named Aloha Kayak Co. as the third, which is not confirmed. Official rule
The trail has no restrooms. Carry water, wear sun protection and pack out all trash. Official rule
Stay at least 50 yd from spinner dolphins and never swim toward, touch or chase them. They rest in the bay by day. Federal rules protect them. Official rule
Do not stand on or touch coral. Wear a rash guard and use only mineral sunscreen.
How snorkelers protect reefs · Hawaii reef-safe sunscreen rules
These local groups restore coral, rescue wildlife and keep the water clean. Volunteer a morning, donate, or just follow their work.
Research and conservation of Kona manta rays
A Kailua-Kona nonprofit that studies manta rays and keeps the Kona Manta ID Catalog. It has supported tour participant guidelines and operator standards, and its website takes donations.
Visit mantapacific.org →
Only by hiking the Kaawaloa Trail or paddling in your own permitted kayak. Permitted vessels may not land at Kaawaloa Flat, so a kayak rental cannot land at the monument. A guided kayak tour with a permitted vendor or a boat tour is the usual way.
Every vessel that transits the bay needs a State Parks permit. If you rent a kayak, you do not apply yourself, but you should confirm with the owner that the kayak has a valid permit. Commercial kayaks need a decal on the bow.
Hawaii State Parks lists Adventures in Paradise and Kona Boys. The page says three vendors are permitted but names two. Check the State Parks page for the current list.
No. Keep at least 50 yd away, and do not approach or chase them. The bay is a resting area, and disturbing the dolphins is illegal.
The Kaawaloa Trail is steep and exposed, with no restrooms or shade services. Plan for a long hot walk back up and carry plenty of water.
What we pack for every snorkel trip. Each link searches the category on Amazon so you can compare brands and prices.
Non-nano zinc oxide only. No oxybenzone or octinoxate, which Hawaii bans.
Shop on Amazon →The best sun protection is fabric. Less sunscreen in the water, less sunburn on your back.
Shop on Amazon →A low-volume mask that fits beats any rental. Short travel fins pack easily.
Shop on Amazon →An inflatable vest lets you rest without standing on the reef. Lifeguards love them.
Shop on Amazon →As an Amazon Associate we earn from qualifying purchases. Disclosure.
After sunset, a boat from Kona drops you at a patch of ocean lit from below. Giant manta rays glide in to feed on the plankton your lights attract,…
Step off a flat lava shelf and you are over a steep, coral-covered reef within seconds. Turtles, schooling fish and a good chance of spinner dolphins…
Spinner dolphins pass the lava-ledge coves, and after dark giant manta rays swoop through your lights on a night snorkel. A bay with a monument can be…
We check fees, rules and access against official sources first, then local operators and recent visitor reports. Conditions change, so always follow posted signs and lifeguards. Spotted something out of date? Tell us.
