Kerama Islands

Verified2026-09-11 checkedReefWall

A national park archipelago west of Okinawa, known for water clarity and for humpbacks passing in winter.

Depth: 5–35 m16–115 ft
Difficulty: Beginner
Entry: Boat
Typical current: Light
Coordinates: 26°12.000′N 127°21.000′E
Activities: Scuba · Snorkelling · Freediving

The Keramas were made a national park in 2014 and the water gives a name to a colour — Kerama blue. Visibility routinely passes 40 m and the reefs are shallow and forgiving, which makes this an unusually good place to learn. Green turtles are resident and easy. Humpback whales pass through between January and March; they are heard on almost every winter dive and seen from the boat rather than underwater.

High-speed ferry from Naha to Zamami or Tokashiki, then a short boat ride.

Best season

ExcellentApr–Jun
ExcellentSep–Oct
GoodJul–Aug
GoodNov–Dec
GoodMar
FairJan–Feb

Before you get in

Past 30 m, where no-stop time and gas both go quickly and nitrogen narcosis starts to show.
A wall. There is no bottom in sight to judge against, so depth is kept by the gauge alone — and it is easy to end up deeper than intended.

Taken from this site’s recorded depth, type and current, and nothing else. An empty list is not a safe site — the sea on the day, the local geography and the boat traffic are not in it. The briefing on the spot comes first.

Conditions

Water temperature: 28.3°C83°F
Wave height: 1.4 m5 ft
Air temperature: 24.6°C76°F
Wind speed: 35.3 km/h21.9 mph

Updated 2026-10-07 16:15 UTC · Source: Open-Meteo

Weather data by Open-Meteo.com (CC BY 4.0)

Conditions are reported for information only. Assess the site yourself and follow your guide and your training.

No live conditions for this site yet.

We only show numbers we can attribute to a source.

Sea state and tide

On a date

Tide · 10/8

High04:401.70 m
Low10:560.14 m
High17:151.74 m
Low23:160.28 m

Forecast heights against mean sea level. Real tides in a bay, a harbour or over a flat can differ — check an official tide table before you get in.

Pick a day to see its tide

Only wave height and wind are scored, because those are what close a boat ramp or a shore entry. Water temperature is reported and never scored: 12°C is an ordinary dive in a drysuit and punishing in a 3 mm, and a number that cannot see your suit has no business marking it down. Stars do not decide whether you get in — you and your guide do, on the day.

Weather data by Open-Meteo.com (CC BY 4.0)

Marine life you may see

Giant clamTridacna gigasRare
Spotted garden eelHeteroconger hassiRare
Blacktip reef sharkCarcharhinus melanopterusCommon
Crown-of-thorns starfishAcanthaster planciRare
Green turtleChelonia mydasCommon
Clark’s anemonefishAmphiprion clarkiiCommon
NudibranchNudibranchiaCommon
Reef manta rayMobula alfrediRare
Humpback whaleMegaptera novaeangliaeJan–MarSeasonal
Raccoon butterflyfishChaetodon lunulaCommon
Staghorn coralAcropora spp.Common
Moorish idolZanclus cornutusCommon
Blue sea starLinckia laevigataCommon
Feather starCrinoideaCommon
Emperor angelfishPomacanthus imperatorCommon

From divers

What people who were in the water reported. Not a forecast, and not a judgement about whether the site is safe to dive.

No recent reports from divers. If you dived here in the last two weeks, you can say how it was.

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