Kerama Islands Sea Temperature
Updated Sat 11:15 (Asia/Tokyo)
Japan · Forecast updated Aug 8, 2026, 11:15 UTC
Current Sea Temperature
28.0°C
82.4°F
Very warm water
Versus this month's average
1.0°C below
The August average in our archive is 29.0°C (84.2°F).
Recent trend
Holding fairly steady
Seven-day average: 29.6°C, versus 29.7°C in the prior seven days.
What to wear
Very warm water
Swimwear is usually enough; a rash guard adds sun protection.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions.
Sea Surface Temperature Over the Year
In the data collected for Kerama Islands, monthly averages range from about 25.9°C (78.6°F) in June to 29.0°C (84.2°F) in August.
Over the past 30 days, the average sea temperature in Kerama Islands has been 28.7°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| June | 24.9°C / 76.8°F | 25.9°C / 78.6°F | 27.5°C / 81.5°F |
| July | 26.5°C / 79.7°F | 28.3°C / 83.0°F | 30.8°C / 87.4°F |
| August | 26.7°C / 80.1°F | 29.0°C / 84.2°F | 31.1°C / 88.0°F |
Profile calculated from 1652 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Kerama Islands
Okinawan islands with 'Kerama blue' water, turtles and bright coral.
- Area
- Okinawa
Kerama Islands Water Temperature: Common Questions
What is the sea temperature in Kerama Islands today?
The current sea surface temperature in Kerama Islands is 28.0°C. Over the last 30 days, the average has been 28.7°C.
When is the water warmest in Kerama Islands?
The warmest monthly average in the Kerama Islands archive is August, at around 29.0°C (84.2°F).
When is the water coldest in Kerama Islands?
The coldest monthly average in the archive is June, at around 25.9°C (78.6°F).
Can you swim in Kerama Islands today?
At 28.0°C, the water is usually comfortable for swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Kerama Islands.
View Snorkel Forecast →