Kerama Islands Sea Temperature
Japan · Forecast updated Jul 15, 2026, 06:22 UTC · refresh delayed
Current Sea Temperature
27.1°C
80.8°F
Warm water
Versus this month's average
0.6°C below
The July average in our archive is 27.7°C (81.9°F).
Recent trend
Cooling by 1.0°C
Seven-day average: 27.3°C, versus 28.3°C in the prior seven days.
What to wear
Warm water
Most people are comfortable in swimwear or a light rash guard.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not mean the sea is safe.
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 27.7°C (81.9°F) in July.
Over the past 30 days, the average sea temperature in Kerama Islands has been 27.1°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 | 27.7°C / 81.9°F | 29.2°C / 84.6°F |
Profile calculated from 1071 hourly forecast records across 2 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 27.1°C. Over the last 30 days, the average has been 27.1°C.
When is the water warmest in Kerama Islands?
The warmest monthly average in the Kerama Islands archive is July, at around 27.7°C (81.9°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?
Yes — at 27.1°C the water is warm enough for comfortable 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 →