Derawan Sea Temperature
Indonesia · Forecast updated Jul 15, 2026, 06:23 UTC
Current Sea Temperature
29.7°C
85.5°F
Very warm water
Versus this month's average
Close to average
The July average in our archive is 29.6°C (85.4°F).
Recent trend
Holding fairly steady
Seven-day average: 29.5°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 mean the sea is safe.
Sea Surface Temperature Over the Year
In the data collected for Derawan, monthly averages range from about 29.6°C (85.4°F) in July to 30.1°C (86.2°F) in June.
Over the past 30 days, the average sea temperature in Derawan has been 29.8°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| June | 29.7°C / 85.5°F | 30.1°C / 86.2°F | 30.6°C / 87.1°F |
| July | 29.2°C / 84.6°F | 29.6°C / 85.4°F | 30.2°C / 86.4°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 Derawan
Borneo archipelago with turtles, mantas and a stingless-jellyfish lake.
- Area
- East Kalimantan
Derawan Water Temperature — Common Questions
What is the sea temperature in Derawan today?
The current sea surface temperature in Derawan is 29.7°C. Over the last 30 days, the average has been 29.8°C.
When is the water warmest in Derawan?
The warmest monthly average in the Derawan archive is June, at around 30.1°C (86.2°F).
When is the water coldest in Derawan?
The coldest monthly average in the archive is July, at around 29.6°C (85.4°F).
Can you swim in Derawan today?
Yes — at 29.7°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 Derawan.
View Snorkel Forecast →