Nosy Be Sea Temperature

Updated Sat 17:52 (Indian/Antananarivo)

Madagascar · Forecast updated Sep 5, 2026, 17:52 UTC

Current Sea Temperature

27.7°C

81.9°F

Warm water

Versus this month's average

Close to average

The September average in our archive is 27.7°C (81.9°F).

Recent trend

Cooling by 0.4°C

Seven-day average: 27.9°C, versus 28.2°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 describe sea conditions.

Sea Surface Temperature Over the Year

In the data collected for Nosy Be, monthly averages range from about 27.7°C (81.8°F) in July to 28.7°C (83.7°F) in June.

Over the past 30 days, the average sea temperature in Nosy Be has been 28.0°C.

Southern Hemisphere. Summer is generally December–February; winter is June–August.

Month	Min	Average	Max
June	27.8°C / 82.0°F	28.7°C / 83.7°F	29.7°C / 85.5°F
July	27.3°C / 81.1°F	27.7°C / 81.8°F	28.1°C / 82.6°F
August	27.2°C / 81.0°F	27.9°C / 82.2°F	28.4°C / 83.1°F
September	27.5°C / 81.5°F	27.7°C / 81.9°F	28.0°C / 82.4°F

Profile calculated from 2330 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.

Northwest island with reef, turtles and seasonal whale sharks in clear water.

The current sea surface temperature in Nosy Be is 27.7°C. Over the last 30 days, the average has been 28.0°C.

The warmest monthly average in the Nosy Be archive is June, at around 28.7°C (83.7°F).

The coldest monthly average in the archive is July, at around 27.7°C (81.8°F).

At 27.7°C, the water is usually comfortable for swimming and snorkeling.

See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Nosy Be.