Little Cayman Sea Temperature

Updated Sat 16:25 (America/Cayman)

Cayman Islands · Forecast updated Aug 8, 2026, 16:25 UTC

Current Sea Temperature

31.0°C

87.8°F

Very warm water

Versus this month's average

Close to average

The August average in our archive is 30.9°C (87.6°F).

Recent trend

Holding fairly steady

Seven-day average: 30.9°C, versus 30.9°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 Little Cayman, monthly averages range from about 29.5°C (85.2°F) in June to 30.9°C (87.6°F) in August.

Over the past 30 days, the average sea temperature in Little Cayman has been 30.4°C.

Month	Min	Average	Max
June	29.0°C / 84.2°F	29.5°C / 85.2°F	30.3°C / 86.5°F
July	29.2°C / 84.6°F	30.1°C / 86.3°F	31.7°C / 89.1°F
August	30.6°C / 87.1°F	30.9°C / 87.6°F	31.3°C / 88.3°F

Profile calculated from 1657 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.

Tiny island fringed by Bloody Bay Wall and pristine, fish-rich shallows.

The current sea surface temperature in Little Cayman is 31.0°C. Over the last 30 days, the average has been 30.4°C.

The warmest monthly average in the Little Cayman archive is August, at around 30.9°C (87.6°F).

The coldest monthly average in the archive is June, at around 29.5°C (85.2°F).

At 31.0°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 Little Cayman.