Buck Island Sea Temperature

Updated Tue 04:50 (America/St_Thomas)

US Virgin Islands · Forecast updated Aug 11, 2026, 04:50 UTC

Current Sea Temperature

29.2°C

84.6°F

Very warm water

Versus this month's average

Close to average

The August average in our archive is 29.2°C (84.5°F).

Recent trend

Holding fairly steady

Seven-day average: 29.2°C, versus 29.0°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 Buck Island, monthly averages range from about 28.3°C (83.0°F) in June to 29.2°C (84.5°F) in August.

Over the past 30 days, the average sea temperature in Buck Island has been 28.9°C.

Month	Min	Average	Max
June	28.0°C / 82.4°F	28.3°C / 83.0°F	28.7°C / 83.7°F
July	28.4°C / 83.1°F	28.7°C / 83.6°F	29.2°C / 84.6°F
August	28.8°C / 83.8°F	29.2°C / 84.5°F	29.5°C / 85.1°F

Profile calculated from 1717 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.

National monument with an underwater trail through an elkhorn coral barrier reef.

The current sea surface temperature in Buck Island is 29.2°C. Over the last 30 days, the average has been 28.9°C.

The warmest monthly average in the Buck Island archive is August, at around 29.2°C (84.5°F).

The coldest monthly average in the archive is June, at around 28.3°C (83.0°F).

At 29.2°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 Buck Island.