Trunk Bay Sea Temperature

Updated Tue 04:50 (America/St_Thomas)

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

Current Sea Temperature

29.1°C

84.4°F

Very warm water

Versus this month's average

Close to average

The August average in our archive is 29.1°C (84.3°F).

Recent trend

Holding fairly steady

Seven-day average: 29.1°C, versus 28.9°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 Trunk Bay, monthly averages range from about 28.2°C (82.8°F) in June to 29.1°C (84.3°F) in August.

Over the past 30 days, the average sea temperature in Trunk Bay has been 28.8°C.

Month	Min	Average	Max
June	27.8°C / 82.0°F	28.2°C / 82.8°F	28.7°C / 83.7°F
July	28.3°C / 82.9°F	28.6°C / 83.5°F	29.0°C / 84.2°F
August	28.7°C / 83.7°F	29.1°C / 84.3°F	29.4°C / 84.9°F

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

Virgin Islands National Park bay with a marked underwater snorkeling trail.

The current sea surface temperature in Trunk Bay is 29.1°C. Over the last 30 days, the average has been 28.8°C.

The warmest monthly average in the Trunk Bay archive is August, at around 29.1°C (84.3°F).

The coldest monthly average in the archive is June, at around 28.2°C (82.8°F).

At 29.1°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 Trunk Bay.