St Barthelemy weather in August 2025

Q: How hot is it in St Barthelemy in August?

Daytime temperatures usually reach 31°C in St Barthelemy in August with very high heat and humidity, falling to 25°C at night.

Q: How sunny is it in St Barthelemy in August?

There are normally 9 hours of bright sunshine each day in St Barthelemy in August - that's 67% of daylight hours.

Q: How warm is the sea around St Barthelemy in August?

The average sea temperature around St Barthelemy in August is 28°C.

Q: Does it rain in St Barthelemy in August?

There are usually 19 days with some rain in St Barthelemy in August and the average monthly rainfall is 100mm.

Q: What is the chance of a hurricane in St Barthelemy in August?

On average less than 1 day in August in St Barthelemy is likely to be affected by the passage of one or more tropical storms.

Expect 88°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in St Barthelemy in August. Check more long-term weather averages for St Barthelemy in August before you book your next holiday to St Barthelemy in 2025/2026.

88
88°F max day temperature
9
9 hours of sunshine per day
19
19 days with some rainfall
77
77°F min night temperature
13
13 hours of daylight per day
VH
Very High heat & humidity
3.9
3.9 inches of monthly rainfall
11
11+ (Extreme) UV index
82
82°F sea temperature

More about St Barthelemy

St Barthelemy by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for St Barthelemy

Marella Cruises: up to 5% off ocean cruises

Sale

Book online & save up to 5% on Marella Cruises
Discount varies by season. Book online with TUI
Destinations across the Med, Caribbean & USA

Go to Marella Cruises deal >>

View all Marella Cruises offers

Cruise deal finder

Destination

The August weather guide for St Barthelemy shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)

How hot is it in St Barthelemy in August?

Daytime temperatures usually reach 88°F in St Barthelemy in August with very high heat and humidity, falling to 77°F at night.

How sunny is it in St Barthelemy in August?

There are normally 9 hours of bright sunshine each day in St Barthelemy in August - that's 67% of daylight hours.

How warm is the sea around St Barthelemy in August?

The average sea temperature around St Barthelemy in August is 82°F.

Does it rain in St Barthelemy in August?

There are usually 19 days with some rain in St Barthelemy in August and the average monthly rainfall is 3.9 inches.

What is the chance of a hurricane in St Barthelemy in August?

On average less than 1 day in August in St Barthelemy is likely to be affected by the passage of one or more tropical storms.

St Barthelemy August sunrise & sunset times

Browse the sunrise and sunset times for St Barthelemy in August 2025. Select a month to view St Barthelemy sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec