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Weather in Saint Barthélemy - today, tomorrow and 14-day forecast

Below: today's conditions city by city, a live weather map, the 14-day outlook and month-by-month climate to help you pick the best time to travel.

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Next days in Saint Barthélemy

today🌧️ 30°💧 2.4 mm
Sun🌤️ 29°💧 2.8 mm
Mon🌧️ 28°💧 0.9 mm
Tue🌧️ 28°💧 2.5 mm
Wed🌧️ 28°💧 3.4 mm
Thu🌧️ 28°💧 0.9 mm
Fri🌧️ 28°💧 0.2 mm
Sat🌧️ 28°💧 0.4 mm
Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Saturday 5 Sept in Saint Barthélemy, the forecast high is 30°C. Typical daytime temperatures at this time of year range from 28°C to 29°C, so it will be exceptionally warm. It is warmer than 99% of similar days.

30°Cexceptionally warm
usually 28°C–29°C
warmer than 99% of similar days
night: warmer than usual rain: more rain than usual wind: typical
29°Cnear normal
usually 28°C–29°C
night: exceptionally warm rain: more rain than usual wind: typical
28°Ccooler than usual
usually 28°C–29°C
cooler than 71% of similar days
night: warmer than usual rain: typical rainfall wind: typical
28°Ccooler than usual
usually 28°C–29°C
cooler than 77% of similar days
night: near normal rain: more rain than usual wind: stronger than usual
28°Ccooler than usual
usually 28°C–29°C
cooler than 76% of similar days
night: warmer than usual rain: more rain than usual wind: exceptionally strong
28°Ccooler than usual
usually 28°C–29°C
cooler than 73% of similar days
night: warmer than usual rain: typical rainfall wind: exceptionally strong
28°Ccooler than usual
usually 28°C–29°C
cooler than 77% of similar days
night: warmer than usual rain: less rain than usual wind: stronger than usual

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →
25°30°35° 1981: 29°C1982: 28°C1983: 28°C1984: 27°C1985: 28°C1986: 28°C1987: 28°C1988: 28°C1989: 28°C1990: 28°C1991: 28°C1992: 28°C1993: 28°C1994: 29°C1995: 28°C1996: 28°C1997: 28°C1998: 29°C1999: 29°C2000: 29°C2001: 29°C2002: 29°C2003: 29°C2004: 29°C2005: 30°C2006: 29°C2007: 29°C2008: 29°C2009: 29°C2010: 29°C2011: 29°C2012: 29°C2013: 29°C2014: 29°C2015: 29°C2016: 29°C2017: 29°C2018: 29°C2019: 29°C2020: 29°C2021: 30°C2022: 29°C2023: 30°C2024: 30°C2025: 30°C 2026 forecast: 29°C current forecast 29°C 198119902000201020202026
cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 29°C by day. The coolest year was 1984 (27°C) and the warmest was 2023 (30°C). The current forecast averages 29°C - close to the historical median.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Saint Barthélemy

Saint Barthélemy - 14-day weather forecast infographic

Day-by-day forecast for Saint Barthélemy

Saturday5 September 2026
🌧️30°light rain
night 28° · evening 29° · rain 2.37 mm · humidity 81% · wind 7 m/s · clouds 96%
Sunday6 September 2026
🌤️29°a few clouds
night 28° · evening 29° · rain 2.83 mm · humidity 78% · wind 8 m/s · clouds 12%
Monday7 September 2026
🌧️28°light rain
night 28° · evening 29° · rain 0.89 mm · humidity 81% · wind 8 m/s · clouds 6%
Tuesday8 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 2.52 mm · humidity 78% · wind 9 m/s · clouds 16%
Wednesday9 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 3.37 mm · humidity 80% · wind 10 m/s · clouds 37%
Thursday10 September 2026
🌧️28°light rain
night 28° · evening 29° · rain 0.9 mm · humidity 77% · wind 9 m/s · clouds 38%
Friday11 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 0.15 mm · humidity 72% · wind 9 m/s · clouds 33%
Saturday12 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 0.42 mm · humidity 77% · wind 8 m/s · clouds 100%
Sunday13 September 2026
🌧️28°light rain
night 28° · evening 29° · rain 3.84 mm · humidity 76% · wind 9 m/s · clouds 97%
Monday14 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 4.47 mm · humidity 78% · wind 9 m/s · clouds 13%
Tuesday15 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 1.95 mm · humidity 78% · wind 8 m/s · clouds 7%
Wednesday16 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 3.03 mm · humidity 77% · wind 9 m/s · clouds 37%
Thursday17 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 0.51 mm · humidity 74% · wind 10 m/s · clouds 8%
Friday18 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 3.57 mm · humidity 73% · wind 9 m/s · clouds 7%
Saturday19 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 2.34 mm · humidity 75% · wind 10 m/s · clouds 98%

Sea temperature - Saint Barthélemy

Water today
29°C
Week avg
29°C
Waves today
1.2 m
How's the water?
very warm
16-day sea temperature forecast:
5.09 29°C6.09 29°C7.09 29°C8.09 29°C9.09 29°C10.09 29°C11.09 29°C12.09 29°C13.09 29°C
Average sea temperature through the year:
Jan 27°CFeb 27°CMar 27°CApr 27°CMay 28°CJun 29°CJul 29°CAug 30°CSep 30°COct 30°CNov 29°CDec 28°C
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Weather in other countries in Caribbean

Saint Kitts and NevisPuerto RicoSaint MartinMontserratSaint Vincent and the GrenadinesJamaica

FAQ - Saint Barthélemy weather

What is the weather like in Saint Barthélemy today?
Today it is about 30° during the day and 28° at night, light rain.
How far ahead can I check the forecast for Saint Barthélemy?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.