worldweather

Weather in Saint Martin - 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.

single country point. About & methodology.

Next days in Saint Martin

today🌧️ 30°💧 3.9 mm
Sun🌧️ 30°💧 1.4 mm
Mon🌧️ 28°💧 1.7 mm
Tue🌧️ 28°💧 2.3 mm
Wed🌧️ 28°💧 4.3 mm
Thu🌧️ 28°💧 0.1 mm
Fri🌧️ 28°💧 0.1 mm
Sat🌧️ 28°💧 0.6 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 Martin, 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 95% of similar days.

30°Cexceptionally warm
usually 28°C–29°C
warmer than 95% of similar days
night: warmer than usual rain: more rain than usual wind: typical
30°Cexceptionally warm
usually 28°C–29°C
warmer than 94% of similar days
night: warmer than usual rain: typical rainfall wind: typical
28°Cexceptionally cool
usually 28°C–29°C
cooler than 90% of similar days
night: near normal rain: typical rainfall wind: stronger than usual
28°Cexceptionally cool
usually 28°C–29°C
cooler than 93% of similar days
night: near normal rain: typical rainfall wind: exceptionally strong
28°Cexceptionally cool
usually 28°C–29°C
cooler than 91% of similar days
night: near normal rain: more rain than usual wind: exceptionally strong
28°Ccooler than usual
usually 28°C–29°C
cooler than 88% of similar days
night: near normal rain: less rain than usual wind: exceptionally strong
28°Ccooler than usual
usually 28°C–29°C
cooler than 88% of similar days
night: exceptionally warm 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: 29°C1988: 29°C1989: 29°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 Martin

Saint Martin - 14-day weather forecast infographic

Day-by-day forecast for Saint Martin

Saturday5 September 2026
🌧️30°light rain
night 28° · evening 29° · rain 3.89 mm · humidity 80% · wind 7 m/s · clouds 66%
Sunday6 September 2026
🌧️30°light rain
night 28° · evening 28° · rain 1.44 mm · humidity 80% · wind 8 m/s · clouds 30%
Monday7 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 1.68 mm · humidity 82% · wind 8 m/s · clouds 3%
Tuesday8 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 2.34 mm · humidity 75% · wind 10 m/s · clouds 8%
Wednesday9 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 4.3 mm · humidity 82% · wind 10 m/s · clouds 64%
Thursday10 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 0.12 mm · humidity 79% · wind 10 m/s · clouds 80%
Friday11 September 2026
🌧️28°light rain
night 29° · evening 28° · rain 0.12 mm · humidity 73% · wind 9 m/s · clouds 2%
Saturday12 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 0.57 mm · humidity 76% · wind 8 m/s · clouds 100%
Sunday13 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 4.44 mm · humidity 71% · wind 9 m/s · clouds 98%
Monday14 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 1.14 mm · humidity 78% · wind 9 m/s · clouds 28%
Tuesday15 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 1.53 mm · humidity 76% · wind 8 m/s · clouds 80%
Wednesday16 September 2026
🌧️28°light rain
night 28° · evening 28° · rain 3.45 mm · humidity 79% · wind 10 m/s · clouds 44%
Thursday17 September 2026
☁️28°broken clouds
night 28° · evening 28° · rain 2.64 mm · humidity 72% · wind 10 m/s · clouds 60%
Friday18 September 2026
🌧️28°moderate rain
night 28° · evening 27° · rain 6.45 mm · humidity 72% · wind 9 m/s · clouds 8%
Saturday19 September 2026
🌧️28°moderate rain
night 28° · evening 28° · rain 12.6 mm · humidity 81% · wind 10 m/s · clouds 95%

Sea temperature - Saint Martin

Water today
29°C
Week avg
29°C
Waves today
0.9 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 28°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 Vincent and the GrenadinesSaint Kitts and NevisSaint LuciaSaint BarthélemyTrinidad and TobagoPuerto Rico

FAQ - Saint Martin weather

What is the weather like in Saint Martin 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 Martin?
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.