Weather in São Tomé and Príncipe - 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 São Tomé and Príncipe

today🌧️ 25°💧 5.5 mm

Sun🌧️ 25°💧 0.8 mm

Mon🌧️ 25°💧 0.1 mm

Tue🌧️ 25°💧 0.3 mm

Wed🌧️ 25°💧 1.3 mm

Thu🌧️ 25°💧 0.4 mm

Fri🌧️ 25°💧 0.3 mm

Sat🌧️ 25°💧 0.3 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

Thursday 10 Sept in São Tomé and Príncipe, the forecast high is 25°C. Typical daytime temperatures at this time of year range from 25°C to 26°C, so it will be exceptionally cool. It is cooler than 95% of similar days.

Saturday 5 Sept

25°Cnear normal

usually 25°C–26°C

night: near normal rain: exceptionally wet wind: stronger than usual

Sunday 6 Sept

25°Ccooler than usual

usually 25°C–26°C

cooler than 83% of similar days

night: cooler than usual rain: typical rainfall wind: exceptionally strong

Monday 7 Sept

25°Ccooler than usual

usually 25°C–26°C

cooler than 83% of similar days

night: near normal rain: exceptionally dry wind: typical

Tuesday 8 Sept

25°Ccooler than usual

usually 25°C–26°C

cooler than 88% of similar days

night: near normal rain: less rain than usual wind: stronger than usual

Wednesday 9 Sept

25°Cexceptionally cool

usually 25°C–26°C

cooler than 91% of similar days

night: near normal rain: typical rainfall wind: exceptionally strong

Thursday 10 Sept

25°Cexceptionally cool

usually 25°C–26°C

cooler than 95% of similar days

night: cooler than usual rain: less rain than usual wind: exceptionally strong

Friday 11 Sept

25°Cexceptionally cool

usually 25°C–26°C

cooler than 95% of similar days

night: exceptionally cool rain: exceptionally dry wind: typical

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 →

cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 26°C by day. The coolest year was 1982 (25°C) and the warmest was 2024 (27°C). The current forecast averages 25°C - lower than in 84% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window.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 - São Tomé and Príncipe

São Tomé and Príncipe - 14-day weather forecast infographic

Day-by-day forecast for São Tomé and Príncipe

Saturday5 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 5.53 mm · humidity 86% · wind 7 m/s · clouds 85%

Sunday6 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 0.83 mm · humidity 84% · wind 7 m/s · clouds 100%

Monday7 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 0.13 mm · humidity 82% · wind 6 m/s · clouds 100%

Tuesday8 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 0.31 mm · humidity 82% · wind 6 m/s · clouds 95%

Wednesday9 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 1.26 mm · humidity 82% · wind 7 m/s · clouds 100%

Thursday10 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 0.38 mm · humidity 80% · wind 8 m/s · clouds 79%

Friday11 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 0.26 mm · humidity 81% · wind 6 m/s · clouds 100%

Saturday12 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 0.32 mm · humidity 80% · wind 6 m/s · clouds 92%

Sunday13 September 2026

☁️25°overcast clouds

night 25° · evening 25° · rain 0.44 mm · humidity 80% · wind 6 m/s · clouds 100%

Monday14 September 2026

☁️25°broken clouds

night 25° · evening 25° · rain 0.13 mm · humidity 80% · wind 6 m/s · clouds 62%

Tuesday15 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 0.25 mm · humidity 81% · wind 7 m/s · clouds 68%

Wednesday16 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 1.52 mm · humidity 80% · wind 7 m/s · clouds 73%

Thursday17 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 0.76 mm · humidity 80% · wind 6 m/s · clouds 83%

Friday18 September 2026

🌧️25°light rain

night 25° · evening 25° · rain 1.14 mm · humidity 81% · wind 7 m/s · clouds 54%

Saturday19 September 2026

🌤️25°scattered clouds

night 25° · evening 25° · rain 0.51 mm · humidity 78% · wind 7 m/s · clouds 33%

Sunday20 September 2026

☁️25°overcast clouds

night 25° · evening 25° · humidity 79% · wind 6 m/s · clouds 99%

Sea temperature - São Tomé and Príncipe

Water today

27°C

Week avg

27°C

Waves today

1.1 m

How's the water?

warm

16-day sea temperature forecast:

5.09 27°C6.09 27°C7.09 27°C8.09 27°C9.09 27°C10.09 27°C11.09 27°C12.09 27°C13.09 27°C

Average sea temperature through the year:

Jan 30°CFeb 30°CMar 30°CApr 30°CMay 30°CJun 28°CJul 27°CAug 27°CSep 27°COct 28°CNov 28°CDec 29°C

Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

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FAQ - São Tomé and Príncipe weather

What is the weather like in São Tomé and Príncipe today?

Today it is about 25° during the day and 25° at night, light rain.

How far ahead can I check the forecast for São Tomé and Príncipe?

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.