São Tomé weather in May
Temperature, sea and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Good
Best time to visit: June – September
What is the weather like in São Tomé in May?
In May, São Tomé is warm: daytime highs average 27 °C, and even at night it stays warm at around 25 °C. The sea averages 28.4 °C – lovely and warm for swimming. Expect around 6 hours of sunshine a day. It is the rainy season: rain falls on about 17 days, totalling 120 mm. The air is often humid and muggy. All in all, May is a good month for a holiday in São Tomé.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 12 h 8 min05:25 – 17:33
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 75 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+0Africa/Sao_Tome
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %45 %
- Few rainy daysweight 30 %7 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in May
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
São Tomé in May: quick answers
Is São Tomé hot in May?
Warm rather than hot: in May, daytime highs in São Tomé average 27 °C and nights cool to about 25 °C.
Can you swim in São Tomé in May?
Yes. In May the sea averages 28.4 °C – lovely and warm for swimming.
Does it rain much in São Tomé in May?
It rains often – on about 17 days, adding up to 120 mm.
São Tomé month by month
The whole year in São ToméAll destinations: São Tomé and PríncipeWhere to go in MaySea temperature in May
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences