Monthly Climate
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Best time to visit São Tomé

July is the best time to visit São Tomé for general sightseeing, with average highs of 26 °C and about 4 wet days. The comfortable season runs roughly June to September.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking July comfort 76/100
A beach holiday July sea 26 °C
The least cloud June 68 % average cloud cover
The least rain July 17 mm
Warmth March 29 °C
Cooler weather July 26 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 July 76 26 °C 4 97
2 August 76 26 °C 5 95
3 June 73 27 °C 5 95
4 September 66 26 °C 11 84
5 October 53 27 °C 22 74
6 November 52 27 °C 25 73
7 May 52 28 °C 18 72
8 December 52 27 °C 26 72
9 January 50 28 °C 24 71
10 February 48 29 °C 20 70
11 April 48 29 °C 19 69
12 March 47 29 °C 21 68

For a beach holiday

July scores highest, with a sea temperature of 26 °C and air temperatures around 26 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 29 °C 28 °C 76 % 71
February 29 °C 29 °C 78 % 70
March 29 °C 29 °C 81 % 68
April 29 °C 29 °C 81 % 69
May 28 °C 28 °C 75 % 72
June 27 °C 27 °C 68 % 95
July 26 °C 26 °C 70 % 97
August 26 °C 26 °C 71 % 95
September 26 °C 26 °C 74 % 84
October 27 °C 27 °C 74 % 74
November 28 °C 27 °C 72 % 73
December 28 °C 27 °C 72 % 72

When to think twice

March scores lowest with about 21 wet days and highs near 29 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 27.9 °C 150 mm 76 %
February 28.5 °C 127 mm 78 %
March 28.8 °C 149 mm 81 %
April 28.6 °C 146 mm 81 %
May 27.8 °C 135 mm 75 %
June 26.6 °C 30 mm 68 %
July 25.9 °C 17 mm 70 %
August 26.0 °C 32 mm 71 %
September 26.4 °C 82 mm 74 %
October 26.7 °C 200 mm 74 %
November 27.1 °C 233 mm 72 %
December 27.5 °C 191 mm 72 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.