Monthly Climate
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Best time to visit Porto

June is the best time to visit Porto for general sightseeing, with average highs of 23 °C and about 6 wet days. The comfortable season runs roughly May 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 June comfort 92/100
A beach holiday August sea 17 °C
The least cloud July 33 % average cloud cover
The least rain July 22 mm
Warmth August 26 °C
Cooler weather January 13 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 June 92 23 °C 6 59
2 September 91 24 °C 6 64
3 July 90 25 °C 4 73
4 August 89 26 °C 4 73
5 May 83 20 °C 11 35
6 October 81 20 °C 12 36
7 April 73 17 °C 12 20
8 March 70 16 °C 10 18
9 November 66 16 °C 13 16
10 February 61 14 °C 10 11
11 December 57 14 °C 12 7
12 January 54 13 °C 12 6

For a beach holiday

August scores highest, with a sea temperature of 17 °C and air temperatures around 26 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 14 °C 13 °C 60 % 6
February 13 °C 14 °C 55 % 11
March 14 °C 16 °C 55 % 18
April 14 °C 17 °C 56 % 20
May 16 °C 20 °C 53 % 35
June 17 °C 23 °C 45 % 59
July 17 °C 25 °C 33 % 73
August 17 °C 26 °C 35 % 73
September 17 °C 24 °C 45 % 64
October 17 °C 20 °C 57 % 36
November 16 °C 16 °C 60 % 16
December 14 °C 14 °C 62 % 7

When to think twice

January scores lowest with about 12 wet days and highs near 13 °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 12.9 °C 154 mm 60 %
February 13.9 °C 103 mm 55 %
March 16.3 °C 123 mm 55 %
April 17.5 °C 123 mm 56 %
May 20.0 °C 102 mm 53 %
June 23.0 °C 39 mm 45 %
July 25.3 °C 22 mm 33 %
August 25.9 °C 30 mm 35 %
September 23.9 °C 64 mm 45 %
October 20.1 °C 166 mm 57 %
November 15.7 °C 166 mm 60 %
December 13.6 °C 171 mm 62 %

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.