Monthly Climate
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Best time to visit Bilbao

July is the best time to visit Bilbao for general sightseeing, with average highs of 23 °C and about 10 wet days. The comfortable season runs roughly June to October. The sea stays above 20 °C from July 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 87/100
A beach holiday August sea 22 °C
The least cloud August 56 % average cloud cover
The least rain August 56 mm
Warmth August 23 °C
Cooler weather January 12 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 July 87 23 °C 10 64
2 August 86 23 °C 10 71
3 September 86 22 °C 11 58
4 June 85 21 °C 11 45
5 October 80 19 °C 14 37
6 May 75 18 °C 14 21
7 April 63 15 °C 15 5
8 November 61 15 °C 15 10
9 March 60 14 °C 13 5
10 December 53 13 °C 14 2
11 February 52 12 °C 14 3
12 January 49 12 °C 15 1

For a beach holiday

August scores highest, with a sea temperature of 22 °C and air temperatures around 23 °C. The sea is above 20 °C from July to September.

Month Sea Air Sunshine Beach score
January 13 °C 12 °C 69 % 1
February 13 °C 12 °C 67 % 3
March 13 °C 14 °C 64 % 5
April 13 °C 15 °C 66 % 5
May 15 °C 18 °C 65 % 21
June 18 °C 21 °C 62 % 45
July 21 °C 23 °C 58 % 64
August 22 °C 23 °C 56 % 71
September 20 °C 22 °C 58 % 58
October 18 °C 19 °C 62 % 37
November 16 °C 15 °C 68 % 10
December 14 °C 13 °C 69 % 2

When to think twice

January scores lowest with about 15 wet days and highs near 12 °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 11.9 °C 112 mm 69 %
February 12.3 °C 102 mm 67 %
March 14.1 °C 98 mm 64 %
April 15.4 °C 97 mm 66 %
May 18.1 °C 86 mm 65 %
June 20.6 °C 68 mm 62 %
July 22.6 °C 59 mm 58 %
August 23.5 °C 56 mm 56 %
September 21.8 °C 65 mm 58 %
October 19.3 °C 98 mm 62 %
November 14.9 °C 136 mm 68 %
December 12.6 °C 106 mm 69 %

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.