Monthly Climate
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Best time to visit Saint Peter Port

August is the best time to visit Saint Peter Port for general sightseeing, with average highs of 17 °C and about 9 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 August comfort 73/100
A beach holiday August sea 17 °C
The least cloud July 54 % average cloud cover
The least rain July 37 mm
Warmth August 17 °C
Cooler weather February 9.0 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 August 73 17 °C 9 36
2 July 72 16 °C 7 31
3 September 70 17 °C 9 33
4 June 66 15 °C 8 17
5 October 57 15 °C 15 11
6 May 57 12 °C 8 15
7 April 47 10 °C 9 12
8 November 45 13 °C 17 0
9 March 39 9.5 °C 11 7
10 December 37 11 °C 17 0
11 February 35 9.0 °C 13 4
12 January 35 9.7 °C 15 0

For a beach holiday

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

Month Sea Air Sunshine Beach score
January 10 °C 9.7 °C 75 % 0
February 9.5 °C 9.0 °C 71 % 4
March 9.2 °C 9.5 °C 67 % 7
April 9.9 °C 10 °C 59 % 12
May 12 °C 12 °C 60 % 15
June 14 °C 15 °C 57 % 17
July 16 °C 16 °C 54 % 31
August 17 °C 17 °C 57 % 36
September 17 °C 17 °C 59 % 33
October 16 °C 15 °C 69 % 11
November 14 °C 13 °C 73 % 0
December 12 °C 11 °C 75 % 0

When to think twice

January scores lowest with about 15 wet days and highs near 9.7 °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 9.7 °C 99 mm 75 %
February 9.0 °C 76 mm 71 %
March 9.5 °C 60 mm 67 %
April 10.5 °C 51 mm 59 %
May 12.4 °C 45 mm 60 %
June 14.5 °C 43 mm 57 %
July 16.4 °C 37 mm 54 %
August 17.3 °C 52 mm 57 %
September 16.8 °C 58 mm 59 %
October 15.2 °C 109 mm 69 %
November 12.7 °C 123 mm 73 %
December 10.7 °C 122 mm 75 %

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.