Monthly Climate
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Best time to visit Gdynia

August is the best time to visit Gdynia for general sightseeing, with average highs of 21 °C and about 13 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 82/100
A beach holiday August sea 19 °C
The least cloud May 56 % average cloud cover
The least rain February 38 mm
Warmth August 21 °C
Cooler weather January 1.7 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 August 82 21 °C 13 48
2 July 81 21 °C 13 42
3 June 77 19 °C 13 21
4 September 73 17 °C 11 28
5 May 65 15 °C 11 13
6 October 50 12 °C 11 7
7 April 47 11 °C 9 12
8 November 29 6.7 °C 11 8
9 March 25 5.6 °C 11 9
10 February 21 2.4 °C 10 10
11 December 21 3.1 °C 11 8
12 January 18 1.7 °C 12 7

For a beach holiday

August scores highest, with a sea temperature of 19 °C and air temperatures around 21 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 4.3 °C 1.7 °C 79 % 7
February 3.1 °C 2.4 °C 78 % 10
March 3.1 °C 5.6 °C 68 % 9
April 5.1 °C 11 °C 57 % 12
May 9.2 °C 15 °C 56 % 13
June 14 °C 19 °C 58 % 21
July 17 °C 21 °C 58 % 42
August 19 °C 21 °C 58 % 48
September 16 °C 17 °C 63 % 28
October 13 °C 12 °C 70 % 7
November 9.1 °C 6.7 °C 81 % 8
December 6.2 °C 3.1 °C 81 % 8

When to think twice

January scores lowest with about 12 wet days and highs near 1.7 °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 1.7 °C 46 mm 79 %
February 2.4 °C 38 mm 78 %
March 5.6 °C 44 mm 68 %
April 10.7 °C 42 mm 57 %
May 15.3 °C 62 mm 56 %
June 18.9 °C 73 mm 58 %
July 21.2 °C 92 mm 58 %
August 21.4 °C 81 mm 58 %
September 17.2 °C 64 mm 63 %
October 12.0 °C 61 mm 70 %
November 6.7 °C 50 mm 81 %
December 3.1 °C 52 mm 81 %

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.