Gdynia climate

Name: Gdynia
Address: PL

Gdynia is warmest in August, with average highs of 21 °C, and coldest in January, when nights average -1.8 °C. July is the wettest month (92 mm) and February the driest (38 mm). Figures are 1991–2020 climate normals.

Across a full year Gdynia averages 705 mm of rain, 10 days above 25 °C and 72 days below freezing.

Poland · population 257,000 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month August 21 °C
Coldest month January -1.8 °C
Driest month February 38 mm
Wettest month July 92 mm
Least cloud May 56 % cloud
Hottest on record June 34 °C
Coldest on record February -18 °C
Warmest sea August 19 °C

What to expectGdynia through the year

Gdynia has a clear annual cycle: average daily highs run from 1.7 °C in January to 21 °C in August, a swing of 18 °C in mean temperature across the year.

Counted across a normal year, 10 days a year reach 25 °C, 1 of them reach 30 °C, 72 nights drop below freezing. The warmest reading in the 1991–2020 record is 34 °C, in June.

Rain is strongly seasonal. July averages 92 mm against 38 mm in February — 2.4 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Gdynia is warmest in August at 19 °C and coldest in February at 3.1 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

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 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days below 0 °C
January	1.7 °C	-1.8 °C	-0.1 °C	12.1 °C	-17.5 °C	0	18
February	2.4 °C	-1.8 °C	0.3 °C	14.3 °C	-18.0 °C	0	17
March	5.6 °C	-0.0 °C	2.7 °C	18.7 °C	-12.9 °C	0	14
April	10.7 °C	3.4 °C	7.2 °C	24.8 °C	-6.9 °C	0	4
May	15.3 °C	8.0 °C	11.9 °C	27.1 °C	-0.8 °C	1	0
June	18.9 °C	12.0 °C	15.7 °C	33.8 °C	4.2 °C	2	0
July	21.2 °C	14.8 °C	18.2 °C	32.5 °C	7.5 °C	4	0
August	21.4 °C	15.0 °C	18.2 °C	32.4 °C	9.0 °C	4	0
September	17.2 °C	11.7 °C	14.4 °C	31.1 °C	3.7 °C	1	0
October	12.0 °C	7.3 °C	9.6 °C	21.9 °C	-1.2 °C	0	0
November	6.7 °C	3.2 °C	4.9 °C	15.9 °C	-10.7 °C	0	5
December	3.1 °C	-0.2 °C	1.5 °C	12.3 °C	-14.3 °C	0	14

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	46 mm	12	7.9 h/day	79 %	85 %	28 km/h	4.3 °C
February	38 mm	10	9.7 h/day	78 %	83 %	27 km/h	3.1 °C
March	44 mm	11	12 h/day	68 %	79 %	25 km/h	3.1 °C
April	42 mm	9	14 h/day	57 %	77 %	22 km/h	5.1 °C
May	62 mm	11	16 h/day	56 %	76 %	22 km/h	9.2 °C
June	73 mm	13	17 h/day	58 %	76 %	22 km/h	13.9 °C
July	92 mm	13	17 h/day	58 %	77 %	21 km/h	17.4 °C
August	81 mm	13	15 h/day	58 %	77 %	21 km/h	18.8 °C
September	64 mm	11	13 h/day	63 %	78 %	23 km/h	16.4 °C
October	61 mm	11	11 h/day	70 %	81 %	25 km/h	12.8 °C
November	50 mm	11	8.5 h/day	81 %	86 %	25 km/h	9.1 °C
December	52 mm	11	7.3 h/day	81 %	86 %	27 km/h	6.2 °C

How Gdynia compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Gdynia	21 °C	-1.8 °C	705 mm	10
Gdańsk · Poland	22 °C	-2.3 °C	600 mm	18
Kaliningrad · Russia	23 °C	-3.6 °C	696 mm	23
Olsztyn · Poland	22 °C	-4.6 °C	655 mm	21
Bydgoszcz · Poland	24 °C	-3.1 °C	587 mm	31
Klaipėda · Lithuania	21 °C	-3.0 °C	727 mm	12

Planning a trip? See the best time to visit Gdynia.

QuestionsCommon questions about Gdynia’s climate

When is the best time to visit Gdynia?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, August is the warmest month and February the driest. The month-by-month table above has the full picture.

How hot does Gdynia get?

In August, the warmest month, daily highs average 21 °C. About 1 days a year pass 30 °C. The highest value in the 1991–2020 record is 34 °C.

How cold does it get in winter?

Nights average -1.8 °C in January, the coldest month. A normal year has 72 nights below freezing.

Which month is wettest in Gdynia?

July, averaging 92 mm over 13 days with rain. The driest month is February with 38 mm. The year as a whole averages 705 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Gdynia rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 54.519°, 18.532° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. 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.