15.09
tue
tue
Day
64°F
NE 6 mph
Precip.
2%
2%
Night
57°F
N 7 mph
Precip.
9%
9%
16.09
wed
wed
Day
64°F
N 13 mph
Precip.
15%
15%
Night
54°F
NE 6 mph
Precip.
25%
25%
17.09
thu
thu
Day
64°F
E 12 mph
Precip.
3%
3%
Night
54°F
NE 7 mph
Precip.
23%
23%
18.09
fri
fri
Day
59°F
NE 11 mph
Precip.
16%
16%
Night
57°F
E 7 mph
Precip.
18%
18%
19.09
sat
sat
Day
64°F
E 15 mph
Precip.
5%
5%
Night
55°F
NE 7 mph
Precip.
18%
18%
20.09
sun
sun
Day
63°F
NE 14 mph
Precip.
13%
13%
Night
54°F
E 9 mph
Precip.
17%
17%
21.09
mon
mon
Day
57°F
E 15 mph
Precip.
17%
17%
Night
52°F
SE 11 mph
Precip.
13%
13%
22.09
tue
tue
Day
61°F
NE 14 mph
Precip.
7%
7%
Night
48°F
E 6 mph
Precip.
13%
13%
23.09
wed
wed
Day
63°F
E 12 mph
Precip.
3%
3%
Night
57°F
E 17 mph
Precip.
20%
20%
24.09
thu
thu
Day
61°F
SE 16 mph
Precip.
11%
11%
Night
50°F
SE 8 mph
Precip.
19%
19%
25.09
fri
fri
Day
64°F
E 12 mph
Precip.
3%
3%
Night
59°F
E 14 mph
Precip.
4%
4%
26.09
sat
sat
Day
66°F
E 19 mph
Precip.
10%
10%
Night
55°F
E 9 mph
Precip.
7%
7%
27.09
sun
sun
Day
72°F
E 13 mph
Precip.
2%
2%
Night
61°F
NE 2 mph
Precip.
12%
12%
28.09
mon
mon
Day
73°F
E 10 mph
Precip.
7%
7%
Night
61°F
E 6 mph
Precip.
11%
11%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 63.7°F. The highest and lowest sea temperatures during the month were 66.6°F and 60.1°F.
Air temperature in Gdansk, °F
Precipitation total in Gdansk, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Gdansk
Gdansk on a weather map
Places in Poland:
Name
°F
24 Hours Forecast
Gdansk
Local time: 04:40
September 15, tuesday
0600
50°F
E
5 mph
5 mph
0900
57°F
E
4 mph
4 mph
1200
64°F
NE
6 mph
6 mph
1500
70°F
NE
6 mph
6 mph
1800
66°F
NE
5 mph
5 mph
2100
59°F
N
7 mph
7 mph
September 16, wednesday
0000
57°F
N
7 mph
7 mph
0300
55°F
N
8 mph
8 mph
