10.05
sun
sun
Day
48°F
W 10 mph
Precip.
0%
0%
Night
45°F
N 7 mph
Precip.
79%
79%
11.05
mon
mon
Day
50°F
N 7 mph
Precip.
0%
0%
Night
45°F
W 9 mph
Precip.
0%
0%
12.05
tue
tue
Day
48°F
W 11 mph
Precip.
100%
100%
Night
45°F
NE 6 mph
Precip.
100%
100%
13.05
wed
wed
Day
43°F
NE 8 mph
Precip.
74%
74%
Night
43°F
NE 19 mph
Precip.
100%
100%
14.05
thu
thu
Day
46°F
NE 16 mph
Precip.
74%
74%
Night
46°F
N 8 mph
Precip.
86%
86%
15.05
fri
fri
Day
54°F
NW 2 mph
Precip.
85%
85%
Night
48°F
S 6 mph
Precip.
0%
0%
16.05
sat
sat
Day
61°F
SW 9 mph
Precip.
0%
0%
Night
52°F
SW 5 mph
Precip.
79%
79%
17.05
sun
sun
Day
57°F
W 9 mph
Precip.
0%
0%
Night
50°F
W 4 mph
Precip.
89%
89%
18.05
mon
mon
Day
55°F
NW 6 mph
Precip.
0%
0%
Night
52°F
SE 1 mph
Precip.
72%
72%
19.05
tue
tue
Day
57°F
N 6 mph
Precip.
86%
86%
Night
50°F
S 2 mph
Precip.
0%
0%
20.05
wed
wed
Day
59°F
NW 3 mph
Precip.
83%
83%
Night
54°F
S 6 mph
Precip.
0%
0%
21.05
thu
thu
Day
55°F
SW 4 mph
Precip.
71%
71%
Night
55°F
SW 4 mph
Precip.
0%
0%
22.05
fri
fri
Day
55°F
SW 12 mph
Precip.
0%
0%
Night
52°F
SW 12 mph
Precip.
0%
0%
23.05
sat
sat
Day
55°F
W 16 mph
Precip.
0%
0%
Night
52°F
SW 11 mph
Precip.
0%
0%
sea water
temperature
temperature
| Helsinki |
monthly
weather
weather
| Helsinki |
current
weather
weather
| Helsinki |
7 days
forecast
forecast
| Helsinki |
Sea water temperature in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 46.3°F. The highest and lowest sea temperatures during the month were 52.3°F and 41.9°F.
Air temperature in Helsinki, °F
Precipitation total in Helsinki, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Helsinki
Helsinki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Helsinki
Local time: 10:48
May 10, sunday
1200
48°F
W
10 mph
10 mph
1500
50°F
NW
12 mph
12 mph
1800
46°F
NW
9 mph
9 mph
2100
45°F
NW
7 mph
7 mph
May 11, monday
0000
45°F
N
7 mph
7 mph
0300
43°F
N
6 mph
6 mph
0600
41°F
N
7 mph
7 mph
0900
46°F
N
9 mph
9 mph
