17.05
sun
sun
Day
46°F
NE 9 mph
Precip.
0%
0%
Night
45°F
E 8 mph
Precip.
0%
0%
18.05
mon
mon
Day
50°F
W 5 mph
Precip.
0%
0%
Night
52°F
SW 13 mph
Precip.
66%
66%
19.05
tue
tue
Day
50°F
W 11 mph
Precip.
0%
0%
Night
46°F
NE 11 mph
Precip.
79%
79%
20.05
wed
wed
Day
50°F
NE 9 mph
Precip.
0%
0%
Night
50°F
SE 8 mph
Precip.
0%
0%
21.05
thu
thu
Day
52°F
NE 7 mph
Precip.
0%
0%
Night
48°F
E 7 mph
Precip.
0%
0%
22.05
fri
fri
Day
50°F
NE 9 mph
Precip.
69%
69%
Night
50°F
SE 9 mph
Precip.
0%
0%
23.05
sat
sat
Day
55°F
NE 12 mph
Precip.
0%
0%
Night
48°F
NE 10 mph
Precip.
100%
100%
24.05
sun
sun
Day
52°F
S 6 mph
Precip.
86%
86%
Night
50°F
S 11 mph
Precip.
0%
0%
25.05
mon
mon
Day
57°F
S 9 mph
Precip.
100%
100%
Night
48°F
SW 9 mph
Precip.
0%
0%
26.05
tue
tue
Day
50°F
SW 7 mph
Precip.
0%
0%
Night
46°F
S 9 mph
Precip.
0%
0%
27.05
wed
wed
Day
43°F
SW 19 mph
Precip.
100%
100%
Night
46°F
SW 17 mph
Precip.
100%
100%
28.05
thu
thu
Day
48°F
W 8 mph
Precip.
63%
63%
Night
50°F
S 14 mph
Precip.
100%
100%
29.05
fri
fri
Day
50°F
NE 19 mph
Precip.
75%
75%
Night
48°F
E 7 mph
Precip.
0%
0%
30.05
sat
sat
Day
52°F
N 7 mph
Precip.
0%
0%
Night
50°F
NE 12 mph
Precip.
0%
0%
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 45.2°F. The highest and lowest sea temperatures during the month were 50.4°F and 39.4°F.
Air temperature in Porvoo, °F
Precipitation total in Porvoo, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Porvoo
Porvoo on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Porvoo
Local time: 22:13
May 18, monday
0000
45°F
E
8 mph
8 mph
0300
43°F
SE
6 mph
6 mph
0600
43°F
S
6 mph
6 mph
0900
48°F
SW
6 mph
6 mph
1200
50°F
W
5 mph
5 mph
1500
52°F
SW
4 mph
4 mph
1800
54°F
SW
7 mph
7 mph
2100
54°F
SW
12 mph
12 mph
