Current sea water temperature:
+50.4°F
| Minimum sea water temperature in May: | 59.9°F |
| Maximum sea water temperature in May: | 36.9°F |
| Average sea water temperature in May: | 45.5°F |
| more information | |
14 days
forecast
forecast
| Porvoo |
monthly
weather
weather
| Porvoo |
Sea water temperature for the last 10 days:
| May 17 | 50.4°F | May 12 | 47.7°F |
| May 16 | 47.5°F | May 11 | 45.5°F |
| May 15 | 48.4°F | May 10 | 45.5°F |
| May 14 | 46.8°F | May 9 | 45.7°F |
| May 13 | 47.1°F | May 8 | 44.4°F |
Monthly sea water temperature, °F
When is the warmest sea in Porvoo?
Based on the data about daily sea water temperature for the last three years the warmest sea in Porvoo was noticed in August, July and September.
Monthly Sea Temperatures in Porvoo, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 64.7°F. The highest and lowest sea temperatures during the month were 74.3°F and 58.3°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 64.6°F. The highest and lowest sea temperatures during the month were 73.8°F and 55.6°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 59.1°F. The highest and lowest sea temperatures during the month were 64.0°F and 52.3°F.
current
weather
weather
| Porvoo |
weather in
May
May
| Porvoo |
Best time for vacation in Porvoo
Porvoo on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Porvoo
Local time: 21:37
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
