Average sea water temperature in May:
+39.4°F
| Minimum sea water temperature in May: | 57.2°F |
| Maximum sea water temperature in May: | 29.8°F |
Daily sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 41.1°F. The highest and lowest sea temperatures during the month were 51.1°F and 36.7°F.
Monthly sea water temperature in Oulu, °F
Which Finland resorts have warmest sea in May?
| Place name | May 2026 | May 2025 |
|---|---|---|
| Lahti | 49.7°F | 47.5°F |
| Porvoo | 48.9°F | 47.1°F |
| Lappeenranta | 48.4°F | 46.3°F |
| Vaasa | 48.0°F | 47.1°F |
| Pori | 47.2°F | 46.9°F |
| Seinajoki | 46.5°F | 45.2°F |
| Helsinki | 46.3°F | 46.3°F |
| Espoo | 46.2°F | 46.2°F |
| Turku | 46.0°F | 45.7°F |
| Juvaskyla | 46.0°F | 43.8°F |
| Vantaa | 45.9°F | 46.0°F |
| Kotka | 45.5°F | 45.7°F |
| Savolinna | 45.5°F | 43.1°F |
| Imatra | 44.7°F | 43.1°F |
| Oulu | 41.1°F | 39.1°F |
| Kemi | 38.5°F | 37.6°F |
| Koli National Park | 38.5°F | 39.1°F |
| Saariselka | 38.0°F | 38.1°F |
Best time for vacation in Oulu
Oulu on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Oulu
Local time: 15:14
October 20, tuesday
1800
43°F
N
7 mph
7 mph
2100
39°F
N
8 mph
8 mph
October 21, wednesday
0000
37°F
N
8 mph
8 mph
0300
36°F
N
7 mph
7 mph
0600
34°F
N
8 mph
8 mph
0900
34°F
NW
8 mph
8 mph
1200
39°F
NW
9 mph
9 mph
1500
43°F
NW
9 mph
9 mph
