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: 11:06
July 18, saturday
1200
63°F
SW
6 mph
6 mph
1500
57°F
SE
9 mph
9 mph
1800
55°F
SE
6 mph
6 mph
2100
55°F
SW
2 mph
2 mph
July 19, sunday
0000
54°F
NW
4 mph
4 mph
0300
54°F
SW
6 mph
6 mph
0600
54°F
SW
15 mph
15 mph
0900
54°F
SW
16 mph
16 mph
