Average sea water temperature in May:
+47.5°F
| Minimum sea water temperature in May: | 64.4°F |
| Maximum sea water temperature in May: | 34.7°F |
Daily sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 46.0°F. The highest and lowest sea temperatures during the month were 50.4°F and 41.0°F.
Monthly sea water temperature in Lahti, °F
Which Finland resorts have warmest sea in May?
| Place name | May 2026 | May 2025 |
|---|---|---|
| Lahti | 46.0°F | 47.5°F |
| Porvoo | 45.4°F | 47.1°F |
| Lappeenranta | 45.0°F | 46.3°F |
| Espoo | 44.3°F | 46.2°F |
| Vaasa | 44.2°F | 47.1°F |
| Helsinki | 44.1°F | 46.3°F |
| Seinajoki | 43.9°F | 45.2°F |
| Vantaa | 43.9°F | 46.0°F |
| Turku | 43.2°F | 45.7°F |
| Kotka | 42.9°F | 45.7°F |
| Pori | 42.6°F | 46.9°F |
| Juvaskyla | 41.9°F | 43.8°F |
| Savolinna | 41.8°F | 43.1°F |
| Imatra | 40.8°F | 43.1°F |
| Oulu | 39.6°F | 39.1°F |
| Saariselka | 36.7°F | 38.1°F |
| Kemi | 34.4°F | 37.6°F |
| Koli National Park | 34.0°F | 39.1°F |
Best time for vacation in Lahti
Lahti on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Lahti
Local time: 15:55
May 18, monday
1800
61°F
SW
6 mph
6 mph
2100
55°F
SW
5 mph
5 mph
May 19, tuesday
0000
52°F
S
6 mph
6 mph
0300
50°F
S
9 mph
9 mph
0600
50°F
SW
9 mph
9 mph
0900
57°F
W
9 mph
9 mph
1200
72°F
NW
9 mph
9 mph
1500
77°F
NW
11 mph
11 mph
