Current sea water temperature:
+46.6°F
| Minimum sea water temperature in May: | 55.2°F |
| Maximum sea water temperature in May: | 31.3°F |
| Average sea water temperature in May: | 40.8°F |
| more information | |
14 days
forecast
forecast
| Seinajoki |
monthly
weather
weather
| Seinajoki |
Sea water temperature for the last 10 days:
| May 17 | 46.6°F | May 12 | 46.0°F |
| May 16 | 45.1°F | May 11 | 44.4°F |
| May 15 | 45.7°F | May 10 | 42.8°F |
| May 14 | 44.1°F | May 9 | 43.7°F |
| May 13 | 45.1°F | May 8 | 43.3°F |
Monthly sea water temperature, °F
When is the warmest sea in Seinajoki?
Based on the data about daily sea water temperature for the last three years the warmest sea in Seinajoki was noticed in August, July and September.
Monthly Sea Temperatures in Seinajoki, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 63.4°F. The highest and lowest sea temperatures during the month were 71.2°F and 58.5°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 65.1°F. The highest and lowest sea temperatures during the month were 74.1°F and 56.7°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 56.7°F. The highest and lowest sea temperatures during the month were 61.9°F and 51.6°F.
current
weather
weather
| Seinajoki |
weather in
May
May
| Seinajoki |
Best time for vacation in Seinajoki
Seinajoki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Seinajoki
Local time: 21:36
May 18, monday
0000
45°F
N
6 mph
6 mph
0300
43°F
N
6 mph
6 mph
0600
43°F
N
5 mph
5 mph
0900
55°F
NE
6 mph
6 mph
1200
61°F
NE
5 mph
5 mph
1500
66°F
NE
3 mph
3 mph
1800
64°F
W
2 mph
2 mph
2100
57°F
S
4 mph
4 mph
