Current sea water temperature:
+47.7°F
| Minimum sea water temperature in October: | 63.9°F |
| Maximum sea water temperature in October: | 45.0°F |
| Average sea water temperature in October: | 52.4°F |
| more information | |
14 days
forecast
forecast
| Grand Marais |
monthly
weather
weather
| Grand Marais |
Sea water temperature for the last 10 days:
| October 28 | 47.7°F | October 23 | 48.7°F |
| October 27 | 48.0°F | October 22 | 49.1°F |
| October 26 | 46.6°F | October 21 | 48.7°F |
| October 25 | 47.5°F | October 20 | 48.4°F |
| October 24 | 48.2°F | October 19 | 48.4°F |
Monthly sea water temperature, °F
When is the warmest sea in Grand Marais?
Based on the data about daily sea water temperature for the last three years the warmest sea in Grand Marais was noticed in August, September and October.
Monthly Sea Temperatures in Grand Marais, °F
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 53.9°F. The highest and lowest sea temperatures during the month were 60.3°F and 47.8°F.
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 56.2°F. The highest and lowest sea temperatures during the month were 63.0°F and 45.7°F.
Sea water temperature in October, °F
Show year:
2026
2025
2024
The average sea water temperature in October of 2026 was 49.9°F. The highest and lowest sea temperatures during the month were 56.5°F and 46.6°F.
current
weather
weather
| Grand Marais |
weather in
November
November
| Grand Marais |
Best time for vacation in Grand Marais
Grand Marais on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Grand Marais
Local time: 11:35
October 29, thursday
1200
46°F
E
16 mph
16 mph
1500
45°F
E
15 mph
15 mph
1800
43°F
SE
13 mph
13 mph
2100
41°F
SE
11 mph
11 mph
October 30, friday
0000
39°F
SE
8 mph
8 mph
0300
37°F
SE
6 mph
6 mph
0600
37°F
E
5 mph
5 mph
0900
37°F
SE
2 mph
2 mph
