Current Sea Water Temperature:
+46.2°F
| Maximum Sea Water Temperature in October: | 65.4°F |
| Minimum Sea Water Temperature in October: | 44.4°F |
| Average water temperature in October: | 52.7°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| October 26 | 46.2°F | October 21 | 48.6°F |
| October 25 | 47.2°F | October 20 | 48.2°F |
| October 24 | 48.0°F | October 19 | 48.2°F |
| October 23 | 48.6°F | October 18 | 48.8°F |
| October 22 | 49.0°F | October 17 | 49.2°F |
When is the Warmest Sea for Grand Marais?
According to our data for the last three years for Grand Marais the highest average sea water temperature was in August, September and October.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2026 for Grand Marais was 54.3°F. The maximum and minimum values were 47.6°F and 61.4°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2026 for Grand Marais was 56.9°F. The maximum and minimum values were 45.2°F and 64.4°F respectively.
Sea Water Temperature in October
The average sea surface temperature in October 2026 for Grand Marais was 50.0°F. The maximum and minimum values were 46.2°F and 57.2°F respectively.
USA Resorts:
NAME
F°
| Boston |  |
+58 |
| Chicago | |
+58 |
| Hawaii | |
+80 |
| Houston |  |
+74 |
| Las Vegas |  |
+64 |
| Los Angeles | |
+74 |
| Maui | |
+72 |
| Miami | |
+82 |
| New York | |
+62 |
| Panama City Beach | |
+64 |
| San Diego | |
+74 |
| San Francisco | |
+60 |
| Santa Monica | |
+72 |
| Tampa | |
+72 |
| Washington | |
+58 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Grand Marais
Local time: 23:47
27 oct, tuesday
| 0000 |  |
38°F | W 9 mph |
| 0300 |  |
38°F | W 11 mph |
| 0600 | |
40°F | W 13 mph |
| 0900 |  |
40°F | W 14 mph |
| 1200 | |
40°F | W 15 mph |
| 1500 | |
42°F | W 14 mph |
| 1800 | |
44°F | NW 13 mph |
| 2100 | |
46°F | W 7 mph |