Average sea water temperature in September:
+58.8°F
| Minimum sea water temperature in September: | 66.4°F |
| Maximum sea water temperature in September: | 45.7°F |
Daily sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 56.4°F. The highest and lowest sea temperatures during the month were 63.0°F and 45.7°F.
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| Grand Marais |
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Monthly sea water temperature in Grand Marais, °F
Which USA resorts have warmest sea in September?
| Place name | September 2026 | September 2025 |
|---|---|---|
| Key West | 87.9°F | 86.9°F |
| Key Largo | 87.3°F | 86.6°F |
| Naples | 87.2°F | 86.1°F |
| Siesta Key | 87.1°F | 84.9°F |
| Houston | 87.0°F | 84.9°F |
| Sarasota | 87.0°F | 84.8°F |
| Corpus Christi | 86.9°F | 85.8°F |
| Fort Lauderdale | 86.6°F | 86.4°F |
| West Palm Beach | 86.6°F | 86.2°F |
| Cape Coral | 86.6°F | 85.2°F |
| New Orleans | 86.5°F | 84.3°F |
| Tampa | 86.2°F | 84.3°F |
| Clearwater Beach | 86.2°F | 84.0°F |
| Orange Beach | 86.1°F | 84.0°F |
| Pensacola Beach | 86.1°F | 83.9°F |
| Panama City Beach | 85.9°F | 83.4°F |
| Fort Walton Beach | 85.9°F | 83.3°F |
| Pensacola | 85.9°F | 83.9°F |
| Miami Beach | 85.9°F | 86.1°F |
| Destin | 85.8°F | 83.1°F |
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: 12:35
September 28, monday
1500
57°F
NW
5 mph
5 mph
1800
57°F
SW
5 mph
5 mph
2100
55°F
SW
6 mph
6 mph
September 29, tuesday
0000
55°F
SW
7 mph
7 mph
0300
55°F
SW
4 mph
4 mph
0600
55°F
W
4 mph
4 mph
0900
57°F
NW
2 mph
2 mph
1200
59°F
N
7 mph
7 mph
