Water Temperature of Lake Superior in Grand Marais, MN
Current Water Temperature
54.0°F
				Measurement Time: Thursday, October 30, 2025, 6:00 AM CDT
Temperature Locations
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Lake Superior
				Station Name: Grand Marais								
Data Source: USGS				
Elevation Above Sea Level: 607 feet / 185 meters
Nearest Address:
				2nd Street
					Grand Marais, MN 55604
				Cook County
GPS Coordinates: 47.7517, -90.3283
Nearby Water Temperatures
Grand Marais Harbor, Grand Marais, MN (0.6 mi)Poplar River, Lutsen, MN (19.4 mi)
Grand Portage River, Grand Portage, MN (33.3 mi)
Lake Superior, Lake Superior, MI (38.1 mi)
Baptism River, Illgen City, MN (49.7 mi)
Washington Creek, Windigo, MI (56.1 mi)
Kawishiwi River, Ely, MN (57.2 mi)
Dunka River, Babbitt, MN (71.4 mi)
Dunka River, Babbitt, MN (71.7 mi)
Partrige River, Babbitt, MN (74.9 mi)
Lake Superior, Two Harbors, MN (80.5 mi)
Chequamegon Bay, Ashland, WI (81.7 mi)
Saint Louis River, Hoyt Lakes, MN (81.9 mi)
Lake Superior, Calumet, MI (86.9 mi)
Presque Isle River, Tula, MI (87.2 mi)
Weather for Grand Marais, Minnesota
Current Weather
48°F
				
			Conditions: Cloudy
Humidity: 56%
Feels Like: 45.9°F
Wind: ENE 4.9 mph
Wind Gusts: 5.9 mph
		
		Humidity: 56%
Feels Like: 45.9°F
Wind: ENE 4.9 mph
Wind Gusts: 5.9 mph
			Pressure: 29.86 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0.6
	Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0.6
Five Day Weather Forecast

Fri
H: 45°F
L: 39°F

Sat
H: 43°F
L: 31°F

Sun
H: 47°F
L: 33°F

Mon
H: 44°F
L: 40°F

Tue
H: 42°F
L: 35°F
Air Quality
PM2.5:
					
						1.18 μg/m3
						
					
				
										PM10:
					
						1.18 μg/m3
						
					
				
					
			Carbon Monoxide: 151.68 μg/m3
Nitrogen Dioxide: 1.18 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 61 μg/m3
	Nitrogen Dioxide: 1.18 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 61 μg/m3
Astronomical
			Sunrise: 7:45 AM
Sun Transit: 12:44 AM
Sunset: 5:44 PM
Daylight: 10 hrs mins
		Sun Transit: 12:44 AM
Sunset: 5:44 PM
Daylight: 10 hrs mins
			Moonrise: 3:37 PM
Moon Transit: 8:58 PM
Moonset: 1:15 AM
Moon Phase: First Quarter
Moon Illumination: 74.1%
	Moon Transit: 8:58 PM
Moonset: 1:15 AM
Moon Phase: First Quarter
Moon Illumination: 74.1%
Best Times for Fishing or Hunting
Major Periods
8:02 AM - 10:32 AM8:28 PM - 10:58 PM
Minor Periods
3:07 PM - 4:37 PM12:45 AM - 2:15 AM
Action Rating: 3 out of 5
Friday, October 31, 2025
				Weather Forecast
						Conditions: Cloudy 
Average Temperature: 40.7°F
Average Humidity: 81%
					Average Temperature: 40.7°F
Average Humidity: 81%
						Chance of Rain: 0%
Wind: 9.6 mph
UV Index: 0.3
					
					Wind: 9.6 mph
UV Index: 0.3
Air Quality
AQI:
								
									1 - Good									
							
							PM2.5:
								
									3.52 μg/m3
									
							
							PM10:
								
									3.56 μg/m3
									
							
						
							Carbon Monoxide: 153.8 μg/m3
Nitrogen Dioxide: 1.22 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 79.92 μg/m3
					Nitrogen Dioxide: 1.22 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 79.92 μg/m3
Astronomical
							Sunrise: 7:45 AM
Sun Transit: 12:44 AM
Sunset: 5:44 PM
Daylight: 10 hrs mins
						Sun Transit: 12:44 AM
Sunset: 5:44 PM
Daylight: 10 hrs mins
							Moonrise: 3:37 PM
Moon Transit: 8:58 PM
Moonset: 1:15 AM
Moon Phase: First Quarter
Moon Illumination: 74.1%
					Moon Transit: 8:58 PM
Moonset: 1:15 AM
Moon Phase: First Quarter
Moon Illumination: 74.1%
Best Times for Fishing or Hunting
Major Periods
8:02 AM - 10:32 AM8:28 PM - 10:58 PM
Minor Periods
3:07 PM - 4:37 PM12:45 AM - 2:15 AM
Action Rating: 3 out of 5
Saturday, November 1, 2025
				Weather Forecast
						Conditions: Partly Cloudy 
Average Temperature: 37.4°F
Average Humidity: 66%
					Average Temperature: 37.4°F
Average Humidity: 66%
						Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 0.3
					
					Wind: 8.9 mph
UV Index: 0.3
Air Quality
AQI:
								
									1 - Good									
							
							PM2.5:
								
									1.07 μg/m3
									
							
							PM10:
								
									1.09 μg/m3
									
							
						
							Carbon Monoxide: 138.92 μg/m3
Nitrogen Dioxide: 1 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 65.08 μg/m3
					Nitrogen Dioxide: 1 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 65.08 μg/m3
Astronomical
							Sunrise: 7:46 AM
Sun Transit: 12:44 AM
Sunset: 5:43 PM
Daylight: 9 hrs 57 mins
						Sun Transit: 12:44 AM
Sunset: 5:43 PM
Daylight: 9 hrs 57 mins
							Moonrise: 3:54 PM
Moon Transit: 9:45 PM
Moonset: 2:34 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 83.4%
					Moon Transit: 9:45 PM
Moonset: 2:34 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 83.4%
Best Times for Fishing or Hunting
Major Periods
8:49 AM - 11:19 AM9:15 PM - 11:45 PM
Minor Periods
3:24 PM - 4:54 PM2:04 AM - 3:34 AM
Action Rating: 2 out of 5
Sunday, November 2, 2025
				Weather Forecast
						Conditions: Patchy rain nearby
Average Temperature: 40.3°F
Average Humidity: 79%
					Average Temperature: 40.3°F
Average Humidity: 79%
						Chance of Rain: 80%
Wind: 20.4 mph
UV Index: 0
					
					Wind: 20.4 mph
UV Index: 0
Air Quality
AQI:
								
									1 - Good									
							
							PM2.5:
								
									4.08 μg/m3
									
							
							PM10:
								
									4.15 μg/m3
									
							
						
							Carbon Monoxide: 146.68 μg/m3
Nitrogen Dioxide: 2.03 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 68.15 μg/m3
					Nitrogen Dioxide: 2.03 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 68.15 μg/m3
Astronomical
							Sunrise: 7:48 AM
Sun Transit: 12:44 AM
Sunset: 5:41 PM
Daylight: 9 hrs 53 mins
						Sun Transit: 12:44 AM
Sunset: 5:41 PM
Daylight: 9 hrs 53 mins
							Moonrise: 4:11 PM
Moon Transit: 11:31 AM
Moonset: 3:53 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.9%
					Moon Transit: 11:31 AM
Moonset: 3:53 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.9%
Best Times for Fishing or Hunting
Major Periods
11:01 AM - 1:31 PM11:01 AM - 1:31 PM
Minor Periods
3:41 PM - 5:11 PM3:23 AM - 4:53 AM
Action Rating: 2 out of 5
Monday, November 3, 2025
				Weather Forecast
						Conditions: Moderate rain
Average Temperature: 42.6°F
Average Humidity: 84%
					Average Temperature: 42.6°F
Average Humidity: 84%
						Chance of Rain: 54%
Wind: 19.2 mph
UV Index: 2
					
					Wind: 19.2 mph
UV Index: 2
Air Quality
AQI:
								
									0 - 									
							
							PM2.5:
								
									0 μg/m3
									
							
							PM10:
								
									0 μg/m3
									
							
						
							Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
					Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
							Sunrise: 7:49 AM
Sun Transit: 12:44 AM
Sunset: 5:40 PM
Daylight: 9 hrs 50 mins
						Sun Transit: 12:44 AM
Sunset: 5:40 PM
Daylight: 9 hrs 50 mins
							Moonrise: 4:29 PM
Moon Transit: 11:25 PM
Moonset: 5:15 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.3%
					Moon Transit: 11:25 PM
Moonset: 5:15 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.3%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM12:00 AM - 12:00 AM
Minor Periods
3:59 PM - 5:29 PM4:45 AM - 6:15 AM
Action Rating: 3 out of 5
Tuesday, November 4, 2025
				Weather Forecast
						Conditions: Overcast 
Average Temperature: 38.7°F
Average Humidity: 71%
					Average Temperature: 38.7°F
Average Humidity: 71%
						Chance of Rain: 0%
Wind: 18.8 mph
UV Index: 1
					
					Wind: 18.8 mph
UV Index: 1
Air Quality
AQI:
								
									0 - 									
							
							PM2.5:
								
									0 μg/m3
									
							
							PM10:
								
									0 μg/m3
									
							
						
							Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
					Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
							Sunrise: 7:51 AM
Sun Transit: 12:44 AM
Sunset: 5:38 PM
Daylight: 9 hrs 47 mins
						Sun Transit: 12:44 AM
Sunset: 5:38 PM
Daylight: 9 hrs 47 mins
							Moonrise: 4:50 PM
Moon Transit: 12:00 AM
Moonset: 6:42 AM
Moon Phase: Full
Moon Illumination: 99.4%
					Moon Transit: 12:00 AM
Moonset: 6:42 AM
Moon Phase: Full
Moon Illumination: 99.4%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM11:19 AM - 1:49 PM
Minor Periods
4:20 PM - 5:50 PM6:12 AM - 7:42 AM
Action Rating: 5 out of 5
			
				The times presented here are based upon the solunar theory, which is the idea that the movements of
				fish and other animals are affected by the location of the sun and moon. The major periods are
				believed to be the times of the greatest animal activity and occur when the moon is directly
				overhead or underfoot (lunar transits). The minor periods also see increased activity and
				occur when the moon is rising or setting. The strongest activity occurs during full or new moons,
				and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.
			
	
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