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
Cloudy
Conditions: Cloudy
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

Five Day Weather Forecast

Cloudy
Fri
H: 45°F
L: 39°F
Partly Cloudy
Sat
H: 43°F
L: 31°F
Patchy rain nearby
Sun
H: 47°F
L: 33°F
Moderate rain
Mon
H: 44°F
L: 40°F
Overcast
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

Astronomical

Sunrise: 7:45 AM
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%

Best Times for Fishing or Hunting

Major Periods

8:02 AM - 10:32 AM
8:28 PM - 10:58 PM

Minor Periods

3:07 PM - 4:37 PM
12:45 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%
Chance of Rain: 0%
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

Astronomical

Sunrise: 7:45 AM
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%

Best Times for Fishing or Hunting

Major Periods

8:02 AM - 10:32 AM
8:28 PM - 10:58 PM

Minor Periods

3:07 PM - 4:37 PM
12:45 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%
Chance of Rain: 0%
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

Astronomical

Sunrise: 7:46 AM
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%

Best Times for Fishing or Hunting

Major Periods

8:49 AM - 11:19 AM
9:15 PM - 11:45 PM

Minor Periods

3:24 PM - 4:54 PM
2:04 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%
Chance of Rain: 80%
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

Astronomical

Sunrise: 7:48 AM
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%

Best Times for Fishing or Hunting

Major Periods

11:01 AM - 1:31 PM
11:01 AM - 1:31 PM

Minor Periods

3:41 PM - 5:11 PM
3:23 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%
Chance of Rain: 54%
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

Astronomical

Sunrise: 7:49 AM
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%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

3:59 PM - 5:29 PM
4:45 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%
Chance of Rain: 0%
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

Astronomical

Sunrise: 7:51 AM
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%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:19 AM - 1:49 PM

Minor Periods

4:20 PM - 5:50 PM
6:12 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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