Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

45.0°F

Measurement Time: Wednesday, August 26, 2026, 6:25 AM CDT

Temperature Locations

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Lake Superior

Station Name: Grand Marais
Data Source: USGS

Elevation Above Sea Level: 607 feet

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

59°F
Mostly Sunny
Mostly Sunny
87%
W 10 mph
55°F

Weather Forecast

Sunny
Today
66°F - Sunny
Chance Rain Showers then Mostly Cloudy
Tonight
48°F - Chance Rain Showers then Mostly Cloudy
Mostly Sunny
Sunday
60°F - Mostly Sunny
Mostly Clear
Sunday Night
46°F - Mostly Clear
Partly Sunny then Rain Showers Likely
Monday
59°F - Partly Sunny then Rain Showers Likely
Rain Showers
Monday Night
52°F - Rain Showers
Slight Chance Rain Showers then Mostly Sunny
Tuesday
62°F - Slight Chance Rain Showers then Mostly Sunny
Mostly Clear
Tuesday Night
48°F - Mostly Clear
Mostly Sunny
Wednesday
60°F - Mostly Sunny
Slight Chance Rain Showers
Wednesday Night
50°F - Slight Chance Rain Showers
Mostly Sunny
Thursday
62°F - Mostly Sunny
Partly Cloudy
Thursday Night
50°F - Partly Cloudy
Mostly Sunny
Friday
65°F - Mostly Sunny
Partly Cloudy
Friday Night
51°F - Partly Cloudy

Astronomical

Sunrise: 6:35 AM
Sun Transit: 12:57 AM
Sunset: 7:19 PM
Daylight: 12 hrs 44 mins
Moonrise: 8:25 AM
Moon Transit: 2:08 PM
Moonset: 7:38 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:12 AM - 3:42 AM
1:38 PM - 4:08 PM

Minor Periods

7:08 PM - 8:38 PM
7:55 AM - 9:25 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:35 AM
Sun Transit: 12:57 AM
Sunset: 7:19 PM
Daylight: 12 hrs 44 mins
Moonrise: 8:25 AM
Moon Transit: 2:08 PM
Moonset: 7:38 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:12 AM - 3:42 AM
1:38 PM - 4:08 PM

Minor Periods

7:08 PM - 8:38 PM
7:55 AM - 9:25 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:35 AM
Sun Transit: 12:57 AM
Sunset: 7:19 PM
Daylight: 12 hrs 44 mins
Moonrise: 8:25 AM
Moon Transit: 2:08 PM
Moonset: 7:38 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:12 AM - 3:42 AM
1:38 PM - 4:08 PM

Minor Periods

7:08 PM - 8:38 PM
7:55 AM - 9:25 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:36 AM
Sun Transit: 12:57 AM
Sunset: 7:17 PM
Daylight: 12 hrs 41 mins
Moonrise: 9:39 AM
Moon Transit: 2:53 PM
Moonset: 7:56 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

1:57 AM - 4:27 AM
2:23 PM - 4:53 PM

Minor Periods

7:26 PM - 8:56 PM
9:09 AM - 10:39 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:36 AM
Sun Transit: 12:57 AM
Sunset: 7:17 PM
Daylight: 12 hrs 41 mins
Moonrise: 9:39 AM
Moon Transit: 2:53 PM
Moonset: 7:56 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

1:57 AM - 4:27 AM
2:23 PM - 4:53 PM

Minor Periods

7:26 PM - 8:56 PM
9:09 AM - 10:39 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:38 AM
Sun Transit: 12:56 AM
Sunset: 7:15 PM
Daylight: 12 hrs 37 mins
Moonrise: 10:53 AM
Moon Transit: 3:39 PM
Moonset: 8:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
3:09 PM - 5:39 PM

Minor Periods

7:46 PM - 9:16 PM
10:23 AM - 11:53 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:38 AM
Sun Transit: 12:56 AM
Sunset: 7:15 PM
Daylight: 12 hrs 37 mins
Moonrise: 10:53 AM
Moon Transit: 3:39 PM
Moonset: 8:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
3:09 PM - 5:39 PM

Minor Periods

7:46 PM - 9:16 PM
10:23 AM - 11:53 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:39 AM
Sun Transit: 12:56 AM
Sunset: 7:13 PM
Daylight: 12 hrs 34 mins
Moonrise: 12:06 AM
Moon Transit: 4:26 PM
Moonset: 8:41 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
3:56 PM - 6:26 PM

Minor Periods

8:11 PM - 9:41 PM
11:36 AM - 1:06 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:39 AM
Sun Transit: 12:56 AM
Sunset: 7:13 PM
Daylight: 12 hrs 34 mins
Moonrise: 12:06 AM
Moon Transit: 4:26 PM
Moonset: 8:41 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
3:56 PM - 6:26 PM

Minor Periods

8:11 PM - 9:41 PM
11:36 AM - 1:06 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:40 AM
Sun Transit: 12:56 AM
Sunset: 7:11 PM
Daylight: 12 hrs 31 mins
Moonrise: 1:15 PM
Moon Transit: 5:16 PM
Moonset: 9:12 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

4:18 AM - 6:48 AM
4:46 PM - 7:16 PM

Minor Periods

8:42 PM - 10:12 PM
12:45 AM - 2:15 PM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:40 AM
Sun Transit: 12:56 AM
Sunset: 7:11 PM
Daylight: 12 hrs 31 mins
Moonrise: 1:15 PM
Moon Transit: 5:16 PM
Moonset: 9:12 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

4:18 AM - 6:48 AM
4:46 PM - 7:16 PM

Minor Periods

8:42 PM - 10:12 PM
12:45 AM - 2:15 PM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:42 AM
Sun Transit: 12:55 AM
Sunset: 7:09 PM
Daylight: 12 hrs 27 mins
Moonrise: 2:20 PM
Moon Transit: 6:07 PM
Moonset: 9:52 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

5:08 AM - 7:38 AM
5:37 PM - 8:07 PM

Minor Periods

9:22 PM - 10:52 PM
1:50 PM - 3:20 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:42 AM
Sun Transit: 12:55 AM
Sunset: 7:09 PM
Daylight: 12 hrs 27 mins
Moonrise: 2:20 PM
Moon Transit: 6:07 PM
Moonset: 9:52 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

5:08 AM - 7:38 AM
5:37 PM - 8:07 PM

Minor Periods

9:22 PM - 10:52 PM
1:50 PM - 3:20 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:43 AM
Sun Transit: 12:55 AM
Sunset: 7:07 PM
Daylight: 12 hrs 24 mins
Moonrise: 3:16 PM
Moon Transit: 6:58 PM
Moonset: 10:42 PM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

6:00 AM - 8:30 AM
6:28 PM - 8:58 PM

Minor Periods

10:12 PM - 11:42 PM
2:46 PM - 4:16 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:43 AM
Sun Transit: 12:55 AM
Sunset: 7:07 PM
Daylight: 12 hrs 24 mins
Moonrise: 3:16 PM
Moon Transit: 6:58 PM
Moonset: 10:42 PM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

6:00 AM - 8:30 AM
6:28 PM - 8:58 PM

Minor Periods

10:12 PM - 11:42 PM
2:46 PM - 4:16 PM

Action Rating: 2 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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