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

61°F
Chance Rain Showers
Chance Rain Showers
70%
N 5 mph
52°F

Weather Forecast

Chance Rain Showers then Patchy Fog
Tonight
49°F - Chance Rain Showers then Patchy Fog
Sunny
Friday
58°F - Sunny
Partly Cloudy
Friday Night
51°F - Partly Cloudy
Chance Rain Showers
Saturday
61°F - Chance Rain Showers
Chance Rain Showers
Saturday Night
56°F - Chance Rain Showers
Chance Showers And Thunderstorms
Sunday
63°F - Chance Showers And Thunderstorms
Chance Rain Showers then Chance Showers And Thunderstorms
Sunday Night
57°F - Chance Rain Showers then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Monday
69°F - Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms
Monday Night
57°F - Slight Chance Showers And Thunderstorms
Slight Chance Rain Showers then Partly Sunny
Tuesday
71°F - Slight Chance Rain Showers then Partly Sunny
Mostly Cloudy
Tuesday Night
57°F - Mostly Cloudy
Partly Sunny
Wednesday
69°F - Partly Sunny
Mostly Cloudy then Slight Chance Showers And Thunderstorms
Wednesday Night
56°F - Mostly Cloudy then Slight Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms
Thursday
68°F - Slight Chance Showers And Thunderstorms

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:02 PM
Sunset: 7:51 PM
Daylight: 13 hrs 38 mins
Moonrise: 7:42 PM
Moon Transit: 12:20 AM
Moonset: 5:28 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:10 AM - 2:40 PM

Minor Periods

7:12 PM - 8:42 PM
4:58 AM - 6:28 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: 6:13 AM
Sun Transit: 1:02 PM
Sunset: 7:51 PM
Daylight: 13 hrs 38 mins
Moonrise: 7:42 PM
Moon Transit: 12:20 AM
Moonset: 5:28 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:10 AM - 2:40 PM

Minor Periods

7:12 PM - 8:42 PM
4:58 AM - 6:28 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: 6:15 AM
Sun Transit: 1:02 PM
Sunset: 7:49 PM
Daylight: 13 hrs 35 mins
Moonrise: 7:58 PM
Moon Transit: 1:04 AM
Moonset: 6:41 AM
Moon Phase: Full
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:34 AM - 3:04 AM
12:54 AM - 3:24 PM

Minor Periods

7:28 PM - 8:58 PM
6:11 AM - 7:41 AM

Action Rating: 5 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: 6:15 AM
Sun Transit: 1:02 PM
Sunset: 7:49 PM
Daylight: 13 hrs 35 mins
Moonrise: 7:58 PM
Moon Transit: 1:04 AM
Moonset: 6:41 AM
Moon Phase: Full
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:34 AM - 3:04 AM
12:54 AM - 3:24 PM

Minor Periods

7:28 PM - 8:58 PM
6:11 AM - 7:41 AM

Action Rating: 5 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: 6:16 AM
Sun Transit: 1:02 PM
Sunset: 7:48 PM
Daylight: 13 hrs 32 mins
Moonrise: 8:13 PM
Moon Transit: 1:48 AM
Moonset: 7:53 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:18 AM - 3:48 AM
12:00 AM - 12:00 AM

Minor Periods

7:43 PM - 9:13 PM
7:23 AM - 8:53 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: 6:16 AM
Sun Transit: 1:02 PM
Sunset: 7:48 PM
Daylight: 13 hrs 32 mins
Moonrise: 8:13 PM
Moon Transit: 1:48 AM
Moonset: 7:53 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:18 AM - 3:48 AM
12:00 AM - 12:00 AM

Minor Periods

7:43 PM - 9:13 PM
7:23 AM - 8:53 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: 6:17 AM
Sun Transit: 1:01 PM
Sunset: 7:46 PM
Daylight: 13 hrs 28 mins
Moonrise: 8:29 PM
Moon Transit: 12:00 AM
Moonset: 9:08 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

7:59 PM - 9:29 PM
8:38 AM - 10:08 AM

Action Rating: 3 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: 6:17 AM
Sun Transit: 1:01 PM
Sunset: 7:46 PM
Daylight: 13 hrs 28 mins
Moonrise: 8:29 PM
Moon Transit: 12:00 AM
Moonset: 9:08 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

7:59 PM - 9:29 PM
8:38 AM - 10:08 AM

Action Rating: 3 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: 6:19 AM
Sun Transit: 1:01 PM
Sunset: 7:44 PM
Daylight: 13 hrs 25 mins
Moonrise: 8:48 PM
Moon Transit: 3:18 AM
Moonset: 10:24 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
3:09 PM - 5:39 PM

Minor Periods

8:18 PM - 9:48 PM
9:54 AM - 11:24 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: 6:19 AM
Sun Transit: 1:01 PM
Sunset: 7:44 PM
Daylight: 13 hrs 25 mins
Moonrise: 8:48 PM
Moon Transit: 3:18 AM
Moonset: 10:24 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
3:09 PM - 5:39 PM

Minor Periods

8:18 PM - 9:48 PM
9:54 AM - 11:24 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: 6:20 AM
Sun Transit: 1:01 PM
Sunset: 7:42 PM
Daylight: 13 hrs 21 mins
Moonrise: 9:10 PM
Moon Transit: 4:06 AM
Moonset: 11:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:36 AM - 6:06 AM
3:59 PM - 6:29 PM

Minor Periods

8:40 PM - 10:10 PM
11:13 AM - 12:43 AM

Action Rating: 3 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: 6:20 AM
Sun Transit: 1:01 PM
Sunset: 7:42 PM
Daylight: 13 hrs 21 mins
Moonrise: 9:10 PM
Moon Transit: 4:06 AM
Moonset: 11:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:36 AM - 6:06 AM
3:59 PM - 6:29 PM

Minor Periods

8:40 PM - 10:10 PM
11:13 AM - 12:43 AM

Action Rating: 3 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: 6:21 AM
Sun Transit: 1:00 PM
Sunset: 7:40 PM
Daylight: 13 hrs 18 mins
Moonrise: 9:39 PM
Moon Transit: 4:58 AM
Moonset: 1:05 PM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:28 AM - 6:58 AM
4:53 PM - 7:23 PM

Minor Periods

9:09 PM - 10:39 PM
12:35 AM - 2:05 PM

Action Rating: 3 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: 6:21 AM
Sun Transit: 1:00 PM
Sunset: 7:40 PM
Daylight: 13 hrs 18 mins
Moonrise: 9:39 PM
Moon Transit: 4:58 AM
Moonset: 1:05 PM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:28 AM - 6:58 AM
4:53 PM - 7:23 PM

Minor Periods

9:09 PM - 10:39 PM
12:35 AM - 2:05 PM

Action Rating: 3 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: 6:23 AM
Sun Transit: 1:00 PM
Sunset: 7:38 PM
Daylight: 13 hrs 15 mins
Moonrise: 10:19 PM
Moon Transit: 5:55 AM
Moonset: 2:26 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:25 AM - 7:55 AM
5:52 PM - 8:22 PM

Minor Periods

9:49 PM - 11:19 PM
1:56 PM - 3:26 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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