Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

53.1°F

Measurement Time: Friday, September 18, 2026, 2:18 PM CDT

Temperature Locations

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Local Points of Interest

Lake Superior; Grand Marais Campground and Marina; Grand Marais Municipal Arena

Grand Marais Harbor

Station Name: 9099090 - Grand Marais, MN
Station Type: Fixed
Data Source: National Data Buoy Center

Elevation Above Sea Level: 617 feet

Nearest Address:
391 MN-61
Grand Marais, MN 55604
Cook County

GPS Coordinates: 47.749, -90.341

Nearby Water Temperatures

Lake Superior, Grand Marais, MN (0.6 mi)
Poplar River, Lutsen, MN (18.8 mi)
Grand Portage River, Grand Portage, MN (33.9 mi)
Lake Superior, Lake Superior, MI (38.4 mi)
Baptism River, Illgen City, MN (49.1 mi)
Kawishiwi River, Ely, MN (56.7 mi)
Washington Creek, Windigo, MI (56.7 mi)
Dunka River, Babbitt, MN (70.8 mi)
Dunka River, Babbitt, MN (71.1 mi)
Partrige River, Babbitt, MN (74.2 mi)
Lake Superior, Two Harbors, MN (79.9 mi)
Saint Louis River, Hoyt Lakes, MN (81.3 mi)
Chequamegon Bay, Ashland, WI (81.3 mi)
Presque Isle River, Tula, MI (87.2 mi)
Lake Superior, Calumet, MI (87.4 mi)

Weather for Grand Marais, Minnesota

Current Weather

52°F
Mostly Cloudy
Mostly Cloudy
85%
E 10 mph
48°F

Weather Forecast

Mostly Cloudy
Tonight
47°F - Mostly Cloudy
Partly Sunny
Saturday
59°F - Partly Sunny
Patchy Fog then Mostly Cloudy
Saturday Night
49°F - Patchy Fog then Mostly Cloudy
Mostly Sunny
Sunday
58°F - Mostly Sunny
Mostly Cloudy
Sunday Night
45°F - Mostly Cloudy
Partly Sunny
Monday
53°F - Partly Sunny
Partly Cloudy
Monday Night
44°F - Partly Cloudy
Sunny
Tuesday
57°F - Sunny
Mostly Clear
Tuesday Night
46°F - Mostly Clear
Sunny
Wednesday
58°F - Sunny
Partly Cloudy
Wednesday Night
47°F - Partly Cloudy
Mostly Sunny
Thursday
61°F - Mostly Sunny
Partly Cloudy
Thursday Night
49°F - Partly Cloudy
Mostly Sunny
Friday
63°F - Mostly Sunny

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

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: 6:44 AM
Sun Transit: 12:55 AM
Sunset: 7:05 PM
Daylight: 12 hrs 21 mins
Moonrise: 4:02 PM
Moon Transit: 7:49 PM
Moonset: 11:41 PM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

6:51 AM - 9:21 AM
7:19 PM - 9:49 PM

Minor Periods

12:00 AM - 12:00 AM
3:32 PM - 5:02 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: 6:44 AM
Sun Transit: 12:55 AM
Sunset: 7:05 PM
Daylight: 12 hrs 21 mins
Moonrise: 4:02 PM
Moon Transit: 7:49 PM
Moonset: 11:41 PM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

6:51 AM - 9:21 AM
7:19 PM - 9:49 PM

Minor Periods

12:00 AM - 12:00 AM
3:32 PM - 5:02 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: 6:46 AM
Sun Transit: 12:54 AM
Sunset: 7:03 PM
Daylight: 12 hrs 17 mins
Moonrise: 4:38 PM
Moon Transit: 8:39 PM
Moonset: 12:41 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

7:42 AM - 10:12 AM
8:09 PM - 10:39 PM

Minor Periods

4:08 PM - 5:38 PM
12:00 AM - 12:00 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: 6:46 AM
Sun Transit: 12:54 AM
Sunset: 7:03 PM
Daylight: 12 hrs 17 mins
Moonrise: 4:38 PM
Moon Transit: 8:39 PM
Moonset: 12:41 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

7:42 AM - 10:12 AM
8:09 PM - 10:39 PM

Minor Periods

4:08 PM - 5:38 PM
12:00 AM - 12:00 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: 6:47 AM
Sun Transit: 12:54 AM
Sunset: 7:01 PM
Daylight: 12 hrs 14 mins
Moonrise: 5:06 PM
Moon Transit: 9:27 PM
Moonset: 12:48 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

8:31 AM - 11:01 AM
8:57 PM - 11:27 PM

Minor Periods

4:36 PM - 6:06 PM
12:18 AM - 1:48 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: 6:47 AM
Sun Transit: 12:54 AM
Sunset: 7:01 PM
Daylight: 12 hrs 14 mins
Moonrise: 5:06 PM
Moon Transit: 9:27 PM
Moonset: 12:48 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

8:31 AM - 11:01 AM
8:57 PM - 11:27 PM

Minor Periods

4:36 PM - 6:06 PM
12:18 AM - 1:48 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: 6:48 AM
Sun Transit: 12:54 AM
Sunset: 6:59 PM
Daylight: 12 hrs 10 mins
Moonrise: 5:28 PM
Moon Transit: 10:13 PM
Moonset: 1:58 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

9:18 AM - 11:48 AM
12:00 AM - 12:00 AM

Minor Periods

4:58 PM - 6:28 PM
1:28 AM - 2:58 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: 6:48 AM
Sun Transit: 12:54 AM
Sunset: 6:59 PM
Daylight: 12 hrs 10 mins
Moonrise: 5:28 PM
Moon Transit: 10:13 PM
Moonset: 1:58 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

9:18 AM - 11:48 AM
12:00 AM - 12:00 AM

Minor Periods

4:58 PM - 6:28 PM
1:28 AM - 2:58 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: 6:50 AM
Sun Transit: 12:53 AM
Sunset: 6:57 PM
Daylight: 12 hrs 7 mins
Moonrise: 5:47 PM
Moon Transit: 10:58 PM
Moonset: 3:10 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

10:03 AM - 12:33 AM
12:00 AM - 12:00 AM

Minor Periods

5:17 PM - 6:47 PM
2:40 AM - 4:10 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: 6:50 AM
Sun Transit: 12:53 AM
Sunset: 6:57 PM
Daylight: 12 hrs 7 mins
Moonrise: 5:47 PM
Moon Transit: 10:58 PM
Moonset: 3:10 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

10:03 AM - 12:33 AM
12:00 AM - 12:00 AM

Minor Periods

5:17 PM - 6:47 PM
2:40 AM - 4:10 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: 6:51 AM
Sun Transit: 12:53 AM
Sunset: 6:55 PM
Daylight: 12 hrs 4 mins
Moonrise: 6:03 PM
Moon Transit: 11:42 PM
Moonset: 4:23 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

10:47 AM - 1:17 PM
12:00 AM - 12:00 AM

Minor Periods

5:33 PM - 7:03 PM
3:53 AM - 5:23 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: 6:51 AM
Sun Transit: 12:53 AM
Sunset: 6:55 PM
Daylight: 12 hrs 4 mins
Moonrise: 6:03 PM
Moon Transit: 11:42 PM
Moonset: 4:23 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

10:47 AM - 1:17 PM
12:00 AM - 12:00 AM

Minor Periods

5:33 PM - 7:03 PM
3:53 AM - 5:23 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: 6:53 AM
Sun Transit: 12:52 AM
Sunset: 6:53 PM
Daylight: 12 hrs mins
Moonrise: 6:19 PM
Moon Transit: 12:00 AM
Moonset: 5:35 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:49 PM - 7:19 PM
5:05 AM - 6:35 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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