Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

53.4°F

Measurement Time: Tuesday, September 15, 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

57°F
Mostly Sunny
Mostly Sunny
83%
W 15 mph
52°F

Weather Forecast

Sunny
This Afternoon
58°F - Sunny
Mostly Clear
Tonight
47°F - Mostly Clear
Mostly Sunny
Wednesday
56°F - Mostly Sunny
Chance Rain Showers
Wednesday Night
48°F - Chance Rain Showers
Mostly Sunny
Thursday
61°F - Mostly Sunny
Mostly Cloudy
Thursday Night
47°F - Mostly Cloudy
Mostly Cloudy then Slight Chance Rain Showers
Friday
56°F - Mostly Cloudy then Slight Chance Rain Showers
Slight Chance Rain Showers
Friday Night
49°F - Slight Chance Rain Showers
Partly Sunny
Saturday
58°F - Partly Sunny
Mostly Cloudy
Saturday Night
49°F - Mostly Cloudy
Mostly Cloudy
Sunday
57°F - Mostly Cloudy
Mostly Cloudy then Slight Chance Rain Showers
Sunday Night
48°F - Mostly Cloudy then Slight Chance Rain Showers
Slight Chance Rain Showers then Partly Sunny
Monday
59°F - Slight Chance Rain Showers then Partly Sunny
Partly Cloudy
Monday Night
48°F - Partly Cloudy

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: 6:39 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

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

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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