Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

52.7°F

Measurement Time: Monday, September 28, 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

61°F
Patchy Fog
Patchy Fog
75%
E 5 mph
53°F

Weather Forecast

Patchy Fog
This Afternoon
63°F - Patchy Fog
Patchy Fog then Cloudy
Tonight
52°F - Patchy Fog then Cloudy
Patchy Fog
Tuesday
58°F - Patchy Fog
Patchy Fog
Tuesday Night
54°F - Patchy Fog
Patchy Fog then Mostly Cloudy
Wednesday
61°F - Patchy Fog then Mostly Cloudy
Mostly Cloudy
Wednesday Night
52°F - Mostly Cloudy
Mostly Sunny
Thursday
57°F - Mostly Sunny
Partly Cloudy
Thursday Night
43°F - Partly Cloudy
Mostly Sunny
Friday
56°F - Mostly Sunny
Partly Cloudy
Friday Night
44°F - Partly Cloudy
Chance Rain Showers
Saturday
54°F - Chance Rain Showers
Chance Rain Showers
Saturday Night
44°F - Chance Rain Showers
Slight Chance Rain Showers then Mostly Sunny
Sunday
53°F - Slight Chance Rain Showers then Mostly Sunny
Partly Cloudy
Sunday Night
40°F - Partly Cloudy

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:51 AM
Sunset: 6:47 PM
Daylight: 11 hrs 50 mins
Moonrise: 7:14 PM
Moon Transit: 2:01 AM
Moonset: 9:27 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:31 AM - 4:01 AM
1:53 PM - 4:23 PM

Minor Periods

6:44 PM - 8:14 PM
8:57 AM - 10:27 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: 6:57 AM
Sun Transit: 12:51 AM
Sunset: 6:47 PM
Daylight: 11 hrs 50 mins
Moonrise: 7:14 PM
Moon Transit: 2:01 AM
Moonset: 9:27 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:31 AM - 4:01 AM
1:53 PM - 4:23 PM

Minor Periods

6:44 PM - 8:14 PM
8:57 AM - 10:27 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: 6:57 AM
Sun Transit: 12:51 AM
Sunset: 6:47 PM
Daylight: 11 hrs 50 mins
Moonrise: 7:14 PM
Moon Transit: 2:01 AM
Moonset: 9:27 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:31 AM - 4:01 AM
1:53 PM - 4:23 PM

Minor Periods

6:44 PM - 8:14 PM
8:57 AM - 10:27 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: 6:58 AM
Sun Transit: 12:51 AM
Sunset: 6:45 PM
Daylight: 11 hrs 47 mins
Moonrise: 7:42 PM
Moon Transit: 2:53 AM
Moonset: 10:50 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:23 AM - 4:53 AM
2:48 PM - 5:18 PM

Minor Periods

7:12 PM - 8:42 PM
10:20 AM - 11:50 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: 6:58 AM
Sun Transit: 12:51 AM
Sunset: 6:45 PM
Daylight: 11 hrs 47 mins
Moonrise: 7:42 PM
Moon Transit: 2:53 AM
Moonset: 10:50 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:23 AM - 4:53 AM
2:48 PM - 5:18 PM

Minor Periods

7:12 PM - 8:42 PM
10:20 AM - 11:50 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: 6:59 AM
Sun Transit: 12:51 AM
Sunset: 6:43 PM
Daylight: 11 hrs 43 mins
Moonrise: 8:19 PM
Moon Transit: 3:49 AM
Moonset: 12:13 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:19 AM - 5:49 AM
3:46 PM - 6:16 PM

Minor Periods

7:49 PM - 9:19 PM
11:43 AM - 1:13 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: 6:59 AM
Sun Transit: 12:51 AM
Sunset: 6:43 PM
Daylight: 11 hrs 43 mins
Moonrise: 8:19 PM
Moon Transit: 3:49 AM
Moonset: 12:13 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:19 AM - 5:49 AM
3:46 PM - 6:16 PM

Minor Periods

7:49 PM - 9:19 PM
11:43 AM - 1:13 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: 7:01 AM
Sun Transit: 12:50 AM
Sunset: 6:41 PM
Daylight: 11 hrs 40 mins
Moonrise: 9:09 PM
Moon Transit: 4:49 AM
Moonset: 1:30 PM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:19 AM - 6:49 AM
4:48 PM - 7:18 PM

Minor Periods

8:39 PM - 10:09 PM
1:00 PM - 2:30 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: 7:01 AM
Sun Transit: 12:50 AM
Sunset: 6:41 PM
Daylight: 11 hrs 40 mins
Moonrise: 9:09 PM
Moon Transit: 4:49 AM
Moonset: 1:30 PM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:19 AM - 6:49 AM
4:48 PM - 7:18 PM

Minor Periods

8:39 PM - 10:09 PM
1:00 PM - 2:30 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: 7:02 AM
Sun Transit: 12:50 AM
Sunset: 6:39 PM
Daylight: 11 hrs 37 mins
Moonrise: 10:14 PM
Moon Transit: 5:52 AM
Moonset: 2:36 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
5:51 PM - 8:21 PM

Minor Periods

9:44 PM - 11:14 PM
2:06 PM - 3:36 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: 7:02 AM
Sun Transit: 12:50 AM
Sunset: 6:39 PM
Daylight: 11 hrs 37 mins
Moonrise: 10:14 PM
Moon Transit: 5:52 AM
Moonset: 2:36 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
5:51 PM - 8:21 PM

Minor Periods

9:44 PM - 11:14 PM
2:06 PM - 3:36 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: 7:03 AM
Sun Transit: 12:50 AM
Sunset: 6:37 PM
Daylight: 11 hrs 33 mins
Moonrise: 11:30 PM
Moon Transit: 6:54 AM
Moonset: 3:26 PM
Moon Phase: Last Quarter
Moon Illumination: 43.9%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
6:52 PM - 9:22 PM

Minor Periods

12:00 AM - 12:00 AM
2:56 PM - 4:26 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: 7:03 AM
Sun Transit: 12:50 AM
Sunset: 6:37 PM
Daylight: 11 hrs 33 mins
Moonrise: 11:30 PM
Moon Transit: 6:54 AM
Moonset: 3:26 PM
Moon Phase: Last Quarter
Moon Illumination: 43.9%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
6:52 PM - 9:22 PM

Minor Periods

12:00 AM - 12:00 AM
2:56 PM - 4:26 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: 7:05 AM
Sun Transit: 12:50 AM
Sunset: 6:35 PM
Daylight: 11 hrs 30 mins
Moonrise: 12:30 AM
Moon Transit: 7:54 AM
Moonset: 4:04 PM
Moon Phase: Last Quarter
Moon Illumination: 32.9%

Best Times for Fishing or Hunting

Major Periods

7:24 AM - 9:54 AM
7:50 PM - 10:20 PM

Minor Periods

3:34 PM - 5:04 PM
12:00 AM - 12:00 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: 7:05 AM
Sun Transit: 12:50 AM
Sunset: 6:35 PM
Daylight: 11 hrs 30 mins
Moonrise: 12:30 AM
Moon Transit: 7:54 AM
Moonset: 4:04 PM
Moon Phase: Last Quarter
Moon Illumination: 32.9%

Best Times for Fishing or Hunting

Major Periods

7:24 AM - 9:54 AM
7:50 PM - 10:20 PM

Minor Periods

3:34 PM - 5:04 PM
12:00 AM - 12:00 AM

Action Rating: 3 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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