Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

52.5°F

Measurement Time: Tuesday, September 22, 2026, 2:18 AM 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

46°F
Sunny
Sunny
85%
NE 5 mph
41°F

Weather Forecast

Mostly Clear
Overnight
45°F - Mostly Clear
Sunny
Tuesday
53°F - Sunny
Mostly Clear
Tuesday Night
44°F - Mostly Clear
Sunny
Wednesday
53°F - Sunny
Partly Cloudy
Wednesday Night
47°F - Partly Cloudy
Mostly Cloudy then Slight Chance Rain Showers
Thursday
53°F - Mostly Cloudy then Slight Chance Rain Showers
Slight Chance Rain Showers then Mostly Cloudy
Thursday Night
49°F - Slight Chance Rain Showers then Mostly Cloudy
Partly Sunny
Friday
57°F - Partly Sunny
Mostly Cloudy
Friday Night
49°F - Mostly Cloudy
Mostly Cloudy then Slight Chance Rain Showers
Saturday
58°F - Mostly Cloudy then Slight Chance Rain Showers
Chance Rain Showers
Saturday Night
51°F - Chance Rain Showers
Chance Rain Showers then Mostly Cloudy
Sunday
60°F - Chance Rain Showers then Mostly Cloudy
Mostly Cloudy
Sunday Night
50°F - Mostly Cloudy
Mostly Sunny then Slight Chance Rain Showers
Monday
59°F - Mostly Sunny then Slight Chance Rain Showers

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: 6:48 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

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

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: 6:54 AM
Sun Transit: 12:52 AM
Sunset: 6:51 PM
Daylight: 11 hrs 57 mins
Moonrise: 6:35 PM
Moon Transit: 7:33 AM
Moonset: 6:50 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

7:03 AM - 9:33 AM
7:03 AM - 9:33 AM

Minor Periods

6:05 PM - 7:35 PM
6:20 AM - 7:50 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: 6:54 AM
Sun Transit: 12:52 AM
Sunset: 6:51 PM
Daylight: 11 hrs 57 mins
Moonrise: 6:35 PM
Moon Transit: 7:33 AM
Moonset: 6:50 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

7:03 AM - 9:33 AM
7:03 AM - 9:33 AM

Minor Periods

6:05 PM - 7:35 PM
6:20 AM - 7:50 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: 6:55 AM
Sun Transit: 12:52 AM
Sunset: 6:49 PM
Daylight: 11 hrs 54 mins
Moonrise: 6:53 PM
Moon Transit: 1:12 AM
Moonset: 8:07 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:42 AM - 3:12 AM
1:03 PM - 3:33 PM

Minor Periods

6:23 PM - 7:53 PM
7:37 AM - 9:07 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: 6:55 AM
Sun Transit: 12:52 AM
Sunset: 6:49 PM
Daylight: 11 hrs 54 mins
Moonrise: 6:53 PM
Moon Transit: 1:12 AM
Moonset: 8:07 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:42 AM - 3:12 AM
1:03 PM - 3:33 PM

Minor Periods

6:23 PM - 7:53 PM
7:37 AM - 9:07 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

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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