Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

53.6°F

Measurement Time: Thursday, October 1, 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
Sunny
Sunny
42%
W 10 mph
38°F

Weather Forecast

Sunny
This Afternoon
67°F - Sunny
Mostly Clear
Tonight
43°F - Mostly Clear
Sunny
Friday
53°F - Sunny
Mostly Cloudy
Friday Night
44°F - Mostly Cloudy
Chance Rain Showers
Saturday
53°F - Chance Rain Showers
Chance Rain Showers
Saturday Night
47°F - Chance Rain Showers
Mostly Sunny
Sunday
54°F - Mostly Sunny
Mostly Clear
Sunday Night
41°F - Mostly Clear
Sunny
Monday
53°F - Sunny
Partly Cloudy
Monday Night
43°F - Partly Cloudy
Mostly Sunny
Tuesday
58°F - Mostly Sunny
Mostly Cloudy
Tuesday Night
50°F - Mostly Cloudy
Mostly Sunny
Wednesday
61°F - Mostly Sunny
Partly Cloudy
Wednesday Night
47°F - Partly Cloudy

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: 7:01 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

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: 7:06 AM
Sun Transit: 12:49 AM
Sunset: 6:33 PM
Daylight: 11 hrs 27 mins
Moonrise: 12:52 AM
Moon Transit: 8:50 AM
Moonset: 4:32 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:20 AM - 10:50 AM
8:44 PM - 11:14 PM

Minor Periods

4:02 PM - 5:32 PM
12:22 AM - 1:52 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: 7:06 AM
Sun Transit: 12:49 AM
Sunset: 6:33 PM
Daylight: 11 hrs 27 mins
Moonrise: 12:52 AM
Moon Transit: 8:50 AM
Moonset: 4:32 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:20 AM - 10:50 AM
8:44 PM - 11:14 PM

Minor Periods

4:02 PM - 5:32 PM
12:22 AM - 1:52 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: 7:08 AM
Sun Transit: 12:49 AM
Sunset: 6:31 PM
Daylight: 11 hrs 23 mins
Moonrise: 2:14 AM
Moon Transit: 9:42 AM
Moonset: 4:53 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:12 AM - 11:42 AM

Minor Periods

4:23 PM - 5:53 PM
1:44 AM - 3:14 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: 7:08 AM
Sun Transit: 12:49 AM
Sunset: 6:31 PM
Daylight: 11 hrs 23 mins
Moonrise: 2:14 AM
Moon Transit: 9:42 AM
Moonset: 4:53 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:12 AM - 11:42 AM

Minor Periods

4:23 PM - 5:53 PM
1:44 AM - 3:14 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: 7:09 AM
Sun Transit: 12:49 AM
Sunset: 6:29 PM
Daylight: 11 hrs 20 mins
Moonrise: 3:33 AM
Moon Transit: 10:30 AM
Moonset: 5:11 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:00 AM - 12:30 AM

Minor Periods

4:41 PM - 6:11 PM
3:03 AM - 4:33 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: 7:09 AM
Sun Transit: 12:49 AM
Sunset: 6:29 PM
Daylight: 11 hrs 20 mins
Moonrise: 3:33 AM
Moon Transit: 10:30 AM
Moonset: 5:11 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:00 AM - 12:30 AM

Minor Periods

4:41 PM - 6:11 PM
3:03 AM - 4:33 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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