Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

54.3°F

Measurement Time: Wednesday, September 9, 2026, 6:18 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

58°F
Sunny
Sunny
82%
W 15 mph
53°F

Weather Forecast

Chance Rain Showers then Mostly Sunny
Today
64°F - Chance Rain Showers then Mostly Sunny
Mostly Clear
Tonight
50°F - Mostly Clear
Sunny
Thursday
61°F - Sunny
Partly Cloudy
Thursday Night
55°F - Partly Cloudy
Partly Sunny then Chance Showers And Thunderstorms
Friday
68°F - Partly Sunny then Chance Showers And Thunderstorms
Showers And Thunderstorms
Friday Night
57°F - Showers And Thunderstorms
Showers And Thunderstorms Likely then Mostly Sunny
Saturday
63°F - Showers And Thunderstorms Likely then Mostly Sunny
Partly Cloudy
Saturday Night
49°F - Partly Cloudy
Partly Sunny then Slight Chance Rain Showers
Sunday
60°F - Partly Sunny then Slight Chance Rain Showers
Chance Rain Showers
Sunday Night
49°F - Chance Rain Showers
Rain Showers Likely
Monday
61°F - Rain Showers Likely
Rain Showers Likely
Monday Night
51°F - Rain Showers Likely
Chance Rain Showers then Partly Sunny
Tuesday
62°F - Chance Rain Showers then Partly Sunny
Partly Cloudy
Tuesday Night
49°F - Partly Cloudy

Astronomical

Sunrise: 6:31 AM
Sun Transit: 12:58 AM
Sunset: 7:25 PM
Daylight: 12 hrs 54 mins
Moonrise: 4:31 AM
Moon Transit: 11:48 AM
Moonset: 6:48 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:18 AM - 1:48 PM

Minor Periods

6:18 PM - 7:48 PM
4:01 AM - 5:31 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: 6:31 AM
Sun Transit: 12:58 AM
Sunset: 7:25 PM
Daylight: 12 hrs 54 mins
Moonrise: 4:31 AM
Moon Transit: 11:48 AM
Moonset: 6:48 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:18 AM - 1:48 PM

Minor Periods

6:18 PM - 7:48 PM
4:01 AM - 5:31 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: 6:31 AM
Sun Transit: 12:58 AM
Sunset: 7:25 PM
Daylight: 12 hrs 54 mins
Moonrise: 4:31 AM
Moon Transit: 11:48 AM
Moonset: 6:48 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:18 AM - 1:48 PM

Minor Periods

6:18 PM - 7:48 PM
4:01 AM - 5:31 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: 6:32 AM
Sun Transit: 12:58 AM
Sunset: 7:23 PM
Daylight: 12 hrs 51 mins
Moonrise: 5:52 AM
Moon Transit: 12:37 AM
Moonset: 7:06 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:07 AM - 2:37 PM

Minor Periods

6:36 PM - 8:06 PM
5:22 AM - 6:52 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: 6:32 AM
Sun Transit: 12:58 AM
Sunset: 7:23 PM
Daylight: 12 hrs 51 mins
Moonrise: 5:52 AM
Moon Transit: 12:37 AM
Moonset: 7:06 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:07 AM - 2:37 PM

Minor Periods

6:36 PM - 8:06 PM
5:22 AM - 6:52 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: 6:34 AM
Sun Transit: 12:57 AM
Sunset: 7:21 PM
Daylight: 12 hrs 48 mins
Moonrise: 7:09 AM
Moon Transit: 1:23 PM
Moonset: 7:22 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

12:27 AM - 2:57 AM
12:53 AM - 3:23 PM

Minor Periods

6:52 PM - 8:22 PM
6:39 AM - 8:09 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: 6:34 AM
Sun Transit: 12:57 AM
Sunset: 7:21 PM
Daylight: 12 hrs 48 mins
Moonrise: 7:09 AM
Moon Transit: 1:23 PM
Moonset: 7:22 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

12:27 AM - 2:57 AM
12:53 AM - 3:23 PM

Minor Periods

6:52 PM - 8:22 PM
6:39 AM - 8:09 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: 6:35 AM
Sun Transit: 12:57 AM
Sunset: 7:19 PM
Daylight: 12 hrs 44 mins
Moonrise: 8:25 AM
Moon Transit: 2:08 PM
Moonset: 7:38 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:12 AM - 3:42 AM
1:38 PM - 4:08 PM

Minor Periods

7:08 PM - 8:38 PM
7:55 AM - 9:25 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: 6:35 AM
Sun Transit: 12:57 AM
Sunset: 7:19 PM
Daylight: 12 hrs 44 mins
Moonrise: 8:25 AM
Moon Transit: 2:08 PM
Moonset: 7:38 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:12 AM - 3:42 AM
1:38 PM - 4:08 PM

Minor Periods

7:08 PM - 8:38 PM
7:55 AM - 9:25 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: 6:36 AM
Sun Transit: 12:57 AM
Sunset: 7:17 PM
Daylight: 12 hrs 41 mins
Moonrise: 9:39 AM
Moon Transit: 2:53 PM
Moonset: 7:56 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

1:57 AM - 4:27 AM
2:23 PM - 4:53 PM

Minor Periods

7:26 PM - 8:56 PM
9:09 AM - 10:39 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: 6:36 AM
Sun Transit: 12:57 AM
Sunset: 7:17 PM
Daylight: 12 hrs 41 mins
Moonrise: 9:39 AM
Moon Transit: 2:53 PM
Moonset: 7:56 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

1:57 AM - 4:27 AM
2:23 PM - 4:53 PM

Minor Periods

7:26 PM - 8:56 PM
9:09 AM - 10:39 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: 6:38 AM
Sun Transit: 12:56 AM
Sunset: 7:15 PM
Daylight: 12 hrs 37 mins
Moonrise: 10:53 AM
Moon Transit: 3:39 PM
Moonset: 8:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
3:09 PM - 5:39 PM

Minor Periods

7:46 PM - 9:16 PM
10:23 AM - 11:53 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: 6:38 AM
Sun Transit: 12:56 AM
Sunset: 7:15 PM
Daylight: 12 hrs 37 mins
Moonrise: 10:53 AM
Moon Transit: 3:39 PM
Moonset: 8:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
3:09 PM - 5:39 PM

Minor Periods

7:46 PM - 9:16 PM
10:23 AM - 11:53 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: 6:39 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

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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