Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

50.5°F

Measurement Time: Friday, November 28, 2025, 2:18 AM CST

Temperature Locations

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Local Points of Interest

Lake Superior; Grand Marais Campground and Marina; Grand Marais Municipal Arena

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Grand Marais Harbor

Station Name: 9099090 - Grand Marais, MN
Station Type: Fixed
Data Source: National Data Buoy Center

Elevation Above Sea Level: 617 feet / 188 meters

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

5.5°F
Overcast
Conditions: Overcast
Humidity: 60%
Feels Like: -13.1°F
Wind: WNW 16.3 mph
Wind Gusts: 20.9 mph
Pressure: 29.94 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0

Five Day Weather Forecast

Patchy moderate snow
Fri
H: 18°F
L: -4°F
Sunny
Sat
H: 1°F
L: -5°F
Partly Cloudy
Sun
H: 14°F
L: -2°F
Overcast
Mon
H: 21°F
L: 8°F
Overcast
Tue
H: 34°F
L: 8°F

Air Quality

AQI: 1 - Good
PM2.5: 0.98 μg/m3
PM10: 1.08 μg/m3
Carbon Monoxide: 148.68 μg/m3
Nitrogen Dioxide: 0.98 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 72 μg/m3

Astronomical

Sunrise: 7:41 AM
Sun Transit: 11:55 AM
Sunset: 4:09 PM
Daylight: 8 hrs 28 mins
Moonrise: 12:13 AM
Moon Transit: 6:26 AM
Moonset: 12:27 AM
Moon Phase: Last Quarter
Moon Illumination: 40.5%

Best Times for Fishing or Hunting

Major Periods

5:56 AM - 8:26 AM
6:14 PM - 8:44 PM

Minor Periods

11:57 AM - 1:27 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, December 12, 2025

Weather Forecast

Conditions: Patchy moderate snow
Average Temperature: 13.6°F
Average Humidity: 66%
Chance of Rain: 65%
Wind: 16.8 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 1.97 μg/m3
PM10: 2.12 μg/m3
Carbon Monoxide: 158.88 μg/m3
Nitrogen Dioxide: 2.09 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 69.8 μg/m3

Astronomical

Sunrise: 7:41 AM
Sun Transit: 11:55 AM
Sunset: 4:09 PM
Daylight: 8 hrs 28 mins
Moonrise: 12:13 AM
Moon Transit: 6:26 AM
Moonset: 12:27 AM
Moon Phase: Last Quarter
Moon Illumination: 40.5%

Best Times for Fishing or Hunting

Major Periods

5:56 AM - 8:26 AM
6:14 PM - 8:44 PM

Minor Periods

11:57 AM - 1:27 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, December 13, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: -2.2°F
Average Humidity: 62%
Chance of Rain: 0%
Wind: 16.1 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 1 μg/m3
PM10: 1.09 μg/m3
Carbon Monoxide: 146.64 μg/m3
Nitrogen Dioxide: 0.96 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 74.36 μg/m3

Astronomical

Sunrise: 7:42 AM
Sun Transit: 11:55 AM
Sunset: 4:09 PM
Daylight: 8 hrs 27 mins
Moonrise: 1:20 AM
Moon Transit: 7:07 AM
Moonset: 12:41 AM
Moon Phase: Last Quarter
Moon Illumination: 29.7%

Best Times for Fishing or Hunting

Major Periods

6:37 AM - 9:07 AM
6:54 PM - 9:24 PM

Minor Periods

12:11 AM - 1:41 PM
12:50 AM - 2:20 AM

Action Rating: 2 out of 5

Sunday, December 14, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 5.3°F
Average Humidity: 70%
Chance of Rain: 0%
Wind: 19 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 1.15 μg/m3
PM10: 1.23 μg/m3
Carbon Monoxide: 147.04 μg/m3
Nitrogen Dioxide: 1.15 μg/m3
Sulphur Dioxide: 0.84 μg/m3
Ozone: 76.92 μg/m3

Astronomical

Sunrise: 7:43 AM
Sun Transit: 11:56 AM
Sunset: 4:10 PM
Daylight: 8 hrs 27 mins
Moonrise: 2:28 AM
Moon Transit: 7:47 AM
Moonset: 12:56 AM
Moon Phase: Last Quarter
Moon Illumination: 19.9%

Best Times for Fishing or Hunting

Major Periods

7:17 AM - 9:47 AM
7:35 PM - 10:05 PM

Minor Periods

12:26 AM - 1:56 PM
1:58 AM - 3:28 AM

Action Rating: 3 out of 5

Monday, December 15, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 16°F
Average Humidity: 75%
Chance of Rain: 0%
Wind: 19.9 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 4.48 μg/m3
PM10: 4.75 μg/m3
Carbon Monoxide: 166.52 μg/m3
Nitrogen Dioxide: 3.77 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 75 μg/m3

Astronomical

Sunrise: 7:44 AM
Sun Transit: 11:56 AM
Sunset: 4:10 PM
Daylight: 8 hrs 26 mins
Moonrise: 3:36 AM
Moon Transit: 8:29 AM
Moonset: 1:13 PM
Moon Phase: Waning Crescent
Moon Illumination: 11.7%

Best Times for Fishing or Hunting

Major Periods

7:59 AM - 10:29 AM
8:18 PM - 10:48 PM

Minor Periods

12:43 AM - 2:13 PM
3:06 AM - 4:36 AM

Action Rating: 3 out of 5

Tuesday, December 16, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 26.2°F
Average Humidity: 85%
Chance of Rain: 0%
Wind: 21.9 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 3.32 μg/m3
PM10: 3.42 μg/m3
Carbon Monoxide: 183.85 μg/m3
Nitrogen Dioxide: 2.24 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 75.38 μg/m3

Astronomical

Sunrise: 7:44 AM
Sun Transit: 11:57 AM
Sunset: 4:10 PM
Daylight: 8 hrs 26 mins
Moonrise: 4:45 AM
Moon Transit: 9:13 AM
Moonset: 1:35 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.5%

Best Times for Fishing or Hunting

Major Periods

8:43 AM - 11:13 AM
9:03 PM - 11:33 PM

Minor Periods

1:05 PM - 2:35 PM
4:15 AM - 5:45 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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