Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

52.0°F

Measurement Time: Wednesday, November 4, 2026, 10:18 PM 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

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

50°F
Clear
Conditions: Clear
Humidity: 87%
Feels Like: 44.2°F
Wind: N 17 mph
Wind Gusts: 34.4 mph
Pressure: 29.49 in
Precipitation: 0.04 in
Cloud Cover: 0%
Visibility: 5 mi
UV Index: 0

Weather Forecast

Partly Cloudy
Thu
H: 48°F
L: 34°F
Sunny
Fri
H: 40°F
L: 33°F
Sunny
Sat
H: 43°F
L: 35°F

Air Quality

AQI: 1 - Good
Carbon Monoxide: 123 μg/m3
Nitrogen Dioxide: 0.1 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 76 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 11:44 AM
Sunset: 4:38 PM
Daylight: 9 hrs 45 mins
Moonrise: 2:53 AM
Moon Transit: 8:58 AM
Moonset: 2:50 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.6%

Best Times for Fishing or Hunting

Major Periods

8:28 AM - 10:58 AM
8:47 PM - 11:17 PM

Minor Periods

2:20 PM - 3:50 PM
2:23 AM - 3:53 AM

Action Rating: 2 out of 5

Gale Warning issued November 4 at 1:44PM CST until November 5 at 6:00PM CST by NWS Duluth MN

Effective: Wed November 4, 2026, 1:44 PM
Expires: Thu November 5, 2026, 1:45 AM

* WHAT...For the Small Craft Advisory, northeast winds 15 to 25 kt with gusts up to 30 kt and waves 1 to 4 ft. For the Gale Warning, north winds 15 to 25 kt with gusts up to 40 kt and waves 2 to 5 ft expected. * WHERE...Grand Portage to Grand Marais MN. * WHEN...For the Small Craft Advisory, until 3 AM CST Thursday. For the Gale Warning, from 3 AM to 6 PM CST Thursday. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility.


Small Craft Advisory issued November 4 at 1:44PM CST until November 5 at 3:00AM CST by NWS Duluth MN

Effective: Wed November 4, 2026, 1:44 PM
Expires: Thu November 5, 2026, 1:45 AM

* WHAT...For the Small Craft Advisory, northeast winds 15 to 25 kt with gusts up to 30 kt and waves 1 to 4 ft. For the Gale Warning, north winds 15 to 25 kt with gusts up to 40 kt and waves 2 to 5 ft expected. * WHERE...Grand Portage to Grand Marais MN. * WHEN...For the Small Craft Advisory, until 3 AM CST Thursday. For the Gale Warning, from 3 AM to 6 PM CST Thursday. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility.


Gale Warning issued November 4 at 5:55PM CST until November 5 at 6:00PM CST by NWS Duluth MN

Effective: Wed November 4, 2026, 5:55 PM
Expires: Thu November 5, 2026, 6:00 AM

* WHAT...For the Small Craft Advisory, north winds 15 to 25 kt with gusts up to 35 kt and waves 1 to 4 ft. For the Gale Warning, north winds 20 to 30 kt with gusts up to 40 kt and waves 2 to 5 ft expected. * WHERE...Grand Portage to Grand Marais MN. * WHEN...For the Small Craft Advisory, until 3 AM CST Thursday. For the Gale Warning, from 3 AM to 6 PM CST Thursday. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility.


Small Craft Advisory issued November 4 at 5:55PM CST until November 5 at 3:00AM CST by NWS Duluth MN

Effective: Wed November 4, 2026, 5:55 PM
Expires: Thu November 5, 2026, 6:00 AM

* WHAT...For the Small Craft Advisory, north winds 15 to 25 kt with gusts up to 35 kt and waves 1 to 4 ft. For the Gale Warning, north winds 20 to 30 kt with gusts up to 40 kt and waves 2 to 5 ft expected. * WHERE...Grand Portage to Grand Marais MN. * WHEN...For the Small Craft Advisory, until 3 AM CST Thursday. For the Gale Warning, from 3 AM to 6 PM CST Thursday. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility.
Thursday, November 5, 2026

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 40.5°F
Average Humidity: 72%
Chance of Rain: 68%
Wind: 24.6 mph
UV Index: 1.5

Astronomical

Sunrise: 6:52 AM
Sun Transit: 11:44 AM
Sunset: 4:38 PM
Daylight: 9 hrs 45 mins
Moonrise: 2:53 AM
Moon Transit: 8:58 AM
Moonset: 2:50 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.6%

Best Times for Fishing or Hunting

Major Periods

8:28 AM - 10:58 AM
8:47 PM - 11:17 PM

Minor Periods

2:20 PM - 3:50 PM
2:23 AM - 3:53 AM

Action Rating: 2 out of 5

Friday, November 6, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 35.7°F
Average Humidity: 68%
Chance of Rain: 8%
Wind: 10.5 mph
UV Index: 1.6

Astronomical

Sunrise: 6:54 AM
Sun Transit: 11:45 AM
Sunset: 4:36 PM
Daylight: 9 hrs 42 mins
Moonrise: 4:05 AM
Moon Transit: 9:41 AM
Moonset: 3:06 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:11 AM - 11:41 AM

Minor Periods

2:36 PM - 4:06 PM
3:35 AM - 5:05 AM

Action Rating: 2 out of 5

Saturday, November 7, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 38.6°F
Average Humidity: 70%
Chance of Rain: 9%
Wind: 9.4 mph
UV Index: 1.4

Astronomical

Sunrise: 6:55 AM
Sun Transit: 11:45 AM
Sunset: 4:35 PM
Daylight: 9 hrs 39 mins
Moonrise: 5:18 AM
Moon Transit: 10:26 AM
Moonset: 3:24 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:56 AM - 12:26 AM

Minor Periods

2:54 PM - 4:24 PM
4:48 AM - 6:18 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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