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

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

22.3°F
Light snow
Conditions: Light snow
Humidity: 67%
Heat Index: 22.3°F
Feels Like: 6°F
Wind: N 15.5 mph
Wind Gusts: 36 mph
Wind Chill: 6°F
Air Pressure: 1008.8 millibars
Dew Point: 6°F
Chance of Precipitation: 35%
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 4 mi
UV Index: 0

Five Day Weather Forecast

Patchy moderate snow
Sun
H: 36°F
L: 16°F
Sunny
Mon
H: 14°F
L: 5°F
Moderate snow
Tue
H: 26°F
L: 7°F
Cloudy
Wed
H: 5°F
L: -5°F
Partly Cloudy
Thu
H: 2°F
L: -7°F

Air Quality

AQI: 1 - Good
PM2.5: 0.78 μg/m3
PM10: 0.78 μg/m3
Carbon Monoxide: 153.68 μg/m3
Nitrogen Dioxide: 0.88 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 75 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:03 AM
Sunset: 4:17 PM
Daylight: 8 hrs 27 mins
Moonrise: 11:52 AM
Moon Transit: 6:52 PM
Moonset: 12:50 AM
Moon Phase: First Quarter
Moon Illumination: 63.0%

Best Times for Fishing or Hunting

Major Periods

5:54 AM - 8:24 AM
6:22 PM - 8:52 PM

Minor Periods

11:22 AM - 12:52 AM
12:20 AM - 1:50 AM

Action Rating: 2 out of 5

High Wind Warning issued December 28 at 5:52AM CST until December 29 at 3:00PM CST by NWS Duluth MN

Effective: Sun December 28, 2025, 5:52 AM
Expires: Sun December 28, 2025, 6:00 PM

* WHAT...North winds 15 to 25 mph with gusts up to 60 mph expected. * WHERE...Southern Cook County. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...From 9 PM this evening to 3 PM CST Monday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.

Watch for falling debris and tree limbs. Use caution if you must drive.


Winter Weather Advisory issued December 28 at 2:51AM CST until December 29 at 3:00AM CST by NWS Duluth MN

Effective: Sun December 28, 2025, 2:51 AM
Expires: Sun December 28, 2025, 3:00 PM

* WHAT...Snow expected. Total snow accumulations up to two inches. Winds gusting as high as 55 mph. * WHERE...Southern Cook and Southern Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...From 3 PM this afternoon to 3 AM CST Monday. * IMPACTS...Plan on slippery road conditions. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Strong winds could lead to a period of localized whiteout conditions for several hours this evening.

Slow down and use caution while traveling. Call 511 or visit www.511mn.org for Minnesota road information.


Winter Weather Advisory issued December 28 at 11:07AM CST until December 29 at 3:00AM CST by NWS Duluth MN

Effective: Sun December 28, 2025, 11:07 AM
Expires: Sun December 28, 2025, 11:15 PM

* WHAT...Snow expected. Total snow accumulations up to two inches. Winds gusting as high as 55 mph. * WHERE...Southern Cook and Southern Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...From 3 PM this afternoon to 3 AM CST Monday. * IMPACTS...Plan on slippery road conditions. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Strong winds could lead to a period of localized whiteout conditions for several hours this evening.

Slow down and use caution while traveling. Call 511 or visit www.511mn.org for Minnesota road information.


High Wind Warning issued December 28 at 1:17PM CST until December 29 at 3:00PM CST by NWS Duluth MN

Effective: Sun December 28, 2025, 1:17 PM
Expires: Mon December 29, 2025, 6:00 AM

* WHAT...North winds 15 to 25 mph with gusts up to 60 mph expected. * WHERE...Southern Cook County. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...From 9 PM this evening to 3 PM CST Monday. * IMPACTS...Damaging winds will blow down trees and power lines. Power outages are expected. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Expect areas of rapid visibility reductions from blowing snow Sunday overnight.

Watch for falling debris and tree limbs. Use caution if you must drive.
Sunday, December 28, 2025

Weather Forecast

Conditions: Patchy moderate snow
Average Temperature: 31.5°F
Average Humidity: 80%
Chance of Rain: 71%
Wind: 26.4 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 3.65 μg/m3
PM10: 3.75 μg/m3
Carbon Monoxide: 195.68 μg/m3
Nitrogen Dioxide: 4.15 μg/m3
Sulphur Dioxide: 1.03 μg/m3
Ozone: 40.16 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:03 AM
Sunset: 4:17 PM
Daylight: 8 hrs 27 mins
Moonrise: 11:52 AM
Moon Transit: 6:52 PM
Moonset: 12:50 AM
Moon Phase: First Quarter
Moon Illumination: 63.0%

Best Times for Fishing or Hunting

Major Periods

5:54 AM - 8:24 AM
6:22 PM - 8:52 PM

Minor Periods

11:22 AM - 12:52 AM
12:20 AM - 1:50 AM

Action Rating: 2 out of 5

Monday, December 29, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 10.5°F
Average Humidity: 66%
Chance of Rain: 0%
Wind: 29.5 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 0.87 μg/m3
PM10: 0.94 μg/m3
Carbon Monoxide: 150.04 μg/m3
Nitrogen Dioxide: 0.97 μg/m3
Sulphur Dioxide: 0.85 μg/m3
Ozone: 73.76 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:03 AM
Sunset: 4:18 PM
Daylight: 8 hrs 28 mins
Moonrise: 12:12 AM
Moon Transit: 7:44 PM
Moonset: 2:10 AM
Moon Phase: First Quarter
Moon Illumination: 73.5%

Best Times for Fishing or Hunting

Major Periods

6:44 AM - 9:14 AM
7:14 PM - 9:44 PM

Minor Periods

11:42 AM - 1:12 PM
1:40 AM - 3:10 AM

Action Rating: 2 out of 5

Tuesday, December 30, 2025

Weather Forecast

Conditions: Moderate snow
Average Temperature: 15.7°F
Average Humidity: 75%
Chance of Rain: 65%
Wind: 14.8 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 1.58 μg/m3
PM10: 1.71 μg/m3
Carbon Monoxide: 141.96 μg/m3
Nitrogen Dioxide: 1.64 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 75.72 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:04 AM
Sunset: 4:18 PM
Daylight: 8 hrs 28 mins
Moonrise: 12:39 AM
Moon Transit: 8:41 PM
Moonset: 3:35 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%

Best Times for Fishing or Hunting

Major Periods

7:39 AM - 10:09 AM
8:11 PM - 10:41 PM

Minor Periods

12:09 AM - 1:39 PM
3:05 AM - 4:35 AM

Action Rating: 3 out of 5

Wednesday, December 31, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 3.3°F
Average Humidity: 65%
Chance of Rain: 0%
Wind: 21.5 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 1.33 μg/m3
PM10: 1.47 μg/m3
Carbon Monoxide: 141.35 μg/m3
Nitrogen Dioxide: 1.28 μg/m3
Sulphur Dioxide: 1.01 μg/m3
Ozone: 75.64 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:04 AM
Sunset: 4:19 PM
Daylight: 8 hrs 29 mins
Moonrise: 1:14 PM
Moon Transit: 9:44 PM
Moonset: 5:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.5%

Best Times for Fishing or Hunting

Major Periods

8:39 AM - 11:09 AM
9:14 PM - 11:44 PM

Minor Periods

12:44 AM - 2:14 PM
4:32 AM - 6:02 AM

Action Rating: 2 out of 5

Thursday, January 1, 2026

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: -2.7°F
Average Humidity: 80%
Chance of Rain: 0%
Wind: 22.6 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 0.95 μg/m3
PM10: 1.06 μg/m3
Carbon Monoxide: 144.97 μg/m3
Nitrogen Dioxide: 0.96 μg/m3
Sulphur Dioxide: 0.97 μg/m3
Ozone: 76.92 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:05 AM
Sunset: 4:20 PM
Daylight: 8 hrs 30 mins
Moonrise: 2:05 PM
Moon Transit: 10:50 PM
Moonset: 6:26 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.0%

Best Times for Fishing or Hunting

Major Periods

9:44 AM - 12:14 AM
12:00 AM - 12:00 AM

Minor Periods

1:35 PM - 3:05 PM
5:56 AM - 7:26 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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