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

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

-15°F
Clear
Clear
-31.4°F
-12.4°F
53%
NW 7.2 mph
15 mph
-35.7°F
-21.6°F
0 in
0%
0 mi
1038 mbar
0

Five Day Weather Forecast

Light freezing rain
Sat
H: 6°F
L: -13°F
Sunny
Sun
H: 8°F
L: -5°F
Partly Cloudy
Mon
H: 11°F
L: -9°F
Partly Cloudy
Tue
H: 10°F
L: 3°F
Overcast
Wed
H: 7°F
L: -5°F

Air Quality

AQI: 1 - Good
PM2.5: 1.68 μg/m3
PM10: 1.78 μg/m3
Carbon Monoxide: 155.68 μg/m3
Nitrogen Dioxide: 1.38 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 70 μg/m3

Astronomical

Sunrise: 7:37 AM
Sun Transit: 12:13 AM
Sunset: 4:50 PM
Daylight: 9 hrs 13 mins
Moonrise: 9:58 AM
Moon Transit: 4:48 PM
Moonset: 11:57 PM
Moon Phase: First Quarter
Moon Illumination: 34.7%

Best Times for Fishing or Hunting

Major Periods

3:52 AM - 6:22 AM
4:18 PM - 6:48 PM

Minor Periods

12:00 AM - 12:00 AM
9:28 AM - 10:58 AM

Action Rating: 2 out of 5

Cold Weather Advisory issued January 23 at 2:40PM CST until January 25 at 12:00PM CST by NWS Duluth MN

Effective: Fri January 23, 2026, 2:40 PM
Expires: Sat January 24, 2026, 6:00 AM

* WHAT...For the Extreme Cold Warning, dangerously cold wind chills as low as 45 degrees below zero. For the Cold Weather Advisory, very cold wind chills as low as 41 degrees below zero expected. * WHERE...Crow Wing, Aitkin, Pine, Koochiching, Cass, Itasca, Carlton, St. Louis, Cook and Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation, the Fond du Lac Band, the Mille Lacs Band, Big Sandy Lake, East Lake, Hinckley and, Lena Lake areas and the Bois Forte Band, Nett Lake, Lake Vermilion and, Deer Creek areas. Other locations including Voyageurs National Park. The entire Boundary Waters is also included. * WHEN...For the Extreme Cold Warning, until noon CST Saturday. For the Cold Weather Advisory, from 6 PM Saturday to noon CST Sunday. * IMPACTS...The dangerously cold wind chills as low as 45 degrees below zero could cause frostbite on exposed skin in as little as 10 minutes. Very cold temperatures can lead to hypothermia with prolonged exposure.

Dress in layers including a hat, face mask, and gloves if you must go outside. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Extreme Cold Warning issued January 23 at 2:40PM CST until January 24 at 12:00PM CST by NWS Duluth MN

Effective: Fri January 23, 2026, 2:40 PM
Expires: Sat January 24, 2026, 6:00 AM

* WHAT...For the Extreme Cold Warning, dangerously cold wind chills as low as 45 degrees below zero. For the Cold Weather Advisory, very cold wind chills as low as 41 degrees below zero expected. * WHERE...Crow Wing, Aitkin, Pine, Koochiching, Cass, Itasca, Carlton, St. Louis, Cook and Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation, the Fond du Lac Band, the Mille Lacs Band, Big Sandy Lake, East Lake, Hinckley and, Lena Lake areas and the Bois Forte Band, Nett Lake, Lake Vermilion and, Deer Creek areas. Other locations including Voyageurs National Park. The entire Boundary Waters is also included. * WHEN...For the Extreme Cold Warning, until noon CST Saturday. For the Cold Weather Advisory, from 6 PM Saturday to noon CST Sunday. * IMPACTS...The dangerously cold wind chills as low as 45 degrees below zero could cause frostbite on exposed skin in as little as 10 minutes. Very cold temperatures can lead to hypothermia with prolonged exposure.

Dress in layers including a hat, face mask, and gloves if you must go outside. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Cold Weather Advisory issued January 24 at 1:40AM CST until January 25 at 12:00PM CST by NWS Duluth MN

Effective: Sat January 24, 2026, 1:40 AM
Expires: Sat January 24, 2026, 3:00 PM

* WHAT...For the Extreme Cold Warning, dangerously cold wind chills as low as 45 degrees below zero. For the Cold Weather Advisory, very cold wind chills as low as 35 degrees below zero expected. * WHERE...All of northeast Minnesota and northwest Wisconsin. * WHEN...For the Extreme Cold Warning, until noon CST today. For the Cold Weather Advisory, from 6 PM this evening to noon CST Sunday. * IMPACTS...The dangerously cold wind chills as low as 45 degrees below zero could cause frostbite on exposed skin in as little as 10 minutes. Very cold temperatures can lead to hypothermia with prolonged exposure.

Dress in layers including a hat, face mask, and gloves if you must go outside. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Extreme Cold Warning issued January 24 at 1:40AM CST until January 24 at 12:00PM CST by NWS Duluth MN

Effective: Sat January 24, 2026, 1:40 AM
Expires: Sat January 24, 2026, 3:00 PM

* WHAT...For the Extreme Cold Warning, dangerously cold wind chills as low as 45 degrees below zero. For the Cold Weather Advisory, very cold wind chills as low as 35 degrees below zero expected. * WHERE...All of northeast Minnesota and northwest Wisconsin. * WHEN...For the Extreme Cold Warning, until noon CST today. For the Cold Weather Advisory, from 6 PM this evening to noon CST Sunday. * IMPACTS...The dangerously cold wind chills as low as 45 degrees below zero could cause frostbite on exposed skin in as little as 10 minutes. Very cold temperatures can lead to hypothermia with prolonged exposure.

Dress in layers including a hat, face mask, and gloves if you must go outside. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Saturday, January 24, 2026

Weather Forecast

Light freezing rain
5.9°F
-13.2°F
-4.3°F
70%
0.01 in
61%
6%
8.3 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 1.65 μg/m3
PM10: 1.74 μg/m3
Carbon Monoxide: 157.12 μg/m3
Nitrogen Dioxide: 1.63 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 67.52 μg/m3

Astronomical

Sunrise: 7:37 AM
Sun Transit: 12:13 AM
Sunset: 4:50 PM
Daylight: 9 hrs 13 mins
Moonrise: 9:58 AM
Moon Transit: 4:48 PM
Moonset: 11:57 PM
Moon Phase: First Quarter
Moon Illumination: 34.7%

Best Times for Fishing or Hunting

Major Periods

3:52 AM - 6:22 AM
4:18 PM - 6:48 PM

Minor Periods

12:00 AM - 12:00 AM
9:28 AM - 10:58 AM

Action Rating: 2 out of 5

Sunday, January 25, 2026

Weather Forecast

Sunny
7.7°F
-5.3°F
0.5°F
69%
0 in
0%
0%
10.3 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 3.57 μg/m3
PM10: 3.77 μg/m3
Carbon Monoxide: 165.12 μg/m3
Nitrogen Dioxide: 2.83 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 64.56 μg/m3

Astronomical

Sunrise: 7:36 AM
Sun Transit: 12:13 AM
Sunset: 4:52 PM
Daylight: 9 hrs 15 mins
Moonrise: 10:17 AM
Moon Transit: 5:38 PM
Moonset: 12:57 AM
Moon Phase: First Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

4:40 AM - 7:10 AM
5:08 PM - 7:38 PM

Minor Periods

9:47 AM - 11:17 AM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Monday, January 26, 2026

Weather Forecast

Partly Cloudy
11.1°F
-8.5°F
0.7°F
65%
0 in
0%
0%
20.1 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.49 μg/m3
PM10: 3.66 μg/m3
Carbon Monoxide: 162.92 μg/m3
Nitrogen Dioxide: 2.58 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 69.12 μg/m3

Astronomical

Sunrise: 7:35 AM
Sun Transit: 12:13 AM
Sunset: 4:53 PM
Daylight: 9 hrs 18 mins
Moonrise: 10:40 AM
Moon Transit: 6:31 PM
Moonset: 1:18 AM
Moon Phase: First Quarter
Moon Illumination: 57.1%

Best Times for Fishing or Hunting

Major Periods

5:31 AM - 8:01 AM
6:01 PM - 8:31 PM

Minor Periods

10:10 AM - 11:40 AM
12:48 AM - 2:18 AM

Action Rating: 3 out of 5

Tuesday, January 27, 2026

Weather Forecast

Partly Cloudy
10.4°F
3.4°F
7.4°F
79%
0 in
0%
15%
16.3 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 4.01 μg/m3
PM10: 4.09 μg/m3
Carbon Monoxide: 160.6 μg/m3
Nitrogen Dioxide: 2.88 μg/m3
Sulphur Dioxide: 1.16 μg/m3
Ozone: 70.24 μg/m3

Astronomical

Sunrise: 7:34 AM
Sun Transit: 12:14 AM
Sunset: 4:55 PM
Daylight: 9 hrs 21 mins
Moonrise: 11:10 AM
Moon Transit: 7:30 PM
Moonset: 2:43 AM
Moon Phase: First Quarter
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

6:27 AM - 8:57 AM
7:00 PM - 9:30 PM

Minor Periods

10:40 AM - 12:10 AM
2:13 AM - 3:43 AM

Action Rating: 2 out of 5

Wednesday, January 28, 2026

Weather Forecast

Overcast
6.5°F
-4.9°F
1.3°F
84%
0 in
0%
5%
9.6 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 1.12 μg/m3
PM10: 1.19 μg/m3
Carbon Monoxide: 154.89 μg/m3
Nitrogen Dioxide: 1.03 μg/m3
Sulphur Dioxide: 0.79 μg/m3
Ozone: 71 μg/m3

Astronomical

Sunrise: 7:33 AM
Sun Transit: 12:14 AM
Sunset: 4:56 PM
Daylight: 9 hrs 23 mins
Moonrise: 11:52 AM
Moon Transit: 8:32 PM
Moonset: 4:05 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

7:28 AM - 9:58 AM
8:02 PM - 10:32 PM

Minor Periods

11:22 AM - 12:52 AM
3:35 AM - 5:05 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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