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

30.9°F
Clear
Clear
22°F
25.7°F
31%
NW 10.7 mph
16.5 mph
16.5°F
11.7°F
0 in
0%
6 mi
1018 mbar
0

Five Day Weather Forecast

Partly Cloudy
Wed
H: 36°F
L: 23°F
Moderate or heavy snow showers
Thu
H: 26°F
L: 14°F
Moderate or heavy snow showers
Fri
H: 28°F
L: 21°F
Partly Cloudy
Sat
H: 27°F
L: 13°F
Overcast
Sun
H: 22°F
L: 10°F

Air Quality

AQI: 1 - Good
PM2.5: 2.28 μg/m3
PM10: 2.88 μg/m3
Carbon Monoxide: 162.68 μg/m3
Nitrogen Dioxide: 0.98 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 88 μg/m3

Astronomical

Sunrise: 7:22 AM
Sun Transit: 12:00 AM
Sunset: 7:01 PM
Daylight: 11 hrs 39 mins
Moonrise: 3:27 AM
Moon Transit: 7:08 AM
Moonset: 10:49 AM
Moon Phase: Last Quarter
Moon Illumination: 36.0%

Best Times for Fishing or Hunting

Major Periods

6:38 AM - 9:08 AM
7:01 PM - 9:31 PM

Minor Periods

10:19 AM - 11:49 AM
2:57 AM - 4:27 AM

Action Rating: 3 out of 5

Blizzard Warning issued March 11 at 12:54PM CDT until March 13 at 1:00PM CDT by NWS Duluth MN

Effective: Wed March 11, 2026, 12:54 PM
Expires: Thu March 12, 2026, 6:00 AM

* WHAT...Blizzard conditions expected. Total snow accumulations between 6 and 13 inches. Winds gusting as high as 45 mph. * WHERE...Southern Cook and Southern Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...From 1 PM Thursday to 1 PM CDT Friday. * IMPACTS...Visibilities will drop below 1/4 mile due to falling and blowing snow. The strong winds and weight of snow on tree limbs may down power lines and could cause sporadic power outages. Whiteout conditions are expected and will make travel treacherous and potentially life-threatening. The hazardous conditions will impact the Thursday evening and Friday morning commutes. * ADDITIONAL DETAILS...Snowfall rates will be intense, possibly exceeding 2" per hour Thursday evening.

Travel should be restricted to emergencies only. If you must travel, have a winter survival kit with you. If you get stranded, stay with your vehicle. Call 511 or visit www.511mn.org for Minnesota road information.


Winter Storm Warning issued March 11 at 12:54PM CDT until March 13 at 1:00PM CDT by NWS Duluth MN

Effective: Wed March 11, 2026, 12:54 PM
Expires: Thu March 12, 2026, 6:00 AM

* WHAT...Heavy snow expected. Total snow accumulations between 4 and 8 inches except between 6 and 12 inches for northern Iron County and the higher terrain of the North Shore. Winds gusting as high as 35 mph. * WHERE...In Minnesota, Koochiching, North Itasca, Carlton, St. Louis, and Northern Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, Douglas, and Iron Counties. This includes the Tribal Lands of the Fond du Lac Band, the northwestern area of the Lac du Flambeau Band, the Red Cliff Band, the Bad River Reservation and the Bois Forte Band, Nett Lake, Deer Creek and, Lake Vermilion areas. Other locations including the Apostle Islands National Lakeshore, Madeline Island and Voyageurs National Park. The entire Boundary Waters is also included. * WHEN...From 1 PM Thursday to 1 PM CDT Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday evening and Friday morning commutes. * ADDITIONAL DETAILS...Snowfall rates will be intense, possibly exceeding 1" per hour Thursday afternoon and evening.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. In Minnesota, call 511 or visit www.511mn.org for Minnesota road information. In Wisconsin, call 511 or visit www.511wi.gov for Wisconsin road information.


Wednesday, March 11, 2026

Weather Forecast

Partly Cloudy
36.1°F
22.8°F
28.7°F
63%
0 in
0%
7%
13.9 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 2.13 μg/m3
PM10: 2.74 μg/m3
Carbon Monoxide: 171.92 μg/m3
Nitrogen Dioxide: 1.05 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 88.64 μg/m3

Astronomical

Sunrise: 7:22 AM
Sun Transit: 12:00 AM
Sunset: 7:01 PM
Daylight: 11 hrs 39 mins
Moonrise: 3:27 AM
Moon Transit: 7:08 AM
Moonset: 10:49 AM
Moon Phase: Last Quarter
Moon Illumination: 36.0%

Best Times for Fishing or Hunting

Major Periods

6:38 AM - 9:08 AM
7:01 PM - 9:31 PM

Minor Periods

10:19 AM - 11:49 AM
2:57 AM - 4:27 AM

Action Rating: 3 out of 5

Thursday, March 12, 2026

Weather Forecast

Moderate or heavy snow showers
25.9°F
14°F
21.8°F
75%
0.96 in
62%
13%
23.3 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 2.3 μg/m3
PM10: 2.99 μg/m3
Carbon Monoxide: 163.56 μg/m3
Nitrogen Dioxide: 1.01 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 87.32 μg/m3

Astronomical

Sunrise: 7:20 AM
Sun Transit: 12:00 AM
Sunset: 7:03 PM
Daylight: 11 hrs 43 mins
Moonrise: 4:19 AM
Moon Transit: 8:00 AM
Moonset: 11:44 AM
Moon Phase: Last Quarter
Moon Illumination: 25.6%

Best Times for Fishing or Hunting

Major Periods

7:30 AM - 10:00 AM
7:53 PM - 10:23 PM

Minor Periods

11:14 AM - 12:44 AM
3:49 AM - 5:19 AM

Action Rating: 3 out of 5

Friday, March 13, 2026

Weather Forecast

Moderate or heavy snow showers
27.9°F
21.2°F
25.8°F
79%
1.13 in
65%
28%
26.6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.74 μg/m3
PM10: 2.17 μg/m3
Carbon Monoxide: 160.04 μg/m3
Nitrogen Dioxide: 1.06 μg/m3
Sulphur Dioxide: 0.91 μg/m3
Ozone: 92.2 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 12:00 AM
Sunset: 7:04 PM
Daylight: 11 hrs 46 mins
Moonrise: 5:01 AM
Moon Transit: 8:52 AM
Moonset: 12:49 AM
Moon Phase: Waning Crescent
Moon Illumination: 16.4%

Best Times for Fishing or Hunting

Major Periods

8:22 AM - 10:52 AM
8:45 PM - 11:15 PM

Minor Periods

12:19 AM - 1:49 PM
4:31 AM - 6:01 AM

Action Rating: 2 out of 5

Saturday, March 14, 2026

Weather Forecast

Partly Cloudy
27.1°F
12.9°F
19.4°F
72%
0 in
0%
0%
7.8 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 2.17 μg/m3
PM10: 2.79 μg/m3
Carbon Monoxide: 159.57 μg/m3
Nitrogen Dioxide: 1.24 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 90.16 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 12:00 AM
Sunset: 7:06 PM
Daylight: 11 hrs 50 mins
Moonrise: 5:33 AM
Moon Transit: 9:43 AM
Moonset: 2:00 PM
Moon Phase: Waning Crescent
Moon Illumination: 8.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:13 AM - 11:43 AM

Minor Periods

1:30 PM - 3:00 PM
5:03 AM - 6:33 AM

Action Rating: 2 out of 5

Sunday, March 15, 2026

Weather Forecast

Overcast
21.9°F
10.2°F
17.2°F
84%
0 in
0%
4%
17.9 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.74 μg/m3
PM10: 3.55 μg/m3
Carbon Monoxide: 170.15 μg/m3
Nitrogen Dioxide: 1.46 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 93.46 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:00 AM
Sunset: 7:07 PM
Daylight: 11 hrs 53 mins
Moonrise: 5:59 AM
Moon Transit: 10:32 AM
Moonset: 3:15 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:02 AM - 12:32 AM

Minor Periods

2:45 PM - 4:15 PM
5:29 AM - 6:59 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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