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

28.9°F
Clear
Clear
19.9°F
25.5°F
46%
NE 10.1 mph
17.4 mph
15.2°F
11.6°F
0 in
0%
6 mi
1019 mbar
0

Five Day Weather Forecast

Patchy moderate snow
Sun
H: 31°F
L: 16°F
Overcast
Mon
H: 17°F
L: 7°F
Moderate or heavy snow showers
Tue
H: 19°F
L: 3°F
Light snow showers
Wed
H: 24°F
L: 12°F
Light freezing rain
Thu
H: 34°F
L: 21°F

Air Quality

AQI: 1 - Good
PM2.5: 3.78 μg/m3
PM10: 4.78 μg/m3
Carbon Monoxide: 194.68 μg/m3
Nitrogen Dioxide: 1.68 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 93 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

Wind Advisory issued March 14 at 5:13PM CDT until March 16 at 1:00PM CDT by NWS Duluth MN

Effective: Sat March 14, 2026, 5:13 PM
Expires: Sun March 15, 2026, 7:00 AM

* WHAT...North winds 15 to 30 mph with gusts of 45 to 55 mph expected. * WHERE...Southern Cook and Southern Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...From 7 PM Sunday to 1 PM CDT Monday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...There is a 20 to 40 percent chance for wind gusts up to 60 mph for southern Cook County. If wind forecasts continue to trend stronger, a High Wind Warning may be needed.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
Sunday, March 15, 2026

Weather Forecast

Patchy moderate snow
31.1°F
16.2°F
25.2°F
64%
0.03 in
76%
18%
25.3 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 3.21 μg/m3
PM10: 4.08 μg/m3
Carbon Monoxide: 192.88 μg/m3
Nitrogen Dioxide: 1.55 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 94.24 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

Monday, March 16, 2026

Weather Forecast

Overcast
17.4°F
7.2°F
11.6°F
60%
0 in
0%
0%
29.5 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 2.19 μg/m3
PM10: 2.72 μg/m3
Carbon Monoxide: 183.84 μg/m3
Nitrogen Dioxide: 0.84 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 83.36 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:00 AM
Sunset: 7:08 PM
Daylight: 11 hrs 56 mins
Moonrise: 6:20 AM
Moon Transit: 11:19 AM
Moonset: 4:31 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:49 AM - 1:19 PM

Minor Periods

4:01 PM - 5:31 PM
5:50 AM - 7:20 AM

Action Rating: 3 out of 5

Tuesday, March 17, 2026

Weather Forecast

Moderate or heavy snow showers
19.1°F
2.7°F
11.7°F
71%
0.15 in
60%
8%
13.6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.55 μg/m3
PM10: 1.83 μg/m3
Carbon Monoxide: 169.2 μg/m3
Nitrogen Dioxide: 0.91 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 88.28 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:00 AM
Sunset: 7:10 PM
Daylight: 12 hrs mins
Moonrise: 6:38 AM
Moon Transit: 12:05 AM
Moonset: 5:48 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:35 AM - 2:05 PM

Minor Periods

5:18 PM - 6:48 PM
6:08 AM - 7:38 AM

Action Rating: 5 out of 5

Wednesday, March 18, 2026

Weather Forecast

Light snow showers
24°F
12°F
21.9°F
86%
0.09 in
73%
61%
9.2 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 4.76 μg/m3
PM10: 5.06 μg/m3
Carbon Monoxide: 174 μg/m3
Nitrogen Dioxide: 1.98 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 94.56 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:00 AM
Sunset: 7:11 PM
Daylight: 12 hrs 3 mins
Moonrise: 6:54 AM
Moon Transit: 12:52 AM
Moonset: 7:06 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:22 AM - 2:52 PM

Minor Periods

6:36 PM - 8:06 PM
6:24 AM - 7:54 AM

Action Rating: 3 out of 5

Thursday, March 19, 2026

Weather Forecast

Light freezing rain
33.7°F
20.8°F
30.6°F
98%
0.15 in
71%
42%
13.4 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 8.62 μg/m3
PM10: 8.9 μg/m3
Carbon Monoxide: 192.77 μg/m3
Nitrogen Dioxide: 2.52 μg/m3
Sulphur Dioxide: 0.96 μg/m3
Ozone: 87.62 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:00 AM
Sunset: 7:13 PM
Daylight: 12 hrs 7 mins
Moonrise: 7:10 AM
Moon Transit: 12:31 AM
Moonset: 8:26 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:01 AM - 2:31 AM
12:01 AM - 2:31 AM

Minor Periods

7:56 PM - 9:26 PM
6:40 AM - 8:10 AM

Action Rating: 4 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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