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°F
Light snow
Light snow
22.9°F
29.8°F
88%
SSE 4.5 mph
5.2 mph
22.8°F
27.6°F
0.01 in
0%
3 mi
1018 mbar
1.4

Five Day Weather Forecast

Light freezing rain
Tue
H: 33°F
L: 26°F
Light freezing rain
Wed
H: 28°F
L: 18°F
Blizzard
Thu
H: 28°F
L: 23°F
Moderate or heavy snow showers
Fri
H: 32°F
L: 21°F
Blizzard
Sat
H: 30°F
L: 25°F

Air Quality

AQI: 1 - Good
PM2.5: 1.28 μg/m3
PM10: 1.48 μg/m3
Carbon Monoxide: 170.68 μg/m3
Nitrogen Dioxide: 1.58 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 85 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 1:05 PM
Sunset: 7:30 PM
Daylight: 12 hrs 48 mins
Moonrise: 6:19 PM
Moon Transit: 12:00 AM
Moonset: 6:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:30 AM - 2:00 PM

Minor Periods

5:49 PM - 7:19 PM
5:32 AM - 7:02 AM

Action Rating: 4 out of 5

Winter Weather Advisory issued March 31 at 5:07AM CDT until March 31 at 7:00PM CDT by NWS Duluth MN

Effective: Tue March 31, 2026, 5:07 AM
Expires: Tue March 31, 2026, 7:00 PM

* WHAT...Snow. Additional snow accumulations up to two inches. * WHERE...North Lake and Cook Counties. This includes the Tribal Lands of the Grand Portage Reservation. This also includes the Boundary Waters eastern and central area. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Tuesday morning and evening commutes.

Slow down and use caution while traveling. Call 511 or visit www.511mn.org for Minnesota road information.
Tuesday, March 31, 2026

Weather Forecast

Light freezing rain
32.9°F
25.7°F
30.9°F
82%
0.13 in
64%
42%
16.3 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 2.64 μg/m3
PM10: 3.46 μg/m3
Carbon Monoxide: 177.96 μg/m3
Nitrogen Dioxide: 1.21 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 96.68 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 1:05 PM
Sunset: 7:30 PM
Daylight: 12 hrs 48 mins
Moonrise: 6:19 PM
Moon Transit: 12:00 AM
Moonset: 6:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:30 AM - 2:00 PM

Minor Periods

5:49 PM - 7:19 PM
5:32 AM - 7:02 AM

Action Rating: 4 out of 5

Wednesday, April 1, 2026

Weather Forecast

Light freezing rain
27.5°F
17.6°F
24.5°F
79%
0 in
80%
3%
15.4 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 1.28 μg/m3
PM10: 1.65 μg/m3
Carbon Monoxide: 155.88 μg/m3
Nitrogen Dioxide: 1.1 μg/m3
Sulphur Dioxide: 1.06 μg/m3
Ozone: 90.72 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 1:05 PM
Sunset: 7:31 PM
Daylight: 12 hrs 51 mins
Moonrise: 7:30 PM
Moon Transit: 12:24 AM
Moonset: 6:17 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:13 AM - 2:43 PM

Minor Periods

7:00 PM - 8:30 PM
5:47 AM - 7:17 AM

Action Rating: 3 out of 5

Thursday, April 2, 2026

Weather Forecast

Blizzard
27.9°F
23°F
26.3°F
90%
2.91 in
63%
59%
25.9 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 1.43 μg/m3
PM10: 1.87 μg/m3
Carbon Monoxide: 148.76 μg/m3
Nitrogen Dioxide: 0.94 μg/m3
Sulphur Dioxide: 0.89 μg/m3
Ozone: 98.88 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 1:04 PM
Sunset: 7:33 PM
Daylight: 12 hrs 55 mins
Moonrise: 8:41 PM
Moon Transit: 1:07 AM
Moonset: 6:32 AM
Moon Phase: Full
Moon Illumination: 99.5%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 AM
12:55 AM - 3:25 PM

Minor Periods

8:11 PM - 9:41 PM
6:02 AM - 7:32 AM

Action Rating: 3 out of 5

Friday, April 3, 2026

Weather Forecast

Moderate or heavy snow showers
31.5°F
21.4°F
27.2°F
81%
0.72 in
80%
35%
21.3 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 1.5 μg/m3
PM10: 1.86 μg/m3
Carbon Monoxide: 142.26 μg/m3
Nitrogen Dioxide: 0.99 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 103.48 μg/m3

Astronomical

Sunrise: 6:36 AM
Sun Transit: 1:04 PM
Sunset: 7:34 PM
Daylight: 12 hrs 58 mins
Moonrise: 9:52 PM
Moon Transit: 1:50 AM
Moonset: 6:49 AM
Moon Phase: Full
Moon Illumination: 96.6%

Best Times for Fishing or Hunting

Major Periods

1:20 AM - 3:50 AM
1:39 PM - 4:09 PM

Minor Periods

9:22 PM - 10:52 PM
6:19 AM - 7:49 AM

Action Rating: 4 out of 5

Saturday, April 4, 2026

Weather Forecast

Blizzard
29.5°F
24.6°F
27°F
92%
1.16 in
75%
65%
24.6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.85 μg/m3
PM10: 2.44 μg/m3
Carbon Monoxide: 145.33 μg/m3
Nitrogen Dioxide: 0.89 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 99.62 μg/m3

Astronomical

Sunrise: 6:34 AM
Sun Transit: 1:04 PM
Sunset: 7:36 PM
Daylight: 13 hrs 2 mins
Moonrise: 11:03 PM
Moon Transit: 2:34 AM
Moonset: 7:08 AM
Moon Phase: Full
Moon Illumination: 91.3%

Best Times for Fishing or Hunting

Major Periods

2:04 AM - 4:34 AM
2:24 PM - 4:54 PM

Minor Periods

12:00 AM - 12:00 AM
6:38 AM - 8:08 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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