Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

44.2°F

Measurement Time: Monday, June 8, 2026, 2:18 AM CDT

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

64.9°F
Sunny
Sunny
64.9°F
58.1°F
54%
NNW 13.4 mph
16 mph
55.1°F
44.8°F
0 in
0%
6 mi
1013 mbar
3.2

Five Day Weather Forecast

Sunny
Tue
H: 63°F
L: 55°F
Sunny
Wed
H: 66°F
L: 49°F
Sunny
Thu
H: 67°F
L: 53°F
Sunny
Fri
H: 71°F
L: 56°F
Sunny
Sat
H: 69°F
L: 57°F

Air Quality

AQI: 1 - Good
PM2.5: 2 μg/m3
PM10: 2.1 μg/m3
Carbon Monoxide: 102 μg/m3
Nitrogen Dioxide: 0.3 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 1:07 PM
Sunset: 8:50 PM
Daylight: 15 hrs 25 mins
Moonrise: 2:18 PM
Moon Transit: 7:07 PM
Moonset: 12:29 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:12 AM - 8:42 AM
6:37 PM - 9:07 PM

Minor Periods

1:48 PM - 3:18 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Small Craft Advisory issued July 21 at 11:58AM CDT until July 21 at 4:00PM CDT by NWS Duluth MN

Effective: Tue July 21, 2026, 11:58 AM
Expires: Tue July 21, 2026, 4:00 PM

* WHAT...North winds 10 to 15 kt with gusts up to 25 kt and waves 1 to 2 ft. * WHERE...Taconite Harbor to Silver Bay Harbor MN, Silver Bay Harbor to Two Harbors MN, Two Harbors to Duluth MN, Duluth MN to Port Wing WI and Port Wing to Sand Island WI. * WHEN...Until 4 PM CDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.
Tuesday, July 21, 2026

Weather Forecast

Sunny
63°F
54.5°F
59.6°F
68%
0 in
8%
0%
17.7 mph
5.5


Air Quality

AQI: 1 - Good
PM2.5: 2.26 μg/m3
PM10: 2.3 μg/m3
Carbon Monoxide: 117.25 μg/m3
Nitrogen Dioxide: 0.5 μg/m3
Sulphur Dioxide: 0.15 μg/m3
Ozone: 80.38 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 1:07 PM
Sunset: 8:50 PM
Daylight: 15 hrs 25 mins
Moonrise: 2:18 PM
Moon Transit: 7:07 PM
Moonset: 12:29 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:12 AM - 8:42 AM
6:37 PM - 9:07 PM

Minor Periods

1:48 PM - 3:18 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
66.3°F
48.6°F
58.4°F
61%
0 in
5%
0%
11 mph
6.7


Air Quality

AQI: 1 - Good
PM2.5: 2.48 μg/m3
PM10: 2.64 μg/m3
Carbon Monoxide: 98.25 μg/m3
Nitrogen Dioxide: 1.08 μg/m3
Sulphur Dioxide: 0.15 μg/m3
Ozone: 73 μg/m3

Astronomical

Sunrise: 5:26 AM
Sun Transit: 1:07 PM
Sunset: 8:49 PM
Daylight: 15 hrs 23 mins
Moonrise: 3:28 PM
Moon Transit: 7:53 PM
Moonset: 12:48 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

6:57 AM - 9:27 AM
7:23 PM - 9:53 PM

Minor Periods

2:58 PM - 4:28 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
66.5°F
53.4°F
60.4°F
63%
0 in
5%
0%
10.5 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 5.77 μg/m3
PM10: 5.88 μg/m3
Carbon Monoxide: 124.92 μg/m3
Nitrogen Dioxide: 1.13 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 85.88 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 1:07 PM
Sunset: 8:48 PM
Daylight: 15 hrs 21 mins
Moonrise: 4:37 PM
Moon Transit: 8:41 PM
Moonset: 12:11 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

7:44 AM - 10:14 AM
8:11 PM - 10:41 PM

Minor Periods

4:07 PM - 5:37 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
71.1°F
55.8°F
63.2°F
71%
0 in
9%
0%
17.7 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 6.78 μg/m3
PM10: 6.85 μg/m3
Carbon Monoxide: 176.04 μg/m3
Nitrogen Dioxide: 1.57 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 107.92 μg/m3

Astronomical

Sunrise: 5:28 AM
Sun Transit: 1:07 PM
Sunset: 8:47 PM
Daylight: 15 hrs 18 mins
Moonrise: 5:42 PM
Moon Transit: 9:31 PM
Moonset: 12:41 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

8:33 AM - 11:03 AM
9:01 PM - 11:31 PM

Minor Periods

5:12 PM - 6:42 PM
12:11 AM - 1:41 AM

Action Rating: 3 out of 5

Saturday, July 25, 2026

Weather Forecast

Sunny
68.5°F
57.1°F
63.3°F
86%
0.18 in
76%
0%
15.2 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 4.06 μg/m3
PM10: 4.14 μg/m3
Carbon Monoxide: 202.38 μg/m3
Nitrogen Dioxide: 1.76 μg/m3
Sulphur Dioxide: 0.41 μg/m3
Ozone: 103.25 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 1:07 PM
Sunset: 8:45 PM
Daylight: 15 hrs 16 mins
Moonrise: 6:40 PM
Moon Transit: 10:22 PM
Moonset: 1:18 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

9:24 AM - 11:54 AM
12:00 AM - 12:00 AM

Minor Periods

6:10 PM - 7:40 PM
12:48 AM - 2:18 AM

Action Rating: 2 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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