Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

48.0°F

Measurement Time: Friday, July 24, 2026, 2:18 PM 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

55°F
Partly Cloudy
Partly Cloudy
51.6°F
58.3°F
89%
SW 12.8 mph
26.8 mph
57.4°F
54.8°F
0 in
0%
6 mi
1011 mbar
1

Five Day Weather Forecast

Partly Cloudy
Fri
H: 63°F
L: 55°F
Sunny
Sat
H: 70°F
L: 59°F
Sunny
Sun
H: 69°F
L: 57°F
Patchy rain nearby
Mon
H: 67°F
L: 54°F
Sunny
Tue
H: 68°F
L: 56°F

Air Quality

AQI: 1 - Good
PM2.5: 5.7 μg/m3
PM10: 6 μg/m3
Carbon Monoxide: 148 μg/m3
Nitrogen Dioxide: 1.5 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 117 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

Small Craft Advisory issued July 24 at 10:55AM CDT until July 25 at 10:00AM CDT by NWS Duluth MN

Effective: Fri July 24, 2026, 10:55 AM
Expires: Sat July 25, 2026, 6:00 AM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt and waves 1 to 4 ft expected. * WHERE...Grand Portage to Grand Marais MN. * WHEN...From 3 PM this afternoon to 10 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 24 at 10:55AM CDT until July 25 at 4:00AM CDT by NWS Duluth MN

Effective: Fri July 24, 2026, 10:55 AM
Expires: Sat July 25, 2026, 4:00 AM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt and waves 1 to 3 ft expected. * WHERE...Grand Marais to Taconite Harbor MN and Taconite Harbor to Silver Bay Harbor MN. * WHEN...From 3 PM this afternoon to 4 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.
Friday, July 24, 2026

Weather Forecast

Partly Cloudy
63.1°F
55°F
58.6°F
80%
0 in
12%
0%
13.2 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 5.95 μg/m3
PM10: 6.14 μg/m3
Carbon Monoxide: 148.29 μg/m3
Nitrogen Dioxide: 1.5 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 93.58 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
70.3°F
58.5°F
64.4°F
82%
0.25 in
77%
0%
13.9 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 6.35 μg/m3
PM10: 6.5 μg/m3
Carbon Monoxide: 127.08 μg/m3
Nitrogen Dioxide: 1.79 μg/m3
Sulphur Dioxide: 0.33 μg/m3
Ozone: 91 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

Sunday, July 26, 2026

Weather Forecast

Sunny
69.2°F
56.6°F
61.9°F
77%
0 in
20%
0%
13.6 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 6.2 μg/m3
PM10: 6.36 μg/m3
Carbon Monoxide: 126.75 μg/m3
Nitrogen Dioxide: 0.76 μg/m3
Sulphur Dioxide: 0.29 μg/m3
Ozone: 74 μg/m3

Astronomical

Sunrise: 5:31 AM
Sun Transit: 1:07 PM
Sunset: 8:44 PM
Daylight: 15 hrs 13 mins
Moonrise: 7:28 PM
Moon Transit: 11:14 PM
Moonset: 2:06 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

10:15 AM - 12:45 AM
12:00 AM - 12:00 AM

Minor Periods

6:58 PM - 8:28 PM
1:36 AM - 3:06 AM

Action Rating: 3 out of 5

Monday, July 27, 2026

Weather Forecast

Patchy rain nearby
67°F
53.9°F
61.6°F
86%
0.15 in
76%
0%
6.9 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 2.55 μg/m3
PM10: 2.61 μg/m3
Carbon Monoxide: 136.04 μg/m3
Nitrogen Dioxide: 1.33 μg/m3
Sulphur Dioxide: 0.44 μg/m3
Ozone: 73.83 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 1:07 PM
Sunset: 8:43 PM
Daylight: 15 hrs 11 mins
Moonrise: 8:06 PM
Moon Transit: 12:00 AM
Moonset: 3:03 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:06 AM - 1:36 PM

Minor Periods

7:36 PM - 9:06 PM
2:33 AM - 4:03 AM

Action Rating: 3 out of 5

Tuesday, July 28, 2026

Weather Forecast

Sunny
67.6°F
56.3°F
61°F
85%
0 in
20%
0%
6.5 mph
6.1


Air Quality

AQI: 1 - Good
PM2.5: 5.74 μg/m3
PM10: 6.03 μg/m3
Carbon Monoxide: 198.38 μg/m3
Nitrogen Dioxide: 1.49 μg/m3
Sulphur Dioxide: 0.31 μg/m3
Ozone: 63.25 μg/m3

Astronomical

Sunrise: 5:33 AM
Sun Transit: 1:07 PM
Sunset: 8:42 PM
Daylight: 15 hrs 8 mins
Moonrise: 8:36 PM
Moon Transit: 12:04 AM
Moonset: 4:09 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:56 AM - 2:26 PM

Minor Periods

8:06 PM - 9:36 PM
3:39 AM - 5:09 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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