Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

40.0°F

Measurement Time: Monday, June 8, 2026, 5:00 AM CDT

Temperature Locations

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Lake Superior

Station Name: Grand Marais
Data Source: USGS

Elevation Above Sea Level: 607 feet

Nearest Address:
2nd Street
Grand Marais, MN 55604
Cook County

GPS Coordinates: 47.7517, -90.3283

Nearby Water Temperatures

Grand Marais Harbor, Grand Marais, MN (0.6 mi)
Poplar River, Lutsen, MN (19.4 mi)
Grand Portage River, Grand Portage, MN (33.3 mi)
Lake Superior, Lake Superior, MI (38.1 mi)
Baptism River, Illgen City, MN (49.7 mi)
Washington Creek, Windigo, MI (56.1 mi)
Kawishiwi River, Ely, MN (57.2 mi)
Dunka River, Babbitt, MN (71.4 mi)
Dunka River, Babbitt, MN (71.7 mi)
Partrige River, Babbitt, MN (74.9 mi)
Lake Superior, Two Harbors, MN (80.5 mi)
Chequamegon Bay, Ashland, WI (81.7 mi)
Saint Louis River, Hoyt Lakes, MN (81.9 mi)
Lake Superior, Calumet, MI (86.9 mi)
Presque Isle River, Tula, MI (87.2 mi)

Weather for Grand Marais, Minnesota

Current Weather

46.9°F
Partly Cloudy
Partly Cloudy
45.1°F
56.9°F
100%
ENE 4.3 mph
8.9 mph
57.7°F
54.9°F
0 in
0%
0 mi
1015 mbar
0.4

Five Day Weather Forecast

Partly Cloudy
Tue
H: 61°F
L: 53°F
Heavy rain
Wed
H: 61°F
L: 47°F
Patchy rain nearby
Thu
H: 61°F
L: 46°F
Patchy rain nearby
Fri
H: 57°F
L: 45°F
Patchy rain nearby
Sat
H: 51°F
L: 43°F

Air Quality

AQI: 1 - Good
PM2.5: 5 μg/m3
PM10: 5.3 μg/m3
Carbon Monoxide: 127 μg/m3
Nitrogen Dioxide: 1 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 72 μg/m3

Astronomical

Sunrise: 5:03 AM
Sun Transit: 1:00 PM
Sunset: 8:58 PM
Daylight: 15 hrs 55 mins
Moonrise: 1:37 AM
Moon Transit: 5:27 AM
Moonset: 2:28 PM
Moon Phase: Last Quarter
Moon Illumination: 21.6%

Best Times for Fishing or Hunting

Major Periods

4:57 AM - 7:27 AM
4:57 AM - 7:27 AM

Minor Periods

1:58 PM - 3:28 PM
1:07 AM - 2:37 AM

Action Rating: 4 out of 5

Dense Fog Advisory issued June 9 at 1:15AM CDT until June 9 at 10:00AM CDT by NWS Duluth MN

Effective: Tue June 9, 2026, 1:15 AM
Expires: Tue June 9, 2026, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Carlton, South and Central St. Louis, Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, and Douglas Counties. This includes the Tribal Lands of the Red Cliff Band, the Fond du Lac Band, the Grand Portage Reservation, the Bad River Reservation and the Bois Forte Band, Lake Vermilion area. Other locations including the Apostle Islands National Lakeshore and Madeline Island. This also includes the Boundary Waters eastern and central area. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.
Tuesday, June 9, 2026

Weather Forecast

Partly Cloudy
61.2°F
53.4°F
56.4°F
93%
0 in
73%
0%
10.7 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 4.33 μg/m3
PM10: 4.55 μg/m3
Carbon Monoxide: 127.38 μg/m3
Nitrogen Dioxide: 1.8 μg/m3
Sulphur Dioxide: 0.34 μg/m3
Ozone: 72.33 μg/m3

Astronomical

Sunrise: 5:03 AM
Sun Transit: 1:00 PM
Sunset: 8:58 PM
Daylight: 15 hrs 55 mins
Moonrise: 1:37 AM
Moon Transit: 5:27 AM
Moonset: 2:28 PM
Moon Phase: Last Quarter
Moon Illumination: 21.6%

Best Times for Fishing or Hunting

Major Periods

4:57 AM - 7:27 AM
4:57 AM - 7:27 AM

Minor Periods

1:58 PM - 3:28 PM
1:07 AM - 2:37 AM

Action Rating: 4 out of 5

Wednesday, June 10, 2026

Weather Forecast

Heavy rain
61.2°F
47.1°F
54.7°F
97%
1.09 in
98%
0%
13.9 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 1.7 μg/m3
PM10: 1.85 μg/m3
Carbon Monoxide: 129.46 μg/m3
Nitrogen Dioxide: 1.27 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 77.75 μg/m3

Astronomical

Sunrise: 5:03 AM
Sun Transit: 1:00 PM
Sunset: 8:59 PM
Daylight: 15 hrs 56 mins
Moonrise: 1:53 AM
Moon Transit: 8:41 AM
Moonset: 3:46 PM
Moon Phase: Waning Crescent
Moon Illumination: 13.1%

Best Times for Fishing or Hunting

Major Periods

8:11 AM - 10:41 AM
8:33 PM - 11:03 PM

Minor Periods

3:16 PM - 4:46 PM
1:23 AM - 2:53 AM

Action Rating: 3 out of 5

Thursday, June 11, 2026

Weather Forecast

Patchy rain nearby
61°F
46°F
53.5°F
81%
0.02 in
73%
0%
18.3 mph
4.6


Air Quality

AQI: 1 - Good
PM2.5: 2.5 μg/m3
PM10: 2.99 μg/m3
Carbon Monoxide: 112.75 μg/m3
Nitrogen Dioxide: 1.17 μg/m3
Sulphur Dioxide: 0.23 μg/m3
Ozone: 74.67 μg/m3

Astronomical

Sunrise: 5:03 AM
Sun Transit: 1:01 PM
Sunset: 9:00 PM
Daylight: 15 hrs 57 mins
Moonrise: 2:13 AM
Moon Transit: 9:31 AM
Moonset: 5:10 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.5%

Best Times for Fishing or Hunting

Major Periods

9:26 PM - 11:56 PM
9:01 AM - 11:31 AM

Minor Periods

4:40 PM - 6:10 PM
1:43 AM - 3:13 AM

Action Rating: 3 out of 5

Friday, June 12, 2026

Weather Forecast

Patchy rain nearby
57.1°F
45.4°F
50.5°F
86%
0.11 in
84%
0%
16.3 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 0.94 μg/m3
PM10: 0.98 μg/m3
Carbon Monoxide: 113.29 μg/m3
Nitrogen Dioxide: 0.82 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 63.17 μg/m3

Astronomical

Sunrise: 5:03 AM
Sun Transit: 1:01 PM
Sunset: 9:00 PM
Daylight: 15 hrs 58 mins
Moonrise: 2:37 AM
Moon Transit: 10:27 AM
Moonset: 6:37 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:57 AM - 12:27 AM

Minor Periods

6:07 PM - 7:37 PM
2:07 AM - 3:37 AM

Action Rating: 2 out of 5

Saturday, June 13, 2026

Weather Forecast

Patchy rain nearby
51°F
42.9°F
47.1°F
82%
0.06 in
79%
0%
14.8 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 1.05 μg/m3
PM10: 1.09 μg/m3
Carbon Monoxide: 128.25 μg/m3
Nitrogen Dioxide: 0.78 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 55.63 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:01 PM
Sunset: 9:01 PM
Daylight: 15 hrs 58 mins
Moonrise: 3:09 AM
Moon Transit: 11:29 AM
Moonset: 8:04 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:59 AM - 1:29 PM

Minor Periods

7:34 PM - 9:04 PM
2:39 AM - 4:09 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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