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

55°F
Sunny
Sunny
52.7°F
55.1°F
77%
E 8.5 mph
16.6 mph
53.3°F
51.6°F
0 in
0%
6 mi
1014 mbar
1.3

Five Day Weather Forecast

Moderate rain
Wed
H: 55°F
L: 52°F
Sunny
Thu
H: 60°F
L: 48°F
Sunny
Fri
H: 62°F
L: 50°F
Partly Cloudy
Sat
H: 63°F
L: 51°F
Partly Cloudy
Sun
H: 66°F
L: 51°F

Air Quality

AQI: 1 - Good
PM2.5: 0.6 μg/m3
PM10: 0.6 μg/m3
Carbon Monoxide: 98 μg/m3
Nitrogen Dioxide: 0.7 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 66 μg/m3

Astronomical

Sunrise: 5:04 AM
Sun Transit: 1:03 PM
Sunset: 9:04 PM
Daylight: 16 hrs mins
Moonrise: 4:30 PM
Moon Transit: 9:11 PM
Moonset: 1:24 AM
Moon Phase: First Quarter
Moon Illumination: 71.7%

Best Times for Fishing or Hunting

Major Periods

8:16 AM - 10:46 AM
8:41 PM - 11:11 PM

Minor Periods

4:00 PM - 5:30 PM
12:54 AM - 2:24 AM

Action Rating: 3 out of 5

Small Craft Advisory issued June 24 at 3:23AM CDT until June 24 at 8:00PM CDT by NWS Duluth MN

Effective: Wed June 24, 2026, 3:23 AM
Expires: Wed June 24, 2026, 5:00 PM

* WHAT...Northeast winds 10 to 15 kts with gusts up to 25 kt and waves 1 to 3 ft expected. * WHERE...Grand Portage to Grand Marais MN and Grand Marais to Taconite Harbor MN. * WHEN...From noon today to 8 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

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


Small Craft Advisory issued June 24 at 10:12AM CDT until June 24 at 8:00PM CDT by NWS Duluth MN

Effective: Wed June 24, 2026, 10:12 AM
Expires: Wed June 24, 2026, 8:00 PM

* WHAT...Northeast winds 10 to 15 kts with gusts up to 25 kt and waves 1 to 3 ft expected. * WHERE...Grand Portage to Grand Marais MN and Grand Marais to Taconite Harbor MN. * WHEN...Until 8 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

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


Small Craft Advisory issued June 24 at 2:32PM CDT until June 24 at 8:00PM CDT by NWS Duluth MN

Effective: Wed June 24, 2026, 2:32 PM
Expires: Wed June 24, 2026, 8:00 PM

* WHAT...Northeast winds 10 to 15 kts with gusts up to 25 kt and waves 1 to 3 ft expected. * WHERE...Grand Portage to Grand Marais MN and Grand Marais to Taconite Harbor MN. * WHEN...Until 8 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.
Wednesday, June 24, 2026

Weather Forecast

Moderate rain
55.4°F
52.3°F
55°F
78%
0.36 in
73%
0%
11.4 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 0.62 μg/m3
PM10: 0.63 μg/m3
Carbon Monoxide: 94 μg/m3
Nitrogen Dioxide: 0.82 μg/m3
Sulphur Dioxide: 0.18 μg/m3
Ozone: 58.08 μg/m3

Astronomical

Sunrise: 5:04 AM
Sun Transit: 1:03 PM
Sunset: 9:04 PM
Daylight: 16 hrs mins
Moonrise: 4:30 PM
Moon Transit: 9:11 PM
Moonset: 1:24 AM
Moon Phase: First Quarter
Moon Illumination: 71.7%

Best Times for Fishing or Hunting

Major Periods

8:16 AM - 10:46 AM
8:41 PM - 11:11 PM

Minor Periods

4:00 PM - 5:30 PM
12:54 AM - 2:24 AM

Action Rating: 3 out of 5

Thursday, June 25, 2026

Weather Forecast

Sunny
60°F
47.8°F
55.5°F
73%
0 in
8%
0%
7.2 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 1.96 μg/m3
PM10: 2.17 μg/m3
Carbon Monoxide: 97.13 μg/m3
Nitrogen Dioxide: 1.46 μg/m3
Sulphur Dioxide: 0.45 μg/m3
Ozone: 63.67 μg/m3

Astronomical

Sunrise: 5:04 AM
Sun Transit: 1:04 PM
Sunset: 9:04 PM
Daylight: 16 hrs mins
Moonrise: 5:39 PM
Moon Transit: 9:57 PM
Moonset: 1:44 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.2%

Best Times for Fishing or Hunting

Major Periods

9:01 AM - 11:31 AM
9:27 PM - 11:57 PM

Minor Periods

5:09 PM - 6:39 PM
1:14 AM - 2:44 AM

Action Rating: 3 out of 5

Friday, June 26, 2026

Weather Forecast

Sunny
61.8°F
50.1°F
56.2°F
62%
0 in
5%
0%
6.5 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 4.65 μg/m3
PM10: 5.13 μg/m3
Carbon Monoxide: 97.42 μg/m3
Nitrogen Dioxide: 1.32 μg/m3
Sulphur Dioxide: 0.29 μg/m3
Ozone: 66.21 μg/m3

Astronomical

Sunrise: 5:04 AM
Sun Transit: 1:04 PM
Sunset: 9:04 PM
Daylight: 15 hrs 59 mins
Moonrise: 6:47 PM
Moon Transit: 10:46 PM
Moonset: 2:09 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 89.2%

Best Times for Fishing or Hunting

Major Periods

9:48 AM - 12:18 AM
12:00 AM - 12:00 AM

Minor Periods

6:17 PM - 7:47 PM
1:39 AM - 3:09 AM

Action Rating: 2 out of 5

Saturday, June 27, 2026

Weather Forecast

Partly Cloudy
63°F
50.9°F
56.3°F
68%
0 in
8%
0%
13.6 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 2.8 μg/m3
PM10: 3.12 μg/m3
Carbon Monoxide: 98.6 μg/m3
Nitrogen Dioxide: 0.65 μg/m3
Sulphur Dioxide: 0.15 μg/m3
Ozone: 69.21 μg/m3

Astronomical

Sunrise: 5:05 AM
Sun Transit: 1:04 PM
Sunset: 9:04 PM
Daylight: 15 hrs 59 mins
Moonrise: 7:50 PM
Moon Transit: 11:36 PM
Moonset: 2:41 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.2%

Best Times for Fishing or Hunting

Major Periods

10:38 AM - 1:08 PM
12:00 AM - 12:00 AM

Minor Periods

7:20 PM - 8:50 PM
2:11 AM - 3:41 AM

Action Rating: 3 out of 5

Sunday, June 28, 2026

Weather Forecast

Partly Cloudy
66.1°F
51°F
58.1°F
76%
0 in
12%
0%
17.2 mph
8.2


Air Quality

AQI: 1 - Good
PM2.5: 2.39 μg/m3
PM10: 2.63 μg/m3
Carbon Monoxide: 114.88 μg/m3
Nitrogen Dioxide: 0.7 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 66.25 μg/m3

Astronomical

Sunrise: 5:05 AM
Sun Transit: 1:04 PM
Sunset: 9:04 PM
Daylight: 15 hrs 58 mins
Moonrise: 8:45 PM
Moon Transit: 12:00 AM
Moonset: 3:21 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.8%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

8:15 PM - 9:45 PM
2:51 AM - 4:21 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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