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

48°F
Sunny
Sunny
42.6°F
54.9°F
77%
SW 13 mph
26.1 mph
51.4°F
45.6°F
0 in
0%
5 mi
1007 mbar
6.9

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 62°F
L: 51°F
Patchy rain nearby
Tue
H: 59°F
L: 45°F
Partly Cloudy
Wed
H: 56°F
L: 44°F
Patchy rain nearby
Thu
H: 62°F
L: 44°F
Partly Cloudy
Fri
H: 61°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 2.9 μg/m3
PM10: 3.1 μg/m3
Carbon Monoxide: 101 μg/m3
Nitrogen Dioxide: 0.6 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 76 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:01 PM
Sunset: 9:02 PM
Daylight: 15 hrs 59 mins
Moonrise: 4:58 AM
Moon Transit: 1:43 PM
Moonset: 10:23 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

12:36 AM - 3:06 AM
1:13 PM - 3:43 PM

Minor Periods

9:53 PM - 11:23 PM
4:28 AM - 5:58 AM

Action Rating: 3 out of 5

Small Craft Advisory issued June 15 at 2:43AM CDT until June 15 at 7:00PM CDT by NWS Duluth MN

Effective: Mon June 15, 2026, 2:43 AM
Expires: Mon June 15, 2026, 2:45 PM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 30 kt and waves 2 to 5 ft expected. * WHERE...Grand Portage to Grand Marais MN. * WHEN...From 7 AM this morning to 7 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 14 at 9:11PM CDT until June 15 at 7:00PM CDT by NWS Duluth MN

Effective: Sun June 14, 2026, 9:11 PM
Expires: Mon June 15, 2026, 9:15 AM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt and waves 2 to 4 ft expected. * WHERE...Grand Portage to Grand Marais MN. * WHEN...From 7 AM to 7 PM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.
Monday, June 15, 2026

Weather Forecast

Patchy rain nearby
62.4°F
50.5°F
55.7°F
60%
0.03 in
36%
0%
13 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 2.55 μg/m3
PM10: 2.74 μg/m3
Carbon Monoxide: 101.21 μg/m3
Nitrogen Dioxide: 0.9 μg/m3
Sulphur Dioxide: 0.11 μg/m3
Ozone: 69.25 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:01 PM
Sunset: 9:02 PM
Daylight: 15 hrs 59 mins
Moonrise: 4:58 AM
Moon Transit: 1:43 PM
Moonset: 10:23 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

12:36 AM - 3:06 AM
1:13 PM - 3:43 PM

Minor Periods

9:53 PM - 11:23 PM
4:28 AM - 5:58 AM

Action Rating: 3 out of 5

Tuesday, June 16, 2026

Weather Forecast

Patchy rain nearby
58.7°F
44.8°F
50.5°F
81%
0.1 in
69%
0%
8.5 mph
5.3


Air Quality

AQI: 1 - Good
PM2.5: 1.78 μg/m3
PM10: 1.84 μg/m3
Carbon Monoxide: 98.67 μg/m3
Nitrogen Dioxide: 1.27 μg/m3
Sulphur Dioxide: 0.19 μg/m3
Ozone: 52.75 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:02 PM
Sunset: 9:02 PM
Daylight: 16 hrs mins
Moonrise: 6:16 AM
Moon Transit: 2:49 PM
Moonset: 11:07 PM
Moon Phase: New
Moon Illumination: 1.0%

Best Times for Fishing or Hunting

Major Periods

1:44 AM - 4:14 AM
2:19 PM - 4:49 PM

Minor Periods

12:00 AM - 12:00 AM
5:46 AM - 7:16 AM

Action Rating: 3 out of 5

Wednesday, June 17, 2026

Weather Forecast

Partly Cloudy
55.5°F
44.2°F
50°F
80%
0 in
19%
0%
8.7 mph
6.8


Air Quality

AQI: 1 - Good
PM2.5: 0.98 μg/m3
PM10: 1.07 μg/m3
Carbon Monoxide: 98.75 μg/m3
Nitrogen Dioxide: 0.9 μg/m3
Sulphur Dioxide: 0.11 μg/m3
Ozone: 57.13 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:02 PM
Sunset: 9:02 PM
Daylight: 16 hrs mins
Moonrise: 7:42 AM
Moon Transit: 3:49 PM
Moonset: 12:07 AM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%

Best Times for Fishing or Hunting

Major Periods

2:47 AM - 5:17 AM
3:19 PM - 5:49 PM

Minor Periods

7:12 AM - 8:42 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, June 18, 2026

Weather Forecast

Patchy rain nearby
62°F
44.4°F
53.7°F
72%
0.04 in
57%
0%
11 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 1.18 μg/m3
PM10: 1.3 μg/m3
Carbon Monoxide: 101.26 μg/m3
Nitrogen Dioxide: 0.77 μg/m3
Sulphur Dioxide: 0.19 μg/m3
Ozone: 62.75 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:02 PM
Sunset: 9:03 PM
Daylight: 16 hrs mins
Moonrise: 9:08 AM
Moon Transit: 4:44 PM
Moonset: 12:39 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

3:45 AM - 6:15 AM
4:14 PM - 6:44 PM

Minor Periods

8:38 AM - 10:08 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, June 19, 2026

Weather Forecast

Partly Cloudy
60.7°F
43.7°F
52.8°F
65%
0 in
9%
0%
12.5 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 0.71 μg/m3
PM10: 0.74 μg/m3
Carbon Monoxide: 117.38 μg/m3
Nitrogen Dioxide: 0.71 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 52.25 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:02 PM
Sunset: 9:03 PM
Daylight: 16 hrs 1 mins
Moonrise: 10:30 AM
Moon Transit: 5:33 PM
Moonset: 12:02 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%

Best Times for Fishing or Hunting

Major Periods

4:36 AM - 7:06 AM
5:03 PM - 7:33 PM

Minor Periods

10:00 AM - 11:30 AM
12:00 AM - 12:00 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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