Water Temperature of Lake Superior in Grand Marais, MN
Current Water Temperature
50.0°F
Measurement Time: Thursday, September 8, 2022, 8:00 AM CDT
Temperature Locations
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Lake Superior
Station Name: Grand Marais
Data Source: USGS
Elevation Above Sea Level: 607 feet / 185 meters
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
39°F

Conditions: Partly Cloudy
Humidity: 76%
Feels Like: 34.5°F
Wind: NW 6 mph
Wind Gusts: 8.2 mph
Humidity: 76%
Feels Like: 34.5°F
Wind: NW 6 mph
Wind Gusts: 8.2 mph
Pressure: 30.16 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 1.3
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 1.3
Five Day Weather Forecast

Sat
H: 43°F
L: 34°F

Sun
H: 44°F
L: 34°F

Mon
H: 41°F
L: 33°F

Tue
H: 44°F
L: 32°F

Wed
H: 43°F
L: 33°F
Air Quality
AQI:
1 - Good
PM2.5:
1.51 μg/m3
PM10:
1.85 μg/m3
Carbon Monoxide: 300.4 μg/m3
Nitrogen Dioxide: 5.54 μg/m3
Sulphur Dioxide: 0.17 μg/m3
Ozone: 65 μg/m3
Nitrogen Dioxide: 5.54 μg/m3
Sulphur Dioxide: 0.17 μg/m3
Ozone: 65 μg/m3
Astronomical
Sunrise: 6:04 AM
Sun Transit: 1:00 PM
Sunset: 7:57 PM
Daylight: 13 hrs 53 mins
Sun Transit: 1:00 PM
Sunset: 7:57 PM
Daylight: 13 hrs 53 mins
Moonrise: 2:17 AM
Moon Transit: 5:58 AM
Moonset: 9:43 AM
Moon Phase: Last Quarter
Moon Illumination: 49.0%
Moon Transit: 5:58 AM
Moonset: 9:43 AM
Moon Phase: Last Quarter
Moon Illumination: 49.0%
Best Times for Fishing or Hunting
Major Periods
5:28 AM - 7:58 AM5:52 PM - 8:22 PM
Minor Periods
9:13 AM - 10:43 AM1:47 AM - 3:17 AM
Action Rating: 3 out of 5
Saturday, April 19, 2025
Weather Forecast
Conditions: Partly Cloudy
Average Temperature: 37.5°F
Average Humidity: 78%
Average Temperature: 37.5°F
Average Humidity: 78%
Chance of Rain: 0%
Wind: 10.1 mph
UV Index: 0.9
Wind: 10.1 mph
UV Index: 0.9
Air Quality
AQI:
1 - Good
PM2.5:
2.34 μg/m3
PM10:
3.62 μg/m3
Carbon Monoxide: 288.72 μg/m3
Nitrogen Dioxide: 1.65 μg/m3
Sulphur Dioxide: 0.09 μg/m3
Ozone: 75.96 μg/m3
Nitrogen Dioxide: 1.65 μg/m3
Sulphur Dioxide: 0.09 μg/m3
Ozone: 75.96 μg/m3
Astronomical
Sunrise: 6:04 AM
Sun Transit: 1:00 PM
Sunset: 7:57 PM
Daylight: 13 hrs 53 mins
Sun Transit: 1:00 PM
Sunset: 7:57 PM
Daylight: 13 hrs 53 mins
Moonrise: 2:17 AM
Moon Transit: 5:58 AM
Moonset: 9:43 AM
Moon Phase: Last Quarter
Moon Illumination: 49.0%
Moon Transit: 5:58 AM
Moonset: 9:43 AM
Moon Phase: Last Quarter
Moon Illumination: 49.0%
Best Times for Fishing or Hunting
Major Periods
5:28 AM - 7:58 AM5:52 PM - 8:22 PM
Minor Periods
9:13 AM - 10:43 AM1:47 AM - 3:17 AM
Action Rating: 3 out of 5
Sunday, April 20, 2025
Weather Forecast
Conditions: Partly Cloudy
Average Temperature: 38.8°F
Average Humidity: 72%
Average Temperature: 38.8°F
Average Humidity: 72%
Chance of Rain: 0%
Wind: 13.4 mph
UV Index: 1.2
Wind: 13.4 mph
UV Index: 1.2
Air Quality
AQI:
1 - Good
PM2.5:
1.69 μg/m3
PM10:
2.34 μg/m3
Carbon Monoxide: 287.24 μg/m3
Nitrogen Dioxide: 3.18 μg/m3
Sulphur Dioxide: 0.15 μg/m3
Ozone: 69.28 μg/m3
Nitrogen Dioxide: 3.18 μg/m3
Sulphur Dioxide: 0.15 μg/m3
Ozone: 69.28 μg/m3
Astronomical
Sunrise: 6:02 AM
Sun Transit: 1:00 PM
Sunset: 7:59 PM
Daylight: 13 hrs 57 mins
Sun Transit: 1:00 PM
Sunset: 7:59 PM
Daylight: 13 hrs 57 mins
Moonrise: 2:57 AM
Moon Transit: 6:52 AM
Moonset: 10:54 AM
Moon Phase: Last Quarter
Moon Illumination: 37.8%
Moon Transit: 6:52 AM
Moonset: 10:54 AM
Moon Phase: Last Quarter
Moon Illumination: 37.8%
Best Times for Fishing or Hunting
Major Periods
6:22 AM - 8:52 AM6:46 PM - 9:16 PM
Minor Periods
10:24 AM - 11:54 AM2:27 AM - 3:57 AM
Action Rating: 3 out of 5
Monday, April 21, 2025
Weather Forecast
Conditions: Moderate rain
Average Temperature: 37.3°F
Average Humidity: 79%
Average Temperature: 37.3°F
Average Humidity: 79%
Chance of Rain: 76%
Wind: 15.4 mph
UV Index: 0.8
Wind: 15.4 mph
UV Index: 0.8
Air Quality
AQI:
1 - Good
PM2.5:
2.83 μg/m3
PM10:
3.91 μg/m3
Carbon Monoxide: 270.39 μg/m3
Nitrogen Dioxide: 1.6 μg/m3
Sulphur Dioxide: 0.44 μg/m3
Ozone: 84.68 μg/m3
Nitrogen Dioxide: 1.6 μg/m3
Sulphur Dioxide: 0.44 μg/m3
Ozone: 84.68 μg/m3
Astronomical
Sunrise: 6:01 AM
Sun Transit: 1:00 PM
Sunset: 8:00 PM
Daylight: 14 hrs mins
Sun Transit: 1:00 PM
Sunset: 8:00 PM
Daylight: 14 hrs mins
Moonrise: 3:28 AM
Moon Transit: 7:44 AM
Moonset: 12:10 AM
Moon Phase: Last Quarter
Moon Illumination: 27.2%
Moon Transit: 7:44 AM
Moonset: 12:10 AM
Moon Phase: Last Quarter
Moon Illumination: 27.2%
Best Times for Fishing or Hunting
Major Periods
7:14 AM - 9:44 AM7:37 PM - 10:07 PM
Minor Periods
11:40 AM - 1:10 PM2:58 AM - 4:28 AM
Action Rating: 3 out of 5
Tuesday, April 22, 2025
Weather Forecast
Conditions: Patchy rain nearby
Average Temperature: 36.9°F
Average Humidity: 77%
Average Temperature: 36.9°F
Average Humidity: 77%
Chance of Rain: 84%
Wind: 13.6 mph
UV Index: 1.1
Wind: 13.6 mph
UV Index: 1.1
Air Quality
AQI:
1 - Good
PM2.5:
3.52 μg/m3
PM10:
5.33 μg/m3
Carbon Monoxide: 257.77 μg/m3
Nitrogen Dioxide: 1.55 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 85.2 μg/m3
Nitrogen Dioxide: 1.55 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 85.2 μg/m3
Astronomical
Sunrise: 5:59 AM
Sun Transit: 1:00 PM
Sunset: 8:02 PM
Daylight: 14 hrs 3 mins
Sun Transit: 1:00 PM
Sunset: 8:02 PM
Daylight: 14 hrs 3 mins
Moonrise: 3:53 AM
Moon Transit: 8:35 AM
Moonset: 1:30 PM
Moon Phase: Last Quarter
Moon Illumination: 17.8%
Moon Transit: 8:35 AM
Moonset: 1:30 PM
Moon Phase: Last Quarter
Moon Illumination: 17.8%
Best Times for Fishing or Hunting
Major Periods
8:05 AM - 10:35 AM8:28 PM - 10:58 PM
Minor Periods
1:00 PM - 2:30 PM3:23 AM - 4:53 AM
Action Rating: 3 out of 5
Wednesday, April 23, 2025
Weather Forecast
Conditions: Overcast
Average Temperature: 38.1°F
Average Humidity: 93%
Average Temperature: 38.1°F
Average Humidity: 93%
Chance of Rain: 0%
Wind: 9.6 mph
UV Index: 0
Wind: 9.6 mph
UV Index: 0
Air Quality
AQI:
1 - Good
PM2.5:
1.99 μg/m3
PM10:
2.58 μg/m3
Carbon Monoxide: 258.96 μg/m3
Nitrogen Dioxide: 1.64 μg/m3
Sulphur Dioxide: 0.41 μg/m3
Ozone: 94.54 μg/m3
Nitrogen Dioxide: 1.64 μg/m3
Sulphur Dioxide: 0.41 μg/m3
Ozone: 94.54 μg/m3
Astronomical
Sunrise: 5:57 AM
Sun Transit: 1:00 PM
Sunset: 8:03 PM
Daylight: 14 hrs 6 mins
Sun Transit: 1:00 PM
Sunset: 8:03 PM
Daylight: 14 hrs 6 mins
Moonrise: 4:13 AM
Moon Transit: 9:25 AM
Moonset: 2:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.0%
Moon Transit: 9:25 AM
Moonset: 2:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.0%
Best Times for Fishing or Hunting
Major Periods
8:55 AM - 11:25 AM9:17 PM - 11:47 PM
Minor Periods
2:21 PM - 3:51 PM3:43 AM - 5:13 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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