Water Temperature of the Grand Portage River in Grand Portage, MN

Current Water Temperature

32.2°F

Measurement Time: Saturday, December 20, 2025, 12:15 AM CST

Temperature Locations

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Local Points of Interest

Grand Portage Bay; Lake Superior

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Grand Portage River

Station Name: GRAND PORTAGE RIVER AT GRAND PORTAGE MN
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 623 feet / 190 meters

Nearest Address:
1 Upper Rd
Grand Portage, MN 55605
Cook County

GPS Coordinates: 47.9634982, -89.6834233

Nearby Water Temperatures

Washington Creek, Windigo, MI (25.0 mi)
Lake Superior, Grand Marais, MN (33.3 mi)
Grand Marais Harbor, Grand Marais, MN (33.9 mi)
Lake Superior, Lake Superior, MI (43.7 mi)
Poplar River, Lutsen, MN (52.6 mi)
Lake Superior, Calumet, MI (69.3 mi)
Pilgrim River, Houghton, MI (80.5 mi)
Baptism River, Illgen City, MN (82.8 mi)
Kawishiwi River, Ely, MN (85.7 mi)
Lake Superior, Isle Royale, MI (90.4 mi)
Keweenaw Bay, Jacobsville, MI (91.2 mi)
West Branch Ontonagon River, Bergland, MI (95.2 mi)
Presque Isle River, Tula, MI (98.0 mi)
Sturgeon River, Pelkie, MI (98.0 mi)
Falls River, L'Anse, MI (102.8 mi)

Weather for Grand Portage, Minnesota

Current Weather

23.5°F
Overcast
Conditions: Overcast
Humidity: 79%
Feels Like: 12.2°F
Wind: SSW 11.9 mph
Wind Gusts: 18.4 mph
Pressure: 29.37 in
Precipitation: 0.03 in
Cloud Cover: 100%
Visibility: 14 mi
UV Index: 0

Five Day Weather Forecast

Moderate or heavy snow showers
Sat
H: 23°F
L: 3°F
Sunny
Sun
H: 14°F
L: -3°F
Light freezing rain
Mon
H: 29°F
L: 20°F
Light freezing rain
Tue
H: 29°F
L: 11°F
Light freezing rain
Wed
H: 31°F
L: 8°F

Air Quality

AQI: 1 - Good
PM2.5: 1.95 μg/m3
PM10: 2.05 μg/m3
Carbon Monoxide: 152.85 μg/m3
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 75 μg/m3

Astronomical

Sunrise: 7:45 AM
Sun Transit: 11:56 AM
Sunset: 4:08 PM
Daylight: 8 hrs 23 mins
Moonrise: 8:49 AM
Moon Transit: 12:31 AM
Moonset: 4:17 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:01 AM - 2:31 PM

Minor Periods

3:47 PM - 5:17 PM
8:19 AM - 9:49 AM

Action Rating: 4 out of 5

Winter Weather Advisory issued December 19 at 1:38PM CST until December 20 at 6:00AM CST by NWS Duluth MN

Effective: Fri December 19, 2025, 1:38 PM
Expires: Sat December 20, 2025, 1:45 AM

* WHAT...Lake enhanced snow expected. Total snow accumulations between 2 and 5 inches. Winds gusting as high as 35 mph. * WHERE...Southern Cook County. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...From 6 PM this evening to 6 AM CST Saturday. * IMPACTS...Plan on slippery road conditions.

Slow down and use caution while traveling. Call 511 or visit www.511mn.org for Minnesota road information.


Winter Weather Advisory issued December 19 at 9:24PM CST until December 20 at 6:00AM CST by NWS Duluth MN

Effective: Fri December 19, 2025, 9:24 PM
Expires: Sat December 20, 2025, 6:00 AM

* WHAT...Lake enhanced snow. Additional snow accumulations between 1 and 3 inches. Winds gusting as high as 35 mph. * WHERE...Southern Cook County. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...Until 6 AM CST Saturday. * IMPACTS...Plan on slippery road conditions.

Slow down and use caution while traveling. Call 511 or visit www.511mn.org for Minnesota road information.
Saturday, December 20, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 12°F
Average Humidity: 74%
Chance of Rain: 76%
Wind: 21.3 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 2.15 μg/m3
PM10: 2.28 μg/m3
Carbon Monoxide: 151.93 μg/m3
Nitrogen Dioxide: 2.09 μg/m3
Sulphur Dioxide: 1.31 μg/m3
Ozone: 77 μg/m3

Astronomical

Sunrise: 7:45 AM
Sun Transit: 11:56 AM
Sunset: 4:08 PM
Daylight: 8 hrs 23 mins
Moonrise: 8:49 AM
Moon Transit: 12:31 AM
Moonset: 4:17 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:01 AM - 2:31 PM

Minor Periods

3:47 PM - 5:17 PM
8:19 AM - 9:49 AM

Action Rating: 4 out of 5

Sunday, December 21, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 5.2°F
Average Humidity: 70%
Chance of Rain: 0%
Wind: 22.1 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 1.6 μg/m3
PM10: 1.77 μg/m3
Carbon Monoxide: 147.65 μg/m3
Nitrogen Dioxide: 1.75 μg/m3
Sulphur Dioxide: 1.34 μg/m3
Ozone: 76.4 μg/m3

Astronomical

Sunrise: 7:46 AM
Sun Transit: 11:57 AM
Sunset: 4:08 PM
Daylight: 8 hrs 23 mins
Moonrise: 9:29 AM
Moon Transit: 1:23 PM
Moonset: 5:22 PM
Moon Phase: New
Moon Illumination: 1.5%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
12:53 AM - 3:23 PM

Minor Periods

4:52 PM - 6:22 PM
8:59 AM - 10:29 AM

Action Rating: 3 out of 5

Monday, December 22, 2025

Weather Forecast

Conditions: Light freezing rain
Average Temperature: 25.1°F
Average Humidity: 88%
Chance of Rain: 84%
Wind: 13.6 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 3.98 μg/m3
PM10: 4.47 μg/m3
Carbon Monoxide: 164.41 μg/m3
Nitrogen Dioxide: 3.53 μg/m3
Sulphur Dioxide: 1.83 μg/m3
Ozone: 71.68 μg/m3

Astronomical

Sunrise: 7:46 AM
Sun Transit: 11:57 AM
Sunset: 4:09 PM
Daylight: 8 hrs 23 mins
Moonrise: 10:01 AM
Moon Transit: 2:13 PM
Moonset: 6:34 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.5%

Best Times for Fishing or Hunting

Major Periods

1:21 AM - 3:51 AM
1:43 PM - 4:13 PM

Minor Periods

6:04 PM - 7:34 PM
9:31 AM - 11:01 AM

Action Rating: 3 out of 5

Tuesday, December 23, 2025

Weather Forecast

Conditions: Light freezing rain
Average Temperature: 22.5°F
Average Humidity: 89%
Chance of Rain: 88%
Wind: 11.4 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 2.74 μg/m3
PM10: 2.93 μg/m3
Carbon Monoxide: 165.17 μg/m3
Nitrogen Dioxide: 3.77 μg/m3
Sulphur Dioxide: 1.84 μg/m3
Ozone: 61.64 μg/m3

Astronomical

Sunrise: 7:47 AM
Sun Transit: 11:58 AM
Sunset: 4:10 PM
Daylight: 8 hrs 23 mins
Moonrise: 10:25 AM
Moon Transit: 3:01 PM
Moonset: 7:47 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.7%

Best Times for Fishing or Hunting

Major Periods

2:10 AM - 4:40 AM
2:31 PM - 5:01 PM

Minor Periods

7:17 PM - 8:47 PM
9:55 AM - 11:25 AM

Action Rating: 2 out of 5

Wednesday, December 24, 2025

Weather Forecast

Conditions: Light freezing rain
Average Temperature: 19.1°F
Average Humidity: 92%
Chance of Rain: 77%
Wind: 12.3 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 2.53 μg/m3
PM10: 2.69 μg/m3
Carbon Monoxide: 171.77 μg/m3
Nitrogen Dioxide: 2.07 μg/m3
Sulphur Dioxide: 1.7 μg/m3
Ozone: 69.46 μg/m3

Astronomical

Sunrise: 7:47 AM
Sun Transit: 11:58 AM
Sunset: 4:10 PM
Daylight: 8 hrs 23 mins
Moonrise: 10:45 AM
Moon Transit: 3:47 PM
Moonset: 9:01 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.9%

Best Times for Fishing or Hunting

Major Periods

2:57 AM - 5:27 AM
3:17 PM - 5:47 PM

Minor Periods

8:31 PM - 10:01 PM
10:15 AM - 11:45 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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