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

Current Water Temperature

32.0°F

Measurement Time: Saturday, May 16, 2026, 3:37 AM CDT

Temperature Locations

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Local Points of Interest

Grand Portage Bay; Lake Superior

Grand Portage River

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

Elevation Above Sea Level: 623 feet

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 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 mi)
Sturgeon River, Pelkie, MI (98 mi)
Falls River, L'Anse, MI (102.8 mi)

Weather for Grand Portage, Minnesota

Current Weather

56.4°F
Sunny
Sunny
53.1°F
56.4°F
55%
WNW 15.7 mph
26 mph
53.1°F
40.7°F
0 in
0%
6 mi
1003 mbar
1.1

Five Day Weather Forecast

Sunny
Sat
H: 57°F
L: 43°F
Patchy rain nearby
Sun
H: 45°F
L: 38°F
Heavy rain
Mon
H: 57°F
L: 39°F
Patchy rain nearby
Tue
H: 38°F
L: 34°F
Patchy rain nearby
Wed
H: 43°F
L: 30°F

Air Quality

AQI: 1 - Good
PM2.5: 1.05 μg/m3
PM10: 1.15 μg/m3
Carbon Monoxide: 123.85 μg/m3
Nitrogen Dioxide: 1.15 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 76 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:55 AM
Sunset: 8:33 PM
Daylight: 15 hrs 14 mins
Moonrise: 4:38 AM
Moon Transit: 12:44 AM
Moonset: 9:09 PM
Moon Phase: New
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:14 AM - 2:44 PM

Minor Periods

8:39 PM - 10:09 PM
4:08 AM - 5:38 AM

Action Rating: 5 out of 5

Special Weather Statement issued May 15 at 9:53PM CDT by NWS Duluth MN

Effective: Fri May 15, 2026, 9:53 PM
Expires: Sat May 16, 2026, 4:00 AM

Dry conditions and gusty winds will lead to near-critical fire weather conditions Saturday. West winds in the morning will turn northwesterly behind a cold front. Sustained winds of 10 to 15 mph with gusts of 20 to 25 mph are forecast. Minimum relative humidity values of 20 to 30 percent are also expected. Together, these conditions could lead to the rapid spread of fires. Check burning restrictions and fire danger before burning. For more information on burning restrictions for Minnesota, see www.dnr.state.mn.us/forestry/fire/firerating_restrictions.html.


Special Weather Statement issued May 16 at 3:48AM CDT by NWS Duluth MN

Effective: Sat May 16, 2026, 3:48 AM
Expires: Sat May 16, 2026, 10:00 AM

Dry conditions and gusty winds will lead to near-critical fire weather conditions Saturday. West winds in the morning will turn northwesterly behind a cold front. Sustained winds of 10 to 15 mph with gusts of 20 to 25 mph are forecast. Minimum relative humidity values of 20 to 30 percent are also expected. Together, these conditions could lead to the rapid spread of fires. Check burning restrictions and fire danger before burning. For more information on burning restrictions for Minnesota, see www.dnr.state.mn.us/forestry/fire/firerating_restrictions.html.


Saturday, May 16, 2026

Weather Forecast

Sunny
57.4°F
43.2°F
54.8°F
52%
0 in
0%
0%
15.7 mph
6.1


Air Quality

AQI: 1 - Good
PM2.5: 3.47 μg/m3
PM10: 3.81 μg/m3
Carbon Monoxide: 125.93 μg/m3
Nitrogen Dioxide: 1.4 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 83.04 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:55 AM
Sunset: 8:33 PM
Daylight: 15 hrs 14 mins
Moonrise: 4:38 AM
Moon Transit: 12:44 AM
Moonset: 9:09 PM
Moon Phase: New
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:14 AM - 2:44 PM

Minor Periods

8:39 PM - 10:09 PM
4:08 AM - 5:38 AM

Action Rating: 5 out of 5

Sunday, May 17, 2026

Weather Forecast

Patchy rain nearby
45.2°F
37.5°F
41°F
77%
0.09 in
82%
0%
14.5 mph
4.9


Air Quality

AQI: 1 - Good
PM2.5: 1.09 μg/m3
PM10: 1.09 μg/m3
Carbon Monoxide: 117.37 μg/m3
Nitrogen Dioxide: 1.6 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 60.84 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:55 AM
Sunset: 8:34 PM
Daylight: 15 hrs 17 mins
Moonrise: 5:16 AM
Moon Transit: 1:48 PM
Moonset: 10:33 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:48 AM - 3:18 AM
1:18 PM - 3:48 PM

Minor Periods

10:03 PM - 11:33 PM
4:46 AM - 6:16 AM

Action Rating: 3 out of 5

Monday, May 18, 2026

Weather Forecast

Heavy rain
56.6°F
38.9°F
48.5°F
98%
0.95 in
84%
0%
12.3 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 1.64 μg/m3
PM10: 1.68 μg/m3
Carbon Monoxide: 122.69 μg/m3
Nitrogen Dioxide: 1.59 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 66.48 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 12:55 AM
Sunset: 8:35 PM
Daylight: 15 hrs 19 mins
Moonrise: 6:09 AM
Moon Transit: 2:55 PM
Moonset: 11:42 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

1:54 AM - 4:24 AM
2:25 PM - 4:55 PM

Minor Periods

12:00 AM - 12:00 AM
5:39 AM - 7:09 AM

Action Rating: 4 out of 5

Tuesday, May 19, 2026

Weather Forecast

Patchy rain nearby
38.1°F
33.6°F
36.5°F
93%
0.15 in
88%
0%
8.7 mph
2.5


Air Quality

AQI: 1 - Good
PM2.5: 1.07 μg/m3
PM10: 1.07 μg/m3
Carbon Monoxide: 121.12 μg/m3
Nitrogen Dioxide: 1.69 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 67.72 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 12:55 AM
Sunset: 8:36 PM
Daylight: 15 hrs 21 mins
Moonrise: 7:19 AM
Moon Transit: 4:01 PM
Moonset: 12:42 AM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

3:01 AM - 5:31 AM
3:31 PM - 6:01 PM

Minor Periods

6:49 AM - 8:19 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, May 20, 2026

Weather Forecast

Patchy rain nearby
42.7°F
29.7°F
35.6°F
73%
0.01 in
89%
0%
14.1 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 0.9 μg/m3
PM10: 0.92 μg/m3
Carbon Monoxide: 111.8 μg/m3
Nitrogen Dioxide: 1.42 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 68.92 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 12:55 AM
Sunset: 8:38 PM
Daylight: 15 hrs 24 mins
Moonrise: 8:40 AM
Moon Transit: 5:03 PM
Moonset: 12:34 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

4:06 AM - 6:36 AM
4:33 PM - 7:03 PM

Minor Periods

8:10 AM - 9:40 AM
12:04 AM - 1:34 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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