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

Current Water Temperature

32.0°F

Measurement Time: Saturday, July 18, 2026, 5:32 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

71.2°F
Smoky haze
Smoky haze
59.5°F
76.2°F
66%
N 7.8 mph
11.1 mph
71.2°F
59.4°F
0 in
17%
4 mi
1012 mbar
0.7

Five Day Weather Forecast

Smoky haze
Sat
H: 75°F
L: 62°F
Smoky haze
Sun
H: 71°F
L: 58°F
Sunny
Mon
H: 86°F
L: 63°F
Smoky haze
Tue
H: 63°F
L: 52°F
Smoky haze
Wed
H: 69°F
L: 52°F

Air Quality

AQI: 2 - Moderate
PM2.5: 90.6 μg/m3
PM10: 91.3 μg/m3
Carbon Monoxide: 1050 μg/m3
Nitrogen Dioxide: 3.1 μg/m3
Sulphur Dioxide: 6.7 μg/m3
Ozone: 170 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 1:05 PM
Sunset: 8:51 PM
Daylight: 15 hrs 33 mins
Moonrise: 10:39 AM
Moon Transit: 4:53 PM
Moonset: 10:55 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

4:04 AM - 6:34 AM
4:23 PM - 6:53 PM

Minor Periods

10:25 PM - 11:55 PM
10:09 AM - 11:39 AM

Action Rating: 2 out of 5

Saturday, July 18, 2026

Weather Forecast

Smoky haze
75.2°F
61.8°F
67.5°F
75%
0 in
8%
0%
12.3 mph
1.1


Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 57.62 μg/m3
PM10: 58.23 μg/m3
Carbon Monoxide: 630.04 μg/m3
Nitrogen Dioxide: 2.25 μg/m3
Sulphur Dioxide: 3.18 μg/m3
Ozone: 148.5 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 1:05 PM
Sunset: 8:51 PM
Daylight: 15 hrs 33 mins
Moonrise: 10:39 AM
Moon Transit: 4:53 PM
Moonset: 10:55 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

4:04 AM - 6:34 AM
4:23 PM - 6:53 PM

Minor Periods

10:25 PM - 11:55 PM
10:09 AM - 11:39 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Smoky haze
70.9°F
58°F
63.8°F
77%
0 in
11%
0%
6.7 mph
6.3


Air Quality

AQI: 4 - Unhealthy
PM2.5: 69.29 μg/m3
PM10: 71.17 μg/m3
Carbon Monoxide: 282.33 μg/m3
Nitrogen Dioxide: 2.65 μg/m3
Sulphur Dioxide: 1.93 μg/m3
Ozone: 119.54 μg/m3

Astronomical

Sunrise: 5:19 AM
Sun Transit: 1:05 PM
Sunset: 8:50 PM
Daylight: 15 hrs 31 mins
Moonrise: 11:52 AM
Moon Transit: 5:37 PM
Moonset: 11:10 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

4:48 AM - 7:18 AM
5:07 PM - 7:37 PM

Minor Periods

12:00 AM - 12:00 AM
11:22 AM - 12:52 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
86.3°F
63.4°F
72.8°F
67%
0.09 in
57%
0%
16.1 mph
5.5


Air Quality

AQI: 2 - Moderate
PM2.5: 16.93 μg/m3
PM10: 17.28 μg/m3
Carbon Monoxide: 311.13 μg/m3
Nitrogen Dioxide: 2.01 μg/m3
Sulphur Dioxide: 0.86 μg/m3
Ozone: 113.83 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 1:05 PM
Sunset: 8:49 PM
Daylight: 15 hrs 29 mins
Moonrise: 1:04 PM
Moon Transit: 6:21 PM
Moonset: 12:10 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

5:31 AM - 8:01 AM
5:51 PM - 8:21 PM

Minor Periods

12:34 AM - 2:04 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Tuesday, July 21, 2026

Weather Forecast

Smoky haze
63.2°F
52.2°F
56.1°F
72%
0.01 in
35%
0%
20.6 mph
5.9


Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 57.36 μg/m3
PM10: 58.75 μg/m3
Carbon Monoxide: 578.66 μg/m3
Nitrogen Dioxide: 18.03 μg/m3
Sulphur Dioxide: 3.45 μg/m3
Ozone: 101.71 μg/m3

Astronomical

Sunrise: 5:22 AM
Sun Transit: 1:05 PM
Sunset: 8:48 PM
Daylight: 15 hrs 27 mins
Moonrise: 2:16 PM
Moon Transit: 7:05 PM
Moonset: 12:26 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:15 AM - 8:45 AM
6:35 PM - 9:05 PM

Minor Periods

1:46 PM - 3:16 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, July 22, 2026

Weather Forecast

Smoky haze
69.2°F
52.4°F
61.1°F
51%
0 in
3%
0%
19.2 mph
6


Air Quality

AQI: 2 - Moderate
PM2.5: 39.68 μg/m3
PM10: 40.95 μg/m3
Carbon Monoxide: 680.25 μg/m3
Nitrogen Dioxide: 7.44 μg/m3
Sulphur Dioxide: 4.35 μg/m3
Ozone: 67.25 μg/m3

Astronomical

Sunrise: 5:23 AM
Sun Transit: 1:05 PM
Sunset: 8:47 PM
Daylight: 15 hrs 24 mins
Moonrise: 3:26 PM
Moon Transit: 7:51 PM
Moonset: 12:45 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

7:00 AM - 9:30 AM
7:21 PM - 9:51 PM

Minor Periods

2:56 PM - 4:26 PM
12:00 AM - 12:00 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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