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

Current Water Temperature

32.0°F

Measurement Time: Wednesday, July 8, 2026, 8:01 PM 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

66.4°F
Clear
Clear
57.4°F
66.4°F
63%
WNW 3.4 mph
7 mph
66.4°F
53.2°F
0 in
0%
6 mi
1012 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 74°F
L: 60°F
Sunny
Fri
H: 68°F
L: 58°F
Sunny
Sat
H: 69°F
L: 55°F
Patchy rain nearby
Sun
H: 78°F
L: 57°F
Sunny
Mon
H: 86°F
L: 70°F

Air Quality

AQI: 1 - Good
PM2.5: 10.5 μg/m3
PM10: 14.7 μg/m3
Carbon Monoxide: 121 μg/m3
Nitrogen Dioxide: 1.7 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 84 μg/m3

Astronomical

Sunrise: 5:09 AM
Sun Transit: 1:04 PM
Sunset: 8:58 PM
Daylight: 15 hrs 49 mins
Moonrise: 12:34 AM
Moon Transit: 8:11 AM
Moonset: 4:09 PM
Moon Phase: Last Quarter
Moon Illumination: 17.4%

Best Times for Fishing or Hunting

Major Periods

7:41 AM - 10:11 AM
8:12 PM - 10:42 PM

Minor Periods

3:39 PM - 5:09 PM
12:04 AM - 1:34 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued July 8 at 3:12PM EDT until July 9 at 8:00AM EDT by NWS Marquette MI

Effective: Wed July 8, 2026, 2:12 PM
Expires: Thu July 9, 2026, 2:15 AM

* WHAT...Dense fog will reduce visibility to less than one nautical mile. * WHERE...Portions of Central, Eastern and Western Lake Superior. * WHEN...Until 8 AM EDT /7 AM CDT/ Thursday. * IMPACTS...Low visibility will make navigation difficult.

If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.


Dense Fog Advisory issued July 8 at 10:24PM EDT until July 9 at 8:00AM EDT by NWS Marquette MI

Effective: Wed July 8, 2026, 9:24 PM
Expires: Thu July 9, 2026, 7:00 AM

* WHAT...Dense fog will reduce visibility to less than one nautical mile. * WHERE...Portions of Central, Eastern and Western Lake Superior. * WHEN...Until 8 AM EDT /7 AM CDT/ Thursday. * IMPACTS...Low visibility will make navigation difficult.

If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.
Thursday, July 9, 2026

Weather Forecast

Sunny
73.8°F
60.3°F
65.4°F
66%
0 in
6%
0%
6 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 7.4 μg/m3
PM10: 9.88 μg/m3
Carbon Monoxide: 119.67 μg/m3
Nitrogen Dioxide: 1.39 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 81.83 μg/m3

Astronomical

Sunrise: 5:09 AM
Sun Transit: 1:04 PM
Sunset: 8:58 PM
Daylight: 15 hrs 49 mins
Moonrise: 12:34 AM
Moon Transit: 8:11 AM
Moonset: 4:09 PM
Moon Phase: Last Quarter
Moon Illumination: 17.4%

Best Times for Fishing or Hunting

Major Periods

7:41 AM - 10:11 AM
8:12 PM - 10:42 PM

Minor Periods

3:39 PM - 5:09 PM
12:04 AM - 1:34 AM

Action Rating: 2 out of 5

Friday, July 10, 2026

Weather Forecast

Sunny
68.2°F
57.8°F
63.3°F
60%
0 in
17%
0%
5.6 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 4.11 μg/m3
PM10: 4.97 μg/m3
Carbon Monoxide: 120.96 μg/m3
Nitrogen Dioxide: 1.21 μg/m3
Sulphur Dioxide: 0.38 μg/m3
Ozone: 84.25 μg/m3

Astronomical

Sunrise: 5:10 AM
Sun Transit: 1:04 PM
Sunset: 8:58 PM
Daylight: 15 hrs 47 mins
Moonrise: 1:01 AM
Moon Transit: 9:08 AM
Moonset: 5:34 PM
Moon Phase: Waning Crescent
Moon Illumination: 9.7%

Best Times for Fishing or Hunting

Major Periods

8:38 AM - 11:08 AM
9:12 PM - 11:42 PM

Minor Periods

5:04 PM - 6:34 PM
12:31 AM - 2:01 AM

Action Rating: 3 out of 5

Saturday, July 11, 2026

Weather Forecast

Sunny
68.5°F
55.2°F
61.8°F
75%
0 in
10%
0%
6.3 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 3.2 μg/m3
PM10: 3.57 μg/m3
Carbon Monoxide: 126.92 μg/m3
Nitrogen Dioxide: 2.11 μg/m3
Sulphur Dioxide: 0.48 μg/m3
Ozone: 81.83 μg/m3

Astronomical

Sunrise: 5:11 AM
Sun Transit: 1:04 PM
Sunset: 8:57 PM
Daylight: 15 hrs 46 mins
Moonrise: 1:38 AM
Moon Transit: 10:11 AM
Moonset: 6:55 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:41 AM - 12:11 AM

Minor Periods

6:25 PM - 7:55 PM
1:08 AM - 2:38 AM

Action Rating: 2 out of 5

Sunday, July 12, 2026

Weather Forecast

Patchy rain nearby
78.2°F
57.1°F
67°F
81%
0.01 in
25%
0%
10.1 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 3.74 μg/m3
PM10: 3.96 μg/m3
Carbon Monoxide: 126.14 μg/m3
Nitrogen Dioxide: 1.04 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 84.75 μg/m3

Astronomical

Sunrise: 5:12 AM
Sun Transit: 1:04 PM
Sunset: 8:56 PM
Daylight: 15 hrs 44 mins
Moonrise: 2:32 AM
Moon Transit: 11:17 AM
Moonset: 8:04 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:47 AM - 1:17 PM

Minor Periods

7:34 PM - 9:04 PM
2:02 AM - 3:32 AM

Action Rating: 3 out of 5

Monday, July 13, 2026

Weather Forecast

Sunny
85.6°F
70.3°F
78.7°F
64%
0 in
8%
0%
17.7 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 4.78 μg/m3
PM10: 4.96 μg/m3
Carbon Monoxide: 164.38 μg/m3
Nitrogen Dioxide: 0.78 μg/m3
Sulphur Dioxide: 0.48 μg/m3
Ozone: 84.13 μg/m3

Astronomical

Sunrise: 5:13 AM
Sun Transit: 1:04 PM
Sunset: 8:55 PM
Daylight: 15 hrs 42 mins
Moonrise: 3:42 AM
Moon Transit: 12:24 AM
Moonset: 8:56 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:54 AM - 2:24 PM

Minor Periods

8:26 PM - 9:56 PM
3:12 AM - 4:42 AM

Action Rating: 4 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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