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

Current Water Temperature

32.0°F

Measurement Time: Monday, June 8, 2026, 8:56 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

62.4°F
Fog
Fog
54°F
62.4°F
99%
SSW 2.2 mph
3.9 mph
62.4°F
62°F
0 in
100%
0 mi
1015 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Tue
H: 68°F
L: 55°F
Moderate rain
Wed
H: 61°F
L: 55°F
Patchy rain nearby
Thu
H: 68°F
L: 55°F
Patchy rain nearby
Fri
H: 60°F
L: 51°F
Patchy rain nearby
Sat
H: 49°F
L: 43°F

Air Quality

AQI: 1 - Good
PM2.5: 6 μg/m3
PM10: 6.4 μg/m3
Carbon Monoxide: 124 μg/m3
Nitrogen Dioxide: 3.3 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 64 μg/m3

Astronomical

Sunrise: 5:00 AM
Sun Transit: 12:58 AM
Sunset: 8:57 PM
Daylight: 15 hrs 57 mins
Moonrise: 1:34 AM
Moon Transit: 5:27 AM
Moonset: 2:25 PM
Moon Phase: Last Quarter
Moon Illumination: 21.6%

Best Times for Fishing or Hunting

Major Periods

4:57 AM - 7:27 AM
4:57 AM - 7:27 AM

Minor Periods

1:55 PM - 3:25 PM
1:04 AM - 2:34 AM

Action Rating: 4 out of 5

Dense Fog Advisory issued June 8 at 2:13PM CDT until June 9 at 10:00AM CDT by NWS Duluth MN

Effective: Mon June 8, 2026, 2:13 PM
Expires: Tue June 9, 2026, 2:15 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Carlton, South and Central St. Louis, Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, and Douglas Counties. This includes the Tribal Lands of the Bad River Reservation, the Bois Forte Band, Lake Vermilion area, the Grand Portage Reservation, the Fond du Lac Band and the Red Cliff Band. Other locations including Madeline Island and the Apostle Islands National Lakeshore. This also includes the Boundary Waters eastern and central area. * WHEN...From 8 PM this evening to 10 AM CDT Tuesday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued June 9 at 1:15AM CDT until June 9 at 10:00AM CDT by NWS Duluth MN

Effective: Tue June 9, 2026, 1:15 AM
Expires: Tue June 9, 2026, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Carlton, South and Central St. Louis, Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, and Douglas Counties. This includes the Tribal Lands of the Red Cliff Band, the Fond du Lac Band, the Grand Portage Reservation, the Bad River Reservation and the Bois Forte Band, Lake Vermilion area. Other locations including the Apostle Islands National Lakeshore and Madeline Island. This also includes the Boundary Waters eastern and central area. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.
Tuesday, June 9, 2026

Weather Forecast

Patchy rain nearby
67.6°F
55.3°F
62.3°F
91%
0.01 in
73%
0%
6 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 4.12 μg/m3
PM10: 4.32 μg/m3
Carbon Monoxide: 125.5 μg/m3
Nitrogen Dioxide: 2.93 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 65.46 μg/m3

Astronomical

Sunrise: 5:00 AM
Sun Transit: 12:58 AM
Sunset: 8:57 PM
Daylight: 15 hrs 57 mins
Moonrise: 1:34 AM
Moon Transit: 5:27 AM
Moonset: 2:25 PM
Moon Phase: Last Quarter
Moon Illumination: 21.6%

Best Times for Fishing or Hunting

Major Periods

4:57 AM - 7:27 AM
4:57 AM - 7:27 AM

Minor Periods

1:55 PM - 3:25 PM
1:04 AM - 2:34 AM

Action Rating: 4 out of 5

Wednesday, June 10, 2026

Weather Forecast

Moderate rain
61.3°F
54.6°F
57.4°F
98%
0.53 in
99%
0%
13.2 mph
3.4


Air Quality

AQI: 1 - Good
PM2.5: 1.21 μg/m3
PM10: 1.35 μg/m3
Carbon Monoxide: 128.04 μg/m3
Nitrogen Dioxide: 2.09 μg/m3
Sulphur Dioxide: 0.45 μg/m3
Ozone: 72.79 μg/m3

Astronomical

Sunrise: 5:00 AM
Sun Transit: 12:58 AM
Sunset: 8:57 PM
Daylight: 15 hrs 58 mins
Moonrise: 1:51 AM
Moon Transit: 8:38 AM
Moonset: 3:44 PM
Moon Phase: Waning Crescent
Moon Illumination: 13.1%

Best Times for Fishing or Hunting

Major Periods

8:08 AM - 10:38 AM
8:35 PM - 11:05 PM

Minor Periods

3:14 PM - 4:44 PM
1:21 AM - 2:51 AM

Action Rating: 3 out of 5

Thursday, June 11, 2026

Weather Forecast

Patchy rain nearby
68.3°F
55.1°F
60°F
83%
0.01 in
73%
0%
13 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 1.95 μg/m3
PM10: 2.4 μg/m3
Carbon Monoxide: 109.58 μg/m3
Nitrogen Dioxide: 0.89 μg/m3
Sulphur Dioxide: 0.26 μg/m3
Ozone: 75.17 μg/m3

Astronomical

Sunrise: 4:59 AM
Sun Transit: 12:58 AM
Sunset: 8:58 PM
Daylight: 15 hrs 59 mins
Moonrise: 2:10 AM
Moon Transit: 9:29 AM
Moonset: 5:08 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.5%

Best Times for Fishing or Hunting

Major Periods

8:59 AM - 11:29 AM
9:28 PM - 11:58 PM

Minor Periods

4:38 PM - 6:08 PM
1:40 AM - 3:10 AM

Action Rating: 3 out of 5

Friday, June 12, 2026

Weather Forecast

Patchy rain nearby
60°F
50.7°F
55.3°F
81%
0.1 in
73%
0%
13.6 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 0.86 μg/m3
PM10: 0.9 μg/m3
Carbon Monoxide: 110.77 μg/m3
Nitrogen Dioxide: 0.76 μg/m3
Sulphur Dioxide: 0.19 μg/m3
Ozone: 63.63 μg/m3

Astronomical

Sunrise: 4:59 AM
Sun Transit: 12:58 AM
Sunset: 8:59 PM
Daylight: 15 hrs 59 mins
Moonrise: 2:34 AM
Moon Transit: 10:24 AM
Moonset: 6:36 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:54 AM - 12:24 AM

Minor Periods

6:06 PM - 7:36 PM
2:04 AM - 3:34 AM

Action Rating: 2 out of 5

Saturday, June 13, 2026

Weather Forecast

Patchy rain nearby
48.7°F
43.2°F
47.1°F
79%
0.03 in
73%
0%
15 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 1.15 μg/m3
PM10: 1.15 μg/m3
Carbon Monoxide: 131.5 μg/m3
Nitrogen Dioxide: 0.61 μg/m3
Sulphur Dioxide: 0.13 μg/m3
Ozone: 55.63 μg/m3

Astronomical

Sunrise: 4:59 AM
Sun Transit: 12:58 AM
Sunset: 8:59 PM
Daylight: 16 hrs mins
Moonrise: 3:06 AM
Moon Transit: 11:26 AM
Moonset: 8:02 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:56 AM - 1:26 PM

Minor Periods

7:32 PM - 9:02 PM
2:36 AM - 4:06 AM

Action Rating: 3 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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