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

Current Water Temperature

32.0°F

Measurement Time: Sunday, June 28, 2026, 11:36 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

71.8°F
Sunny
Sunny
59°F
76.3°F
60%
ENE 9.8 mph
16.4 mph
71.8°F
56.9°F
0 in
0%
6 mi
1013 mbar
2.8

Five Day Weather Forecast

Sunny
Sun
H: 73°F
L: 57°F
Patchy rain nearby
Mon
H: 64°F
L: 57°F
Fog
Tue
H: 82°F
L: 60°F
Sunny
Wed
H: 77°F
L: 60°F
Patchy rain nearby
Thu
H: 75°F
L: 60°F

Air Quality

AQI: 1 - Good
PM2.5: 4 μg/m3
PM10: 4.2 μg/m3
Carbon Monoxide: 95 μg/m3
Nitrogen Dioxide: 0.6 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 81 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:02 PM
Sunset: 9:02 PM
Daylight: 16 hrs mins
Moonrise: 8:43 PM
Moon Transit: 12:00 AM
Moonset: 3:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:32 AM - 2:02 PM

Minor Periods

8:13 PM - 9:43 PM
2:47 AM - 4:17 AM

Action Rating: 2 out of 5

Small Craft Advisory issued June 28 at 1:35AM CDT until June 28 at 10:00PM CDT by NWS Duluth MN

Effective: Sun June 28, 2026, 1:35 AM
Expires: Sun June 28, 2026, 1:45 PM

* WHAT...Northeast winds 10 to 15 kt with gusts up to 25 kt and waves 1 to 4 ft expected. * WHERE...Portions of Lake Superior. * WHEN...From 10 AM this morning to 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.


Small Craft Advisory issued June 28 at 5:54AM CDT until June 28 at 10:00PM CDT by NWS Duluth MN

Effective: Sun June 28, 2026, 5:54 AM
Expires: Sun June 28, 2026, 10:00 PM

* WHAT...Northeast winds 10 to 20 kt with gusts up to 25 kt and waves 1 to 5 ft expected. * WHERE...Portions of Lake Superior. * WHEN...From 10 AM this morning to 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.


Small Craft Advisory issued June 28 at 11:53AM CDT until June 28 at 10:00PM CDT by NWS Duluth MN

Effective: Sun June 28, 2026, 11:53 AM
Expires: Sun June 28, 2026, 10:00 PM

* WHAT...Northeast winds 10 to 15 kt with gusts up to 25 kt and waves 1 to 4 ft. * WHERE...Portions of Lake Superior. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.
Sunday, June 28, 2026

Weather Forecast

Sunny
73.4°F
56.8°F
64.7°F
62%
0 in
17%
0%
11.2 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 5.59 μg/m3
PM10: 5.91 μg/m3
Carbon Monoxide: 95.33 μg/m3
Nitrogen Dioxide: 1.19 μg/m3
Sulphur Dioxide: 0.53 μg/m3
Ozone: 70.79 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:02 PM
Sunset: 9:02 PM
Daylight: 16 hrs mins
Moonrise: 8:43 PM
Moon Transit: 12:00 AM
Moonset: 3:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:32 AM - 2:02 PM

Minor Periods

8:13 PM - 9:43 PM
2:47 AM - 4:17 AM

Action Rating: 2 out of 5

Monday, June 29, 2026

Weather Forecast

Patchy rain nearby
63.5°F
56.6°F
60.1°F
89%
0.02 in
55%
0%
10.5 mph
2.1


Air Quality

AQI: 1 - Good
PM2.5: 3.43 μg/m3
PM10: 3.63 μg/m3
Carbon Monoxide: 119.33 μg/m3
Nitrogen Dioxide: 1.47 μg/m3
Sulphur Dioxide: 0.57 μg/m3
Ozone: 89.33 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:02 PM
Sunset: 9:02 PM
Daylight: 16 hrs mins
Moonrise: 9:28 PM
Moon Transit: 12:25 AM
Moonset: 4:08 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:23 AM - 2:53 PM

Minor Periods

8:58 PM - 10:28 PM
3:38 AM - 5:08 AM

Action Rating: 5 out of 5

Tuesday, June 30, 2026

Weather Forecast

Fog
81.9°F
60.4°F
69.6°F
88%
0.09 in
79%
0%
11.2 mph
8.1


Air Quality

AQI: 1 - Good
PM2.5: 2.5 μg/m3
PM10: 2.8 μg/m3
Carbon Monoxide: 117 μg/m3
Nitrogen Dioxide: 1.1 μg/m3
Sulphur Dioxide: 0.35 μg/m3
Ozone: 89.38 μg/m3

Astronomical

Sunrise: 5:03 AM
Sun Transit: 1:02 PM
Sunset: 9:02 PM
Daylight: 15 hrs 59 mins
Moonrise: 10:03 PM
Moon Transit: 1:16 AM
Moonset: 5:09 AM
Moon Phase: Full
Moon Illumination: 98.6%

Best Times for Fishing or Hunting

Major Periods

12:46 AM - 3:16 AM
1:14 PM - 3:44 PM

Minor Periods

9:33 PM - 11:03 PM
4:39 AM - 6:09 AM

Action Rating: 4 out of 5

Wednesday, July 1, 2026

Weather Forecast

Sunny
76.6°F
60.3°F
65.9°F
81%
1.79 in
78%
0%
27.1 mph
8.4


Air Quality

AQI: 1 - Good
PM2.5: 2.78 μg/m3
PM10: 3.13 μg/m3
Carbon Monoxide: 114.28 μg/m3
Nitrogen Dioxide: 1.41 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 80.33 μg/m3

Astronomical

Sunrise: 5:04 AM
Sun Transit: 1:02 PM
Sunset: 9:02 PM
Daylight: 15 hrs 58 mins
Moonrise: 10:30 PM
Moon Transit: 2:06 AM
Moonset: 6:16 AM
Moon Phase: Full
Moon Illumination: 94.7%

Best Times for Fishing or Hunting

Major Periods

1:36 AM - 4:06 AM
2:02 PM - 4:32 PM

Minor Periods

10:00 PM - 11:30 PM
5:46 AM - 7:16 AM

Action Rating: 3 out of 5

Thursday, July 2, 2026

Weather Forecast

Patchy rain nearby
74.5°F
60.2°F
67.8°F
84%
0.04 in
62%
0%
8.9 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 4.45 μg/m3
PM10: 5.19 μg/m3
Carbon Monoxide: 168 μg/m3
Nitrogen Dioxide: 1 μg/m3
Sulphur Dioxide: 0.35 μg/m3
Ozone: 92.25 μg/m3

Astronomical

Sunrise: 5:04 AM
Sun Transit: 1:02 PM
Sunset: 9:01 PM
Daylight: 15 hrs 57 mins
Moonrise: 10:52 PM
Moon Transit: 2:53 AM
Moonset: 7:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.5%

Best Times for Fishing or Hunting

Major Periods

2:23 AM - 4:53 AM
2:49 PM - 5:19 PM

Minor Periods

10:22 PM - 11:52 PM
6:56 AM - 8:26 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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