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

Current Water Temperature

32.4°F

Measurement Time: Tuesday, December 16, 2025, 5:15 AM CST

Temperature Locations

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Local Points of Interest

Grand Portage Bay; Lake Superior

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Grand Portage River

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

Elevation Above Sea Level: 623 feet / 190 meters

Nearest Address:
1 Upper Rd
Grand Portage, MN 55605
Cook County

GPS Coordinates: 47.9634982, -89.6834233

Nearby Water Temperatures

Washington Creek, Windigo, MI (25.0 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 (98.0 mi)
Sturgeon River, Pelkie, MI (98.0 mi)
Falls River, L'Anse, MI (102.8 mi)

Weather for Grand Portage, Minnesota

Current Weather

30.2°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 80%
Feels Like: 17.7°F
Wind: SW 19.5 mph
Wind Gusts: 29.3 mph
Pressure: 29.29 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0.8

Five Day Weather Forecast

Light freezing rain
Tue
H: 40°F
L: 7°F
Overcast
Wed
H: 30°F
L: 12°F
Moderate or heavy snow showers
Thu
H: 26°F
L: -7°F
Moderate snow
Fri
H: 4°F
L: -10°F
Heavy snow
Sat
H: 26°F
L: 10°F

Air Quality

AQI: 1 - Good
PM2.5: 2.85 μg/m3
PM10: 2.95 μg/m3
Carbon Monoxide: 145.85 μg/m3
Nitrogen Dioxide: 4.05 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 79 μg/m3

Astronomical

Sunrise: 7:43 AM
Sun Transit: 11:54 AM
Sunset: 4:06 PM
Daylight: 8 hrs 24 mins
Moonrise: 4:43 AM
Moon Transit: 9:10 AM
Moonset: 1:31 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.5%

Best Times for Fishing or Hunting

Major Periods

8:40 AM - 11:10 AM
9:06 PM - 11:36 PM

Minor Periods

1:01 PM - 2:31 PM
4:13 AM - 5:43 AM

Action Rating: 2 out of 5

special weather statement ended

Service Notice – November 2025: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2025, changes are expected to include... 1) ECCC's initiative to upgrade the presentation of alerts into Colour-Coded Weather Alerts is tentatively set for deployment November 26, 2025. Data changes will appear in CAP following this deployment, 2) the alert name ‘extreme cold warning’ will change to ‘cold warning’, 3) two Public zone names will change in Saskatchewan, 4) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard continues, there will be changes coming to CAP and 5) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – novembre 2025: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2025, il y aura des changements incluant... 1) l'initiative d'ECCC visant à améliorer la présentation des alertes sous forme d'alertes météorologiques codées par couleur est provisoirement prévue pour un déploiement le 26 novembre 2025. Des changements aux données apparaîtront dans le PAC suite à ce déploiement, 2) le nom de l’alerte ‘avertissement de froid extrême’ changera pour ‘avertissement de froid’, 3) deux noms de zones publiques seront modifiés en Saskatchewan, 4) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique se poursuit. Des changements seront également apportés au PAC et 5) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Tue December 16, 2025, 8:10 AM
Expires: Tue December 16, 2025, 9:10 AM

###


special weather statement in effect

Service Notice – November 2025: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2025, changes are expected to include... 1) ECCC's initiative to upgrade the presentation of alerts into Colour-Coded Weather Alerts is tentatively set for deployment November 26, 2025. Data changes will appear in CAP following this deployment, 2) the alert name ‘extreme cold warning’ will change to ‘cold warning’, 3) two Public zone names will change in Saskatchewan, 4) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard continues, there will be changes coming to CAP and 5) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – novembre 2025: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2025, il y aura des changements incluant... 1) l'initiative d'ECCC visant à améliorer la présentation des alertes sous forme d'alertes météorologiques codées par couleur est provisoirement prévue pour un déploiement le 26 novembre 2025. Des changements aux données apparaîtront dans le PAC suite à ce déploiement, 2) le nom de l’alerte ‘avertissement de froid extrême’ changera pour ‘avertissement de froid’, 3) deux noms de zones publiques seront modifiés en Saskatchewan, 4) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique se poursuit. Des changements seront également apportés au PAC et 5) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Tue December 16, 2025, 7:05 AM
Expires: Tue December 16, 2025, 11:10 AM

Icy conditions are possible this morning. Hazard: Patchy ice pellets or freezing drizzle. Light ice accretion leading to hazardous travel conditions. When: This morning. Additional information: An Alberta clipper is bringing ice pellets or freezing drizzle to portions of northwestern Ontario this morning. This may lead to minor ice build up which could lead to hazardous travel conditions. Roads, walkways, and other surfaces will likely become icy and slippery. Be very careful if walking or driving. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.


Tuesday, December 16, 2025

Weather Forecast

Conditions: Light freezing rain
Average Temperature: 27.6°F
Average Humidity: 84%
Chance of Rain: 74%
Wind: 19.5 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 5.75 μg/m3
PM10: 5.95 μg/m3
Carbon Monoxide: 189.29 μg/m3
Nitrogen Dioxide: 4.41 μg/m3
Sulphur Dioxide: 1.67 μg/m3
Ozone: 70.12 μg/m3

Astronomical

Sunrise: 7:43 AM
Sun Transit: 11:54 AM
Sunset: 4:06 PM
Daylight: 8 hrs 24 mins
Moonrise: 4:43 AM
Moon Transit: 9:10 AM
Moonset: 1:31 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.5%

Best Times for Fishing or Hunting

Major Periods

8:40 AM - 11:10 AM
9:06 PM - 11:36 PM

Minor Periods

1:01 PM - 2:31 PM
4:13 AM - 5:43 AM

Action Rating: 2 out of 5

Wednesday, December 17, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 21.8°F
Average Humidity: 74%
Chance of Rain: 0%
Wind: 19.7 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 1.37 μg/m3
PM10: 1.46 μg/m3
Carbon Monoxide: 150.41 μg/m3
Nitrogen Dioxide: 1.65 μg/m3
Sulphur Dioxide: 1.31 μg/m3
Ozone: 74.36 μg/m3

Astronomical

Sunrise: 7:43 AM
Sun Transit: 11:55 AM
Sunset: 4:07 PM
Daylight: 8 hrs 23 mins
Moonrise: 5:51 AM
Moon Transit: 9:57 AM
Moonset: 1:58 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:27 AM - 11:57 AM

Minor Periods

1:28 PM - 2:58 PM
5:21 AM - 6:51 AM

Action Rating: 2 out of 5

Thursday, December 18, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 15.8°F
Average Humidity: 76%
Chance of Rain: 61%
Wind: 25.5 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 3.01 μg/m3
PM10: 3.58 μg/m3
Carbon Monoxide: 155.05 μg/m3
Nitrogen Dioxide: 2.57 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 79.08 μg/m3

Astronomical

Sunrise: 7:44 AM
Sun Transit: 11:55 AM
Sunset: 4:07 PM
Daylight: 8 hrs 23 mins
Moonrise: 6:58 AM
Moon Transit: 10:47 AM
Moonset: 2:34 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

2:04 PM - 3:34 PM
6:28 AM - 7:58 AM

Action Rating: 3 out of 5

Friday, December 19, 2025

Weather Forecast

Conditions: Moderate snow
Average Temperature: -0.8°F
Average Humidity: 80%
Chance of Rain: 61%
Wind: 17.4 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 1.3 μg/m3
PM10: 1.38 μg/m3
Carbon Monoxide: 141.8 μg/m3
Nitrogen Dioxide: 1.46 μg/m3
Sulphur Dioxide: 1.53 μg/m3
Ozone: 77.2 μg/m3

Astronomical

Sunrise: 7:45 AM
Sun Transit: 11:56 AM
Sunset: 4:07 PM
Daylight: 8 hrs 23 mins
Moonrise: 7:58 AM
Moon Transit: 11:39 AM
Moonset: 3:19 PM
Moon Phase: New
Moon Illumination: 1.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:09 AM - 1:39 PM

Minor Periods

2:49 PM - 4:19 PM
7:28 AM - 8:58 AM

Action Rating: 5 out of 5

Saturday, December 20, 2025

Weather Forecast

Conditions: Heavy snow
Average Temperature: 19.6°F
Average Humidity: 89%
Chance of Rain: 60%
Wind: 16.6 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 2.43 μg/m3
PM10: 2.67 μg/m3
Carbon Monoxide: 154.58 μg/m3
Nitrogen Dioxide: 2.5 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 78.46 μg/m3

Astronomical

Sunrise: 7:45 AM
Sun Transit: 11:56 AM
Sunset: 4:08 PM
Daylight: 8 hrs 23 mins
Moonrise: 8:49 AM
Moon Transit: 12:31 AM
Moonset: 4:17 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:01 AM - 2:31 PM

Minor Periods

3:47 PM - 5:17 PM
8:19 AM - 9:49 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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