Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

41.0°F

Measurement Time: Thursday, January 15, 2026, 6:20 AM CST

Temperature Locations

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Lake Superior

Station Name: Grand Marais
Data Source: USGS

Elevation Above Sea Level: 607 feet

Nearest Address:
2nd Street
Grand Marais, MN 55604
Cook County

GPS Coordinates: 47.7517, -90.3283

Nearby Water Temperatures

Grand Marais Harbor, Grand Marais, MN (0.6 mi)
Poplar River, Lutsen, MN (19.4 mi)
Grand Portage River, Grand Portage, MN (33.3 mi)
Lake Superior, Lake Superior, MI (38.1 mi)
Baptism River, Illgen City, MN (49.7 mi)
Washington Creek, Windigo, MI (56.1 mi)
Kawishiwi River, Ely, MN (57.2 mi)
Dunka River, Babbitt, MN (71.4 mi)
Dunka River, Babbitt, MN (71.7 mi)
Partrige River, Babbitt, MN (74.9 mi)
Lake Superior, Two Harbors, MN (80.5 mi)
Chequamegon Bay, Ashland, WI (81.7 mi)
Saint Louis River, Hoyt Lakes, MN (81.9 mi)
Lake Superior, Calumet, MI (86.9 mi)
Presque Isle River, Tula, MI (87.2 mi)

Weather for Grand Marais, Minnesota

Current Weather

21°F
Overcast
Overcast
17°F
20.3°F
68%
N 2.9 mph
4.6 mph
11.6°F
15.1°F
0 in
0%
6 mi
994 mbar
0.2

Five Day Weather Forecast

Overcast
Fri
H: 30°F
L: 17°F
Partly Cloudy
Sat
H: 11°F
L: 5°F
Light freezing rain
Sun
H: 10°F
L: -7°F
Cloudy
Mon
H: -3°F
L: -12°F
Partly Cloudy
Tue
H: -5°F
L: -16°F

Air Quality

PM2.5: 0.68 μg/m3
PM10: 0.68 μg/m3
Carbon Monoxide: 148.68 μg/m3
Nitrogen Dioxide: 0.98 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 81 μg/m3

Astronomical

Sunrise: 7:44 AM
Sun Transit: 12:11 AM
Sunset: 4:38 PM
Daylight: 8 hrs 54 mins
Moonrise: 6:46 AM
Moon Transit: 10:27 AM
Moonset: 2:11 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

1:41 PM - 3:11 PM
6:16 AM - 7:46 AM

Action Rating: 3 out of 5

yellow warning - snowfall - 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: Thu January 15, 2026, 2:59 PM
Expires: Fri January 16, 2026, 6:59 AM

Lake enhanced snowfall expected tonight. What: Reduced visibility at times in heavy snow. Local snowfall amounts of 10 to 15 cm. When: This evening through Friday morning. Where: Affecting areas along the north shore of Lake Superior between Thunder Bay and Marathon. ### Travel will likely be challenging. Road closures are possible. 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.

Prepare for quickly changing and deteriorating travel conditions.


yellow warning - snowfall - 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: Thu January 15, 2026, 10:50 PM
Expires: Fri January 16, 2026, 1:03 PM

Lake enhanced snowfall expected tonight. What: Reduced visibility at times in heavy snow. Local snowfall amounts of 10 to 15 cm. When: This evening through Friday morning. Where: Affecting areas along the north shore of Lake Superior between Thunder Bay and Marathon. ### Travel will likely be challenging. Road closures are possible. 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.

Prepare for quickly changing and deteriorating travel conditions.


yellow warning - snowfall - 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: Fri January 16, 2026, 3:49 AM
Expires: Fri January 16, 2026, 5:03 PM

Lake enhanced snowfall continues today. What: Reduced visibility at times in heavy snow. Additional local snowfall amounts of 5 to 10 cm. When: Continuing into this afternoon. Where: Affecting areas along the north shore of Lake Superior between Thunder Bay and Marathon. ### Travel will likely be challenging. Visibility will likely be reduced at times. Road closures are possible. 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.

Prepare for quickly changing and deteriorating travel conditions.


Friday, January 16, 2026

Weather Forecast

Overcast
30.4°F
17.2°F
22.3°F
78%
0 in
0%
0%
17.7 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 1.21 μg/m3
PM10: 1.25 μg/m3
Carbon Monoxide: 154.08 μg/m3
Nitrogen Dioxide: 2.67 μg/m3
Sulphur Dioxide: 0.99 μg/m3
Ozone: 71.88 μg/m3

Astronomical

Sunrise: 7:44 AM
Sun Transit: 12:11 AM
Sunset: 4:38 PM
Daylight: 8 hrs 54 mins
Moonrise: 6:46 AM
Moon Transit: 10:27 AM
Moonset: 2:11 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

1:41 PM - 3:11 PM
6:16 AM - 7:46 AM

Action Rating: 3 out of 5

Saturday, January 17, 2026

Weather Forecast

Partly Cloudy
10.8°F
4.6°F
9.5°F
69%
0 in
0%
6%
20.6 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 0.78 μg/m3
PM10: 0.86 μg/m3
Carbon Monoxide: 142.15 μg/m3
Nitrogen Dioxide: 0.86 μg/m3
Sulphur Dioxide: 0.75 μg/m3
Ozone: 65.88 μg/m3

Astronomical

Sunrise: 7:44 AM
Sun Transit: 12:11 AM
Sunset: 4:40 PM
Daylight: 8 hrs 56 mins
Moonrise: 7:30 AM
Moon Transit: 11:20 AM
Moonset: 3:14 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:50 AM - 1:20 PM

Minor Periods

2:44 PM - 4:14 PM
7:00 AM - 8:30 AM

Action Rating: 4 out of 5

Sunday, January 18, 2026

Weather Forecast

Light freezing rain
9.5°F
-6.9°F
1.4°F
85%
0.01 in
73%
49%
13.6 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 0.92 μg/m3
PM10: 0.99 μg/m3
Carbon Monoxide: 152.25 μg/m3
Nitrogen Dioxide: 1.04 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 65.85 μg/m3

Astronomical

Sunrise: 7:43 AM
Sun Transit: 12:11 AM
Sunset: 4:41 PM
Daylight: 8 hrs 58 mins
Moonrise: 8:05 AM
Moon Transit: 12:11 AM
Moonset: 4:26 PM
Moon Phase: New
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:41 AM - 2:11 PM

Minor Periods

3:56 PM - 5:26 PM
7:35 AM - 9:05 AM

Action Rating: 4 out of 5

Monday, January 19, 2026

Weather Forecast

Cloudy
-3.4°F
-12.4°F
-6.7°F
88%
0 in
0%
25%
15.2 mph
0


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:42 AM
Sun Transit: 12:12 AM
Sunset: 4:43 PM
Daylight: 9 hrs 1 mins
Moonrise: 8:32 AM
Moon Transit: 1:00 PM
Moonset: 5:40 PM
Moon Phase: New
Moon Illumination: 0.4%

Best Times for Fishing or Hunting

Major Periods

12:03 AM - 2:33 AM
12:30 AM - 3:00 PM

Minor Periods

5:10 PM - 6:40 PM
8:02 AM - 9:32 AM

Action Rating: 5 out of 5

Tuesday, January 20, 2026

Weather Forecast

Partly Cloudy
-5.4°F
-16°F
-10.6°F
88%
0 in
0%
11%
12.3 mph
2


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:41 AM
Sun Transit: 12:12 AM
Sunset: 4:44 PM
Daylight: 9 hrs 3 mins
Moonrise: 8:53 AM
Moon Transit: 1:47 PM
Moonset: 6:55 PM
Moon Phase: New
Moon Illumination: 3.1%

Best Times for Fishing or Hunting

Major Periods

12:51 AM - 3:21 AM
1:17 PM - 3:47 PM

Minor Periods

6:25 PM - 7:55 PM
8:23 AM - 9:53 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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