Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

40.0°F

Measurement Time: Thursday, June 4, 2026, 5:00 AM CDT

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

46.9°F
Patchy rain nearby
Patchy rain nearby
47°F
61.4°F
93%
E 2.2 mph
3.3 mph
61.3°F
54.2°F
0 in
0%
0 mi
1009 mbar
0

Five Day Weather Forecast

Moderate rain
Fri
H: 62°F
L: 49°F
Patchy rain nearby
Sat
H: 65°F
L: 50°F
Partly Cloudy
Sun
H: 59°F
L: 46°F
Moderate rain
Mon
H: 63°F
L: 49°F
Patchy rain nearby
Tue
H: 57°F
L: 51°F

Air Quality

PM2.5: 2.9 μg/m3
PM10: 3.1 μg/m3
Carbon Monoxide: 127 μg/m3
Nitrogen Dioxide: 1.8 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 5:05 AM
Sun Transit: 1:00 PM
Sunset: 8:56 PM
Daylight: 15 hrs 51 mins
Moonrise: 12:28 AM
Moon Transit: 4:58 AM
Moonset: 9:38 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.0%

Best Times for Fishing or Hunting

Major Periods

4:28 AM - 6:58 AM
4:48 PM - 7:18 PM

Minor Periods

9:08 AM - 10:38 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

squall watch in effect

Service Notice – April 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For Spring 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for June 2026 deployment. Data changes will appear in CAP following this deployment, 2) marine alerts will now be issued for smaller zone splits in certain areas of Atlantic and Pacific waters and 3) 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 – avril 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour le printemps 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement en juin 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement, 2) les alertes marines seront désormais émises pour des subdivisions de zones plus petites dans certaines régions des eaux de l’Atlantique et du Pacifique et 3) 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 June 4, 2026, 5:05 PM
Expires: Fri June 5, 2026, 12:59 AM

Conditions are favourable for the development of squalls with wind gusts up to 45 knots. Thunderstorms are expected to track eastward into the area this evening. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway. Consider delaying or postponing travel in areas under the Squall Watch.


squall watch in effect

Service Notice – April 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For Spring 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for June 2026 deployment. Data changes will appear in CAP following this deployment, 2) marine alerts will now be issued for smaller zone splits in certain areas of Atlantic and Pacific waters and 3) 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 – avril 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour le printemps 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement en juin 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement, 2) les alertes marines seront désormais émises pour des subdivisions de zones plus petites dans certaines régions des eaux de l’Atlantique et du Pacifique et 3) 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 June 4, 2026, 5:05 PM
Expires: Fri June 5, 2026, 12:59 AM

Conditions are favourable for the development of squalls with wind gusts up to 45 knots. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway. Consider delaying or postponing travel in areas under the Squall Watch.


squall watch in effect

Service Notice – April 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For Spring 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for June 2026 deployment. Data changes will appear in CAP following this deployment, 2) marine alerts will now be issued for smaller zone splits in certain areas of Atlantic and Pacific waters and 3) 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 – avril 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour le printemps 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement en juin 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement, 2) les alertes marines seront désormais émises pour des subdivisions de zones plus petites dans certaines régions des eaux de l’Atlantique et du Pacifique et 3) 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 June 4, 2026, 3:23 PM
Expires: Fri June 5, 2026, 1:00 AM

Conditions are favourable for the development of squalls with wind gusts up to 50 knots, frequent lightning and hail. Thunderstorms are expected to track eastward into the area late this afternoon or this evening. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.


squall watch ended

Service Notice – April 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For Spring 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for June 2026 deployment. Data changes will appear in CAP following this deployment, 2) marine alerts will now be issued for smaller zone splits in certain areas of Atlantic and Pacific waters and 3) 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 – avril 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour le printemps 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement en juin 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement, 2) les alertes marines seront désormais émises pour des subdivisions de zones plus petites dans certaines régions des eaux de l’Atlantique et du Pacifique et 3) 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 June 4, 2026, 8:50 PM
Expires: Thu June 4, 2026, 9:50 PM

Squalls are no longer expected over the area. ###


Friday, June 5, 2026

Weather Forecast

Moderate rain
62.4°F
48.6°F
58.2°F
82%
0.23 in
85%
0%
6.9 mph
6.5


Air Quality

AQI: 1 - Good
PM2.5: 3.65 μg/m3
PM10: 3.93 μg/m3
Carbon Monoxide: 118.88 μg/m3
Nitrogen Dioxide: 1.5 μg/m3
Sulphur Dioxide: 0.23 μg/m3
Ozone: 77.96 μg/m3

Astronomical

Sunrise: 5:05 AM
Sun Transit: 1:00 PM
Sunset: 8:56 PM
Daylight: 15 hrs 51 mins
Moonrise: 12:28 AM
Moon Transit: 4:58 AM
Moonset: 9:38 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.0%

Best Times for Fishing or Hunting

Major Periods

4:28 AM - 6:58 AM
4:48 PM - 7:18 PM

Minor Periods

9:08 AM - 10:38 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, June 6, 2026

Weather Forecast

Patchy rain nearby
64.6°F
49.7°F
55.6°F
78%
0 in
73%
0%
8.9 mph
4.4


Air Quality

AQI: 1 - Good
PM2.5: 1.34 μg/m3
PM10: 1.39 μg/m3
Carbon Monoxide: 114.17 μg/m3
Nitrogen Dioxide: 1.31 μg/m3
Sulphur Dioxide: 0.24 μg/m3
Ozone: 63.75 μg/m3

Astronomical

Sunrise: 5:04 AM
Sun Transit: 1:00 PM
Sunset: 8:56 PM
Daylight: 15 hrs 52 mins
Moonrise: 12:48 AM
Moon Transit: 5:43 AM
Moonset: 10:50 AM
Moon Phase: Last Quarter
Moon Illumination: 53.9%

Best Times for Fishing or Hunting

Major Periods

5:13 AM - 7:43 AM
5:32 PM - 8:02 PM

Minor Periods

10:20 AM - 11:50 AM
12:18 AM - 1:48 AM

Action Rating: 3 out of 5

Sunday, June 7, 2026

Weather Forecast

Partly Cloudy
59.4°F
46°F
53.6°F
81%
0 in
73%
0%
15 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 1.29 μg/m3
PM10: 1.34 μg/m3
Carbon Monoxide: 114.63 μg/m3
Nitrogen Dioxide: 0.57 μg/m3
Sulphur Dioxide: 0.13 μg/m3
Ozone: 70.58 μg/m3

Astronomical

Sunrise: 5:04 AM
Sun Transit: 1:00 PM
Sunset: 8:57 PM
Daylight: 15 hrs 53 mins
Moonrise: 1:05 AM
Moon Transit: 6:27 AM
Moonset: 12:01 AM
Moon Phase: Last Quarter
Moon Illumination: 42.6%

Best Times for Fishing or Hunting

Major Periods

5:57 AM - 8:27 AM
6:15 PM - 8:45 PM

Minor Periods

11:31 AM - 1:01 PM
12:35 AM - 2:05 AM

Action Rating: 3 out of 5

Monday, June 8, 2026

Weather Forecast

Moderate rain
63.4°F
49.1°F
54.6°F
78%
0.24 in
77%
0%
12.8 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 2 μg/m3
PM10: 2.14 μg/m3
Carbon Monoxide: 146.5 μg/m3
Nitrogen Dioxide: 0.71 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 61.88 μg/m3

Astronomical

Sunrise: 5:04 AM
Sun Transit: 1:00 PM
Sunset: 8:58 PM
Daylight: 15 hrs 54 mins
Moonrise: 1:21 AM
Moon Transit: 12:00 AM
Moonset: 1:13 PM
Moon Phase: Last Quarter
Moon Illumination: 31.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

12:43 AM - 2:13 PM
12:51 AM - 2:21 AM

Action Rating: 2 out of 5

Tuesday, June 9, 2026

Weather Forecast

Patchy rain nearby
56.9°F
50.5°F
52.5°F
99%
0.16 in
97%
0%
8.9 mph
3


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: 5:03 AM
Sun Transit: 1:00 PM
Sunset: 8:58 PM
Daylight: 15 hrs 55 mins
Moonrise: 1:37 AM
Moon Transit: 5:27 AM
Moonset: 2:28 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

1:58 PM - 3:28 PM
1:07 AM - 2:37 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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