Water Temperature of Lake Superior in Terrace Bay Township, Ontario

Current Water Temperature

6.0°C

Measurement Time: Friday, November 14, 2025, 1:00 PM EST

Temperature Locations

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Local Points of Interest

Patterson Island; Pukaskwa National Park

Lake Superior

Station Name: Slate Island
Station Type: Buoy
Data Source: National Data Buoy Center

Elevation Above Sea Level: 179 meters

Nearest Address:
Terrace Bay Township, ON P0T 2W0
Thunder Bay District County

GPS Coordinates: 48.54, -86.95

Nearby Water Temperatures

Lake Superior, Isle Royale, MI (80.6 km)
Lake Superior, Copper Harbor, MI (109.6 km)
Washington Creek, Windigo, MI (176.6 km)
Lake Superior, Calumet, MI (187.6 km)
Pilgrim River, Houghton, MI (201.2 km)
Keweenaw Bay, Jacobsville, MI (205.5 km)
East Branch Salmon Trout River, Powell, MI (206.4 km)
Salmon Trout River, Champion, MI (207.4 km)
Grand Portage River, Grand Portage, MN (212.3 km)
Lake Superior, Marquette, MI (224.1 km)
Falls River, L'Anse, MI (229.8 km)
Miners River, Munising, MI (230.3 km)
Middle Branch Escanaba River, , MI (237.6 km)
Middle Branch Escanaba River, Humboldt, MI (237.8 km)
Sturgeon River, Pelkie, MI (239.1 km)

Weather for Terrace Bay Township, Ontario

Current Weather

4.1°C
Light drizzle
Light drizzle
0°C
2.2°C
97%
NW 19.4 kph
30.4 kph
-1.8°C
0.4°C
0.53 mm
0%
10 km
997 mbar
0

Five Day Weather Forecast

Light freezing rain
Sat
H: -0°C
L: -4°C
Overcast
Sun
H: -2°C
L: -7°C
Patchy moderate snow
Mon
H: -1°C
L: -6°C
Sunny
Tue
H: 7°C
L: -1°C
Partly Cloudy
Wed
H: 4°C
L: -2°C

Air Quality

PM2.5: 0.76 μg/m3
PM10: 0.86 μg/m3
Carbon Monoxide: 152.76 μg/m3
Nitrogen Dioxide: 0.86 μg/m3
Sulphur Dioxide: 0.76 μg/m3
Ozone: 81 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 1:47 PM
Sunset: 8:44 PM
Daylight: 13 hrs 52 mins
Moonrise: 6:58 AM
Moon Transit: 2:51 PM
Moonset: 11:04 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

2:17 AM - 4:47 AM
2:21 PM - 4:51 PM

Minor Periods

12:00 AM - 12:00 AM
6:28 AM - 7:58 AM

Action Rating: 4 out of 5

squall watch in effect

Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 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 Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) 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 – février 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 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 au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) 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 April 17, 2026, 11:39 PM
Expires: Sat April 18, 2026, 4:59 AM

Conditions are favourable for the development of squalls with wind gusts up to 35 knots and frequent lightning. Showers and thunderstorms are expected to continue this evening into the overnight. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Vessels without lightning protection should make their way to shore immediately. 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 – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 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 Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) 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 – février 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 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 au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) 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 April 17, 2026, 11:39 PM
Expires: Sat April 18, 2026, 4:59 AM

Conditions are favourable for the development of squalls with wind gusts up to 35 knots and frequent lightning. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Vessels without lightning protection should make their way to shore immediately. 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 – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 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 Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) 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 – février 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 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 au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) 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 April 17, 2026, 9:52 PM
Expires: Sat April 18, 2026, 5:00 AM

Conditions are favourable for the development of squalls with wind gusts up to 35 knots and frequent lightning. Showers and thunderstorms are expected to continue this evening into the overnight. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Vessels without lightning protection should make their way to shore immediately. 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 – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 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 Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) 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 – février 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 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 au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) 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 April 17, 2026, 6:26 PM
Expires: Sat April 18, 2026, 1:59 AM

Conditions are favourable for the development of squalls with wind gusts up to 35 knots and frequent lightning. Thunderstorms are expected to cross the lake from west to east later this evening. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Vessels without lightning protection should make their way to shore immediately. 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 – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 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 Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) 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 – février 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 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 au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) 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 April 17, 2026, 6:26 PM
Expires: Sat April 18, 2026, 1:59 AM

Conditions are favourable for the development of squalls with wind gusts up to 35 knots and frequent lightning. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Vessels without lightning protection should make their way to shore immediately. 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.


Saturday, April 18, 2026

Weather Forecast

Light freezing rain
-0.4°C
-4.1°C
-0.8°C
72%
6.92 mm
74%
34%
32.8 kph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.67 μg/m3
PM10: 2.86 μg/m3
Carbon Monoxide: 155.68 μg/m3
Nitrogen Dioxide: 1.11 μg/m3
Sulphur Dioxide: 0.87 μg/m3
Ozone: 90.36 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 1:47 PM
Sunset: 8:44 PM
Daylight: 13 hrs 52 mins
Moonrise: 6:58 AM
Moon Transit: 2:51 PM
Moonset: 11:04 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

2:17 AM - 4:47 AM
2:21 PM - 4:51 PM

Minor Periods

12:00 AM - 12:00 AM
6:28 AM - 7:58 AM

Action Rating: 4 out of 5

Sunday, April 19, 2026

Weather Forecast

Overcast
-2°C
-7.4°C
-4.5°C
51%
0.08 mm
0%
20%
27.7 kph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.31 μg/m3
PM10: 2.89 μg/m3
Carbon Monoxide: 155.32 μg/m3
Nitrogen Dioxide: 0.85 μg/m3
Sulphur Dioxide: 1.01 μg/m3
Ozone: 90.76 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 1:46 PM
Sunset: 8:45 PM
Daylight: 13 hrs 56 mins
Moonrise: 7:29 AM
Moon Transit: 3:52 PM
Moonset: 12:04 AM
Moon Phase: Waxing Crescent
Moon Illumination: 4.9%

Best Times for Fishing or Hunting

Major Periods

3:16 AM - 5:46 AM
3:22 PM - 5:52 PM

Minor Periods

6:59 AM - 8:29 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, April 20, 2026

Weather Forecast

Patchy moderate snow
-0.5°C
-6.1°C
-2.9°C
66%
0.9 mm
78%
17%
30.6 kph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.97 μg/m3
PM10: 3.73 μg/m3
Carbon Monoxide: 150.18 μg/m3
Nitrogen Dioxide: 1.01 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 97.96 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 1:46 PM
Sunset: 8:47 PM
Daylight: 13 hrs 59 mins
Moonrise: 8:12 AM
Moon Transit: 4:56 PM
Moonset: 12:31 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

4:19 AM - 6:49 AM
4:26 PM - 6:56 PM

Minor Periods

7:42 AM - 9:12 AM
12:01 AM - 1:31 AM

Action Rating: 3 out of 5

Tuesday, April 21, 2026

Weather Forecast

Sunny
6.8°C
-0.6°C
2.7°C
67%
0.01 mm
0%
0%
20.5 kph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 3.45 μg/m3
PM10: 4.11 μg/m3
Carbon Monoxide: 162.68 μg/m3
Nitrogen Dioxide: 1.43 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 99.15 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 1:46 PM
Sunset: 8:48 PM
Daylight: 14 hrs 2 mins
Moonrise: 9:10 AM
Moon Transit: 6:01 PM
Moonset: 1:47 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%

Best Times for Fishing or Hunting

Major Periods

5:24 AM - 7:54 AM
5:31 PM - 8:01 PM

Minor Periods

8:40 AM - 10:10 AM
1:17 AM - 2:47 AM

Action Rating: 2 out of 5

Wednesday, April 22, 2026

Weather Forecast

Partly Cloudy
3.8°C
-1.9°C
0.7°C
74%
0 mm
0%
0%
13 kph
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: 6:44 AM
Sun Transit: 1:46 PM
Sunset: 8:50 PM
Daylight: 14 hrs 6 mins
Moonrise: 10:23 AM
Moon Transit: 7:03 PM
Moonset: 2:48 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%

Best Times for Fishing or Hunting

Major Periods

6:28 AM - 8:58 AM
6:33 PM - 9:03 PM

Minor Periods

9:53 AM - 11:23 AM
2:18 AM - 3:48 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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