Water Temperature of the St. Marys River in Sault Ste. Marie, MI

Current Water Temperature

41.5°F

Measurement Time: Monday, May 18, 2026, 8:00 PM EDT

Temperature Locations

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Local Points of Interest

Rotary Park; Rotary Island; Steers Island; Island Number One; Sault Sainte Marie

St. Marys River

Station Name: Little Rapids
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 568 feet

Sensor Depth: -8 feet

Nearest Address:
1425 Riverside Dr
Sault Ste. Marie, MI 49783
Chippewa County

GPS Coordinates: 46.485832, -84.301666

Nearby Water Temperatures

St. Marys River, Sault Ste. Marie, MI (3.5 mi)
St. Marys River, Barbeau, MI (14.5 mi)
St. Marys River, Barbeau, MI (16.2 mi)
Lake Huron, De Tour Village, MI (39.2 mi)
Lake Huron, Bois Blanc Island, MI (49.9 mi)
Straits of Mackinac, Mackinaw City, MI (50.9 mi)
Seul Choix Bay, Port Inland, MI (83.1 mi)
Little Traverse Bay, Petoskey, MI (83.7 mi)
Lake Huron, Alpena, MI (105.3 mi)
Miners River, Munising, MI (106.5 mi)
Thunder Bay River, Alpena, MI (106.9 mi)
Lake Huron, Alpena, MI (114.8 mi)
North Branch Au Sable River, Grayling, MI (122.4 mi)
Au Sable River, Luzerne, MI (125 mi)
Au Sable River, Mio, MI (126.4 mi)

Weather for Sault Ste. Marie, Michigan

Current Weather

69.1°F
Mist
Mist
69.1°F
63.5°F
68%
SSW 2.2 mph
6.7 mph
63.5°F
63.5°F
0 in
25%
9 mi
1009 mbar
0.2

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 70°F
L: 50°F
Patchy rain nearby
Tue
H: 61°F
L: 39°F
Sunny
Wed
H: 43°F
L: 33°F
Sunny
Thu
H: 58°F
L: 31°F
Partly Cloudy
Fri
H: 63°F
L: 37°F

Air Quality

AQI: 1 - Good
PM2.5: 7.85 μg/m3
PM10: 8.05 μg/m3
Carbon Monoxide: 176.85 μg/m3
Nitrogen Dioxide: 5.25 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 84 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:33 PM
Sunset: 9:08 PM
Daylight: 15 hrs 8 mins
Moonrise: 6:56 AM
Moon Transit: 3:33 PM
Moonset: 12:01 AM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

3:17 AM - 5:47 AM
3:03 PM - 5:33 PM

Minor Periods

6:26 AM - 7:56 AM
12:00 AM - 12:00 AM

Action Rating: 5 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: Mon May 18, 2026, 11:24 AM
Expires: Tue May 19, 2026, 2:00 AM

Conditions are favourable for the development of squalls with wind gusts up to 45 knots and hail. Thunderstorms are expected to move eastward across the area this afternoon into 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.


squall warning 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: Mon May 18, 2026, 3:55 PM
Expires: Mon May 18, 2026, 6:54 PM

Squalls with wind gusts up to 45 knots and hail up to 3 centimetres are expected or occurring in the area. As of 3:50 p.m. EDT, an area of thunderstorms is located near Great Duck Island, moving northeastward at 40 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 squalls. If underway, seek safe harbour immediately.


squall warning 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: Mon May 18, 2026, 3:55 PM
Expires: Mon May 18, 2026, 6:54 PM

Squalls with wind gusts up to 45 knots and hail up to 3 centimetres are expected or occurring in the area. ### 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 squalls. If underway, seek safe harbour immediately.


Monday, May 18, 2026

Weather Forecast

Patchy rain nearby
69.8°F
50°F
58.3°F
93%
0.14 in
87%
0%
12.8 mph
4.7


Air Quality

AQI: 1 - Good
PM2.5: 4.82 μg/m3
PM10: 5.13 μg/m3
Carbon Monoxide: 143.45 μg/m3
Nitrogen Dioxide: 2.83 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 78.96 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:33 PM
Sunset: 9:08 PM
Daylight: 15 hrs 8 mins
Moonrise: 6:56 AM
Moon Transit: 3:33 PM
Moonset: 12:01 AM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

3:17 AM - 5:47 AM
3:03 PM - 5:33 PM

Minor Periods

6:26 AM - 7:56 AM
12:00 AM - 12:00 AM

Action Rating: 5 out of 5

Tuesday, May 19, 2026

Weather Forecast

Patchy rain nearby
61°F
38.5°F
52.1°F
93%
0.1 in
92%
0%
14.8 mph
2.8


Air Quality

AQI: 1 - Good
PM2.5: 4.01 μg/m3
PM10: 4.12 μg/m3
Carbon Monoxide: 157.21 μg/m3
Nitrogen Dioxide: 3.64 μg/m3
Sulphur Dioxide: 1.63 μg/m3
Ozone: 73.12 μg/m3

Astronomical

Sunrise: 5:59 AM
Sun Transit: 1:33 PM
Sunset: 9:09 PM
Daylight: 15 hrs 10 mins
Moonrise: 8:05 AM
Moon Transit: 4:39 PM
Moonset: 12:11 AM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

4:24 AM - 6:54 AM
4:09 PM - 6:39 PM

Minor Periods

7:35 AM - 9:05 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, May 20, 2026

Weather Forecast

Sunny
42.9°F
32.8°F
38.2°F
70%
0 in
0%
0%
15.9 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 1.26 μg/m3
PM10: 1.39 μg/m3
Carbon Monoxide: 119.77 μg/m3
Nitrogen Dioxide: 1.57 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 72.4 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 1:33 PM
Sunset: 9:10 PM
Daylight: 15 hrs 12 mins
Moonrise: 9:24 AM
Moon Transit: 5:41 PM
Moonset: 1:04 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

5:28 AM - 7:58 AM
5:11 PM - 7:41 PM

Minor Periods

8:54 AM - 10:24 AM
12:34 AM - 2:04 AM

Action Rating: 3 out of 5

Thursday, May 21, 2026

Weather Forecast

Sunny
58.3°F
31.4°F
44.4°F
63%
0 in
0%
0%
5.8 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 2.41 μg/m3
PM10: 2.85 μg/m3
Carbon Monoxide: 129.86 μg/m3
Nitrogen Dioxide: 3.29 μg/m3
Sulphur Dioxide: 1.62 μg/m3
Ozone: 68.6 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 1:33 PM
Sunset: 9:11 PM
Daylight: 15 hrs 15 mins
Moonrise: 10:47 AM
Moon Transit: 6:37 PM
Moonset: 1:42 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

6:27 AM - 8:57 AM
6:07 PM - 8:37 PM

Minor Periods

10:17 AM - 11:47 AM
1:12 AM - 2:42 AM

Action Rating: 2 out of 5

Friday, May 22, 2026

Weather Forecast

Partly Cloudy
62.9°F
36.9°F
49.6°F
57%
0 in
0%
0%
8.9 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 3 μg/m3
PM10: 3.37 μg/m3
Carbon Monoxide: 129.75 μg/m3
Nitrogen Dioxide: 3.2 μg/m3
Sulphur Dioxide: 1.28 μg/m3
Ozone: 69 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 1:33 PM
Sunset: 9:12 PM
Daylight: 15 hrs 17 mins
Moonrise: 12:07 AM
Moon Transit: 7:28 PM
Moonset: 2:11 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

7:20 AM - 9:50 AM
6:58 PM - 9:28 PM

Minor Periods

11:37 AM - 1:07 PM
1:41 AM - 3:11 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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