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

Current Water Temperature

56.8°F

Measurement Time: Sunday, July 12, 2026, 6:30 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

78.1°F
Sunny
Sunny
79.4°F
83.9°F
54%
SW 11 mph
16.2 mph
82.4°F
62.4°F
0 in
0%
9 mi
1018 mbar
2.2

Five Day Weather Forecast

Sunny
Sun
H: 88°F
L: 59°F
Sunny
Mon
H: 82°F
L: 68°F
Sunny
Tue
H: 78°F
L: 62°F
Sunny
Wed
H: 75°F
L: 58°F
Sunny
Thu
H: 68°F
L: 53°F

Air Quality

AQI: 1 - Good
PM2.5: 6.2 μg/m3
PM10: 6.8 μg/m3
Carbon Monoxide: 125 μg/m3
Nitrogen Dioxide: 1.1 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 1:42 PM
Sunset: 9:28 PM
Daylight: 15 hrs 32 mins
Moonrise: 3:18 AM
Moon Transit: 11:55 AM
Moonset: 8:33 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:25 AM - 1:55 PM

Minor Periods

8:03 PM - 9:33 PM
2:48 AM - 4:18 AM

Action Rating: 3 out of 5

squall watch in effect

Effective: Sun July 12, 2026, 10:00 AM
Expires: Sun July 12, 2026, 6:59 PM

Conditions are favourable for the development of squalls with wind gusts up to 35 knots, frequent lightning, hail and poor to very poor visibility in thunderstorms heavy at times. Thunderstorms are expected to track southeast across portions of Lake Superior through this morning and early afternoon. ### 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.


squall watch in effect

Effective: Sun July 12, 2026, 10:00 AM
Expires: Sun July 12, 2026, 6:59 PM

Conditions are favourable for the development of squalls with wind gusts up to 35 knots, frequent lightning, hail and poor to very poor visibility in thunderstorms heavy at times. ### 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.
Sunday, July 12, 2026

Weather Forecast

Sunny
88.2°F
58.6°F
73.9°F
64%
0 in
4%
0%
12.3 mph
8.2


Air Quality

AQI: 1 - Good
PM2.5: 7.88 μg/m3
PM10: 8.22 μg/m3
Carbon Monoxide: 145.38 μg/m3
Nitrogen Dioxide: 2.16 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 75.71 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 1:42 PM
Sunset: 9:28 PM
Daylight: 15 hrs 32 mins
Moonrise: 3:18 AM
Moon Transit: 11:55 AM
Moonset: 8:33 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:25 AM - 1:55 PM

Minor Periods

8:03 PM - 9:33 PM
2:48 AM - 4:18 AM

Action Rating: 3 out of 5

Monday, July 13, 2026

Weather Forecast

Sunny
82.1°F
67.5°F
74.4°F
70%
0 in
8%
0%
12.1 mph
8.7


Air Quality

AQI: 1 - Good
PM2.5: 5.63 μg/m3
PM10: 6 μg/m3
Carbon Monoxide: 136.04 μg/m3
Nitrogen Dioxide: 2.37 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 86.08 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 1:43 PM
Sunset: 9:28 PM
Daylight: 15 hrs 30 mins
Moonrise: 4:28 AM
Moon Transit: 1:02 PM
Moonset: 9:26 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:46 AM - 3:16 AM
12:32 AM - 3:02 PM

Minor Periods

8:56 PM - 10:26 PM
3:58 AM - 5:28 AM

Action Rating: 4 out of 5

Tuesday, July 14, 2026

Weather Forecast

Sunny
77.8°F
61.8°F
70.8°F
70%
0 in
7%
0%
14.5 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 3.52 μg/m3
PM10: 3.65 μg/m3
Carbon Monoxide: 122.79 μg/m3
Nitrogen Dioxide: 1.73 μg/m3
Sulphur Dioxide: 0.59 μg/m3
Ozone: 89.71 μg/m3

Astronomical

Sunrise: 5:59 AM
Sun Transit: 1:43 PM
Sunset: 9:27 PM
Daylight: 15 hrs 28 mins
Moonrise: 5:50 AM
Moon Transit: 2:06 PM
Moonset: 10:06 PM
Moon Phase: New
Moon Illumination: 1.9%

Best Times for Fishing or Hunting

Major Periods

1:52 AM - 4:22 AM
1:36 PM - 4:06 PM

Minor Periods

9:36 PM - 11:06 PM
5:20 AM - 6:50 AM

Action Rating: 4 out of 5

Wednesday, July 15, 2026

Weather Forecast

Sunny
75°F
58.1°F
65.6°F
56%
0 in
3%
0%
12.3 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 3.58 μg/m3
PM10: 3.63 μg/m3
Carbon Monoxide: 151.36 μg/m3
Nitrogen Dioxide: 2.09 μg/m3
Sulphur Dioxide: 0.66 μg/m3
Ozone: 77.58 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:43 PM
Sunset: 9:26 PM
Daylight: 15 hrs 27 mins
Moonrise: 7:16 AM
Moon Transit: 3:04 PM
Moonset: 10:35 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

2:53 AM - 5:23 AM
2:34 PM - 5:04 PM

Minor Periods

10:05 PM - 11:35 PM
6:46 AM - 8:16 AM

Action Rating: 3 out of 5

Thursday, July 16, 2026

Weather Forecast

Sunny
68.4°F
52.5°F
61°F
57%
0 in
3%
0%
15.7 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 3.89 μg/m3
PM10: 3.9 μg/m3
Carbon Monoxide: 163.78 μg/m3
Nitrogen Dioxide: 2.59 μg/m3
Sulphur Dioxide: 0.67 μg/m3
Ozone: 77.33 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:43 PM
Sunset: 9:25 PM
Daylight: 15 hrs 25 mins
Moonrise: 8:41 AM
Moon Transit: 3:57 PM
Moonset: 10:57 PM
Moon Phase: New
Moon Illumination: 2.4%

Best Times for Fishing or Hunting

Major Periods

3:49 AM - 6:19 AM
3:27 PM - 5:57 PM

Minor Periods

10:27 PM - 11:57 PM
8:11 AM - 9:41 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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