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

Current Water Temperature

60.4°F

Measurement Time: Tuesday, July 21, 2026, 12:24 AM 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

66°F
Mist
Mist
66°F
66.7°F
96%
S 7.2 mph
11.9 mph
66.7°F
64.8°F
0 in
100%
4 mi
999 mbar
0

Five Day Weather Forecast

Overcast
Tue
H: 67°F
L: 53°F
Sunny
Wed
H: 64°F
L: 50°F
Sunny
Thu
H: 74°F
L: 49°F
Partly Cloudy
Fri
H: 78°F
L: 53°F
Partly Cloudy
Sat
H: 78°F
L: 58°F

Air Quality

AQI: 1 - Good
PM2.5: 11.3 μg/m3
PM10: 11.4 μg/m3
Carbon Monoxide: 194 μg/m3
Nitrogen Dioxide: 2 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 130 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:43 PM
Sunset: 9:21 PM
Daylight: 15 hrs 15 mins
Moonrise: 2:49 PM
Moon Transit: 7:43 PM
Moonset: 12:08 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

7:37 AM - 10:07 AM
7:13 PM - 9:43 PM

Minor Periods

2:19 PM - 3:49 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Marine Weather Statement issued July 20 at 8:08PM EDT by NWS Gaylord MI

Effective: Mon July 20, 2026, 8:08 PM
Expires: Tue July 21, 2026, 12:00 AM

Water level gauges on the St. Mary's River continued to indicate rapidly changing water levels. Several cycles of water level falls and rises are likely between 8 PM and 12AM tonight. After a recent rise, another significant drop in water levels of up to 3 to 4 feet can be expected between 8 PM and 930 PM on upper portions of the river from Point Iroquois to the locks at Sault Ste. Marie. Another rise in water levels is likely after this drop. Mariners should be aware of rapidly rising and falling water levels...particularly for operators above the Soo Locks. Be sure to monitor marine radio for information on this situation.
Tuesday, July 21, 2026

Weather Forecast

Overcast
67.1°F
52.8°F
60.9°F
88%
0.02 in
57%
0%
20.4 mph
3.5


Air Quality

AQI: 1 - Good
PM2.5: 4.52 μg/m3
PM10: 4.56 μg/m3
Carbon Monoxide: 143.21 μg/m3
Nitrogen Dioxide: 1.61 μg/m3
Sulphur Dioxide: 0.48 μg/m3
Ozone: 86.33 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:43 PM
Sunset: 9:21 PM
Daylight: 15 hrs 15 mins
Moonrise: 2:49 PM
Moon Transit: 7:43 PM
Moonset: 12:08 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

7:37 AM - 10:07 AM
7:13 PM - 9:43 PM

Minor Periods

2:19 PM - 3:49 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
63.7°F
50.1°F
57.2°F
65%
0 in
6%
0%
16.6 mph
6.5


Air Quality

AQI: 1 - Good
PM2.5: 3.1 μg/m3
PM10: 3.26 μg/m3
Carbon Monoxide: 104.17 μg/m3
Nitrogen Dioxide: 0.99 μg/m3
Sulphur Dioxide: 0.31 μg/m3
Ozone: 71.21 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 1:43 PM
Sunset: 9:20 PM
Daylight: 15 hrs 13 mins
Moonrise: 3:58 PM
Moon Transit: 8:28 PM
Moonset: 12:28 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

8:22 AM - 10:52 AM
7:58 PM - 10:28 PM

Minor Periods

3:28 PM - 4:58 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
73.9°F
49.4°F
61.2°F
62%
0 in
4%
0%
9.4 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 3.29 μg/m3
PM10: 3.43 μg/m3
Carbon Monoxide: 108.83 μg/m3
Nitrogen Dioxide: 1.78 μg/m3
Sulphur Dioxide: 0.51 μg/m3
Ozone: 72.21 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:43 PM
Sunset: 9:19 PM
Daylight: 15 hrs 11 mins
Moonrise: 5:06 PM
Moon Transit: 9:16 PM
Moonset: 12:52 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

9:09 AM - 11:39 AM
8:46 PM - 11:16 PM

Minor Periods

4:36 PM - 6:06 PM
12:22 AM - 1:52 AM

Action Rating: 2 out of 5

Friday, July 24, 2026

Weather Forecast

Partly Cloudy
78.4°F
53.3°F
65.4°F
72%
0 in
17%
0%
11.9 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 3.51 μg/m3
PM10: 3.62 μg/m3
Carbon Monoxide: 122.27 μg/m3
Nitrogen Dioxide: 1.8 μg/m3
Sulphur Dioxide: 0.49 μg/m3
Ozone: 87.92 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 1:43 PM
Sunset: 9:18 PM
Daylight: 15 hrs 9 mins
Moonrise: 6:10 PM
Moon Transit: 10:06 PM
Moonset: 1:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

9:58 AM - 12:28 AM
12:00 AM - 12:00 AM

Minor Periods

5:40 PM - 7:10 PM
12:52 AM - 2:22 AM

Action Rating: 3 out of 5

Saturday, July 25, 2026

Weather Forecast

Partly Cloudy
78.3°F
57.7°F
67.8°F
71%
0 in
7%
0%
12.1 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 4.07 μg/m3
PM10: 4.2 μg/m3
Carbon Monoxide: 148.22 μg/m3
Nitrogen Dioxide: 2.28 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 92 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:43 PM
Sunset: 9:17 PM
Daylight: 15 hrs 6 mins
Moonrise: 7:07 PM
Moon Transit: 10:57 PM
Moonset: 2:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

10:49 AM - 1:19 PM
12:00 AM - 12:00 AM

Minor Periods

6:37 PM - 8:07 PM
1:30 AM - 3:00 AM

Action Rating: 2 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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