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

Current Water Temperature

41.4°F

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

51.1°F
Mist
Mist
47°F
53.3°F
96%
ESE 11 mph
19.3 mph
50.5°F
50.7°F
0 in
100%
4 mi
1011 mbar
0.3

Five Day Weather Forecast

Moderate rain
Mon
H: 72°F
L: 50°F
Moderate rain
Tue
H: 64°F
L: 39°F
Sunny
Wed
H: 43°F
L: 31°F
Sunny
Thu
H: 56°F
L: 31°F
Patchy rain nearby
Fri
H: 58°F
L: 36°F

Air Quality

AQI: 1 - Good
PM2.5: 7.95 μg/m3
PM10: 8.55 μg/m3
Carbon Monoxide: 148.85 μg/m3
Nitrogen Dioxide: 3.05 μg/m3
Sulphur Dioxide: 1.85 μg/m3
Ozone: 83 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

Monday, May 18, 2026

Weather Forecast

Moderate rain
72.1°F
50°F
57.9°F
94%
0.22 in
88%
0%
13 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

Moderate rain
63.9°F
39.3°F
52.7°F
97%
0.66 in
89%
0%
15.9 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
42.7°F
31°F
37.6°F
72%
0 in
0%
0%
16.8 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
56.4°F
30.7°F
43.2°F
62%
0 in
0%
0%
11.4 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

Patchy rain nearby
58.2°F
36.1°F
43°F
73%
0.07 in
67%
0%
8.9 mph
2


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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