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

Current Water Temperature

56.8°F

Measurement Time: Monday, October 20, 2025, 2:54 PM EDT

Temperature Locations

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Local Points of Interest

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

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St. Marys River

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

Elevation Above Sea Level: 568 feet / 173 meters

Sensor Depth: -8.2 feet / -2.5 meters

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 (125.0 mi)
Au Sable River, Mio, MI (126.4 mi)

Weather for Sault Ste. Marie, Michigan

Current Weather

54°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 57%
Feels Like: 52.8°F
Wind: WSW 5.1 mph
Wind Gusts: 6.3 mph
Pressure: 29.87 in
Precipitation: 0 in
Cloud Cover: 50%
Visibility: 9 mi
UV Index: 2.2

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 53°F
L: 42°F
Moderate rain
Tue
H: 50°F
L: 41°F
Cloudy
Wed
H: 47°F
L: 43°F
Patchy rain nearby
Thu
H: 43°F
L: 37°F
Patchy rain nearby
Fri
H: 44°F
L: 39°F

Air Quality

AQI: 1 - Good
PM2.5: 2.55 μg/m3
PM10: 2.65 μg/m3
Carbon Monoxide: 171.85 μg/m3
Nitrogen Dioxide: 4.95 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 69 μg/m3

Astronomical

Sunrise: 8:02 AM
Sun Transit: 1:21 PM
Sunset: 6:41 PM
Daylight: 10 hrs 39 mins
Moonrise: 7:11 AM
Moon Transit: 12:43 AM
Moonset: 6:05 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:40 AM - 3:10 AM
12:13 AM - 2:43 PM

Minor Periods

5:35 PM - 7:05 PM
6:41 AM - 8:11 AM

Action Rating: 4 out of 5

Monday, October 20, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 47.1°F
Average Humidity: 83%
Chance of Rain: 76%
Wind: 15 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 1.43 μg/m3
PM10: 1.47 μg/m3
Carbon Monoxide: 159.61 μg/m3
Nitrogen Dioxide: 2.47 μg/m3
Sulphur Dioxide: 1.41 μg/m3
Ozone: 63.48 μg/m3

Astronomical

Sunrise: 8:02 AM
Sun Transit: 1:21 PM
Sunset: 6:41 PM
Daylight: 10 hrs 39 mins
Moonrise: 7:11 AM
Moon Transit: 12:43 AM
Moonset: 6:05 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:40 AM - 3:10 AM
12:13 AM - 2:43 PM

Minor Periods

5:35 PM - 7:05 PM
6:41 AM - 8:11 AM

Action Rating: 4 out of 5

Tuesday, October 21, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 47.5°F
Average Humidity: 87%
Chance of Rain: 89%
Wind: 14.1 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 3.19 μg/m3
PM10: 3.27 μg/m3
Carbon Monoxide: 158.61 μg/m3
Nitrogen Dioxide: 3.91 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 66.68 μg/m3

Astronomical

Sunrise: 8:04 AM
Sun Transit: 1:21 PM
Sunset: 6:40 PM
Daylight: 10 hrs 36 mins
Moonrise: 8:18 AM
Moon Transit: 1:25 PM
Moonset: 6:23 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

1:21 AM - 3:51 AM
12:55 AM - 3:25 PM

Minor Periods

5:53 PM - 7:23 PM
7:48 AM - 9:18 AM

Action Rating: 4 out of 5

Wednesday, October 22, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 44.9°F
Average Humidity: 84%
Chance of Rain: 0%
Wind: 11.4 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 2.68 μg/m3
PM10: 2.72 μg/m3
Carbon Monoxide: 152.61 μg/m3
Nitrogen Dioxide: 4.27 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 56.28 μg/m3

Astronomical

Sunrise: 8:05 AM
Sun Transit: 1:21 PM
Sunset: 6:38 PM
Daylight: 10 hrs 33 mins
Moonrise: 9:26 AM
Moon Transit: 2:08 PM
Moonset: 6:43 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

2:03 AM - 4:33 AM
1:38 PM - 4:08 PM

Minor Periods

6:13 PM - 7:43 PM
8:56 AM - 10:26 AM

Action Rating: 4 out of 5

Thursday, October 23, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 40.8°F
Average Humidity: 78%
Chance of Rain: 89%
Wind: 15 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 1.03 μg/m3
PM10: 1.09 μg/m3
Carbon Monoxide: 150.01 μg/m3
Nitrogen Dioxide: 2.09 μg/m3
Sulphur Dioxide: 1.23 μg/m3
Ozone: 63.2 μg/m3

Astronomical

Sunrise: 8:06 AM
Sun Transit: 1:21 PM
Sunset: 6:36 PM
Daylight: 10 hrs 30 mins
Moonrise: 10:34 AM
Moon Transit: 2:54 PM
Moonset: 7:08 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
2:24 PM - 4:54 PM

Minor Periods

6:38 PM - 8:08 PM
10:04 AM - 11:34 AM

Action Rating: 4 out of 5

Friday, October 24, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 40.8°F
Average Humidity: 79%
Chance of Rain: 89%
Wind: 10.5 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 1.01 μg/m3
PM10: 1.04 μg/m3
Carbon Monoxide: 149.54 μg/m3
Nitrogen Dioxide: 2.07 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 59.54 μg/m3

Astronomical

Sunrise: 8:08 AM
Sun Transit: 1:21 PM
Sunset: 6:35 PM
Daylight: 10 hrs 27 mins
Moonrise: 11:40 AM
Moon Transit: 3:42 PM
Moonset: 7:40 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.8%

Best Times for Fishing or Hunting

Major Periods

3:35 AM - 6:05 AM
3:12 PM - 5:42 PM

Minor Periods

7:10 PM - 8:40 PM
11:10 AM - 12:40 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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