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

Current Water Temperature

49.6°F

Measurement Time: Thursday, June 18, 2026, 11:36 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

48.9°F
Clear
Clear
46°F
52°F
93%
WNW 6.7 mph
14.1 mph
48.8°F
49.4°F
0 in
0%
9 mi
1006 mbar
0

Five Day Weather Forecast

Moderate rain
Thu
H: 62°F
L: 52°F
Partly Cloudy
Fri
H: 64°F
L: 45°F
Partly Cloudy
Sat
H: 64°F
L: 43°F
Partly Cloudy
Sun
H: 63°F
L: 45°F
Sunny
Mon
H: 65°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 6.7 μg/m3
PM10: 7.4 μg/m3
Carbon Monoxide: 114 μg/m3
Nitrogen Dioxide: 2.1 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 73 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:38 PM
Sunset: 9:33 PM
Daylight: 15 hrs 49 mins
Moonrise: 9:46 AM
Moon Transit: 5:19 PM
Moonset: 12:10 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

5:10 AM - 7:40 AM
4:49 PM - 7:19 PM

Minor Periods

9:16 AM - 10:46 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Small Craft Advisory issued June 18 at 1:54PM EDT until June 18 at 8:00PM EDT by NWS Gaylord MI

Effective: Thu June 18, 2026, 1:54 PM
Expires: Thu June 18, 2026, 8:00 PM

* WHAT...Highest gusts up to 25 kts from the northwest and highest waves around 4 feet expected. * WHERE...Whitefish Bay (U. S. Portion)/Whitefish Point to Point Iroquois MI and St. Marys River Point Iroquois to E. Potagannissing Bay. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Thursday, June 18, 2026

Weather Forecast

Moderate rain
61.7°F
51.8°F
56.2°F
89%
0.2 in
80%
0%
15 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 4.55 μg/m3
PM10: 4.95 μg/m3
Carbon Monoxide: 118.17 μg/m3
Nitrogen Dioxide: 2.27 μg/m3
Sulphur Dioxide: 0.54 μg/m3
Ozone: 66.54 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:38 PM
Sunset: 9:33 PM
Daylight: 15 hrs 49 mins
Moonrise: 9:46 AM
Moon Transit: 5:19 PM
Moonset: 12:10 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

5:10 AM - 7:40 AM
4:49 PM - 7:19 PM

Minor Periods

9:16 AM - 10:46 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, June 19, 2026

Weather Forecast

Partly Cloudy
64.4°F
45°F
54.2°F
79%
0 in
12%
0%
14.8 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 3.79 μg/m3
PM10: 4 μg/m3
Carbon Monoxide: 103.58 μg/m3
Nitrogen Dioxide: 1.67 μg/m3
Sulphur Dioxide: 0.44 μg/m3
Ozone: 58.08 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:38 PM
Sunset: 9:33 PM
Daylight: 15 hrs 49 mins
Moonrise: 11:06 AM
Moon Transit: 6:08 PM
Moonset: 12:35 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%

Best Times for Fishing or Hunting

Major Periods

6:01 AM - 8:31 AM
5:38 PM - 8:08 PM

Minor Periods

10:36 AM - 12:06 AM
12:05 AM - 1:35 AM

Action Rating: 3 out of 5

Saturday, June 20, 2026

Weather Forecast

Partly Cloudy
64.1°F
43.3°F
53.6°F
69%
0 in
10%
0%
10.7 mph
7.3


Air Quality

AQI: 1 - Good
PM2.5: 3.41 μg/m3
PM10: 3.66 μg/m3
Carbon Monoxide: 103.83 μg/m3
Nitrogen Dioxide: 2.23 μg/m3
Sulphur Dioxide: 0.65 μg/m3
Ozone: 56.88 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:38 PM
Sunset: 9:33 PM
Daylight: 15 hrs 49 mins
Moonrise: 12:22 AM
Moon Transit: 6:54 PM
Moonset: 12:55 AM
Moon Phase: Waxing Crescent
Moon Illumination: 27.8%

Best Times for Fishing or Hunting

Major Periods

6:49 AM - 9:19 AM
6:24 PM - 8:54 PM

Minor Periods

11:52 AM - 1:22 PM
12:25 AM - 1:55 AM

Action Rating: 2 out of 5

Sunday, June 21, 2026

Weather Forecast

Partly Cloudy
62.7°F
45.1°F
52.7°F
75%
0 in
17%
0%
10.1 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 1.79 μg/m3
PM10: 1.86 μg/m3
Carbon Monoxide: 109.33 μg/m3
Nitrogen Dioxide: 1.98 μg/m3
Sulphur Dioxide: 0.57 μg/m3
Ozone: 58.75 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:39 PM
Sunset: 9:34 PM
Daylight: 15 hrs 49 mins
Moonrise: 1:34 PM
Moon Transit: 7:37 PM
Moonset: 1:12 AM
Moon Phase: First Quarter
Moon Illumination: 38.5%

Best Times for Fishing or Hunting

Major Periods

7:33 AM - 10:03 AM
7:07 PM - 9:37 PM

Minor Periods

1:04 PM - 2:34 PM
12:42 AM - 2:12 AM

Action Rating: 3 out of 5

Monday, June 22, 2026

Weather Forecast

Sunny
64.7°F
43.9°F
53.7°F
77%
0 in
17%
0%
11.4 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 0.7 μg/m3
PM10: 0.71 μg/m3
Carbon Monoxide: 105.49 μg/m3
Nitrogen Dioxide: 1.88 μg/m3
Sulphur Dioxide: 0.53 μg/m3
Ozone: 46.38 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:39 PM
Sunset: 9:34 PM
Daylight: 15 hrs 49 mins
Moonrise: 2:43 PM
Moon Transit: 8:20 PM
Moonset: 1:29 AM
Moon Phase: First Quarter
Moon Illumination: 49.7%

Best Times for Fishing or Hunting

Major Periods

8:15 AM - 10:45 AM
7:50 PM - 10:20 PM

Minor Periods

2:13 PM - 3:43 PM
12:59 AM - 2:29 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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