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

Current Water Temperature

41.7°F

Measurement Time: Thursday, May 21, 2026, 12:18 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

32.3°F
Clear
Clear
27.4°F
32.3°F
80%
NNW 4.9 mph
10.3 mph
27.4°F
26.5°F
0 in
14%
6 mi
1030 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 59°F
L: 32°F
Partly Cloudy
Fri
H: 62°F
L: 36°F
Partly Cloudy
Sat
H: 64°F
L: 44°F
Patchy rain nearby
Sun
H: 56°F
L: 48°F
Fog
Mon
H: 72°F
L: 50°F

Air Quality

PM2.5: 1.95 μg/m3
PM10: 2.15 μg/m3
Carbon Monoxide: 126.85 μg/m3
Nitrogen Dioxide: 4.55 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 60 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

Frost Advisory issued May 20 at 1:35PM EDT until May 21 at 9:00AM EDT by NWS Gaylord MI

Effective: Wed May 20, 2026, 1:35 PM
Expires: Thu May 21, 2026, 9:00 AM

* WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Southeast Chippewa County. * WHEN...From 1 AM to 9 AM EDT Thursday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.


Freeze Warning issued May 20 at 1:35PM EDT until May 21 at 9:00AM EDT by NWS Gaylord MI

Effective: Wed May 20, 2026, 1:35 PM
Expires: Thu May 21, 2026, 9:00 AM

* WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Central Chippewa, Eastern Mackinac, Western Chippewa, and Western Mackinac Counties. * WHEN...From 1 AM to 9 AM EDT Thursday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation.

Take steps now to protect tender plants from the cold.
Thursday, May 21, 2026

Weather Forecast

Sunny
58.8°F
32°F
45°F
61%
0 in
0%
0%
6.7 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 2.35 μg/m3
PM10: 2.75 μg/m3
Carbon Monoxide: 129.96 μg/m3
Nitrogen Dioxide: 3.05 μg/m3
Sulphur Dioxide: 1.6 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

Partly Cloudy
62.3°F
36.3°F
49.3°F
56%
0 in
0%
0%
8.7 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 3.8 μg/m3
PM10: 4.26 μg/m3
Carbon Monoxide: 143.65 μg/m3
Nitrogen Dioxide: 3.99 μg/m3
Sulphur Dioxide: 1.41 μg/m3
Ozone: 64.68 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

Saturday, May 23, 2026

Weather Forecast

Partly Cloudy
64°F
43.9°F
52.1°F
66%
0 in
0%
0%
16.3 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 3.48 μg/m3
PM10: 3.75 μg/m3
Carbon Monoxide: 136.85 μg/m3
Nitrogen Dioxide: 2.66 μg/m3
Sulphur Dioxide: 1.23 μg/m3
Ozone: 69.85 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:34 PM
Sunset: 9:14 PM
Daylight: 15 hrs 19 mins
Moonrise: 1:23 PM
Moon Transit: 8:14 PM
Moonset: 2:33 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

8:08 AM - 10:38 AM
7:44 PM - 10:14 PM

Minor Periods

12:53 AM - 2:23 PM
2:03 AM - 3:33 AM

Action Rating: 2 out of 5

Sunday, May 24, 2026

Weather Forecast

Patchy rain nearby
55.8°F
48.1°F
51°F
86%
0.02 in
81%
0%
12.1 mph
3


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 1:34 PM
Sunset: 9:15 PM
Daylight: 15 hrs 21 mins
Moonrise: 2:35 PM
Moon Transit: 8:57 PM
Moonset: 2:51 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

8:53 AM - 11:23 AM
8:27 PM - 10:57 PM

Minor Periods

2:05 PM - 3:35 PM
2:21 AM - 3:51 AM

Action Rating: 2 out of 5

Monday, May 25, 2026

Weather Forecast

Fog
71.9°F
49.6°F
58.7°F
89%
0 in
0%
0%
9.2 mph
3


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 1:34 PM
Sunset: 9:16 PM
Daylight: 15 hrs 23 mins
Moonrise: 3:44 PM
Moon Transit: 9:39 PM
Moonset: 3:07 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

9:35 AM - 12:05 AM
9:09 PM - 11:39 PM

Minor Periods

3:14 PM - 4:44 PM
2:37 AM - 4:07 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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