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

Current Water Temperature

67.6°F

Measurement Time: Tuesday, July 21, 2026, 9:12 AM EDT

Temperature Locations

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Local Points of Interest

Ashmun Bay; Whitefish Island; St. Mary's Island; Soo Locks; Sault Sainte Marie

St. Marys River

Station Name: S.W. Pier, St. Marys River
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 597 feet

Sensor Depth: -4 feet

Nearest Address:
Point West Dr
Sault Ste. Marie, MI 49783
Chippewa County

GPS Coordinates: 46.501111, -84.372611

Nearby Water Temperatures

St. Marys River, Sault Ste. Marie, MI (3.5 mi)
St. Marys River, Barbeau, MI (16.8 mi)
St. Marys River, Barbeau, MI (18.5 mi)
Lake Huron, De Tour Village, MI (41.8 mi)
Straits of Mackinac, Mackinaw City, MI (50.5 mi)
Lake Huron, Bois Blanc Island, MI (51.6 mi)
Seul Choix Bay, Port Inland, MI (80.5 mi)
Little Traverse Bay, Petoskey, MI (83.1 mi)
Miners River, Munising, MI (103.1 mi)
Lake Huron, Alpena, MI (108.3 mi)
Thunder Bay River, Alpena, MI (109.3 mi)
Lake Huron, Alpena, MI (117.3 mi)
North Branch Au Sable River, Grayling, MI (123.3 mi)
Au Sable River, Luzerne, MI (126.1 mi)
Lake Michigan, Leland, MI (126.3 mi)

Weather for Sault Ste. Marie, Michigan

Current Weather

60.1°F
Mist
Mist
60.1°F
64.4°F
96%
WNW 10.5 mph
14.5 mph
64.4°F
61.8°F
0 in
100%
6 mi
997 mbar
0.7

Five Day Weather Forecast

Patchy rain nearby
Tue
H: 67°F
L: 51°F
Partly Cloudy
Wed
H: 63°F
L: 52°F
Sunny
Thu
H: 73°F
L: 50°F
Patchy rain nearby
Fri
H: 73°F
L: 58°F
Sunny
Sat
H: 81°F
L: 58°F

Air Quality

AQI: 1 - Good
PM2.5: 5.5 μg/m3
PM10: 5.6 μg/m3
Carbon Monoxide: 120 μg/m3
Nitrogen Dioxide: 2 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 76 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

Small Craft Advisory issued July 20 at 9:58PM EDT until July 22 at 11:00PM EDT by NWS Gaylord MI

Effective: Mon July 20, 2026, 9:58 PM
Expires: Tue July 21, 2026, 6:00 AM

* WHAT...Highest gusts up to 30 kts from the northwest and highest waves around 10 feet. * WHERE...Whitefish Bay (U. S. Portion)/Whitefish Point to Point Iroquois MI and St. Marys River Point Iroquois to E. Potagannissing Bay. * WHEN...Until 11 PM EDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 21 at 2:15AM EDT until July 22 at 11:00PM EDT by NWS Gaylord MI

Effective: Tue July 21, 2026, 2:15 AM
Expires: Tue July 21, 2026, 10:15 AM

* WHAT...Highest gusts up to 30 kts from the northwest and highest waves around 10 feet. * WHERE...Whitefish Bay (U. S. Portion)/Whitefish Point to Point Iroquois MI and St. Marys River Point Iroquois to E. Potagannissing Bay. * WHEN...Until 11 PM EDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Tuesday, July 21, 2026

Weather Forecast

Patchy rain nearby
67.1°F
50.9°F
61.9°F
89%
0.02 in
54%
0%
20.6 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

Partly Cloudy
63.2°F
51.7°F
56.8°F
67%
0 in
17%
0%
17.7 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: 1:44 PM
Sunset: 9:20 PM
Daylight: 15 hrs 13 mins
Moonrise: 3:58 PM
Moon Transit: 8:29 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
7:59 PM - 10:29 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
72.9°F
49.7°F
61.5°F
64%
0 in
5%
0%
9.2 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: 1:44 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

Patchy rain nearby
73.3°F
57.8°F
65.3°F
83%
0.08 in
64%
0%
8.9 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: 1:44 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

Sunny
81.4°F
57.7°F
68.2°F
71%
0 in
8%
0%
13.2 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: 1:44 PM
Sunset: 9:17 PM
Daylight: 15 hrs 6 mins
Moonrise: 7:08 PM
Moon Transit: 10:58 PM
Moonset: 2:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

10:48 AM - 1:18 PM
12:00 AM - 12:00 AM

Minor Periods

6:38 PM - 8:08 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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