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

Current Water Temperature

68.2°F

Measurement Time: Saturday, July 18, 2026, 7:54 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

64°F
Mist
Mist
64°F
63°F
96%
NW 5.8 mph
12.4 mph
63°F
62.1°F
0 in
100%
1 mi
1004 mbar
0.1

Five Day Weather Forecast

Sunny
Sat
H: 78°F
L: 59°F
Sunny
Sun
H: 73°F
L: 50°F
Patchy rain nearby
Mon
H: 78°F
L: 56°F
Patchy rain nearby
Tue
H: 68°F
L: 50°F
Patchy rain nearby
Wed
H: 64°F
L: 49°F

Air Quality

AQI: 1 - Good
PM2.5: 9.4 μg/m3
PM10: 9.5 μg/m3
Carbon Monoxide: 141 μg/m3
Nitrogen Dioxide: 1.7 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 107 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:43 PM
Sunset: 9:24 PM
Daylight: 15 hrs 21 mins
Moonrise: 11:16 AM
Moon Transit: 5:32 PM
Moonset: 12:16 AM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

5:26 AM - 7:56 AM
5:02 PM - 7:32 PM

Minor Periods

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

Action Rating: 2 out of 5

Small Craft Advisory issued July 17 at 10:44PM EDT until July 19 at 5:00AM EDT by NWS Gaylord MI

Effective: Fri July 17, 2026, 10:44 PM
Expires: Sat July 18, 2026, 6:45 AM

* WHAT...Highest gusts up to 30 kts from the northwest and highest waves around 5 feet expected. * WHERE...Whitefish Bay (U. S. Portion)/Whitefish Point to Point Iroquois MI. * WHEN...From 5 AM Saturday to 5 AM EDT Sunday. * 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 18 at 3:04AM EDT until July 19 at 5:00AM EDT by NWS Gaylord MI

Effective: Sat July 18, 2026, 3:04 AM
Expires: Sat July 18, 2026, 11:15 AM

* WHAT...Highest gusts up to 30 kts from the northwest and highest waves around 5 feet expected. * WHERE...Whitefish Bay (U. S. Portion)/Whitefish Point to Point Iroquois MI. * WHEN...From 5 AM Saturday to 5 AM EDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.

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

Weather Forecast

Sunny
78.3°F
59.4°F
65.8°F
86%
0.74 in
83%
0%
13.9 mph
3.7


Air Quality

AQI: 2 - Moderate
PM2.5: 25.4 μg/m3
PM10: 25.78 μg/m3
Carbon Monoxide: 297.54 μg/m3
Nitrogen Dioxide: 1.63 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 98.25 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:43 PM
Sunset: 9:24 PM
Daylight: 15 hrs 21 mins
Moonrise: 11:16 AM
Moon Transit: 5:32 PM
Moonset: 12:16 AM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

5:26 AM - 7:56 AM
5:02 PM - 7:32 PM

Minor Periods

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

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
73.1°F
50.1°F
62.5°F
66%
0 in
6%
0%
6.5 mph
7.3


Air Quality

AQI: 2 - Moderate
PM2.5: 27.05 μg/m3
PM10: 27.25 μg/m3
Carbon Monoxide: 315 μg/m3
Nitrogen Dioxide: 2.65 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 75.58 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:43 PM
Sunset: 9:23 PM
Daylight: 15 hrs 19 mins
Moonrise: 12:29 AM
Moon Transit: 6:15 PM
Moonset: 12:33 AM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

6:10 AM - 8:40 AM
5:45 PM - 8:15 PM

Minor Periods

11:59 AM - 1:29 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, July 20, 2026

Weather Forecast

Patchy rain nearby
78.4°F
56.2°F
67°F
81%
0.32 in
78%
0%
18.1 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 14.5 μg/m3
PM10: 14.62 μg/m3
Carbon Monoxide: 214.42 μg/m3
Nitrogen Dioxide: 1.98 μg/m3
Sulphur Dioxide: 0.64 μg/m3
Ozone: 105.13 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:43 PM
Sunset: 9:22 PM
Daylight: 15 hrs 17 mins
Moonrise: 1:39 PM
Moon Transit: 7:00 PM
Moonset: 12:50 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

6:53 AM - 9:23 AM
6:30 PM - 9:00 PM

Minor Periods

1:09 PM - 2:39 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, July 21, 2026

Weather Forecast

Patchy rain nearby
68.3°F
50.3°F
59.2°F
87%
0.09 in
76%
0%
17.4 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 6.03 μg/m3
PM10: 6.15 μg/m3
Carbon Monoxide: 268.38 μg/m3
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 0.53 μg/m3
Ozone: 90.67 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

Patchy rain nearby
63.9°F
48.9°F
55.4°F
77%
0.09 in
64%
0%
17.9 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 1.79 μg/m3
PM10: 1.84 μg/m3
Carbon Monoxide: 125 μg/m3
Nitrogen Dioxide: 1.11 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 62.44 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

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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