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

Current Water Temperature

59.9°F

Measurement Time: Sunday, July 19, 2026, 10:30 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

66°F
Clear
Clear
66°F
65.1°F
70%
SW 3.8 mph
8 mph
65.1°F
49.2°F
0 in
0%
9 mi
1014 mbar
0

Five Day Weather Forecast

Sunny
Sun
H: 77°F
L: 49°F
Sunny
Mon
H: 80°F
L: 55°F
Patchy rain nearby
Tue
H: 66°F
L: 53°F
Sunny
Wed
H: 67°F
L: 49°F
Sunny
Thu
H: 78°F
L: 51°F

Air Quality

AQI: 1 - Good
PM2.5: 24.2 μg/m3
PM10: 24.4 μg/m3
Carbon Monoxide: 424 μg/m3
Nitrogen Dioxide: 2.9 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 79 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

Small Craft Advisory issued July 19 at 2:43PM EDT until July 20 at 11:00PM EDT by NWS Marquette MI

Effective: Sun July 19, 2026, 2:43 PM
Expires: Mon July 20, 2026, 2:45 AM

* WHAT...For the Dense Smoke Advisory, dense smoke will reduce visibility to less than one nautical mile. For the Small Craft Advisory, south winds 15 to 20 kt with gusts up to 25 kt and waves 1 to 3 ft expected. * WHERE...Grand Marais to Whitefish Point MI. * WHEN...For the Dense Smoke Advisory, until 8 AM EDT Monday. For the Small Craft Advisory, from 2 PM to 11 PM EDT Monday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.


Dense Smoke Advisory issued July 19 at 2:43PM EDT until July 20 at 8:00AM EDT by NWS Marquette MI

Effective: Sun July 19, 2026, 2:43 PM
Expires: Mon July 20, 2026, 2:45 AM

* WHAT...For the Dense Smoke Advisory, dense smoke will reduce visibility to less than one nautical mile. For the Small Craft Advisory, south winds 15 to 20 kt with gusts up to 25 kt and waves 1 to 3 ft expected. * WHERE...Grand Marais to Whitefish Point MI. * WHEN...For the Dense Smoke Advisory, until 8 AM EDT Monday. For the Small Craft Advisory, from 2 PM to 11 PM EDT Monday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.
Sunday, July 19, 2026

Weather Forecast

Sunny
76.6°F
49.1°F
62.5°F
67%
0 in
6%
0%
7.4 mph
7.4


Air Quality

AQI: 2 - Moderate
PM2.5: 20.39 μg/m3
PM10: 20.65 μg/m3
Carbon Monoxide: 295.17 μg/m3
Nitrogen Dioxide: 2.25 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 71.46 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

Sunny
80.1°F
55.4°F
65.7°F
80%
0.28 in
75%
0%
18.1 mph
5.7


Air Quality

AQI: 2 - Moderate
PM2.5: 27.1 μg/m3
PM10: 27.28 μg/m3
Carbon Monoxide: 262.42 μg/m3
Nitrogen Dioxide: 1.89 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 115 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: 6:58 PM
Moonset: 12:50 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

6:54 AM - 9:24 AM
6:28 PM - 8:58 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
65.7°F
53.1°F
57.7°F
89%
0.04 in
70%
0%
16.8 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 6.3 μg/m3
PM10: 6.39 μg/m3
Carbon Monoxide: 214.96 μg/m3
Nitrogen Dioxide: 2.07 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 91.08 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

Sunny
66.7°F
49.2°F
57.9°F
66%
0 in
5%
0%
14.1 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 4.67 μg/m3
PM10: 4.86 μg/m3
Carbon Monoxide: 111.06 μg/m3
Nitrogen Dioxide: 1.52 μg/m3
Sulphur Dioxide: 0.51 μg/m3
Ozone: 63.96 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 1:43 PM
Sunset: 9:20 PM
Daylight: 15 hrs 13 mins
Moonrise: 3:58 PM
Moon Transit: 8:28 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
7:58 PM - 10:28 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
78.3°F
51.3°F
64.4°F
65%
0.02 in
36%
0%
9.6 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 3.87 μg/m3
PM10: 4.04 μg/m3
Carbon Monoxide: 131.33 μg/m3
Nitrogen Dioxide: 3.34 μg/m3
Sulphur Dioxide: 0.91 μg/m3
Ozone: 57.33 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:43 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

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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