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

Current Water Temperature

59.5°F

Measurement Time: Monday, July 27, 2026, 3:48 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

63.9°F
Clear
Clear
54.3°F
63.9°F
91%
SE 4 mph
8.5 mph
63.9°F
61.3°F
0 in
6%
1 mi
1008 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 83°F
L: 61°F
Sunny
Tue
H: 75°F
L: 56°F
Sunny
Wed
H: 76°F
L: 52°F
Sunny
Thu
H: 84°F
L: 57°F
Sunny
Fri
H: 76°F
L: 61°F

Air Quality

AQI: 1 - Good
PM2.5: 20.4 μg/m3
PM10: 21.1 μg/m3
Carbon Monoxide: 147 μg/m3
Nitrogen Dioxide: 2.8 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 86 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:43 PM
Sunset: 9:14 PM
Daylight: 15 hrs 2 mins
Moonrise: 8:35 PM
Moon Transit: 12:00 AM
Moonset: 3:45 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:31 AM - 3:01 PM

Minor Periods

8:05 PM - 9:35 PM
3:15 AM - 4:45 AM

Action Rating: 3 out of 5

squall warning in effect

Effective: Sun July 26, 2026, 11:16 PM
Expires: Mon July 27, 2026, 3:16 AM

Squalls with wind gusts up to 35 knots, frequent lightning, hail of 2 to 4 centimetres and poor to very poor visibility in thunderstorms heavy at times are expected or occurring in the area. Thunderstorms over eastern Lake Superior will move across Whitefish Bay near midnight. ### Poor to very poor visibility may contribute to voyage delays and make marine navigation hazardous. Large hail can damage vessels and cause injury. Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Vessels without lightning protection should make their way to shore immediately. If you must travel, keep others informed of your planned route and carry appropriate safety equipment including a GPS and satellite phone or marine radio.


squall warning in effect

Effective: Sun July 26, 2026, 11:16 PM
Expires: Mon July 27, 2026, 3:16 AM

Squalls with wind gusts up to 35 knots, frequent lightning, hail of 2 to 4 centimetres and poor to very poor visibility in thunderstorms heavy at times are expected or occurring in the area. ### Poor to very poor visibility may contribute to voyage delays and make marine navigation hazardous. Large hail can damage vessels and cause injury. Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Vessels without lightning protection should make their way to shore immediately. If you must travel, keep others informed of your planned route and carry appropriate safety equipment including a GPS and satellite phone or marine radio.


Special Marine Warning issued July 26 at 11:30PM EDT until July 27 at 1:00AM EDT by NWS Gaylord MI

Effective: Sun July 26, 2026, 11:30 PM
Expires: Mon July 27, 2026, 1:00 AM

SMWAPX The National Weather Service in Gaylord has issued a * Special Marine Warning for... Whitefish Bay (U.S. Portion)/Whitefish Point to Point Iroquois MI... * Until 100 AM EDT. * At 1129 PM EDT, a severe thunderstorm was located 19 nm northwest of Whitefish Point, moving southeast at 25 knots. HAZARD...Wind gusts 34 knots or greater and large hail. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. Large hail could result in structural damage. * Locations impacted include... Naomikong Point, Salt Point, Whitefish Point, and Paradise.

Move to safe harbor until hazardous weather passes.


Severe Thunderstorm Warning issued July 27 at 12:04AM EDT until July 27 at 12:45AM EDT by NWS Gaylord MI

Effective: Mon July 27, 2026, 12:04 AM
Expires: Mon July 27, 2026, 12:45 AM

SVRAPX The National Weather Service in Gaylord has issued a * Severe Thunderstorm Warning for... Northwestern Chippewa County in eastern Upper Michigan... * Until 1245 AM EDT. * At 1203 AM EDT, a severe thunderstorm was located 12 miles north of Lower Tahquamenon Falls State Park, or 12 miles west of Whitefish Point, moving southeast at 40 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * This severe thunderstorm will be near... Whitefish Point around 1210 AM EDT. Paradise around 1215 AM EDT.

For your protection move to an interior room on the lowest floor of a building.


Special Marine Warning issued July 27 at 12:09AM EDT until July 27 at 12:45AM EDT by NWS Marquette MI

Effective: Mon July 27, 2026, 12:09 AM
Expires: Mon July 27, 2026, 12:45 AM

SMWMQT The National Weather Service in Marquette has issued a * Special Marine Warning for... Grand Marais to Whitefish Point MI... Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border... * Until 1245 AM EDT. * At 1209 AM EDT, a strong thunderstorm was located 11 nm northeast of Muskallonge State Park, or 17 nm west of Whitefish Point, moving southeast at 35 knots. HAZARD...Wind gusts 34 knots or greater and small hail. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * The strong thunderstorm will remain over mainly open waters.

Move to safe harbor until hazardous weather passes.


Monday, July 27, 2026

Weather Forecast

Patchy rain nearby
82.9°F
60.5°F
67°F
89%
0.38 in
86%
0%
7.4 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 15.43 μg/m3
PM10: 16.02 μg/m3
Carbon Monoxide: 152.88 μg/m3
Nitrogen Dioxide: 2.6 μg/m3
Sulphur Dioxide: 0.85 μg/m3
Ozone: 86.5 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:43 PM
Sunset: 9:14 PM
Daylight: 15 hrs 2 mins
Moonrise: 8:35 PM
Moon Transit: 12:00 AM
Moonset: 3:45 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:31 AM - 3:01 PM

Minor Periods

8:05 PM - 9:35 PM
3:15 AM - 4:45 AM

Action Rating: 3 out of 5

Tuesday, July 28, 2026

Weather Forecast

Sunny
75.1°F
56.2°F
65.1°F
71%
0 in
8%
0%
15.2 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 6.56 μg/m3
PM10: 6.76 μg/m3
Carbon Monoxide: 132.79 μg/m3
Nitrogen Dioxide: 1.65 μg/m3
Sulphur Dioxide: 0.54 μg/m3
Ozone: 59.21 μg/m3

Astronomical

Sunrise: 6:14 AM
Sun Transit: 1:43 PM
Sunset: 9:13 PM
Daylight: 14 hrs 59 mins
Moonrise: 9:06 PM
Moon Transit: 12:39 AM
Moonset: 4:50 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:09 AM - 2:39 AM
1:21 PM - 3:51 PM

Minor Periods

8:36 PM - 10:06 PM
4:20 AM - 5:50 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Sunny
76°F
52.3°F
63.8°F
60%
0 in
3%
0%
9.2 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 2.45 μg/m3
PM10: 2.58 μg/m3
Carbon Monoxide: 125.42 μg/m3
Nitrogen Dioxide: 2.38 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 59.54 μg/m3

Astronomical

Sunrise: 6:15 AM
Sun Transit: 1:43 PM
Sunset: 9:12 PM
Daylight: 14 hrs 57 mins
Moonrise: 9:31 PM
Moon Transit: 1:28 AM
Moonset: 5:58 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:58 AM - 3:28 AM
2:09 PM - 4:39 PM

Minor Periods

9:01 PM - 10:31 PM
5:28 AM - 6:58 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
84°F
57.4°F
69.8°F
62%
0 in
4%
0%
7.2 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 7.45 μg/m3
PM10: 7.74 μg/m3
Carbon Monoxide: 143.99 μg/m3
Nitrogen Dioxide: 4.58 μg/m3
Sulphur Dioxide: 1.51 μg/m3
Ozone: 69.88 μg/m3

Astronomical

Sunrise: 6:16 AM
Sun Transit: 1:43 PM
Sunset: 9:11 PM
Daylight: 14 hrs 54 mins
Moonrise: 9:51 PM
Moon Transit: 2:15 AM
Moonset: 7:09 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:45 AM - 4:15 AM
2:54 PM - 5:24 PM

Minor Periods

9:21 PM - 10:51 PM
6:39 AM - 8:09 AM

Action Rating: 5 out of 5

Friday, July 31, 2026

Weather Forecast

Sunny
75.7°F
60.8°F
68°F
72%
0.03 in
36%
0%
7.2 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 7.08 μg/m3
PM10: 7.32 μg/m3
Carbon Monoxide: 197.56 μg/m3
Nitrogen Dioxide: 5.62 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 56.78 μg/m3

Astronomical

Sunrise: 6:17 AM
Sun Transit: 1:43 PM
Sunset: 9:09 PM
Daylight: 14 hrs 52 mins
Moonrise: 10:09 PM
Moon Transit: 3:00 AM
Moonset: 8:19 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

2:30 AM - 5:00 AM
3:38 PM - 6:08 PM

Minor Periods

9:39 PM - 11:09 PM
7:49 AM - 9:19 AM

Action Rating: 4 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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