Saint Clair Water Temperature

(Today) 2025

21.3°C / 70.3°F

The water will feel tepid. Swimming will be tolerable without a wetsuit, although it will take a little getting used to. If you intend to stay in the water for a while a 3/2mm wetsuit will be ideal.

*Live data from Algonac, MI: 19.5°C / 67.1°F

Current weather

18°C / 64°F
(clear sky)
Partly cloudy
Wind
0 mph
Humidity
74%

The measurements for the water temperature in Saint Clair, Michigan are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.

Water temp by month

Monthly average max / min water temperatures

The graph below shows the range of monthly Saint Clair water temperature derived from many years of historical sea surface temperature data.

Saint Clair average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Saint Clair
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -0.1 -0.3 -0.1 0.7 4 10.2 19.2 21.6 18.2 11.5 6.1 1.5
Max °C 2.9 0.9 1.3 5.9 11 21.4 25.6 24.9 23.4 19.4 12.9 7.2
Min °F 33 31.9 32.5 35.3 42 54.8 69.1 72.2 66.8 55.8 45.7 36.9
Max °F 36 33.1 33.8 40.5 49 66 75.5 75.5 72 63.7 52.5 42.6

The warmest water temperature is in August with an average around 73.8°F / 23.2°C. The coldest month is February with an average water temperature of 32.5°F / 0.3°C.

7 day tide forecast for Saint Clair

FriSatSunMonTueWedThu
  • High 4:25am
    (0.96m)
  • Low 11:07am
    (0.19m)
  • High 4:52pm
    (0.81m)
  • Low 10:47pm
    (0.15m)
  • High 5:15am
    (0.97m)
  • Low 12:02pm
    (0.19m)
  • High 5:46pm
    (0.8m)
  • Low 11:33pm
    (0.16m)
  • High 6:02am
    (0.97m)
  • Low 12:55pm
    (0.17m)
  • High 6:37pm
    (0.8m)
  • Low 12:24am
    (0.17m)
  • High 6:48am
    (0.98m)
  • Low 1:45pm
    (0.16m)
  • High 7:26pm
    (0.81m)
  • Low 1:16am
    (0.17m)
  • High 7:32am
    (0.98m)
  • Low 2:32pm
    (0.14m)
  • High 8:12pm
    (0.82m)
  • Low 2:07am
    (0.16m)
  • High 8:13am
    (0.99m)
  • Low 3:17pm
    (0.12m)
  • High 8:54pm
    (0.84m)
  • Low 2:56am
    (0.16m)
  • High 8:53am
    (1m)
  • Low 4:00pm
    (0.11m)
  • High 9:33pm
    (0.85m)
7 day tide times for Saint Clair

*These tide times are estimates based on the nearest accurate location (Chain Bridge, D.C.) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.