Sarnia Water Temperature

(Today) 2021

6.3°C / 43.4°F

Current weather

-2°C / 29°F
(overcast clouds)

Partly cloudy

Wind

1 mph

Humidity

73%


The measurements for the water temperature in Sarnia, Ontario 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.

Monthly average water temp

Monthly average max / min water temperatures

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

Sarnia average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Sarnia
  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 Sarnia

WedThuFriSatSunMonTue
  • Low 6:11am
    (-0.09m)
  • High 11:38am
    (0.83m)
  • Low 6:14pm
    (-0.06m)
  • High 11:56pm
    (0.92m)
  • Low 7:04am
    (-0.07m)
  • High 12:36pm
    (0.81m)
  • Low 7:13pm
    (-0.04m)
  • High 12:57am
    (0.87m)
  • Low 7:57am
    (-0.05m)
  • High 1:36pm
    (0.8m)
  • Low 8:13pm
    (-0.02m)
  • High 2:00am
    (0.83m)
  • Low 8:50am
    (-0.04m)
  • High 2:36pm
    (0.8m)
  • Low 9:14pm
    (-0.01m)
  • High 3:03am
    (0.8m)
  • Low 9:42am
    (-0.03m)
  • High 3:35pm
    (0.81m)
  • Low 10:14pm
    (-0m)
  • High 4:02am
    (0.78m)
  • Low 10:32am
    (-0.02m)
  • High 4:31pm
    (0.83m)
  • Low 11:12pm
    (-0.01m)
  • High 4:57am
    (0.76m)
  • Low 11:21am
    (-0.02m)
  • High 5:22pm
    (0.85m)
7 day tide times for Sarnia

*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.