Lake Superior Water Temperature

Lake Superior water temperature by month

  • °F
  • °C

°F

Great Lakes water temperature by month

Max. Water

Temperature (°F)

ø. Water

Temperature (°F)

Min. Water

Temperature (°F)

January

36.1 34.5 33.4

February

33.4 32.7 32.4

March

32.9 32.4 32.2

April

34.9 33.8 33.1

May

40.5 37 34.7

June

49.1 43.9 39.9

July

62.8 55.2 47.7

August

66.2 64.2 61.7

September

66 62.1 57.6

October

58.1 52.9 48.2

November

47.8 44.6 42.1

December

42.1 39.9 38.1

°C

Great Lakes water temperature by month

Max. Water

Temperature (°C)

ø. Water

Temperature (°C)

Min. Water

Temperature (°C)

January

2.3 1.4 0.8

February

0.8 0.4 0.2

March

0.5 0.2 0.1

April

1.6 1 0.6

May

4.7 2.8 1.5

June

9.5 6.6 4.4

July

17.1 12.9 8.7

August

19 17.9 16.5

September

18.9 16.7 14.2

October

14.5 11.6 9

November

8.8 7 5.6

December

5.6 4.4 3.4
The hottest water temperature typically reached in August with around 65.1°F / 18.4°C. The coldest in March with an average water temperature of 32.4°F / 0.2°C.

Tag » How Cold Is Lake Superior