Forecasts & current water temp

Lake Superior Water Temperature

Lake Superior is a large freshwater lake situated in North America, with two hundred rivers running into it, making it the point where all the fresh waters from across North America meet.

During the summer season, the region around Lake Superior experiences the highest temperatures. Ontario can be accessed via an airport, which allows international travelers to reach the nearby Canadian regions. Lake Superior can be most conveniently reached by car and then further explored on foot. Additionally, tourists in the area have the option to participate in one of the numerous specialized guided tours available.

The best times to visit are September, August, July, and June. The climate is described as a warm-summer humid continental climate. In February, the average air temperature is 16.3°F / -8.7°C, making it the coldest month. The warmest month of the year is August, with an average air temperature of 66.9°F / 19.4°C. December has the highest amount of rainfall, with 3.4in / 87mm. On the other hand, May is the driest month, with only 0.2in / 4.1mm of rainfall. March is the coldest month, with an average water temperature of 32.4°F / 0.2°C. In contrast, August has the highest water temperature at 65.1°F / 18.4°C and is in close proximity to the Great Lakes. Lake Superior is a town located nearby.

Lake Superior water temperature by month

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

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 highest water temperature usually reached in August is approximately 65.1°F / 18.4°C. On average, the lowest water temperature in March is 32.4°F / 0.2°C.

In the summer, it is possible to swim in the lake and enjoy the refreshing water, which reaches a temperature of eighty degrees Fahrenheit. However, it is important to note that the water can be quite cold, making it a bracing experience. In the winter, the water can become extremely cold, reaching temperatures as low as thirty degrees below zero. On average, the temperature of the lake water remains at a superior level of forty degrees Fahrenheit throughout the year.

Lake Superior weather today & 14-day weather forecast

Date
Weather
Max. F

Min. F
Max. C

Min. C
Windspeed

Windir.
Precip.

Rainrisk
Rel. Humidity
Jul. 17

Scattered clouds


65
°F

55°F

19
°C

13°C
3mph (5km/h)

west-northwest
0in (0mm)

20 %
78%
Jul. 18

Broken clouds


66
°F

55°F

19
°C

13°C
1mph (2km/h)

south-southeast
0in (0mm)

10 %
83%
Jul. 19

Thunderstorm with rain


71
°F

54°F

22
°C

12°C
1mph (2km/h)

south-southeast
1in (15mm)

85 %
86%
Jul. 20

Moderate rain


66
°F

60°F

19
°C

15°C
3mph (5km/h)

west
0in (11mm)

85 %
90%
Jul. 21

Few clouds


68
°F

60°F

20
°C

15°C
3mph (6km/h)

north-northwest
0in (0mm)

20 %
78%
Jul. 22

Few clouds


74
°F

58°F

23
°C

15°C
2mph (3km/h)

south
0in (1mm)

30 %
72%
Jul. 23

Heavy rain


69
°F

61°F

20
°C

16°C
1mph (2km/h)

south
1in (15mm)

85 %
85%

Date
Weather
Max. F

Min. F
Max. C

Min. C
Windspeed

Windir.
Precip.

Rainrisk
Rel. Humidity
Jul. 24

Scattered clouds


71
°F

60°F

22
°C

16°C
2mph (3km/h)

southeast
0in (0mm)

20 %
86%
Jul. 25

Thunderstorm with heavy rain


80
°F

65°F

27
°C

18°C
3mph (5km/h)

southwest
1in (21mm)

90 %
80%
Jul. 26

Few clouds


67
°F

62°F

20
°C

17°C
3mph (4km/h)

northwest
0in (0mm)

20 %
80%
Jul. 27

Clear Sky


70
°F

61°F

21
°C

16°C
2mph (3km/h)

southwest
0in (0mm)

0 %
69%
Jul. 28

Clear Sky


82
°F

62°F

28
°C

17°C
3mph (5km/h)

south
0in (0mm)

0 %
58%
Jul. 29

Broken clouds


74
°F

65°F

23
°C

18°C
3mph (4km/h)

south
0in (1mm)

30 %
69%
Jul. 30

Scattered clouds


65
°F

57°F

18
°C

14°C
1mph (2km/h)

east-northeast
0in (0mm)

0 %
81%
Jul. 31

Moderate rain


71
°F

60°F

21
°C

16°C
3mph (5km/h)

south-southeast
0in (5mm)

65 %
90%
Aug. 01

Overcast clouds


77
°F

62°F

25
°C

17°C
2mph (4km/h)

southwest
0in (0mm)

10 %
92%

Lake Superior weather by month / climate table

Max.

Temperature

°F

ø.

Temperature

°F

Min.

Temperature

(°F)

Precip.

(in)

Rainy Days

(d)

Rel. Humidity

(%)

January

28.8 19.9 10.6 2.4 10 75.3%

February

24.4 16.3 9 1.6 0 77.1%

March

34.7 23.7 11.5 0.2 0 79.9%

April

40.5 32.9 24.4 0.2 1 81.3%

May

52.3 42.3 36.1 0.2 0 82.6%

June

62.8 52.3 43.9 0.2 0 85.5%

July

70.9 63.5 55.6 0.2 0 81.5%

August

72 66.9 63 0.5 0 76.3%

September

72.3 62.2 52.2 1.2 5 74.4%

October

59.7 50 42.1 2.1 0 73.7%

November

47.3 39.4 31.6 1.7 10 74.2%

December

35.4 29.3 24.4 3.4 20 75.7%

Max.

Temperature

°C

ø.

Temperature

°C

Min.

Temperature

(°C)

Precip.

(mm)

Rainy Days

(d)

Rel. Humidity

(%)

January

-1.8 -6.7 -11.9 60.6 10 75.3%

February

-4.2 -8.7 -12.8 39.4 0 77.1%

March

1.5 -4.6 -11.4 5.8 0 79.9%

April

4.7 0.5 -4.2 6.1 1 81.3%

May

11.3 5.7 2.3 4.1 0 82.6%

June

17.1 11.3 6.6 4.9 0 85.5%

July

21.6 17.5 13.1 6.2 0 81.5%

August

22.2 19.4 17.2 11.6 0 76.3%

September

22.4 16.8 11.2 31.6 5 74.4%

October

15.4 10 5.6 53.6 0 73.7%

November

8.5 4.1 -0.2 44.1 10 74.2%

December

1.9 -1.5 -4.2 87 20 75.7%

August is the month with the highest temperature, the warmest average temperature is approximately 66.9°F / 19.4°C. February is the coldest with 16.3°F / -8.7°C average temperature. December has the highest amount of rainfall in a year with 3.4in / 87mm, while May is the month with the least amount of rainfall, measuring 0.2in / 4.1mm.

To experience the beauty of this breathtaking lake while remaining cozy and protected, consider renting or buying a dry suit. A helpful suggestion is to swim in the lake during the summer season if you prefer avoiding extreme cold temperatures.

Lake Superior Summary

Description Value
Warmest Month Water Temperature: August with 65.1°F / 18.4°C
Coldest Month Water Temperature: March with 32.4°F / 0.2°C
Warmest Month Air Temperature: August with 66.9°F / 19.4°C
Coldest Month Air Temperature: February with 16.3°F / -8.7°C
Wettest Month: December with 3.4in / 87mm
Driest Month: May with 0.2in / 4.1mm
Highest Humidity June with 85.5%
Lowest Humidity October with 73.7%
Best Time to Visit: June, July, August, September
Climate Classification Warm-summer humid continental climate

Breathtaking snowy sceneries will offer you a winter experience, but the most favorable period to explore Lake Superior is during the hottest month of July and the neighboring months of August and June to enjoy the warmest climate.

Activities & POI in Lake Superior

Type of Activity List
Attraction Half Built Bridge, Archery Course, SS Meteor

Image Attribution: Flickr CC 2.0 Lord