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Lake Superior

Lake Superior Current Water Temperature and Forecast

On this page, you will find comprehensive information about the water temperature in Lake Superior, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Current Lake Water Temperature Information

62°F

TODAY

62°F

YESTERDAY

56°F

A WEEK AGO

As of today, the minimum water temperature in the Lake Superior ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Analysis, Historical Data, and Forecast of Water Temperature

Water Temperature Chart for Lake Superior Over the Last 30 Days

Today the water temperature in Lake Superior is higher than the same day in previous years. The water temperature range here in July is from 54°F to 68°F. The water temperature is trending upward, and it has increased both over the past 30 days and the past week.

The forecasted water temperature values for Lake Superior are presented in the table below.

The actual water temperature values near the shore may differ by a few degrees from the stated values. For the development of the forecast, we use our own mathematical model that takes into account the current water temperature changes, historical data, and key weather trends, including wind strength and direction, and air temperature in each specific region.

Daily Water Temperature Chart

DateCurrentAverageForecast
Jul 256°F61°F
Jul 362°F61°F
Jul 461°F61°F
Jul 561°F61°F
Jul 661°F61°F
Jul 762°F61°F
Jul 862°F61°F
Jul 962°F61°F
Jul 1061°F62°F
Jul 1161°F62°F
Jul 1261°F62°F
Jul 1361°F62°F
Jul 1461°F62°F
Jul 1561°F62°F
Jul 1661°F62°F
Jul 1761°F62°F
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast

Water Temperature Ranges in Lake Superior by Month

January

MinimumAverageMaximum
32°F36°F39°F

February

MinimumAverageMaximum
30°F34°F37°F

March

MinimumAverageMaximum
30°F34°F37°F

April

MinimumAverageMaximum
32°F37°F43°F

May

MinimumAverageMaximum
36°F46°F55°F

June

MinimumAverageMaximum
41°F50°F59°F

July

MinimumAverageMaximum
54°F61°F68°F

August

MinimumAverageMaximum
57°F64°F70°F

September

MinimumAverageMaximum
52°F59°F66°F

October

MinimumAverageMaximum
43°F54°F64°F

November

MinimumAverageMaximum
37°F46°F54°F

December

MinimumAverageMaximum
32°F42°F52°F

Monthly Water Temperature Histogram for Lake Superior

Water Temperature in Cities and Towns on Lake Superior

Apostle Islands
United States (Wisconsin)
63°F
Ashland
United States (Wisconsin)
67°F
Baraga
United States (Michigan)
65°F
Munising
United States (Michigan)
70°F
L'Anse
United States (Michigan)
63°F
Harvey
United States (Michigan)
59°F
Canada (Ontario)
66°F

Lake Superior Weather

JULY 10

39°F / 45°F
fog

rain: 0% | wind: 11 mph

JULY 11

39°F / 45°F
fog

rain: 18% | wind: 13 mph

JULY 12

45°F / 50°F
dense intensity drizzle

rain: 35% | wind: 20 mph

JULY 13

43°F / 48°F
light drizzle

rain: 28% | wind: 19 mph

Water Temperature in Lake Superior: General Trends and Swimming Opportunities

Max. length 350 mi (560 km)
Max. width 160 mi (260 km)
Surface area 82,100 km2 (31,700 sq mi)
Average depth 483 ft (147 m)
Max. depth 1,333 ft (406 m)

Lake Superior, the largest and coldest of the Great Lakes, is a breathtaking freshwater expanse surrounded by rugged cliffs, dense forests, and picturesque shorelines. Its sheer size and depth mean that it holds a vast amount of cold water, which heavily influences its temperature and swimming conditions. While it offers incredible natural beauty and opportunities for outdoor activities, swimming in Lake Superior is an experience defined by its cool, invigorating waters.

Water temperatures in Lake Superior remain chilly for much of the year due to its depth and northern location. During the peak summer months, shallow coastal areas can warm to 60°F to 65°F (15°C to 18°C), but deeper sections of the lake often stay below 50°F (10°C), even in July and August. The cold water can be refreshing on a hot day, but it also limits how long most people are comfortable swimming. Wetsuits are common among swimmers venturing further from shore or engaging in longer water activities.

Swimming is possible at several beaches along the lake’s shoreline, including spots like Minnesota’s Park Point Beach or Michigan’s Little Presque Isle. The water is exceptionally clear, adding to its allure, but swimmers should always be cautious of hypothermia risks and sudden changes in weather. Lake Superior’s pristine, wild beauty and crisp waters make it a unique destination for those seeking an invigorating swim in a truly majestic setting.

Geographical Location of Lake Superior

Frequently Asked Questions About Lake Superior and its Water Temperatures

What is the current water temperature in Lake Superior?

The water temperature today in Lake Superior ranges from 59°F (14.8°C) to 70°F (20.9°C).

What is the water temperature in Lake Superior during the summer months?

The average water temperature in Lake Superior during the summer months is typically between 48°F to 64°F (9°C to 18°C), and it can reach up to 70°F (21°C) at its warmest. However, in some years, the temperature may exceed this range.

What is the water temperature in Lake Superior in May?

The average water temperature in Lake Superior in May ranges from 36°F to 45°F (2°C to 7°C).

What is the water temperature in Lake Superior in September?

The average water temperature in Lake Superior in September is typically between 52°F to 66°F (11°C to 19°C).

Where is Lake Superior located?

Lake Superior is located in North America, bordered by the U.S. states of Minnesota, Wisconsin, and Michigan, as well as the Canadian province of Ontario.

Is it possible to swim in Lake Superior and what are the possibilities for this?

Yes, it is possible to swim in Lake Superior, though the water is cold even in summer, and swimming is typically enjoyed at designated beaches and parks along its shoreline.

What are the coordinates of Lake Superior?

Lake Superior is located at coordinates 47.6950°N 87.2270°W.

What species of fish can be found in Lake Superior?

Lake Superior is home to species such as lake trout, yellow perch, smallmouth bass, northern pike, and whitefish.