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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
8.5°C
TODAY
7.8°C
YESTERDAY
4.9°C
A WEEK AGO
As of today, the minimum water temperature in the Lake Superior ranges less than 41°F (5°C). Such water is extremely cold and not recommended for swimming without proper preparation. In these conditions, the risk of hypothermia is very high, and prolonged exposure to the water can be hazardous to your health. If you decide to swim, it is important to have the appropriate gear, such as a wetsuit. Typically, only experienced swimmers or those who practice winter swimming venture into such waters.
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 May is from 2°C to 9°C. 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
| Date | Current | Average | Forecast |
|---|---|---|---|
| May 2 | 4.9°C | 5.5°C | |
| May 3 | 6.0°C | 5.5°C | |
| May 4 | 5.6°C | 5.5°C | |
| May 5 | 5.7°C | 5.5°C | |
| May 6 | 6.3°C | 5.5°C | |
| May 7 | 7.6°C | 5.5°C | |
| May 8 | 7.8°C | 5.5°C | |
| May 9 | 8.5°C | 5.5°C | |
| May 10 | 5.5°C | 8.3°C | |
| May 11 | 5.5°C | 8.1°C | |
| May 12 | 5.5°C | 7.9°C | |
| May 13 | 5.5°C | 7.8°C | |
| May 14 | 5.5°C | 7.7°C | |
| May 15 | 5.5°C | 7.6°C | |
| May 16 | 5.5°C | 7.5°C | |
| May 17 | 5.5°C | 7.4°C |
Water Temperature Ranges in Lake Superior by Month
January
| Minimum | Average | Maximum |
|---|---|---|
| 0°C | 2°C | 4°C |
February
| Minimum | Average | Maximum |
|---|---|---|
| -1°C | 1°C | 3°C |
March
| Minimum | Average | Maximum |
|---|---|---|
| -1°C | 1°C | 3°C |
April
| Minimum | Average | Maximum |
|---|---|---|
| 0°C | 3°C | 6°C |
May
| Minimum | Average | Maximum |
|---|---|---|
| 2°C | 5.5°C | 9°C |
June
| Minimum | Average | Maximum |
|---|---|---|
| 5°C | 9°C | 13°C |
July
| Minimum | Average | Maximum |
|---|---|---|
| 12°C | 16°C | 20°C |
August
| Minimum | Average | Maximum |
|---|---|---|
| 14°C | 17.5°C | 21°C |
September
| Minimum | Average | Maximum |
|---|---|---|
| 11°C | 15°C | 19°C |
October
| Minimum | Average | Maximum |
|---|---|---|
| 6°C | 12°C | 18°C |
November
| Minimum | Average | Maximum |
|---|---|---|
| 3°C | 7.5°C | 12°C |
December
| Minimum | Average | Maximum |
|---|---|---|
| 0°C | 5.5°C | 11°C |
Monthly Water Temperature Histogram for Lake Superior
Water Temperature in Cities and Towns on Lake Superior
Lake Superior Weather
MAY 10
1°C / 5°C
overcastrain: 8% | wind: 38 km/h
MAY 11
2°C / 7°C
overcastrain: 8% | wind: 41 km/h
MAY 12
6°C / 9°C
overcastrain: 7% | wind: 39 km/h
MAY 13
5°C / 10°C
overcastrain: 2% | wind: 32 km/h
MAY 14
4°C / 7°C
fograin: 4% | wind: 36 km/h
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 40°F (4.3°C) to 53°F (11.4°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.