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Thunder Bay

Thunder Bay

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Water Temperature in Thunder Bay in Lake Superior: Current and Forecast

On this page, you will find comprehensive information about the water temperature in Thunder Bay 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 Water Temperature in Thunder Bay

64°F

TODAY

64°F

YESTERDAY

65°F

A WEEK AGO

As of today, the minimum water temperature in Thunder Bay ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people.

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 in Thunder Bay Over the Last 30 Days

Today the water temperature in Thunder Bay is higher than the same day in previous years. The water temperature range here in August is from 57°F to 70°F. The water temperature has decreased over the past 7 days but has increased over the past month.

The forecasted water temperature values for Thunder Bay 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.

Table of Daily Water Temperature Data

DateCurrentAverageForecast
Aug 1465°F64°F
Aug 1565°F64°F
Aug 1664°F64°F
Aug 1764°F64°F
Aug 1864°F64°F
Aug 1964°F64°F
Aug 2064°F64°F
Aug 2164°F64°F
Aug 2264°F64°F
Aug 2364°F64°F
Aug 2464°F64°F
Aug 2564°F64°F
Aug 2664°F64°F
Aug 2764°F64°F
Aug 2864°F64°F
Aug 2964°F64°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 Thunder Bay by Month

January

MinimumAverageMaximum
32°F36°F39°F

February

MinimumAverageMaximum
30°F34°F37°F

March

MinimumAverageMaximum
30°F34°F37°F

April

MinimumAverageMaximum
32°F36°F39°F

May

MinimumAverageMaximum
34°F43°F52°F

June

MinimumAverageMaximum
41°F51°F61°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 in Thunder Bay

Known Beaches in the Area of Thunder Bay?

Boulevard Lake

Boulevard Lake is a 1-stars pebble beach, located in a 7 km (4 miles) radius of Thunder Bay. There are restrooms.

Thunder Bay Weather

AUGUST 21

57°F / 81°F
overcast

rain: 6% | wind: 10 mph

AUGUST 22

64°F / 81°F
slight rain showers

rain: 31% | wind: 17 mph

AUGUST 23

55°F / 72°F
overcast

rain: 19% | wind: 18 mph

AUGUST 24

50°F / 55°F
overcast

rain: 19% | wind: 19 mph

Water Temperature in Thunder Bay: General Trends and Swimming Opportunities

Thunder Bay, located on the northwestern shore of Lake Superior, offers a beautiful but much colder swimming experience compared to other lakes in Ontario. The water temperature in Lake Superior near Thunder Bay can be quite chilly, even during the summer. During the warmer months, the water typically ranges from 50°F to 60°F (10°C to 15°C), which may feel brisk to swimmers. While it is swimmable, it can be a shock to the system for those who are not accustomed to colder waters. Many locals enjoy a quick dip, but the lake's cold temperatures may limit extended swimming sessions for most.

Despite the chilly water, Thunder Bay is known for its stunning beaches, such as the popular Sandy Beach and Boulevard Lake, which draw visitors for both relaxation and water activities. Although swimming is less common due to the cold temperatures, other activities such as kayaking, paddleboarding, and boating are quite popular. Lake Superior’s size and depth contribute to its colder water year-round, which is why it's essential to be prepared for lower temperatures if planning to swim or enjoy water sports.

In the winter months, the water temperature in Lake Superior around Thunder Bay drops further, often reaching around 32°F (0°C), freezing over in some areas. Swimming during this time is not recommended. However, during the summer, those who brave the cold waters are often rewarded with peaceful, scenic surroundings and the opportunity to cool off in one of the largest and most beautiful freshwater lakes in the world.

Geographical Location of Thunder Bay

Frequently Asked Questions About Thunder Bay and its Water Temperatures

What is the current water temperature in Thunder Bay?

The water temperature today in Thunder Bay is 64°F (17.9°C).

What is the water temperature in Thunder Bay during the summer months?

The average water temperature in Thunder Bay 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 Thunder Bay in May?

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

What is the water temperature in Thunder Bay in September?

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

Is it possible to swim in the Lake Superior in Thunder Bay, and what are the available options for doing so?

Yes, it is possible to swim in Lake Superior in Thunder Bay. You can go to local beaches like Chippewa Park Beach, or by boating to less crowded areas.