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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
40°F
TODAY
38°F
YESTERDAY
34°F
A WEEK AGO
As of today, the minimum water temperature in Thunder Bay 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 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 May is from 34°F to 45°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 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
| Date | Current | Average | Forecast |
|---|---|---|---|
| May 2 | 34°F | 39°F | |
| May 3 | 34°F | 39°F | |
| May 4 | 34°F | 39°F | |
| May 5 | 38°F | 39°F | |
| May 6 | 38°F | 39°F | |
| May 7 | 38°F | 39°F | |
| May 8 | 38°F | 39°F | |
| May 9 | 40°F | 39°F | |
| May 10 | 39°F | 40°F | |
| May 11 | 39°F | 40°F | |
| May 12 | 39°F | 40°F | |
| May 13 | 39°F | 40°F | |
| May 14 | 39°F | 40°F | |
| May 15 | 39°F | 40°F | |
| May 16 | 39°F | 40°F | |
| May 17 | 39°F | 40°F |
Water Temperature Ranges in Thunder Bay by Month
January
| Minimum | Average | Maximum |
|---|---|---|
| 32°F | 36°F | 39°F |
February
| Minimum | Average | Maximum |
|---|---|---|
| 30°F | 34°F | 37°F |
March
| Minimum | Average | Maximum |
|---|---|---|
| 30°F | 34°F | 37°F |
April
| Minimum | Average | Maximum |
|---|---|---|
| 32°F | 36°F | 39°F |
May
| Minimum | Average | Maximum |
|---|---|---|
| 34°F | 39°F | 45°F |
June
| Minimum | Average | Maximum |
|---|---|---|
| 41°F | 48°F | 55°F |
July
| Minimum | Average | Maximum |
|---|---|---|
| 54°F | 61°F | 68°F |
August
| Minimum | Average | Maximum |
|---|---|---|
| 57°F | 64°F | 70°F |
September
| Minimum | Average | Maximum |
|---|---|---|
| 52°F | 59°F | 66°F |
October
| Minimum | Average | Maximum |
|---|---|---|
| 43°F | 54°F | 64°F |
November
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 46°F | 54°F |
December
| Minimum | Average | Maximum |
|---|---|---|
| 32°F | 42°F | 52°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
MAY 10
39°F / 75°F
overcastrain: 1% | wind: 11 mph
MAY 11
39°F / 73°F
light drizzlerain: 12% | wind: 13 mph
MAY 12
64°F / 79°F
overcastrain: 9% | wind: 17 mph
MAY 13
59°F / 75°F
fograin: 2% | wind: 16 mph
MAY 14
48°F / 63°F
fograin: 6% | wind: 8 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 40°F (4.3°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.