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Flathead Lake
Flathead Lake Current Water Temperature and Forecast
On this page, you will find comprehensive information about the water temperature in Flathead Lake, 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
35°F
TODAY
35°F
YESTERDAY
35°F
A WEEK AGO
As of today, the minimum water temperature in the Flathead Lake 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 Flathead Lake Over the Last 30 Days
Today the water temperature in Flathead Lake is lower than the same day in previous years. The water temperature range here in March is from 34°F to 43°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 Flathead Lake 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 |
|---|---|---|---|
| Mar 22 | 35°F | 38°F | |
| Mar 23 | 35°F | 38°F | |
| Mar 24 | 36°F | 38°F | |
| Mar 25 | 35°F | 38°F | |
| Mar 26 | 35°F | 38°F | |
| Mar 27 | 35°F | 38°F | |
| Mar 28 | 35°F | 38°F | |
| Mar 29 | 35°F | 38°F | |
| Mar 30 | 38°F | 36°F | |
| Mar 31 | 38°F | 36°F | |
| Apr 1 | 39°F | 36°F | |
| Apr 2 | 39°F | 36°F | |
| Apr 3 | 39°F | 36°F | |
| Apr 4 | 39°F | 37°F | |
| Apr 5 | 39°F | 37°F | |
| Apr 6 | 39°F | 37°F |
Water Temperature Ranges in Flathead Lake by Month
January
| Minimum | Average | Maximum |
|---|---|---|
| 32°F | 34°F | 39°F |
February
| Minimum | Average | Maximum |
|---|---|---|
| 32°F | 37°F | 41°F |
March
| Minimum | Average | Maximum |
|---|---|---|
| 34°F | 38°F | 43°F |
April
| Minimum | Average | Maximum |
|---|---|---|
| 34°F | 39°F | 43°F |
May
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 41°F | 45°F |
June
| Minimum | Average | Maximum |
|---|---|---|
| 55°F | 60°F | 64°F |
July
| Minimum | Average | Maximum |
|---|---|---|
| 61°F | 66°F | 70°F |
August
| Minimum | Average | Maximum |
|---|---|---|
| 68°F | 72°F | 77°F |
September
| Minimum | Average | Maximum |
|---|---|---|
| 59°F | 64°F | 68°F |
October
| Minimum | Average | Maximum |
|---|---|---|
| 50°F | 55°F | 59°F |
November
| Minimum | Average | Maximum |
|---|---|---|
| 39°F | 43°F | 48°F |
December
| Minimum | Average | Maximum |
|---|---|---|
| 32°F | 36°F | 41°F |
Monthly Water Temperature Histogram for Flathead Lake
Known Beaches in the Area of Flathead Lake?
Yellow Bay
Yellow Bay is a 3-stars sandy beach, located in a 7 km (4 miles) radius of Flathead Lake. There is parking. There are cafés. Yellow Bay is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
West Shore / Flathead Lake State Park
West Shore / Flathead Lake State Park is a 2-stars sandy beach, located in a 8 km (5 miles) radius of Flathead Lake. There is parking. There are restrooms.
Skeeko Bay
Skeeko Bay is a 1-stars sandy beach, located in a 10 km (6 miles) radius of Flathead Lake. Skeeko Bay is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish.
Flathead Lake Weather
MARCH 30
36°F / 50°F
slight snow showerrain: 26% | wind: 7 mph
MARCH 31
32°F / 52°F
overcastrain: 40% | wind: 4 mph
APRIL 1
36°F / 52°F
light drizzlerain: 40% | wind: 11 mph
APRIL 2
32°F / 46°F
light drizzlerain: 15% | wind: 11 mph
Water Temperature in Flathead Lake: General Trends and Swimming Opportunities
Flathead Lake is located in the state of Montana, in the counties of Flathead, Lake, at an elevation of 2887 feet (880 meters) above sea level.
Flathead Lake is a large lake. Its surface area is 191 sq mi (495 sq km). Lakes of this size can serve as important regional resources, providing drinking water and fish stocks.
The water temperature in Flathead Lake varies throughout the year, ranging from 32°F (0°C) in January to 77°F (25°C) in August. The average annual water temperature of the lake is 48°F (9°C). The average monthly water temperature in Flathead Lake exceeds 68 degrees Fahrenheit (20°C) only in August.
The nearest cities ans towns to Flathead Lake are: Lakeside, Bigfork, Polson, Somers, Pablo, Kalispell, Evergreen, Ronan in Montana.
Geographical Location of Flathead Lake
Frequently Asked Questions About Flathead Lake and its Water Temperatures
What is the current water temperature in Flathead Lake?
The water temperature today in Flathead Lake is 35°F (1.9°C).
What is the water temperature in Flathead Lake during the summer months?
The average water temperature in Flathead Lake during the summer months is typically between 60°F to 72°F (16°C to 22°C), and it can reach up to 77°F (25°C) at its warmest. However, in some years, the temperature may exceed this range.
What is the water temperature in Flathead Lake in May?
The average water temperature in Flathead Lake in May ranges from 37°F to 45°F (3°C to 7°C).
What is the water temperature in Flathead Lake in September?
The average water temperature in Flathead Lake in September is typically between 59°F to 68°F (15°C to 20°C).
Where is Flathead Lake located?
Flathead Lake is located in the United States in the state of Montana, in the counties of Flathead, Lake, at an elevation of 2887 feet (880 meters) above sea level. The surface area of the lake is 191.018 sq mi (494.73 sq km).
Is it possible to swim in Flathead Lake and what are the possibilities for this?
Yes, it is possible to swim in Flathead Lake, Montana. The lake offers public access points and swimming is common in summer when the water temperature is comfortable.
What are the coordinates of Flathead Lake?
Flathead Lake is located at coordinates 47.8910°N 114.1240°W.
Is Lake Flathead Lake a popular vacation spot among Americans?
Flathead Lake is among the top 1,000 most popular lakes in the United States, which is impressive considering there are tens of thousands of lakes in the country.