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Grand Lake St Marys
Grand Lake St Marys Current Water Temperature and Forecast
On this page, you will find comprehensive information about the water temperature in Grand Lake St Marys, 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
47°F
TODAY
45°F
YESTERDAY
43°F
A WEEK AGO
As of today, the minimum water temperature in the Grand Lake St Marys ranges from 47°F (8°C) to 50°F (10°C). This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing can be used.
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 Grand Lake St Marys Over the Last 30 Days
Today the water temperature in Grand Lake St Marys is higher than the same day in previous years. The water temperature range here in March is from 32°F to 46°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 Grand Lake St Marys 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 20 | 43°F | 39°F | |
| Mar 21 | 42°F | 39°F | |
| Mar 22 | 43°F | 39°F | |
| Mar 23 | 44°F | 39°F | |
| Mar 24 | 45°F | 39°F | |
| Mar 25 | 44°F | 39°F | |
| Mar 26 | 45°F | 39°F | |
| Mar 27 | 47°F | 39°F | |
| Mar 28 | 39°F | 46°F | |
| Mar 29 | 39°F | 46°F | |
| Mar 30 | 39°F | 46°F | |
| Mar 31 | 39°F | 45°F | |
| Apr 1 | 48°F | 45°F | |
| Apr 2 | 48°F | 46°F | |
| Apr 3 | 48°F | 46°F | |
| Apr 4 | 48°F | 46°F |
Water Temperature Ranges in Grand Lake St Marys by Month
January
| Minimum | Average | Maximum |
|---|---|---|
| 34°F | 39°F | 43°F |
February
| Minimum | Average | Maximum |
|---|---|---|
| 32°F | 36°F | 39°F |
March
| Minimum | Average | Maximum |
|---|---|---|
| 32°F | 39°F | 46°F |
April
| Minimum | Average | Maximum |
|---|---|---|
| 43°F | 48°F | 52°F |
May
| Minimum | Average | Maximum |
|---|---|---|
| 57°F | 62°F | 66°F |
June
| Minimum | Average | Maximum |
|---|---|---|
| 66°F | 71°F | 75°F |
July
| Minimum | Average | Maximum |
|---|---|---|
| 68°F | 73°F | 77°F |
August
| Minimum | Average | Maximum |
|---|---|---|
| 73°F | 78°F | 82°F |
September
| Minimum | Average | Maximum |
|---|---|---|
| 73°F | 78°F | 82°F |
October
| Minimum | Average | Maximum |
|---|---|---|
| 66°F | 70°F | 75°F |
November
| Minimum | Average | Maximum |
|---|---|---|
| 46°F | 50°F | 54°F |
December
| Minimum | Average | Maximum |
|---|---|---|
| 39°F | 44°F | 48°F |
Monthly Water Temperature Histogram for Grand Lake St Marys
Known Beaches in the Area of Grand Lake St Marys?
Dog Tale Beach
Dog Tale Beach is a 2-stars sandy beach, located in a 5 km (3 miles) radius of Grand Lake St Marys. There are restrooms. Dog Tale Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish.
Grand Lake St. Marys State Park
Grand Lake St. Marys State Park is a 1-stars sandy beach, located in a 5 km (3 miles) radius of Grand Lake St Marys.
Grand Lake St Marys Weather
MARCH 28
43°F / 70°F
moderate rain showersrain: 64% | wind: 22 mph
MARCH 29
57°F / 70°F
light drizzlerain: 41% | wind: 22 mph
MARCH 30
55°F / 64°F
dense intensity drizzlerain: 53% | wind: 16 mph
MARCH 31
30°F / 61°F
moderate snow fallrain: 51% | wind: 22 mph
APRIL 1
21°F / 32°F
moderate snow fallrain: 19% | wind: 20 mph
Water Temperature in Grand Lake St Marys: General Trends and Swimming Opportunities
Grand Lake St Marys is located in the state of Ohio, in the counties of Auglaize, Mercer, at an elevation of 862 feet (263 meters) above sea level.
Grand Lake St Marys is a medium lake. Its surface area is 20.1 sq mi (52.0 sq km). Typically versatile lakes with developed ecosystems; popular for water sports and tourism.
The water temperature in Grand Lake St Marys varies throughout the year, ranging from 32°F (0°C) in February to 82°F (28°C) in August. The average annual water temperature of the lake is 57°F (14°C). The months when the average water temperature in Grand Lake St Marys exceeds 68 degrees Fahrenheit (20°C) are June, July, August, September and October.
The nearest cities ans towns to Grand Lake St Marys are: Saint Marys, Celina, New Bremen, Coldwater, Minster, Saint Henry, Fort Loramie, Rockford, Spencerville, Wapakoneta in Ohio.
Geographical Location of Grand Lake St Marys
Nearby Lakes
Frequently Asked Questions About Grand Lake St Marys and its Water Temperatures
What is the current water temperature in Grand Lake St Marys?
The water temperature today in Grand Lake St Marys is 47°F (8.2°C).
What is the water temperature in Grand Lake St Marys during the summer months?
The average water temperature in Grand Lake St Marys during the summer months is typically between 71°F to 78°F (22°C to 26°C), and it can reach up to 82°F (28°C) at its warmest. However, in some years, the temperature may exceed this range.
What is the water temperature in Grand Lake St Marys in May?
The average water temperature in Grand Lake St Marys in May ranges from 57°F to 66°F (14°C to 19°C).
What is the water temperature in Grand Lake St Marys in September?
The average water temperature in Grand Lake St Marys in September is typically between 73°F to 82°F (23°C to 28°C).
Where is Grand Lake St Marys located?
Grand Lake St Marys is located in the United States in the state of Ohio, in the counties of Auglaize, Mercer, at an elevation of 862 feet (263 meters) above sea level. The surface area of the lake is 20.071 sq mi (51.98 sq km).
Is it possible to swim in Grand Lake St Marys and what are the possibilities for this?
Yes, you can swim in Grand Lake St Marys, Ohio, subject to water quality conditions. Opportunities include public swimming beaches and events like annual lake swim races.
What are the coordinates of Grand Lake St Marys?
Grand Lake St Marys is located at coordinates 40.5250°N 84.4760°W.
Is Lake Grand Lake St Marys a popular vacation spot among Americans?
Grand Lake St Marys is quite popular among Americans and ranks among the top 500 lakes in the United States.
What species of fish can be found in Grand Lake St Marys?
Grand Lake St Marys is home to fish species such as Bluegill (best caught in Spring, Summer), Channel catfish (Spring, Summer), Largemouth bass (Spring, Fall), Northern pike (Spring, Fall), Sauger (Spring, Fall), Saugeye (Spring, Fall), Yellow perch (Spring, Winter).