Stony Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Stony Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Stony Lake today is 24.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| AUG 4 | 22.5°C | 22.0°C | |
| AUG 5 | 22.7°C | 22.0°C | |
| AUG 6 | 22.7°C | 22.0°C | |
| AUG 7 | 23.0°C | 22.0°C | |
| AUG 8 | 24.0°C | 22.0°C | |
| AUG 9 | 23.9°C | 22.0°C | |
| AUG 10 | 23.7°C | 22.0°C | |
| AUG 11 | 24.2°C | 22.0°C | |
| AUG 12 | 22.0°C | 24.1°C | |
| AUG 13 | 22.0°C | 24.0°C | |
| AUG 14 | 22.0°C | 23.9°C | |
| AUG 15 | 22.0°C | 23.8°C | |
| AUG 16 | 22.0°C | 23.7°C | |
| AUG 17 | 22.0°C | 23.5°C | |
| AUG 18 | 22.0°C | 23.4°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 0°C | 2°C | 4°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 2°C | 7°C | 12°C |
| May | 5°C | 11°C | 16°C |
| June | 11°C | 16°C | 20°C |
| July | 18°C | 24°C | 29°C |
| August | 19°C | 22°C | 25°C |
| September | 17°C | 20°C | 22°C |
| October | 13°C | 16°C | 18°C |
| November | 3°C | 9°C | 15°C |
| December | 1°C | 4°C | 7°C |
Stony Lake: Water Temperature by Location
Stony Lake: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
Stony Lake (sometimes spelled Stoney Lake), located in the Kawarthas region of Ontario, is a large, popular recreational lake whose temperature is characteristic of the area's cottage country. In the cold winter months, the lake freezes completely, with water temperatures near the freezing point, generally ranging from 0∘C to 5∘C (32∘F to 41∘F). During the peak summer season, the surface water warms significantly, with temperatures typically reaching a comfortable range for swimming, likely peaking between 20∘C and 25∘C (68∘F to 77∘F).
Swimming is widely permitted and popular throughout Stony Lake, particularly at the public access points like Quarry Bay Beach and Chandos Beach, which both feature roped-off swimming areas. These designated spots confirm swimming is an expected recreational activity, and water quality is periodically tested by the local health unit. However, the Township of North Kawartha clearly states that its municipal beaches on the lake are unsupervised, meaning there are no official lifeguards on duty. All swimming is strictly at one's own risk, and swimmers should exercise caution regarding boat traffic and the lake's many islands and shoals.