Chemong Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Chemong Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Chemong Lake today is 19.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| SEP 14 | 20.8°C | 20.0°C | |
| SEP 15 | 21.3°C | 20.0°C | |
| SEP 16 | 20.7°C | 20.0°C | |
| SEP 17 | 19.6°C | 20.0°C | |
| SEP 18 | 20.4°C | 20.0°C | |
| SEP 19 | 19.9°C | 20.0°C | |
| SEP 20 | 19.7°C | 20.0°C | |
| SEP 21 | 19.6°C | 20.0°C | |
| SEP 22 | 20.0°C | 19.6°C | |
| SEP 23 | 20.0°C | 19.6°C | |
| SEP 24 | 20.0°C | 19.7°C | |
| SEP 25 | 20.0°C | 19.7°C | |
| SEP 26 | 20.0°C | 19.7°C | |
| SEP 27 | 20.0°C | 19.7°C | |
| SEP 28 | 20.0°C | 19.7°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 | 3°C | 8°C | 12°C |
| May | 6°C | 11°C | 16°C |
| June | 13°C | 17°C | 20°C |
| July | 18°C | 24°C | 29°C |
| August | 18°C | 22°C | 25°C |
| September | 18°C | 20°C | 22°C |
| October | 13°C | 16°C | 18°C |
| November | 3°C | 9°C | 14°C |
| December | 0°C | 4°C | 7°C |
Chemong Lake: Water Temperature by Location
Chemong Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Chemong Lake, located just northwest of Peterborough in the Kawartha Lakes region of Ontario, is a shallow freshwater lake connected to the Trent–Severn Waterway. Its water temperature varies throughout the year, influenced by seasonal air changes and its modest depth. In winter, the lake typically freezes, with water temperatures close to 0 °C (32 °F). During spring, melting ice and inflowing rivers keep the lake cool, averaging 5–10 °C (41–50 °F). By midsummer, the surface warms quickly, often reaching 20–25 °C (68–77 °F) in calm, sunny conditions, while deeper areas remain cooler. In autumn, the water cools again to around 10–15 °C (50–59 °F) as the air temperature drops and the lake begins to mix.
Swimming in Chemong Lake is popular during the summer months, from late June through early September, when the water reaches its most comfortable temperatures. The lake’s shallow bays warm rapidly, creating ideal conditions for families and recreational swimmers. Public access points and nearby parks around Bridgenorth and Ennismore offer areas suitable for swimming and water sports. However, swimmers should be cautious of aquatic vegetation and boat traffic, especially in narrow channels. Outside the summer season, the lake’s water becomes too cold for safe swimming but remains a favorite destination for boating, fishing, and lakeside relaxation.