Jack Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Jack Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Jack Lake today is 15.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 |
|---|---|---|---|
| JUN 3 | 15.5°C | 15.0°C | |
| JUN 4 | 15.5°C | 15.0°C | |
| JUN 5 | 15.7°C | 15.0°C | |
| JUN 6 | 15.9°C | 15.0°C | |
| JUN 7 | 15.6°C | 15.0°C | |
| JUN 8 | 15.5°C | 15.0°C | |
| JUN 11 | 15.0°C | 15.8°C | |
| JUN 12 | 15.0°C | 15.7°C | |
| JUN 13 | 15.0°C | 15.7°C | |
| JUN 14 | 15.0°C | 15.6°C | |
| JUN 15 | 15.0°C | 15.6°C | |
| JUN 16 | 15.0°C | 15.6°C | |
| JUN 17 | 15.0°C | 15.5°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 | 1°C | 7°C | 12°C |
| May | 4°C | 10°C | 16°C |
| June | 10°C | 15°C | 20°C |
| July | 18°C | 24°C | 29°C |
| August | 20°C | 23°C | 25°C |
| September | 17°C | 20°C | 22°C |
| October | 13°C | 16°C | 19°C |
| November | 3°C | 9°C | 15°C |
| December | 0°C | 4°C | 7°C |
Jack Lake: Water Temperature by Location
Jack Lake: Weather Forecast
June 9
June 10
June 11
June 12
Location & Local Information
Jack Lake, a freshwater body located in the Kawartha region of Ontario, experiences the full range of temperatures typical of a Canadian inland lake. In the winter months, the lake freezes completely, with water temperatures dropping to the near-freezing range of 0∘C to 5∘C (32∘F to 41∘F). In the peak summer season, the lake warms significantly, with surface temperatures typically reaching a comfortable range for swimming, likely peaking between 20∘C and 24∘C (68∘F to 75∘F), with late July and August being the most enjoyable time for a dip.
Swimming is widely permitted and popular throughout Jack Lake, as it is a highly utilized recreational and cottage lake, confirming it as a prime summer destination. However, like most non-municipal lakes in the region, there are no designated, supervised public beaches with official lifeguards. Therefore, all swimming is strictly at one's own risk. Swimmers should be mindful of boat traffic, especially in channels and near docks, and should exercise caution regarding the presence of natural hazards like submerged rocks and sudden drop-offs.