Four Mile Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Four Mile Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Four Mile Lake today is 19.9°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 |
|---|---|---|---|
| AUG 24 | 21.9°C | 22.0°C | |
| AUG 25 | 21.7°C | 22.0°C | |
| AUG 26 | 20.9°C | 22.0°C | |
| AUG 27 | 21.3°C | 22.0°C | |
| AUG 28 | 21.1°C | 22.0°C | |
| AUG 29 | 21.3°C | 22.0°C | |
| AUG 30 | 21.1°C | 22.0°C | |
| AUG 31 | 19.9°C | 22.0°C | |
| SEP 1 | 20.0°C | 19.9°C | |
| SEP 2 | 20.0°C | 19.9°C | |
| SEP 3 | 20.0°C | 19.9°C | |
| SEP 4 | 20.0°C | 19.9°C | |
| SEP 5 | 20.0°C | 19.9°C | |
| SEP 6 | 20.0°C | 19.9°C | |
| SEP 7 | 20.0°C | 19.9°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 | 6°C | 12°C | 16°C |
| June | 12°C | 16°C | 20°C |
| July | 17°C | 23°C | 29°C |
| August | 19°C | 22°C | 25°C |
| September | 18°C | 20°C | 22°C |
| October | 13°C | 16°C | 18°C |
| November | 3°C | 10°C | 15°C |
| December | 1°C | 4°C | 7°C |
Four Mile Lake: Water Temperature by Location
Four Mile Lake: Weather Forecast
September 1
September 2
September 3
September 4
September 5
September 6
Location & Local Information
Four Mile Lake, situated in the Kawartha Lakes region of Ontario, is a large, spring-fed inland lake whose clear waters are popular for recreation. Like most inland lakes in the area, its water temperature fluctuates significantly. In the deep 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). In the peak summer season, the surface water warms up considerably, typically reaching a comfortable range for swimming, likely peaking between 20∘C and 24∘C (68∘F to 75∘F).
Swimming is widely permitted and popular at Four Mile Lake, particularly at the Burnt River Public Beach on its eastern shore. This municipal beach features a designated swimming area and is routinely monitored for water quality by the Haliburton Kawartha Pine Ridge District Health Unit for E. coli bacteria, confirming it as a designated swimming site. However, the beach is unsupervised, meaning there are no official lifeguards on duty, and all swimming is strictly at one's own risk. Swimmers must always check for and adhere to any posted water quality advisories, which may be issued when bacterial levels are elevated, often following heavy rainfall.