Barrie — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Barrie, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Barrie today is 17.9°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 |
|---|---|---|---|
| SEP 15 | 19.4°C | 21.0°C | |
| SEP 16 | 19.2°C | 21.0°C | |
| SEP 17 | 18.9°C | 21.0°C | |
| SEP 18 | 19.0°C | 21.0°C | |
| SEP 19 | 18.8°C | 21.0°C | |
| SEP 20 | 18.6°C | 21.0°C | |
| SEP 21 | 18.5°C | 21.0°C | |
| SEP 22 | 18.2°C | 21.0°C | |
| SEP 23 | 21.0°C | 18.1°C | |
| SEP 24 | 21.0°C | 18.2°C | |
| SEP 25 | 21.0°C | 18.4°C | |
| SEP 26 | 21.0°C | 18.5°C | |
| SEP 27 | 21.0°C | 18.7°C | |
| SEP 28 | 21.0°C | 18.8°C | |
| SEP 29 | 21.0°C | 19.0°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 | 4°C | 6°C |
| February | 0°C | 4°C | 7°C |
| March | 0°C | 3°C | 6°C |
| April | 2°C | 8°C | 14°C |
| May | 6°C | 14°C | 22°C |
| June | 12°C | 18°C | 24°C |
| July | 18°C | 23°C | 27°C |
| August | 19°C | 24°C | 29°C |
| September | 17°C | 21°C | 25°C |
| October | 13°C | 16°C | 19°C |
| November | 3°C | 10°C | 15°C |
| December | 1°C | 5°C | 8°C |
Barrie: Weather Forecast
September 23
September 24
September 25
September 26
September 27
September 28
Location & Local Information
Lake Simcoe, on which Barrie sits, is a large, relatively shallow inland lake that is a major recreational hub in Central Ontario. Water temperatures experience a dramatic shift between seasons. In the winter, the entire lake typically develops a thick layer of ice, with water temperatures near freezing, generally ranging from 0∘C to 5∘C (32∘F to 41∘F), making it a popular destination for ice fishing. In the peak summer months, from late June to August, the lake warms significantly, with surface temperatures typically reaching a comfortable range of 20∘C to 25∘C (68∘F to 77∘F).
Swimming is widely permitted and highly encouraged at Barrie's popular municipal beaches on Kempenfelt Bay, such as Centennial Beach and Johnson's Beach. These beaches are designated swimming areas, with lifeguards on duty during the peak summer season, confirming their safety status. However, the Simcoe Muskoka District Health Unit routinely monitors the water for E. coli bacteria. Swimmers must always check for and adhere to swimming advisories, which are frequently posted when bacterial counts, often linked to runoff after heavy rain, temporarily exceed safe limits for swimming.