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 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 |
|---|---|---|---|
| JUN 26 | 16.3°C | 18.0°C | |
| JUN 27 | 16.6°C | 18.0°C | |
| JUN 28 | 16.7°C | 18.0°C | |
| JUN 29 | 16.9°C | 18.0°C | |
| JUN 30 | 18.4°C | 18.0°C | |
| JUL 1 | 18.2°C | 22.5°C | |
| JUL 2 | 19.2°C | 22.5°C | |
| JUL 3 | 19.1°C | 22.5°C | |
| JUL 4 | 22.5°C | 20.0°C | |
| JUL 5 | 22.5°C | 20.2°C | |
| JUL 6 | 22.5°C | 20.3°C | |
| JUL 7 | 22.5°C | 20.4°C | |
| JUL 8 | 22.5°C | 20.6°C | |
| JUL 9 | 22.5°C | 20.7°C | |
| JUL 10 | 22.5°C | 20.8°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
July 4
July 5
July 6
July 7
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.