Oakville — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Oakville, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Oakville today is 17.8°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 | 16.9°C | 18.0°C | |
| JUN 4 | 17.3°C | 18.0°C | |
| JUN 5 | 18.5°C | 18.0°C | |
| JUN 6 | 18.1°C | 18.0°C | |
| JUN 7 | 17.5°C | 18.0°C | |
| JUN 8 | 17.0°C | 18.0°C | |
| JUN 11 | 18.0°C | 17.8°C | |
| JUN 12 | 18.0°C | 17.8°C | |
| JUN 13 | 18.0°C | 17.8°C | |
| JUN 14 | 18.0°C | 17.8°C | |
| JUN 15 | 18.0°C | 17.9°C | |
| JUN 16 | 18.0°C | 17.9°C | |
| JUN 17 | 18.0°C | 17.9°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 | 4°C | 7°C |
| February | -1°C | 1°C | 3°C |
| March | -1°C | 3°C | 6°C |
| April | 0°C | 6°C | 12°C |
| May | 8°C | 13°C | 18°C |
| June | 14°C | 18°C | 22°C |
| July | 16°C | 21°C | 26°C |
| August | 19°C | 22°C | 25°C |
| September | 16°C | 20°C | 23°C |
| October | 10°C | 15°C | 20°C |
| November | 4°C | 10°C | 14°C |
| December | 1°C | 6°C | 9°C |
Oakville: Weather Forecast
June 9
June 10
June 11
June 12
June 13
June 14
Location & Local Information
Oakville sits directly on the shores of Lake Ontario, one of the Great Lakes, whose immense depth and volume significantly influence its water temperature. In the winter months, the lake is near freezing, typically ranging from 1∘C to 4∘C (34∘F to 39∘F), and only rarely freezes over completely due to its depth. Even in the peak summer season, Lake Ontario's surface temperature is cooler than smaller, shallower bodies of water, generally reaching a maximum range of 21∘C to 24∘C (70∘F to 75∘F).
Swimming is widely permitted and popular at Oakville's municipal beaches on Lake Ontario, such as Bronte Beach Park and Coronation Park. The Halton Region Public Health monitors water quality at these beaches weekly during the summer for E. coli bacteria, confirming that swimming is an expected recreational activity. However, swimmers must adhere to posted warnings, as high bacterial counts, often occurring after heavy rainfall, can lead to Unsafe for Swimming advisories. Swimmers must also be cautious of cold upwellings, which can cause the water temperature to drop rapidly and unexpectedly, even on hot summer days.