Hamilton — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hamilton, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hamilton today is 20.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 12 | 21.1°C | 21.0°C | |
| SEP 13 | 21.1°C | 21.0°C | |
| SEP 14 | 20.4°C | 21.0°C | |
| SEP 15 | 20.8°C | 21.0°C | |
| SEP 16 | 20.7°C | 21.0°C | |
| SEP 17 | 20.0°C | 21.0°C | |
| SEP 18 | 20.6°C | 21.0°C | |
| SEP 19 | 20.7°C | 21.0°C | |
| SEP 20 | 21.0°C | 20.4°C | |
| SEP 21 | 21.0°C | 20.5°C | |
| SEP 22 | 21.0°C | 20.5°C | |
| SEP 23 | 21.0°C | 20.5°C | |
| SEP 24 | 21.0°C | 20.6°C | |
| SEP 25 | 21.0°C | 20.6°C | |
| SEP 26 | 21.0°C | 20.6°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 | 0°C | 2°C | 4°C |
| March | 0°C | 3°C | 6°C |
| April | 1°C | 6°C | 11°C |
| May | 6°C | 12°C | 18°C |
| June | 12°C | 17°C | 22°C |
| July | 18°C | 22°C | 27°C |
| August | 19°C | 23°C | 27°C |
| September | 16°C | 21°C | 26°C |
| October | 6°C | 14°C | 21°C |
| November | 4°C | 11°C | 18°C |
| December | 1°C | 5°C | 8°C |
Hamilton: Weather Forecast
September 20
September 21
September 22
September 23
September 24
Location & Local Information
Hamilton, located along the western shore of Lake Ontario, benefits from its proximity to one of North America's Great Lakes. The water temperature in Lake Ontario varies significantly throughout the year. During the summer months, the lake warms to about 68°F to 77°F (20°C to 25°C) near the surface, making it a popular time for swimming and other water activities. In the colder months, the water cools drastically, often falling to 39°F to 46°F (4°C to 8°C), and ice can form along the shore in winter.
Swimming in Lake Ontario near Hamilton is possible at several beaches, such as Bayfront Park and Confederation Beach Park. These areas often feature calmer waters, especially in designated swimming zones. However, water quality is carefully monitored, and swimming is only encouraged when conditions are safe. The lake is also a hub for other activities like kayaking, paddleboarding, and sailing, offering plenty of options for those who prefer to stay on the surface.
Beyond swimming, Lake Ontario provides Hamilton residents and visitors with stunning views and opportunities for relaxation along its waterfront trails and parks. The combination of scenic beauty and recreational options makes the lake a treasured feature of the city, especially during the warmer months when people gather to enjoy its refreshing waters.