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 18.1°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 3 | 17.6°C | 17.0°C | |
| JUN 4 | 17.6°C | 17.0°C | |
| JUN 5 | 18.4°C | 17.0°C | |
| JUN 6 | 18.9°C | 17.0°C | |
| JUN 7 | 17.8°C | 17.0°C | |
| JUN 8 | 17.4°C | 17.0°C | |
| JUN 10 | 18.1°C | 17.0°C | |
| JUN 11 | 17.0°C | 18.0°C | |
| JUN 12 | 17.0°C | 18.0°C | |
| JUN 13 | 17.0°C | 17.9°C | |
| JUN 14 | 17.0°C | 17.9°C | |
| JUN 15 | 17.0°C | 17.8°C | |
| JUN 16 | 17.0°C | 17.8°C | |
| JUN 17 | 17.0°C | 17.7°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 | 26°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
June 9
June 10
June 11
June 12
June 13
June 14
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.