Peterborough — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Peterborough, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Peterborough today is 20.1°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 14 | 21.0°C | 15.5°C | |
| SEP 15 | 22.1°C | 15.5°C | |
| SEP 16 | 21.4°C | 15.5°C | |
| SEP 17 | 20.4°C | 15.5°C | |
| SEP 18 | 20.8°C | 15.5°C | |
| SEP 19 | 20.9°C | 15.5°C | |
| SEP 20 | 20.3°C | 15.5°C | |
| SEP 21 | 20.1°C | 15.5°C | |
| SEP 22 | 15.5°C | 19.9°C | |
| SEP 23 | 15.5°C | 19.6°C | |
| SEP 24 | 15.5°C | 19.4°C | |
| SEP 25 | 15.5°C | 19.2°C | |
| SEP 26 | 15.5°C | 19.0°C | |
| SEP 27 | 15.5°C | 18.7°C | |
| SEP 28 | 15.5°C | 18.5°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 | 3°C | 4°C |
| February | 0°C | 3°C | 4°C |
| March | 0°C | 3°C | 5°C |
| April | 0°C | 5°C | 11°C |
| May | 4°C | 10°C | 15°C |
| June | 7°C | 13°C | 19°C |
| July | 15°C | 20°C | 25°C |
| August | 17°C | 21°C | 25°C |
| September | 11°C | 16°C | 20°C |
| October | 7°C | 12°C | 16°C |
| November | 3°C | 6°C | 11°C |
| December | 0°C | 3°C | 6°C |
Peterborough: Weather Forecast
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Peterborough, located in the Kawartha Lakes region of Ontario, is surrounded by a network of lakes and rivers that form part of the Trent–Severn Waterway, including Little Lake, the Otonabee River, and nearby Chemong and Clear Lakes. The water temperature in these inland bodies changes significantly with the seasons. During winter, surface temperatures often drop to near freezing, around 0–2 °C (32–36 °F), with ice covering many lakes. In spring, melting snow and cool air keep the water chilly, typically 5–10 °C (41–50 °F). By mid-summer, the shallower lakes around Peterborough warm up to 20–25 °C (68–77 °F), while deeper parts of the river and larger lakes stay slightly cooler. In autumn, the water gradually cools again to around 10–15 °C (50–59 °F) as the weather transitions.
Swimming in Peterborough is common during the summer, particularly at designated areas such as Beavermead Park Beach on Little Lake. The season generally runs from late June to early September, when temperatures are most comfortable and safety patrols are present. Outside this period, cold water and strong currents in the Otonabee River make swimming less advisable. However, the city’s clean water, scenic parks, and accessible lakes provide excellent conditions for summer recreation, paddling, and other outdoor water activities.