Lake Nipissing — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Nipissing, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Nipissing today is 21.3°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 |
|---|---|---|---|
| AUG 24 | 20.8°C | 19.0°C | |
| AUG 25 | 20.6°C | 19.0°C | |
| AUG 26 | 20.3°C | 19.0°C | |
| AUG 27 | 21.5°C | 19.0°C | |
| AUG 28 | 21.3°C | 19.0°C | |
| AUG 29 | 21.1°C | 19.0°C | |
| AUG 30 | 21.1°C | 19.0°C | |
| AUG 31 | 21.3°C | 19.0°C | |
| SEP 1 | 16.0°C | 21.0°C | |
| SEP 2 | 16.0°C | 20.8°C | |
| SEP 3 | 16.0°C | 20.5°C | |
| SEP 4 | 16.0°C | 20.2°C | |
| SEP 5 | 16.0°C | 20.0°C | |
| SEP 6 | 16.0°C | 19.7°C | |
| SEP 7 | 16.0°C | 19.4°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 | 8°C | 15°C |
| June | 7°C | 14°C | 18°C |
| July | 15°C | 20°C | 25°C |
| August | 17°C | 19°C | 24°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 |
Lake Nipissing: Water Temperature by Location
Lake Nipissing: Weather Forecast
September 1
September 2
September 3
September 4
September 5
September 6
Location & Local Information
Lake Nipissing, located in northeastern Ontario near the city of North Bay, is one of the province’s largest freshwater lakes and is known for its wide, shallow basin. Because of its shallow depth and exposure to wind and sunlight, the lake warms relatively quickly in summer and cools rapidly in autumn. In early spring, following ice melt in April, the surface temperature remains cold, averaging around 39–45°F (4–7°C). By late May and June, the water begins to warm to about 52–61°F (11–16°C). During midsummer, from July through August, Lake Nipissing typically reaches 68–75°F (20–24°C) in shallow bays and along beaches, while deeper areas stay slightly cooler. By late September, as temperatures drop, the water cools again below 57°F (14°C).
Swimming in Lake Nipissing is allowed and very popular during the warm summer months. The lake’s sandy beaches, especially near North Bay and Callander, provide safe and accessible spots for swimming and other water activities. During midsummer, the water becomes pleasantly warm for extended swimming and boating, though strong winds can occasionally create waves in open areas. The best time for swimming is from late June to early September, when both air and water temperatures are high enough to make the experience comfortable and enjoyable.