Osoyoos Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Osoyoos Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Osoyoos Lake today is 17.9°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 |
|---|---|---|---|
| SEP 14 | 18.6°C | 18.0°C | |
| SEP 15 | 18.5°C | 18.0°C | |
| SEP 16 | 18.3°C | 18.0°C | |
| SEP 17 | 18.6°C | 18.0°C | |
| SEP 18 | 18.9°C | 18.0°C | |
| SEP 19 | 18.3°C | 18.0°C | |
| SEP 20 | 18.1°C | 18.0°C | |
| SEP 21 | 17.9°C | 18.0°C | |
| SEP 22 | 18.0°C | 17.9°C | |
| SEP 23 | 18.0°C | 17.9°C | |
| SEP 24 | 18.0°C | 17.9°C | |
| SEP 25 | 18.0°C | 17.9°C | |
| SEP 26 | 18.0°C | 17.9°C | |
| SEP 27 | 18.0°C | 17.9°C | |
| SEP 28 | 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 | 3°C | 5°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 3°C | 7°C |
| April | 0°C | 6°C | 13°C |
| May | 4°C | 11°C | 19°C |
| June | 9°C | 15°C | 22°C |
| July | 17°C | 22°C | 28°C |
| August | 19°C | 23°C | 27°C |
| September | 14°C | 18°C | 22°C |
| October | 9°C | 14°C | 18°C |
| November | 5°C | 8°C | 11°C |
| December | 1°C | 4°C | 7°C |
Osoyoos Lake: Water Temperature by Location
Osoyoos Lake: Weather Forecast
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Osoyoos Lake, shared between British Columbia in Canada and Washington State in the United States, is one of the warmest freshwater lakes in the Pacific Northwest. Located in a semi-arid valley surrounded by vineyards and desert-like hills, it benefits from abundant sunshine and a dry climate that allows the water to warm rapidly in spring and summer. In early spring, the lake’s surface temperature averages around 48–54°F (9–12°C). By late May and June, it rises quickly to about 64–70°F (18–21°C). During midsummer, from July through August, Osoyoos Lake reaches its warmest period, with surface temperatures often between 73–79°F (23–26°C), making it one of the most comfortable lakes for swimming in western Canada. By late September, as nights cool, the temperature drops again below 64°F (18°C).
Swimming in Osoyoos Lake is widely enjoyed on both sides of the border, and it is a central feature of summer recreation in the region. The lake’s shallow bays and sandy beaches provide ideal conditions for swimming, paddleboarding, and other water sports. The warm water, clear visibility, and safe shoreline access make it suitable for families and casual swimmers alike. The best swimming season extends from late June through early September, when both air and water temperatures create ideal conditions for prolonged and pleasant swimming experiences.