Cultus Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Cultus Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Cultus Lake today is 21.1°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 |
|---|---|---|---|
| AUG 4 | 20.6°C | 19.0°C | |
| AUG 5 | 20.7°C | 19.0°C | |
| AUG 6 | 20.4°C | 19.0°C | |
| AUG 7 | 20.9°C | 19.0°C | |
| AUG 8 | 21.0°C | 19.0°C | |
| AUG 9 | 21.2°C | 19.0°C | |
| AUG 10 | 21.1°C | 19.0°C | |
| AUG 11 | 21.1°C | 19.0°C | |
| AUG 12 | 19.0°C | 21.0°C | |
| AUG 13 | 19.0°C | 20.9°C | |
| AUG 14 | 19.0°C | 20.8°C | |
| AUG 15 | 19.0°C | 20.7°C | |
| AUG 16 | 19.0°C | 20.6°C | |
| AUG 17 | 19.0°C | 20.5°C | |
| AUG 18 | 19.0°C | 20.4°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 | 4°C | 7°C |
| February | 0°C | 4°C | 7°C |
| March | 0°C | 4°C | 8°C |
| April | 0°C | 6°C | 12°C |
| May | 4°C | 10°C | 17°C |
| June | 7°C | 13°C | 19°C |
| July | 15°C | 19°C | 24°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 | 4°C | 8°C |
Cultus Lake: Water Temperature by Location
Cultus Lake: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
Cultus Lake, located south of Chilliwack in British Columbia’s Fraser Valley, is one of the region’s warmest and most popular freshwater lakes. Its water temperature is influenced by its moderate depth and the valley’s warm summer climate. In early spring, the lake is still cool, averaging around 46–50°F (8–10°C) as runoff from nearby mountains fills it. By late May and June, the temperature rises steadily to about 59–66°F (15–19°C). During midsummer, from July through August, Cultus Lake typically reaches its warmest period, with surface temperatures between 70–75°F (21–24°C), especially in shallow bays and along sandy beaches. In autumn, cooling weather and shorter days gradually bring the water back below 59°F (15°C) by late September.
Swimming is allowed and widely enjoyed at Cultus Lake, particularly within Cultus Lake Provincial Park and nearby beaches. The lake’s clear, clean water and pleasant summer warmth make it ideal for swimming, paddleboarding, and other water activities. Lifeguarded areas and gradual shorelines provide safe access for families and recreational swimmers. Although the deeper sections remain cooler, surface temperatures during summer are among the most comfortable in southwestern British Columbia. The best time for swimming is from late June through early September, when both the air and water temperatures are warm and stable.