Lake Thompson — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Thompson, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Thompson today is 17.6°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 | 20.1°C | 20.9°C | |
| SEP 15 | 19.2°C | 20.9°C | |
| SEP 16 | 19.2°C | 20.9°C | |
| SEP 17 | 17.5°C | 20.9°C | |
| SEP 18 | 17.4°C | 20.9°C | |
| SEP 19 | 17.7°C | 20.9°C | |
| SEP 20 | 17.8°C | 20.9°C | |
| SEP 21 | 17.6°C | 20.9°C | |
| SEP 22 | 20.9°C | 17.8°C | |
| SEP 23 | 20.9°C | 17.9°C | |
| SEP 24 | 20.9°C | 18.1°C | |
| SEP 25 | 20.9°C | 18.3°C | |
| SEP 26 | 20.9°C | 18.4°C | |
| SEP 27 | 20.9°C | 18.6°C | |
| SEP 28 | 20.9°C | 18.8°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 | 6°C | 12°C |
| February | 0°C | 8°C | 15°C |
| March | 1°C | 9°C | 17°C |
| April | 3°C | 12°C | 20°C |
| May | 7°C | 15°C | 23°C |
| June | 15°C | 19°C | 24°C |
| July | 17°C | 22°C | 28°C |
| August | 20°C | 24°C | 28°C |
| September | 17°C | 21°C | 25°C |
| October | 5°C | 12°C | 19°C |
| November | 2°C | 6°C | 10°C |
| December | 0°C | 5°C | 8°C |
Lake Thompson: Water Temperature by Location
Lake Thompson: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Lake Thompson’s surface water temperature varies widely through the year. In late winter and early spring the lake hovers near freezing, roughly 32–40°F (0–4°C), and ice cover is common during the coldest months. As spring advances temperatures typically climb into the 40s and 50s°F (4–15°C). By summer the surface often reaches the most comfortable ranges for swimming, commonly about 70–80°F (21–27°C), and on hot, calm days shallow areas can warm into the mid‑80s°F (around 29°C). In autumn the water cools again into the 50s–60s°F (10–16°C). Because parts of the lake are relatively shallow and winds can stir and mix the water, temperatures can change quickly with weather and sunlight, and surface readings may be several degrees warmer than deeper water.
Swimming at Lake Thompson is generally permitted where public access and beaches are provided, but conditions determine whether it is advisable. Warm summer temperatures often make swimming pleasant, yet fluctuating water levels, submerged hazards, limited lifeguard presence, and occasional water‑quality issues such as algal blooms can restrict safe swimming. In winter the lake is unsuitable for open‑water swimming due to cold and ice. Visitors should check local advisories, posted signs, and recent water‑quality reports before entering the water.