Acton Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Acton Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Acton Lake today is 22.5°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 | 23.8°C | 25.5°C | |
| SEP 15 | 24.6°C | 25.5°C | |
| SEP 16 | 23.4°C | 25.5°C | |
| SEP 17 | 23.0°C | 25.5°C | |
| SEP 18 | 22.8°C | 25.5°C | |
| SEP 19 | 23.0°C | 25.5°C | |
| SEP 20 | 22.6°C | 25.5°C | |
| SEP 21 | 22.5°C | 25.5°C | |
| SEP 22 | 25.5°C | 22.7°C | |
| SEP 23 | 25.5°C | 22.8°C | |
| SEP 24 | 25.5°C | 23.0°C | |
| SEP 25 | 25.5°C | 23.1°C | |
| SEP 26 | 25.5°C | 23.3°C | |
| SEP 27 | 25.5°C | 23.4°C | |
| SEP 28 | 25.5°C | 23.6°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 | 9°C |
| February | 1°C | 3°C | 6°C |
| March | 2°C | 7°C | 13°C |
| April | 4°C | 11°C | 18°C |
| May | 13°C | 17°C | 22°C |
| June | 18°C | 22°C | 25°C |
| July | 21°C | 25°C | 29°C |
| August | 23°C | 26°C | 29°C |
| September | 21°C | 26°C | 30°C |
| October | 17°C | 21°C | 25°C |
| November | 6°C | 12°C | 17°C |
| December | 4°C | 7°C | 10°C |
Acton Lake: Water Temperature by Location
Acton Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Acton Lake’s water temperatures follow the seasonal patterns typical of midwestern reservoirs. In winter the surface commonly hovers near freezing, roughly 34–40°F (1–4°C). Spring brings a steady rise, with waters generally between about 40–60°F (4–16°C) as the lake mixes and warms. Peak summer temperatures often reach the warmest range, roughly 70–80°F (21–27°C) in open, shallow areas during heat spells, though nights and deeper spots remain cooler. In autumn the lake cools again, typically settling between 50–65°F (10–18°C) as air temperatures drop and stratification breaks down.
Swimming in Acton Lake is not offered as a formal recreational activity because there are no designated swim beaches and the site is managed with safety and resource concerns in mind. The absence of lifeguards, the presence of boat traffic, submerged structures and variable currents can present hazards, and periodic water‑quality issues such as algal blooms further limit safe contact recreation. For those visiting, shoreline access, fishing and boating are the primary activities supported, while entering the water for unsupervised swimming is discouraged and typically not allowed under the lake’s management policies.