Cecil M Harden Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Cecil M Harden Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Cecil M Harden Lake today is 23.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 | 23.6°C | 25.5°C | |
| SEP 15 | 23.5°C | 25.5°C | |
| SEP 16 | 22.6°C | 25.5°C | |
| SEP 17 | 22.2°C | 25.5°C | |
| SEP 18 | 22.0°C | 25.5°C | |
| SEP 19 | 22.5°C | 25.5°C | |
| SEP 20 | 22.9°C | 25.5°C | |
| SEP 21 | 23.1°C | 25.5°C | |
| SEP 22 | 25.5°C | 23.2°C | |
| SEP 23 | 25.5°C | 23.3°C | |
| SEP 24 | 25.5°C | 23.5°C | |
| SEP 25 | 25.5°C | 23.6°C | |
| SEP 26 | 25.5°C | 23.7°C | |
| SEP 27 | 25.5°C | 23.8°C | |
| SEP 28 | 25.5°C | 23.9°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 | 2°C | 5°C |
| February | 1°C | 4°C | 7°C |
| March | 3°C | 7°C | 12°C |
| April | 7°C | 12°C | 18°C |
| May | 14°C | 18°C | 22°C |
| June | 18°C | 21°C | 24°C |
| July | 23°C | 27°C | 31°C |
| August | 23°C | 26°C | 29°C |
| September | 22°C | 26°C | 29°C |
| October | 16°C | 20°C | 23°C |
| November | 6°C | 13°C | 18°C |
| December | 2°C | 6°C | 8°C |
Cecil M Harden Lake: Water Temperature by Location
Cecil M Harden Lake: Weather Forecast
September 22
September 23
September 24
September 25
September 26
September 27
Location & Local Information
Cecil M. Harden Lake, a midwestern reservoir in Indiana, follows the typical seasonal temperature pattern of inland lakes. In spring the water warms from near-freezing up to roughly 45–65°F (7–18°C) as air temperatures rise. By early summer surface temperatures commonly reach the mid-60s to mid-70s °F (18–24°C), with peak midsummer surface readings often around 75–85°F (24–29°C) in shallow, sun-warmed areas. In autumn the lake cools back into the 50–68°F range (10–20°C) before winter brings near-freezing conditions, often 32–40°F (0–4°C) at the surface, especially under ice if the lake freezes.
Swimming at Cecil M. Harden Lake is generally allowed because it is a public recreational reservoir managed for multiple uses, including boating, fishing and shoreline recreation. There are no universal lifeguards on the lake and some areas are better suited for wading or swimming than others, so swimmers should use marked or commonly used recreation spots, heed posted signs, and be cautious of boat traffic, sudden drop-offs and aquatic vegetation. Seasonal issues such as cooler spring/fall temperatures and occasional algal blooms in warm months can affect water quality and comfort, so checking current conditions before swimming is advisable.