Hardy Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hardy Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hardy Lake today is 19.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| OCT 5 | 21.8°C | 22.0°C | |
| OCT 6 | 21.3°C | 22.0°C | |
| OCT 7 | 21.0°C | 22.0°C | |
| OCT 8 | 20.3°C | 22.0°C | |
| OCT 9 | 20.0°C | 22.0°C | |
| OCT 10 | 20.0°C | 22.0°C | |
| OCT 11 | 19.8°C | 22.0°C | |
| OCT 12 | 20.3°C | 22.0°C | |
| OCT 13 | 22.0°C | 19.3°C | |
| OCT 14 | 22.0°C | 19.5°C | |
| OCT 15 | 22.0°C | 19.6°C | |
| OCT 16 | 22.0°C | 19.8°C | |
| OCT 17 | 22.0°C | 19.9°C | |
| OCT 18 | 22.0°C | 20.0°C | |
| OCT 19 | 22.0°C | 20.2°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 | 8°C |
| February | 1°C | 4°C | 6°C |
| March | 2°C | 7°C | 12°C |
| April | 8°C | 13°C | 18°C |
| May | 14°C | 20°C | 24°C |
| June | 18°C | 22°C | 25°C |
| July | 23°C | 27°C | 30°C |
| August | 24°C | 27°C | 30°C |
| September | 22°C | 26°C | 30°C |
| October | 18°C | 22°C | 26°C |
| November | 7°C | 13°C | 18°C |
| December | 4°C | 7°C | 10°C |
Hardy Lake: Water Temperature by Location
Hardy Lake: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Hardy Lake in Indiana follows the seasonal temperature pattern typical of small Midwestern reservoirs. In winter the surface often sits near freezing, roughly 32–39°F (0–4°C), and ice cover is possible some winters. Spring sees a steady rise as the lake warms into the 40–60°F range (4–16°C) while stratification begins. Peak summer surface temperatures commonly reach about 70–85°F (21–29°C) on warm days, when the top layers are most comfortable for swimming, and early fall cools the surface back into the 50–65°F range (10–18°C) as turnover approaches.
Swimming is generally allowed at Hardy Lake in accordance with park regulations, but recreational use is subject to seasonal and safety considerations. There is typically no lifeguard on duty, so swimming is at one’s own risk, and managers may close or limit swimming when water quality tests show elevated bacteria or harmful algal blooms, during hazardous weather, or when temperatures are dangerously cold. Visitors should check current park notices before entering the water; comfortably warm swimming conditions are usually found in mid to late summer when surface temperatures exceed about 70°F (21°C), while spring and late fall are commonly too cool for prolonged swims.