Monroe Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Monroe Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Monroe Lake today is 27°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 |
|---|---|---|---|
| JUL 14 | 24.6°C | 27.0°C | |
| JUL 15 | 26.8°C | 27.0°C | |
| JUL 16 | 26.8°C | 27.0°C | |
| JUL 17 | 26.8°C | 27.0°C | |
| JUL 18 | 26.8°C | 27.0°C | |
| JUL 19 | 26.9°C | 27.0°C | |
| JUL 20 | 27.0°C | 27.0°C | |
| JUL 21 | 27.0°C | 27.0°C | |
| JUL 22 | 27.0°C | 27.0°C | |
| JUL 23 | 27.0°C | 27.0°C | |
| JUL 24 | 27.0°C | 27.0°C | |
| JUL 25 | 27.0°C | 27.0°C | |
| JUL 26 | 27.0°C | 27.0°C | |
| JUL 27 | 27.0°C | 27.0°C | |
| JUL 28 | 27.0°C | 27.0°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 | 0°C | 3°C | 7°C |
| March | 2°C | 7°C | 12°C |
| April | 7°C | 12°C | 18°C |
| May | 14°C | 18°C | 22°C |
| June | 18°C | 23°C | 27°C |
| July | 21°C | 27°C | 33°C |
| August | 24°C | 27°C | 30°C |
| September | 21°C | 26°C | 31°C |
| October | 17°C | 20°C | 23°C |
| November | 9°C | 14°C | 18°C |
| December | 4°C | 8°C | 11°C |
Monroe Lake: Water Temperature by Location
Monroe Lake: Weather Forecast
July 22
July 23
July 24
July 25
July 26
Location & Local Information
Monroe Lake, a large reservoir in southern Indiana, experiences notable seasonal shifts in surface water temperature. In spring the surface generally warms from roughly 40–65°F (4–18°C) as runoff and air temperatures rise. Peak summer conditions commonly bring the warmest water, with surface temperatures typically in the 70–85°F range (21–29°C), making the lake most comfortable for swimming. Early fall usually sees a gradual cooling to about 60–75°F (16–24°C) before late fall and winter drop surface temperatures into the 32–45°F range (0–7°C), when the water becomes decidedly cold and near-freezing in the coldest periods.
Swimming is permitted at Monroe Lake in designated recreational areas because the reservoir is managed for public recreation, but conditions and rules vary by site. Designated beaches or swim zones are established to separate swimmers from boat traffic and to account for changing water levels; lifeguard coverage is not guaranteed at all locations, so many spots are swim-at-your-own-risk. Water temperature, boat traffic, currents near inlets and sudden drop-offs can affect safety, and occasional advisories or temporary closures may be issued for water-quality or safety reasons, so checking current local guidance before swimming is advisable.