Marion County Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Marion County Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Marion County Lake today is 29.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating. 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 | 26.2°C | 29.0°C | |
| JUL 15 | 28.6°C | 29.0°C | |
| JUL 16 | 28.6°C | 29.0°C | |
| JUL 17 | 29.6°C | 29.0°C | |
| JUL 18 | 29.3°C | 29.0°C | |
| JUL 19 | 29.3°C | 29.0°C | |
| JUL 20 | 29.6°C | 29.0°C | |
| JUL 21 | 29.6°C | 29.0°C | |
| JUL 22 | 29.0°C | 29.3°C | |
| JUL 23 | 29.0°C | 29.3°C | |
| JUL 24 | 29.0°C | 29.3°C | |
| JUL 25 | 29.0°C | 29.2°C | |
| JUL 26 | 29.0°C | 29.2°C | |
| JUL 27 | 29.0°C | 29.2°C | |
| JUL 28 | 29.0°C | 29.2°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 | 3°C | 6°C |
| February | 0°C | 3°C | 7°C |
| March | 2°C | 8°C | 15°C |
| April | 9°C | 14°C | 19°C |
| May | 16°C | 21°C | 25°C |
| June | 19°C | 23°C | 27°C |
| July | 23°C | 29°C | 35°C |
| August | 25°C | 28°C | 30°C |
| September | 19°C | 22°C | 25°C |
| October | 12°C | 17°C | 21°C |
| November | 7°C | 12°C | 17°C |
| December | 3°C | 3°C | 8°C |
Marion County Lake: Water Temperature by Location
Marion County Lake: Weather Forecast
July 22
July 23
July 24
July 25
July 26
Location & Local Information
Marion County Lake in Kansas experiences a wide seasonal swing in surface water temperatures. In winter the lake typically hovers near freezing, roughly 32–40°F (0–4°C), and in early spring it gradually warms through the mid 40s to mid 60s Fahrenheit (about 7–18°C). Peak summer surface temperatures commonly reach the low 70s to mid 80s°F (21–29°C), occasionally higher on hot, calm days. By autumn the water cools back into the mid 50s to low 70s°F (13–21°C). These values are approximate and vary with weather, wind, depth and how much inflow the lake receives; shallow bays warm and cool faster than deeper areas.
Swimming at Marion County Lake is generally allowed in designated recreational areas because the lake is managed for public use and seasonal activities. Access and organized swim sites are subject to local rules, water-quality checks and safety considerations, so postings or advisories may temporarily close swimming for algal blooms, low water, or hazardous conditions. There are often no lifeguards, so swimmers should exercise caution, be mindful of cold-water shock early or late in the year, and observe posted signs and guidelines to ensure a safe visit.