Shawnee Mission Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Shawnee Mission Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Shawnee Mission Lake today is 18.7°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 6 | 20.0°C | 19.5°C | |
| OCT 7 | 19.5°C | 19.5°C | |
| OCT 8 | 19.0°C | 19.5°C | |
| OCT 9 | 19.4°C | 19.5°C | |
| OCT 10 | 19.4°C | 19.5°C | |
| OCT 11 | 19.1°C | 19.5°C | |
| OCT 12 | 19.5°C | 19.5°C | |
| OCT 13 | 18.7°C | 19.5°C | |
| OCT 14 | 19.5°C | 18.7°C | |
| OCT 15 | 19.5°C | 18.8°C | |
| OCT 16 | 19.5°C | 18.8°C | |
| OCT 17 | 19.5°C | 18.9°C | |
| OCT 18 | 19.5°C | 18.9°C | |
| OCT 19 | 19.5°C | 18.9°C | |
| OCT 20 | 19.5°C | 19.0°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 | 3°C | 6°C |
| February | 0°C | 3°C | 7°C |
| March | 1°C | 9°C | 18°C |
| April | 9°C | 15°C | 21°C |
| May | 15°C | 20°C | 25°C |
| June | 20°C | 24°C | 27°C |
| July | 26°C | 31°C | 35°C |
| August | 24°C | 28°C | 32°C |
| September | 22°C | 26°C | 29°C |
| October | 15°C | 20°C | 24°C |
| November | 6°C | 12°C | 17°C |
| December | 1°C | 4°C | 7°C |
Shawnee Mission Lake: Water Temperature by Location
Shawnee Mission Lake: Weather Forecast
October 14
October 15
October 16
October 17
Location & Local Information
Shawnee Mission Park’s lake in Johnson County, Kansas experiences the typical seasonal swings of a shallow Midwestern reservoir. In winter the surface often hangs near freezing, roughly 32–40°F (0–4°C). Spring sees a steady rise as air temperatures warm, with surface readings commonly between 45–65°F (7–18°C). In summer the lake is warmest: typical surface temperatures range from about 75–85°F (24–29°C), and during heat waves shallow areas can approach the low 90s°F (around 32°C). In autumn the water cools again, usually falling into the 50–70°F (10–21°C) band. These numbers are approximate and vary with recent weather, depth, wind, and time of day; shallower, sheltered coves warm and cool faster than deeper or wind-exposed sections.
Swimming at Shawnee Mission Park’s lake is not provided as a managed beach activity; there is no staffed public bathing area, and park guidance has historically emphasized fishing, boating, and trails rather than organized swimming. Because of that, swimming is generally discouraged or restricted due to the absence of lifeguards, potential water-quality fluctuations, aquatic vegetation, and boat traffic that can create safety hazards. Visitors should follow posted signs and local park rules and contact Johnson County parks staff for the current official stance before entering the water.