Lake Lewisville — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Lewisville, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Lewisville today is 47°F.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 47°F (8°C) to 50°F (10°C). This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing can be used. 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 |
|---|---|---|---|
| JAN 14 | 53°F | 51°F | |
| JAN 15 | 54°F | 51°F | |
| JAN 16 | 54°F | 51°F | |
| JAN 17 | 53°F | 51°F | |
| JAN 18 | 53°F | 51°F | |
| JAN 19 | 49°F | 51°F | |
| JAN 20 | 49°F | 51°F | |
| JAN 21 | 49°F | 51°F | |
| JAN 22 | 51°F | 48°F | |
| JAN 23 | 51°F | 48°F | |
| JAN 24 | 51°F | 48°F | |
| JAN 25 | 51°F | 48°F | |
| JAN 26 | 51°F | 48°F | |
| JAN 27 | 51°F | 48°F | |
| JAN 28 | 51°F | 49°F |
* 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 | 45°F | 51°F | 57°F |
| February | 43°F | 47°F | 52°F |
| March | 45°F | 56°F | 68°F |
| April | 61°F | 65°F | 70°F |
| May | 63°F | 71°F | 79°F |
| June | 72°F | 77°F | 82°F |
| July | 77°F | 84°F | 91°F |
| August | 79°F | 84°F | 88°F |
| September | 77°F | 82°F | 88°F |
| October | 70°F | 74°F | 79°F |
| November | 54°F | 62°F | 72°F |
| December | 46°F | 55°F | 64°F |
Lake Lewisville: Water Temperature by Location
Lake Lewisville: Weather Forecast
January 22
January 23
January 24
January 25
January 26
Location & Local Information
Lake Lewisville’s surface water temperature varies a lot with the seasons and local weather. In summer months surface readings commonly run from about 75–90°F (24–32°C) and can climb into the low 90s (around 33°C) during heat waves. Spring and fall are transitional, with surface temperatures typically in the mid‑50s to mid‑70s °F (about 13–24°C), while winter often brings cooler surface water around 40–55°F (4–13°C). Deeper areas stay colder year‑round and the lake can stratify in warm months, so swimmers may encounter markedly cooler pockets below the surface. Temperatures reported by parks or marinas are for the surface and will change with wind, rain and seasonal trends.
Swimming is generally allowed at Lake Lewisville in designated beach and park areas because the reservoir is managed for public recreation alongside flood control and water supply. However, access is controlled by local authorities and some areas prohibit swimming for safety or water‑quality reasons. Hazards include boat traffic, submerged structures, sudden drop‑offs and the absence of lifeguards at many sites; post‑storm runoff can also prompt advisories. For safe swimming, people should use marked swim areas, heed posted signs, and be mindful that actual conditions and water temperatures may vary from the averages.