Lake Jacksonville — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Jacksonville, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Jacksonville today is 28.9°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 | 27.8°C | 29.0°C | |
| JUL 15 | 29.8°C | 29.0°C | |
| JUL 16 | 29.8°C | 29.0°C | |
| JUL 17 | 29.9°C | 29.0°C | |
| JUL 18 | 28.5°C | 29.0°C | |
| JUL 19 | 28.5°C | 29.0°C | |
| JUL 20 | 28.5°C | 29.0°C | |
| JUL 21 | 28.6°C | 29.0°C | |
| JUL 22 | 29.0°C | 28.9°C | |
| JUL 23 | 29.0°C | 28.9°C | |
| JUL 24 | 29.0°C | 28.9°C | |
| JUL 25 | 29.0°C | 28.9°C | |
| JUL 26 | 29.0°C | 28.9°C | |
| JUL 27 | 29.0°C | 28.9°C | |
| JUL 28 | 29.0°C | 28.9°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 | 6°C | 10°C | 15°C |
| February | 6°C | 11°C | 16°C |
| March | 9°C | 15°C | 21°C |
| April | 16°C | 20°C | 24°C |
| May | 19°C | 24°C | 29°C |
| June | 22°C | 26°C | 29°C |
| July | 25°C | 29°C | 33°C |
| August | 25°C | 28°C | 30°C |
| September | 25°C | 29°C | 32°C |
| October | 23°C | 26°C | 29°C |
| November | 15°C | 19°C | 23°C |
| December | 11°C | 14°C | 17°C |
Lake Jacksonville: Water Temperature by Location
Lake Jacksonville: Weather Forecast
July 22
July 23
July 24
July 25
July 26
Location & Local Information
Lake Jacksonville’s surface water temperatures change noticeably through the year. In winter months the lake commonly cools to roughly 45–60°F (7–16°C), while spring sees a steady rise into the 60–75°F range (16–24°C). Peak summer surface readings often reach about 80–90°F (27–32°C), especially in shallower coves, before cooling again into the 60–75°F bracket in autumn. Like many reservoirs, Lake Jacksonville can be thermally stratified in warm weather, with surface layers significantly warmer than deeper water; deeper pockets remain cooler even on hot days. Local weather, wind, and inflow conditions can shift these numbers from year to year.
Recreational swimming is commonly practiced at Lake Jacksonville, but is subject to local rules and site-specific advisories. Swimming is typically allowed in designated recreation areas, while some zones near intakes or boat channels may be restricted for safety and water-supply protection. There are often no lifeguards on duty, so swimmers should proceed at their own risk and be aware of hazards such as sudden drop-offs, submerged structures, boat traffic, and occasional water-quality issues like algal blooms. Visitors are advised to observe posted signs and current advisories before entering the water.