Lake Jocassee — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Jocassee, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Jocassee today is 21.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| JUN 3 | 19.2°C | 23.0°C | |
| JUN 4 | 19.0°C | 23.0°C | |
| JUN 5 | 19.2°C | 23.0°C | |
| JUN 6 | 19.8°C | 23.0°C | |
| JUN 7 | 20.3°C | 23.0°C | |
| JUN 8 | 20.8°C | 23.0°C | |
| JUN 10 | 21.4°C | 23.0°C | |
| JUN 11 | 23.0°C | 21.8°C | |
| JUN 12 | 23.0°C | 21.8°C | |
| JUN 13 | 23.0°C | 21.9°C | |
| JUN 14 | 23.0°C | 22.0°C | |
| JUN 15 | 23.0°C | 22.0°C | |
| JUN 16 | 23.0°C | 22.1°C | |
| JUN 17 | 23.0°C | 22.2°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 | 5°C | 10°C | 14°C |
| February | 4°C | 8°C | 12°C |
| March | 7°C | 12°C | 17°C |
| April | 11°C | 16°C | 21°C |
| May | 14°C | 19°C | 24°C |
| June | 18°C | 23°C | 28°C |
| July | 19°C | 22°C | 24°C |
| August | 22°C | 25°C | 27°C |
| September | 19°C | 23°C | 27°C |
| October | 15°C | 19°C | 23°C |
| November | 10°C | 15°C | 18°C |
| December | 6°C | 10°C | 14°C |
Lake Jocassee: Water Temperature by Location
Lake Jocassee: Weather Forecast
June 9
June 10
June 11
June 12
Location & Local Information
Lake Jocassee is a deep, clear reservoir in the foothills of the Appalachians, and its water temperatures reflect that depth and mountain location. Surface readings in winter typically fall into the 40–50°F (4–10°C) range, while spring waters commonly warm to about 50–65°F (10–18°C). In summer, surface temperatures most often reach roughly 65–75°F (18–24°C), though conditions vary with weather and wind. Because the lake plunges to great depths, colder layers remain near 50°F (≈10°C) year‑round, so thermoclines can make temperatures drop sharply with depth even on warm days. Clarity can be high, but the bulk of the volume stays cool.
Swimming is permitted in many parts of Lake Jocassee, including day‑use areas managed for recreation, but it is approached cautiously by visitors because of safety and environmental factors. The relatively cold water—even in summer—can contribute to cold shock and rapid loss of body heat, and there are no widespread lifeguard services; submerged structure, sudden drop‑offs and boat traffic add hazards. For those who choose to swim, staying near shore, using a flotation device, and checking local signage and conditions are recommended because the lake’s temperature and depth create risks not always obvious from the surface.