Stone Mountain Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Stone Mountain Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Stone Mountain Lake today is 22.3°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 |
|---|---|---|---|
| OCT 5 | 23.9°C | 21.0°C | |
| OCT 6 | 23.9°C | 21.0°C | |
| OCT 7 | 23.9°C | 21.0°C | |
| OCT 8 | 23.7°C | 21.0°C | |
| OCT 9 | 23.2°C | 21.0°C | |
| OCT 10 | 22.9°C | 21.0°C | |
| OCT 11 | 23.0°C | 21.0°C | |
| OCT 12 | 22.9°C | 21.0°C | |
| OCT 13 | 21.0°C | 22.2°C | |
| OCT 14 | 21.0°C | 22.2°C | |
| OCT 15 | 21.0°C | 22.1°C | |
| OCT 16 | 21.0°C | 22.0°C | |
| OCT 17 | 21.0°C | 22.0°C | |
| OCT 18 | 21.0°C | 21.9°C | |
| OCT 19 | 21.0°C | 21.8°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 | 4°C | 10°C | 15°C |
| February | 3°C | 9°C | 15°C |
| March | 9°C | 14°C | 20°C |
| April | 15°C | 19°C | 23°C |
| May | 17°C | 21°C | 25°C |
| June | 21°C | 26°C | 30°C |
| July | 26°C | 30°C | 33°C |
| August | 23°C | 27°C | 32°C |
| September | 22°C | 26°C | 30°C |
| October | 16°C | 21°C | 26°C |
| November | 9°C | 14°C | 19°C |
| December | 6°C | 11°C | 16°C |
Stone Mountain Lake: Water Temperature by Location
Stone Mountain Lake: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Stone Mountain Lake is a relatively small, shallow reservoir at Stone Mountain Park near Atlanta, so its water responds quickly to air temperatures. Typical seasonal surface temperatures run from about 40–50°F (4–10°C) in winter, rising to roughly 50–72°F (10–22°C) in spring as the water warms. During summer the lake often reaches its warmest range of roughly 75–85°F (24–29°C) on average, especially in July and August, while autumn sees a gradual cooling to around 55–70°F (13–21°C) depending on late-season weather. Local conditions, recent rainfall, and depth near different parts of the lake can cause short-term variations, with shallower shallows warming faster than deeper sections.
Despite the relatively mild to warm summer surface temperatures that might invite swimming, Stone Mountain Lake is not open for public swimming. Park regulations prohibit swimming for reasons including water quality monitoring practices, the absence of permanent lifeguard supervision, and potential underwater hazards in a recreational lake environment. Visitors can still enjoy the water from boats or the shoreline and take advantage of other park amenities, but entering the water for swimming is restricted to protect visitor safety and comply with park management policies.