Lyman Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lyman Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lyman Lake today is 20.3°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 | 23.3°C | 22.0°C | |
| OCT 6 | 22.7°C | 22.0°C | |
| OCT 7 | 22.2°C | 22.0°C | |
| OCT 8 | 22.7°C | 22.0°C | |
| OCT 9 | 21.7°C | 22.0°C | |
| OCT 10 | 21.9°C | 22.0°C | |
| OCT 11 | 21.9°C | 22.0°C | |
| OCT 12 | 20.9°C | 22.0°C | |
| OCT 13 | 22.0°C | 20.4°C | |
| OCT 14 | 22.0°C | 20.5°C | |
| OCT 15 | 22.0°C | 20.6°C | |
| OCT 16 | 22.0°C | 20.6°C | |
| OCT 17 | 22.0°C | 20.7°C | |
| OCT 18 | 22.0°C | 20.8°C | |
| OCT 19 | 22.0°C | 20.9°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 | 4°C | 8°C | 12°C |
| February | 3°C | 8°C | 12°C |
| March | 7°C | 12°C | 18°C |
| April | 14°C | 18°C | 23°C |
| May | 17°C | 21°C | 25°C |
| June | 21°C | 24°C | 27°C |
| July | 24°C | 27°C | 30°C |
| August | 23°C | 27°C | 30°C |
| September | 22°C | 26°C | 29°C |
| October | 17°C | 22°C | 27°C |
| November | 11°C | 16°C | 19°C |
| December | 7°C | 11°C | 14°C |
Lyman Lake: Water Temperature by Location
Lyman Lake: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Lyman Lake in South Carolina experiences typical seasonal surface temperatures for an inland Upstate reservoir. In summer, surface water commonly ranges from about 75–85°F (24–29°C), with shallow bays occasionally warming into the upper 80s°F (29–31°C) on hot, calm days. Spring temperatures generally climb from roughly 50–70°F (10–21°C) as the lake moves out of cooler winter conditions. During autumn the water cools back through roughly 55–75°F (13–24°C), and in winter surface readings commonly fall into the 40–55°F range (4–13°C), depending on air temperature and recent weather. These values can vary locally with depth, inflow, shading and recent rainfall, so short-term conditions will differ from seasonal averages.
As for swimming, Lyman Lake does not have a formally managed public beach with lifeguards, and recreational swimming is typically at the visitor’s own risk. Access around the shoreline can be a mix of public and private land, and authorities may restrict or discourage swimming after heavy rains because of runoff and potential water‑quality concerns. Submerged vegetation, sudden drop‑offs and boat traffic are additional safety considerations. Anyone planning to swim should check current local guidance, heed posted signs, and use appropriate precautions such as swimming in daylight, with a companion, and away from boating lanes.