Lake Blalock — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Blalock, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Blalock today is 21.9°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 11 | 22.2°C | 22.5°C | |
| OCT 12 | 21.6°C | 22.5°C | |
| OCT 13 | 21.4°C | 22.5°C | |
| OCT 14 | 21.6°C | 22.5°C | |
| OCT 15 | 21.1°C | 22.5°C | |
| OCT 16 | 21.6°C | 22.5°C | |
| OCT 17 | 21.3°C | 22.5°C | |
| OCT 18 | 21.9°C | 22.5°C | |
| OCT 19 | 22.5°C | 21.9°C | |
| OCT 20 | 22.5°C | 22.0°C | |
| OCT 21 | 22.5°C | 22.0°C | |
| OCT 22 | 22.5°C | 22.0°C | |
| OCT 23 | 22.5°C | 22.1°C | |
| OCT 24 | 22.5°C | 22.1°C | |
| OCT 25 | 22.5°C | 22.1°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 | 3°C | 8°C | 12°C |
| February | 3°C | 8°C | 12°C |
| March | 7°C | 13°C | 20°C |
| April | 14°C | 18°C | 23°C |
| May | 18°C | 22°C | 26°C |
| June | 21°C | 25°C | 29°C |
| July | 24°C | 27°C | 31°C |
| August | 24°C | 27°C | 30°C |
| September | 23°C | 26°C | 29°C |
| October | 18°C | 23°C | 27°C |
| November | 13°C | 16°C | 19°C |
| December | 7°C | 11°C | 14°C |
Lake Blalock: Water Temperature by Location
Location & Local Information
Lake Blalock, a reservoir in upstate South Carolina, shows typical seasonal surface temperatures for a southeastern U.S. impoundment. In summer the water commonly warms into the mid-70s to mid-80s °F (around 24–30 °C), with the warmest days occasionally pushing temperatures into the upper 80s °F (about 31 °C). Spring sees a steady rise from roughly 50–70 °F (10–21 °C) as the system stratifies, while autumn cools back to about 60–75 °F (15–24 °C). Winter surface temperatures usually fall into the 40–55 °F range (4–13 °C), although brief warm spells or cold snaps can shift those values. Deeper water tends to remain colder year-round, so there can be significant temperature differences with depth and location on the lake.
Swimming at Lake Blalock is practiced by visitors but is subject to local rules and safety considerations. Some shore areas and coves are used for swimming because the lake is publicly accessible for recreation, yet there are no universal lifeguards and sections near boat channels, intake structures or steep drop-offs are unsafe. Because the reservoir also serves water-supply and flood-control functions, posted restrictions, seasonal advisories or prohibited zones can apply; swimmers should follow signage and local guidance, be mindful of cold-water shock in cooler months, and avoid areas with heavy boat traffic.