Lake Marion — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Marion, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Marion today is 27.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 23 | 25.7°C | 26.1°C | |
| JUN 24 | 25.7°C | 26.1°C | |
| JUN 25 | 25.8°C | 26.1°C | |
| JUN 26 | 27.5°C | 26.1°C | |
| JUN 27 | 27.5°C | 26.1°C | |
| JUN 28 | 27.0°C | 26.1°C | |
| JUN 29 | 27.2°C | 26.1°C | |
| JUN 30 | 27.6°C | 26.1°C | |
| JUL 1 | 24.4°C | 27.4°C | |
| JUL 2 | 24.4°C | 27.3°C | |
| JUL 3 | 24.4°C | 27.1°C | |
| JUL 4 | 24.4°C | 27.0°C | |
| JUL 5 | 24.4°C | 26.8°C | |
| JUL 6 | 24.4°C | 26.6°C | |
| JUL 7 | 24.4°C | 26.5°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 | 11°C | 16°C |
| February | 6°C | 11°C | 16°C |
| March | 8°C | 14°C | 20°C |
| April | 14°C | 19°C | 24°C |
| May | 18°C | 22°C | 26°C |
| June | 20°C | 26°C | 32°C |
| July | 22°C | 24°C | 27°C |
| August | 24°C | 29°C | 34°C |
| September | 23°C | 28°C | 32°C |
| October | 19°C | 24°C | 28°C |
| November | 13°C | 17°C | 20°C |
| December | 9°C | 12°C | 15°C |
Lake Marion: Water Temperature by Location
Lake Marion: Weather Forecast
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Location & Local Information
Lake Marion, a large reservoir in central South Carolina, experiences a wide range of surface water temperatures through the year. In summer months (June–August) surface temperatures commonly reach about 75–90°F (24–32°C), with the warmest afternoons sometimes topping the low 90s°F (around 32–34°C). Spring (March–May) is transitional, generally running roughly 55–75°F (13–24°C) as the water warms, while fall (September–November) cools from about 60–80°F (16–27°C). Winter surface temperatures (December–February) typically drop to the 40–55°F range (4–13°C), though short cold snaps can push readings lower. These values can vary with weather, depth, and local conditions such as wind and incoming river flows.
Swimming is allowed in portions of Lake Marion, particularly at developed sites like state park beaches and managed recreation areas, but much of the shoreline is not a designated swim beach. Visitors should be aware there are limited lifeguards, heavy boat traffic in many areas, and underwater hazards such as stumps and variable drop-offs. Water quality and occasional algal conditions can also affect safety and suitability. For those choosing to swim, selecting designated swimming areas, observing posted advisories, and exercising caution around boats and submerged hazards will make the activity safer.