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Is it too cold to swim in Lake Marion today?
The latest reading is 66°F (19.1°C), measured November 5, 2026 at 7:45 AM EST at Lake Marion near Pineville, SC. That is cold water.
Between 60°F and 70°F, which the National Center for Cold Water Safety rates as dangerous. It recommends a wetsuit or drysuit below 70°F. Temperature is only one factor: check rip current and surf alerts, and swim near lifeguards.
How cold is too cold to swim?Water temperature this week
Hourly water temperature at Lake Marion near Pineville, SC
Water temperature through the year
Average water temperature by month, satellite 2016–2025. Warmest in July.
Average water temperature by month
| Month | Average | Coldest year | Warmest year |
|---|---|---|---|
| January | 48°F | 45°F | 52°F |
| February | 49°F | 44°F | 56°F |
| March | 55°F | 52°F | 60°F |
| April | 64°F | 57°F | 67°F |
| May | 74°F | 72°F | 76°F |
| June | 81°F | 78°F | 83°F |
| July | 85°F | 84°F | 86°F |
| August | 84°F | 82°F | 86°F |
| September | 80°F | 78°F | 83°F |
| October | 71°F | 66°F | 76°F |
| November | 60°F | 54°F | 66°F |
| December | 50°F | 48°F | 53°F |
Other water temperature readings nearby
| Source | Water | Distance | Updated |
|---|---|---|---|
| NASA JPL MUR satellite nearest water | 66°F | 0.6 mi | Nov 3 |
Water temperatures nearby
Frequently asked questions
Is it too cold to swim in Lake Marion today?
The latest reading is 66°F (19.1°C), measured November 5, 2026 at 7:45 AM EST at Lake Marion near Pineville, SC. That is cold water. Between 60°F and 70°F, which the National Center for Cold Water Safety rates as dangerous. It recommends a wetsuit or drysuit below 70°F. Temperature is only one factor: check rip current and surf alerts, and swim near lifeguards. How cold is too cold?
When is the water warmest at Lake Marion?
Based on satellite data from 2016 to 2025, the water is warmest in July (average 85°F) and coldest in January (average 48°F).
Where does this water temperature come from?
From Lake Marion near Pineville, SC, a lake gauge operated by U.S. Geological Survey, 11 mi away. See the methodology.
Sources: U.S. Geological Survey; NASA JPL MUR satellite analysis; forecast and alerts from the National Weather Service. Readings are provisional. All South Carolina water temperatures · Methodology