Click for info. Myrtle Beach, located in Horry County, is a part of South Carolina's Grand Strand. From June through early October water temperatures are practically tropical making this area perfect for swimming and beach activities.
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The water at beaches in North Carolina and South Carolina stays warm enough from May to mid-October for most people to enjoy swimming.
From June through early October water temperatures are practically tropical making this area perfect for swimming and beach activities. The water cools significantly during the winter months due to cold offshore winds and longer nights.
The water temperature averages between 72 and 76 degrees, a refreshing temperature for splashing in the waves or enjoying a swim. Book a stay at your favorite Myrtle Beach hotel or resort and take advantage of the pleasant October weather, whether you want to frolic in the sea or swim in an oceanfront pool.
That year, a total of 23 beaches were tested for fecal indicator bacteria in the state of South Carolina. Out of four tested counties in South Carolina, the average percentage of potentially unsafe days in South Carolina by county in 2020 ranked Beaufort County as the second safest.
Sea TemperatureSurface water temperature in December at the beaches near Charleston is around 64-68°F (17-21°C), which most people will find too cold for swimming but is still acceptable for some watersports on warmer days.
Best Times to Visit South Carolina for Good Weather“From late April to early June and early September to late October, you'll get all the benefits of warm weather without it being too overbearingly humid.” It may not be swimming weather, but the colder months can be a great time to visit, too.