Weather Forecast Myrtle Beach, SC Last Update: 9:05am Sep 3, 2010 EDT Today Tomorrow Sunday Monday Tuesday Wednesday Thursday Mostly Sunny Hi 96°F Lo 71°F Mostly Sunny Hi 89°F Lo 65°F Partly Sunny Hi 86°F Lo 70°F Mostly Sunny Hi 86°F Lo 70°F Sunny Hi 88°F Lo 71°F Slight Chance Thunderstorms Hi 88°F Lo 71°F Slight Chance Thunderstorms Hi 88°F Weather data provided by the National Weather Service