If you planning to travel to Lake Marion, Santee, South Carolina, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 11:54 AM. The temperature feels like 56.599999999999994 with a humidity level of 79 so dress accordingly. Cloud coverage is 2 percent with visibility at 12.5 percent. Today’s UV index is 4, don’t forget the sunscreen if you need it! Today’s winds are traveling west at a speed of 3 MPH. At the end of the day don’t miss the sunset at 10:18 PM.