If you planning to travel to Fort Moultrie National Monument, Sullivans Island, 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 11:52 AM. The temperature feels like 58.8 with a humidity level of 74 so dress accordingly. Cloud coverage is 18 percent with visibility at 12.3 percent. Today’s UV index is 4, don’t forget the sunscreen if you need it! Today’s winds are traveling east-southeast at a speed of 4 MPH. At the end of the day don’t miss the sunset at 10:16 PM.