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 10:59 AM. The temperature feels like 74.75 with a humidity level of 85 so dress accordingly. Cloud coverage is 70 percent with visibility at 9.4 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling northeast at a speed of 14 MPH. At the end of the day don’t miss the sunset at 11:32 PM.