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 10:22 AM. The temperature feels like 99.2 with a humidity level of 83 so dress accordingly. Cloud coverage is 30 percent with visibility at 11.8 percent. Today’s UV index is 10, don’t forget the sunscreen if you need it! Today’s winds are traveling southwest at a speed of 10 MPH. At the end of the day don’t miss the sunset at 12:29 AM.