If you planning to travel to Sapphire Beach, St. Thomas, U.S. Virgin Islands, 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 10:04 AM. The temperature feels like 94.45 with a humidity level of 81 so dress accordingly. Cloud coverage is 52 percent with visibility at 14.2 percent. Today’s UV index is 11, don’t forget the sunscreen if you need it! Today’s winds are traveling east-northeast at a speed of 14 MPH. At the end of the day don’t miss the sunset at 10:40 PM.