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 10:25 AM. The temperature feels like 86.6 with a humidity level of 84 so dress accordingly. Cloud coverage is 35 percent with visibility at 12.7 percent. Today’s UV index is 7, don’t forget the sunscreen if you need it! Today’s winds are traveling southwest at a speed of 8 MPH. At the end of the day don’t miss the sunset at 9:43 PM.