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 10:44 AM. The temperature feels like 84.55 with a humidity level of 78 so dress accordingly. Cloud coverage is 41 percent with visibility at 13.2 percent. Today’s UV index is 6, don’t forget the sunscreen if you need it! Today’s winds are traveling east at a speed of 16 MPH. At the end of the day don’t miss the sunset at 9:50 PM.