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 84 with a humidity level of 84 so dress accordingly. Cloud coverage is 61 percent with visibility at 8.9 percent. Today’s UV index is 7, don’t forget the sunscreen if you need it! Today’s winds are traveling east at a speed of 6 MPH. At the end of the day don’t miss the sunset at 9:43 PM.