If you planning to travel to Shelter Island, San Diego, California, 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 2:27 PM. The temperature feels like 57.9 with a humidity level of 86 so dress accordingly. Cloud coverage is 51 percent with visibility at 12 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling southwest at a speed of 5 MPH. At the end of the day don’t miss the sunset at 12:43 AM.