If you planning to travel to Pier 4, San Juan, Puerto Rico, 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 10:30 AM. The temperature feels like 87.1 with a humidity level of 87 so dress accordingly. Cloud coverage is 63 percent with visibility at 11.6 percent. Today’s UV index is 5, don’t forget the sunscreen if you need it! Today’s winds are traveling east-southeast at a speed of 8 MPH. At the end of the day don’t miss the sunset at 9:43 PM.