If you planning to travel to River Park Marina, Port Saint Lucie, Florida, 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 11:49 AM. The temperature feels like 60 with a humidity level of 74 so dress accordingly. Cloud coverage is 7 percent with visibility at 12.7 percent. Today’s UV index is 4, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southwest at a speed of 3 MPH. At the end of the day don’t miss the sunset at 10:27 PM.