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 12:03 PM. The temperature feels like 72.5 with a humidity level of 89 so dress accordingly. Cloud coverage is 65 percent with visibility at 9.9 percent. Today’s UV index is 4, don’t forget the sunscreen if you need it! Today’s winds are traveling west-southwest at a speed of 5 MPH. At the end of the day don’t miss the sunset at 10:30 PM.