If you planning to travel to Grand Haven State Park, Grand Haven, Michigan, 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 1:10 PM. The temperature feels like 28.1 with a humidity level of 78 so dress accordingly. Cloud coverage is 90 percent with visibility at 12.1 percent. Today’s UV index is 1, don’t forget the sunscreen if you need it! Today’s winds are traveling northwest at a speed of 15 MPH. At the end of the day don’t miss the sunset at 10:11 PM.