If you planning to travel to Fort Casey State Park, Coupeville, Washington, 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 3:00 PM. The temperature feels like 51.35 with a humidity level of 81 so dress accordingly. Cloud coverage is 53 percent with visibility at 11.8 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling southwest at a speed of 24 MPH. At the end of the day don’t miss the sunset at 12:46 AM.