If you planning to travel to Thunder Bay National Marine Sanctuary, Alpena, 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 10:15 AM. The temperature feels like 49.95 with a humidity level of 88 so dress accordingly. Cloud coverage is 84 percent with visibility at 7 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling northeast at a speed of 4 MPH. At the end of the day don’t miss the sunset at 12:46 AM.