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 1:09 PM. The temperature feels like 7.15 with a humidity level of 71 so dress accordingly. Cloud coverage is 50 percent with visibility at 13.6 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 6 MPH. At the end of the day don’t miss the sunset at 9:56 PM.