The Port Sanilac Lighthouse is located in Port Sanilac, Michigan. Take Michigan 25 north from Port Huron. At the intersection of MI 25 and MI 46, turn right and drive toward the water. The lighthouse will be on your right. There is a marina with parking reserved for boat owners. If you head slightly south on Lake St and then turn east on Cherry, you can park at the end of the road and walk out on a breakwater for a better view. On a scale of 1 to 5 stars, we give it 3.5 stars.