Blue Hill Bay Light

Blue Hill Bay Light is a lighthouse standing on Green Island in Maine with a white cylindrical tower and connected keeper's house forming a single maritime structure. The tower rises about 21 feet (6 m) above the rocky terrain and includes all the basic elements needed to support daily operations on the island.

The original structure was built in 1857 when lumber shipping dominated the region and safe passages were critical for trade. As the economy shifted away from timber processing, the light remained an important guide for mariners and commercial vessels.

The lighthouse serves as a visual landmark that shapes how sailors and local fishermen navigate these waters and relate to the bay. Its presence on Green Island reflects the maritime heritage that defined daily life for generations of people living along this coast.

The light flashes blue every 4 seconds and remains visible from about 5 nautical miles (9 km) away, helping boats orient themselves on the water. The best views come from the water itself or from nearby coastal vantage points during early morning or late afternoon.

At low tide, exposed rock ledges connect Green Island to nearby Flye Island, creating a natural walkway that appears and disappears with the tides. This temporary passage only becomes accessible for a few hours each day and offers an unusual way to explore the surrounding islands.