Just East South East of Isle Madam is Green Island. Just under 200m in diameter, Green Island has been a valuable point of Navigation for the area, bearing the only lighthouse guiding the way into St Peter's Bay. The south side of Green Island drops off like a wall to a depth of 45m immediately, before it continues downward to a max depth of around 90m. The wall itself is covered with kelp and tang, the rocky bottom is covered with anemones. You can see the Pearch hovering in the free water in the mild current, while the bigger creatures are closer to the rocks. Following down the wall, you will see many different sponges, sea stars and anemones. On the way to the dive spot we often see seals and other mammals, but there has also been sightings of Leatherback Turtles, Sunfish and Greenland Shark.

On the East Side of Green Island you will dive through some canyon formation in just 10 - 20m of depth. Glide through those impressive rock formation and watch the kelp. Here you will also find smaller critters like nudibranches.