Fortuneswell is the largest of eight villages on the Isle of Portland, just off the coast of Dorset in the English Channel. The village lies on steeply sloping land on the northern edge of the island (Underhill), where Chesil Beach, the tombolo which connects the island to the mainland, joins the island.
The village has a main shopping street with several shops. The nearby villages of Chiswell and Castletown almost merge into Fortuneswell, as they share the limited space on the northern slopes of the island. However, Fortuneswell occupies the steepest land far above sea level, whereas Castletown and Chiswell occupy flat land close to sea level, next to Portland Harbour and Chesil Beach respectively.