It extends from the highest peaks of the Blue Mountains, 2,256 metres (7,402 ft) above sea level, down to the north coast, and is noted for its fertile soil, scenery, and beaches.

[citation needed] The parish lies in the direct path of the northeast trade winds, and the Blue Mountain ridge to its south traps the moisture.

Port Antonio, its chief town and capital, has two harbours, the western one being sheltered by a small islet, Navy Island.

The parish has a variety of complex landforms; the entire coastline is dotted with caves, bays, rivers, waterfalls and hills.

The parish is a leading producer of bananas, coconuts, breadfruits, coffee, mangoes and ackee which are grown for export as well as local consumption.

Portland has very rich land on its coastal strips that is suitable for any kind of cultivation, so many domestic crops are grown.

Scenes from the film Cocktail, starring Tom Cruise, were shot at the bar on the beach at the Dragon Bay resort.