 Geographically, the Port of Port of Spain is ideal for maritime traffic, providing a natural harbour on Trinidad's north-western coasts where adverse weather conditions are extremely rare.Unlike Chaguanas and San Fernando, Port of Spain has a cool climate due to elevation and the surrounding Northern Range mountains.In the high, misty valleys and mountains that surround the northern outskirts of the city, temperature inversion is quite frequent and the mountains provide a cooling relief from the sweltering heat below.