Abstract: Characteristics of sea breeze over the south coast of Nigeria were studied. The study used hourly wind (speed and direction) and temperature data for 5 years (1979-1983) over four coastline stations in Nigeria (Lagos, Warri, Port-Harcourt and Calabar) to examine various characteristics of the sea breeze. The spatially average strength (speed) of the sea breeze is about 2ms 1. Sea breeze occurrences are most frequent in the months of November-April. The results show that sea breeze usually starts as a light onshore surface wind few hours after the sunrise and has a mean duration of about 11 h. The mean onset and cessation time are 1200 and 2200 h, respectively. Average daily hodographs for the stations reveal that the sea breeze circulation is both clockwise and anticlockwise in rotation.