In ancient Greek mythology, the patron god of sailors and the sea is Poseidon. He wields immense power over oceans and storms and is often associated with earthquakes and horses. Sailors prayed to Poseidon for safe voyages and favorable conditions, highlighting the importance of the sea in Greek culture and economy. Temples dedicated to him served as places of worship and offered rituals to honor his might. This relationship emphasizes humanity's reliance on and respect for nature's forces, showcasing the profound impact of climatic elements on ancient Greek society and its mythology.