Ocean Water Temperature: Average & Factors Influencing It

The average temperature of saltwater varies depending on the location and depth of the water. Generally, the surface temperature of the ocean ranges from about -2°C (28°F) in the polar regions to about 30°C (86°F) in the tropics. However, the temperature of the ocean can vary significantly with depth, as the deeper water is typically colder than the surface water. In addition, the temperature of the ocean can also be influenced by factors such as currents, upwelling, and the presence of sea ice.