Is salinity the oceans highest at the equator?

Sea Surface Temperature: The temperature of the sea surface is high (27-30°C) near the equator, often the maximum value occurs a few degrees of latitude north of the equator and low (at the sea water freezing point of 1.9°C) within the polar oceans. read more

No, high precipitation at the meterological equator lowers surface water salinity. The meterological equator is also the intertropical convergence zone that migrates seasonally with the passing of the sun from south to north of the equator, but averages about 5–10°N. read more

Salinity of oceans is highest between 20 degrees to 30 degrees North and South latitudes as the rate of evaporation is very high there due to high temperature and low humidity. Temperate oceans have lesser salinity due to lower temperature and thus lower rate of evaporation. read more

Therefore, the most likely contributor to decrease salinity of the ocean at the equator is an increase water volume. At the equator, there is high rainfall and consequently, a large number of days during which the sky is cloudy. read more