The Atlantic Ocean is the saltiest of the five ocean basins. The normal range for salinity in oceans is between 33 and 37 grams per liter. Salinity is typically close to 35 grams of dissolved salts in each liter of water.
The Atlantic Ocean is the saltiest, but the Red Sea and the Persian Gulf region have some of the saltiest locations due to very high evaporation rates and the fact that there is little freshwater inflow. The ocean is saltiest where the evaporation rate is the highest. For example, the salinity near the equator is distinctly lower than at both poles.