Obviously the sea is wet. Water is less affected in terms of temprature than land mass, it is more equable, therefore it makes summers less hot & winters less cold in areas of land which are closer to the Oceans.
The water evaporates on the surface of the ocean and it is been carried away by the sea breeze to the land. As humidity is the amount of water vapor present in the air, it will be very high. When...
The oceans are a great heat sink (the sun warms them up during the day and the water releases its heat at night). Evaporation provides humidity for rain.