How does the wind work, and why does it blow from certain directions at certain times of the year?
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Basically, wind blows from a high pressure system to a low pressure system.
During the summers, the land is hotter than the sea and consequently, the air over the land is hotter than the air over the sea. Hot air rises and cold air is lower to the surface. When hot air over the land rises up, the cold air over the water moves to fill the space that the hot air left behind. This is what wind is, essentially. This wind, by virtue of being over the sea, brings humidity and causes rain.
In the winters, the air over the sea is warmer than the air over the land. The reverse phenomenon of the above follows.
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