Compare Matthew 8:18
One of the most memorable stories in the gospels.
“What sort of man is this, that even winds and sea obey him?”
Indeed.
Jesus shows in this episode that he possesses the powers that had once been ascribed to the ancient storm god Ba‘al, who had been such a temptation to the ancient Israelites but was now defunct and essentially forgotten.
Lake Tiberias, Kinnereth, or the Sea of Galilee is prone to storms, for reasons explained here. They may not be quite as spectacular, typically, as that depicted by Rembrandt in the painting above. But then, the boat in which Jesus and his disciples were traveling was almost certainly a more humble thing, too. And, to make things worse, the disciples may have been unable to swim. (Surprisingly, many pre-modern sailors couldn’t.)
Here and here are amateur videos (each roughly a minute long) of stormy days on the Sea of Galilee, which is normally quite a placid lake.