Why did Jesus do nature miracles?
N.T. Wright (Jesus and the Victory of God) points out that in addition to the healing miracles of Jesus, we find him exercising power over the natural order, as with the miraculous catch of fish, the stilling of storms, feeding of multitudes in the desert, and (negatively) the cursing of a fig tree.
In these actions, Jesus is demonstrating his power to bring the natural order into ‘a new harmony with itself’ in ways that had only occasionally been glimpsed previously, as with the crossing of the Red Sea.
‘In all of these,’ (says Wright), ‘as in the ‘mighty works’ as a whole, what was ‘seen’ within the first-century Jewish worldview would be the restoration of creation, which Israel had expected to happen when her god became her king and she was vindicated by him.’