It looks good, though I believe you forgot the reflection of the water on the ocean.
The further something is from the viewer the more blurred and lighter the colours become, you do this very well, but you seem to have forgotten the horizon, it is a very sharp change from water to sky.
I like the rays of sunlight breaking trough the leaves of the trees and the clouds look really good.
Where is the light coming from though, it is confusing me a little. The rocks and some trees indicate the sun comes from the top right. But 1 tree has light coming in from the top left.
(sorry to nag about these details, I feel like a jerk. Though I hope it helps you a little in future works)