Fall and summer? In OoA? I didn't really get what you meant.
It does show the ocean getting smaller after the flood. Look at the east-most part of the maps.
In
this thread i was able to prove the connections between all games geographically. You can have a good idea on the distance between Labrynna and Hyrule proper by looking at the maps and reading the text.
Those OoA maps are enough to prove that the Great Deku Tree plan of draining/deflooding the land by planting more trees worked and that it covered other lands too. Please notice that all land that "grew" in ooa has woods on top...