Presquille is a great place in fall ...but depends upon how hot a summer for timing
Mid to late August, the warblers are coming thru there, and best seen there in early morning up at lighthouse area and along the road just north of lighthouse. They can be found throughout park but best there. Numbers are not that large as in spring and best if weather is cooler at nights and days, if weather is hot like this week..... numbers will be poor and only found early not making trip worth
Shorebirds start around mid August to end September, can be quite good but again depends upon how hot the summer and water levels.
Best to start at beach 1 , early 7-9, when no beach goers there, and walk up beach towards point. They rake the main beach so most birds are along shore early, unless some one or dog walkers have spoked them, you can only walk up so far until you come to the beach 3 where they rope off entrance. Some years the walk up can have lots of shorebirds, especially if it has rained and puddles on beach have formed.
Next spot would be to stop at general store and take the Owen point trail to point. This is the point where people walk out to the island, most of this area is roped off for protection of shorebird habitat until sept?

, not sure the date when they reopen it. Even with rope restrictions, this point is good for seeing shorebirds as area usually rocky and duckweed/ lake weeds for shorebird feeding....views of island are fair but really needs a scope to see birds over there, again best the early in morning
Next stop is lighthouse area and along road north of there, best 7-10 am... depending on temps
Then stop at cow pasture and marsh boardwalk areas
The pond along road going into campground along lake can be good too, with a day pass you can drive into campground, just keep following road along lake
Owls- park has a number of pairs of Barred owls, but seen mostly in winter, best place to look is Jobes woods, i never have time after doing other spots, and jobes woods is a fairly long trail
Park is larger then maps look, you need to drive from beaches to lighthouse and other spots, bicycle woukd help but still take too much time, need a car to make best of time
With the humid and heat we had this week , if summer is the same, i would recommend early September, not August. There would be less warblers but ....with hot summer the activity for warblers would be limited to 6-8am only.......but on other hand for me presquille is more about shorebirds for me not warblers.....if this is the main goal, best to try other places rondeau/ pelee