I'm going back to the Portland area in a couple of weeks. I've been there several times, but never this late in the season.
Some things I'm curious about
1)blueberry picking in Kennebunk Plains (Kennebunk Barrens) or somewhere else nearby
2)"best" lighthouse to see north of Portland, no more than about 90 minutes north
(i'm pretty sure I've seen all the ones from the ME/NH border to Portland.

I will go to the Bowdoin College art museum, and If I have enough time another day, up to the Farnsworth. I've been to the Bath Maritime museum, and shopping in Freeport, but nothing else in that direction. Any other suggestions of sights, views, things to do and see within 90 minutes north of Portland?

Here's a PYO site. It's not clear if blueberries at some are available into Sept. Suggest you call places in York county.

If you go to the Farnsworth, you can visit Owls Head Light. Easy, short hike and very nice views once you get there. And have lobster lunch at Waterman's Beach (very rustic, picnic table dining).

We're headed to Portland in late September and planning to do a food tour.

I would go on one of the lighthouse cruises scheduled by the Bath Maritime Museum. Years ago we went on a full day trip and it was great. Great narration.

Topping, because I should know better than to post a new question here on the weekend!

Trying once more

(and thanks, dfrostnh )

If you like zoos, I really enjoyed the Maine Wildlife Park in Gray which wasn't far from Portland. Could go to the Allagash and Shipyard Breweries