Typically highs in the low 70s, and lows in the low 50s. While it might be beautiful during the day, definitely bring something to keep you warm at night. It is Maine, however, so we also suggest keeping a watch on the weather leading up to the weekend.
Dress for the wedding day will be cocktail attire. Ladies can wear cocktail dresses, dressy jumpsuits, etc. Men can wear dark jackets and slacks. Tie is optional with a jacket.
Yes, there will be an open bar.
The streets and sidewalks of Old Port are lined with brick, some uneven. If you will be exploring town, we highly suggest wearing flat, comfortable shoes to get around. Ladies - heels are doable, but they'll be tough in certain spots! For a night out / the wedding day, you might want to bring a pair of flats to change into for any walking.