I managed to visit only two Canadian cities in Montreal and Quebec. Located close to each other, they seemed completely different to me. If Quebec resembles a fallen asleep provincial French urban-type settlement, then Montreal is what you get, decide someone to connect New York with Paris, i.e. completely explosive mixture!
Good weather, warm sea, not crowded beaches - all this almost never converge on the Baltic coast. And already in the middle of autumn, and even more so. In this case, there should be a reserve plan for marking the vast Baltic coast. Polish three-cities-together-for a long time-one-agglomeration (ie Trójmiasto, ie “Tricities”) can provide such an opportunity.