Winter Niagara Falls vs Summer Niagara Falls: Winter is quieter and colder, summer has the full attractions

Summer gives you the full slate — Maid of the Mist, Cave of the Winds, crowds, and long lines. Winter keeps the park open 365 days but shuts down the boat and Cave of the Winds; the falls don’t freeze, but the mist creates a frozen wonderland with far fewer tourists. If you want the boat, go summer; if you want icicles and solitude, winter wins.