Helena L. Kjeldsen

Events In Seattle September 2025. The best things to do in seattle this month: Two of the biggest events in seattle take place on september 14 and 15, with the fiestas patrias parade in south park on saturday and fiestas patrias sea mar at seattle.

Log in to set reminders, like events and restaurants, create your own lists of all your favorite things, make plans with. 2025 is a banner year for big events in seattle.