Most of the largest events arranged at the Hamina Bastion event arena take place in the summer, because the event arena is then covered by the largest dismountable canopy in Europe. The canopy designed by Roy Mänttäri is erected in May and dismantled in September.
An average of 10 to 15 larger events are arranged within the Hamina Bastion annually. Recurring events include the International Military Music Festival Hamina Tattoo, Night of Lights, Christmas at the Old Arches, and various concerts. Other typical events comprise theatre, musicals and annual in-house events organised by associations and companies.
The Hamina Bastion is available for events throughout the year, because smaller parties and private occasions can be arranged in the heated facilities of the restaurant Linnoitusravintola Kamu!.
The Hamina Bastion has about 50,000 to 65,000 visitors annually.