Black Hawk helicopters have been deployed over Perth as part of a month-long series of counter-terrorism exercises.

Two of the helicopters from the 6th Aviation Regiment flew over the city on Monday morning as part of the ADF's intensive training program.

Working with ground forces, including the Perth-based SAS Regiment, the helicopters will be involved in deploying troops on land and water, including by parachute.

Major Tony Cameron, from Army Aviation, said the exercises would involve the use of blank ammunition and simulated explosions, but steps had been taken to minimise disruption to residents in affected areas.

Most operations are due to take place during the afternoon but to maintain realism, some exercises may be conducted late at night or in the early morning.

Major Cameron said during night operations, the city lights would allow crews to use night-vision goggles in a more challenging urban environment.

The first two weeks of the operation will be conducted from Campbell Barracks at Swanbourne before moving out to near Pearce Air Base.

They will conclude on June 5.