A CYCLIST is in a serious condition after he slammed into a parked car in Wombarra this morning (Tuesday).

The 30-year-old cyclist was reportedly travelling at a high speed when he hit the parked car about 10.50am.

Ambulance crews were called to Morrison Avenue where they found the man unconscious and likely suffering a closed head injury.

The rescue helicopter was called and landed at Scarborough cemetery, before the cyclist was flown in a serious but stable condition to St George Hospital.