A vehicular alert system includes at least one sensor disposed at a vehicle and sensing exterior of the vehicle. The at least one sensor captures sensor data. Electronic circuitry of an electronic control unit includes a processor for processing sensor data captured by the at least one sensor to detect presence of objects viewed by the at least one sensor. The vehicular alert system, responsive to determining a likelihood that the vehicle is parking, tracks a position of a detected object until the object leaves a field of sensing of the sensor. The vehicular alert system predicts a position of the object relative to the vehicle and determines the object is a hazard based on the predicted position. The vehicular alert system, responsive to determining that the detected object is a hazard, alerts an occupant of the vehicle of the detected object.