Report out.
https://www.atsb.gov.au/media/577998...nal-report.pdf
“The ATSB found that although the flight crew had conducted a pre-flight briefing, they did not detect the forecast deteriorating weather in the Warrnambool area. In addition, they did not assess the aerodrome forecast for both Moorabbin and Warrnambool to ensure they were suitable destination airports. The aircraft departed Warrnambool in visual flight conditions however, as forecast, the weather subsequently deteriorated and the flight crew initiated a return to Warrnambool. During the return, the conditions reduced below that required for visual flight resulting in the VFR certified aircraft entering instrument meteorological conditions (IMC).
After entering IMC, the pilot requested assistance from the controller and maintained control of the aircraft.”