On average, car rentals in Frankston, Melbourne cost around AUD $63.85 per day, with the lowest-priced rentals available from AUD $34.25 per day.
Save some coin by renting from Frankston instead of Melbourne's CBD or airport. It can be 10-20% cheaper for the exact same car.
Heading down in summer? Book your car early. Last-minute rentals during peak holiday times can get seriously expensive, if you can even find one.
If you need a car for 5 or 6 days, check the price for a full week. Sometimes the weekly discount makes it a better deal.
You don't need a massive SUV for Peninsula roads. A standard car will do the job just fine and leave more money for the wineries.
Book a rental so you can see:
Mornington Peninsula beaches – Dromana, Rosebud, Sorrento
Red Hill Wine Region – wineries, cellar doors
Peninsula Hot Springs – pools, spa
Arthurs Seat Eagle – gondola, viewpoints
Point Nepean National Park – quarantine station, fortifications
Sorrento & Ferry – car ferry, Queenscliff