If a sharp fall in the use of trains, buses and ferries last Friday is any guide, Sydneysiders scored a four-day weekend en masse last week through fair or foul means.

The latest data from the state's electronic Opal ticketing system shows a 19 per cent fall in trips on Sydney Trains and NSW TrainsLink to 167,148 between 7am and 9am last Friday, compared with the morning peak on the same day a week earlier.

And the number of trips on buses across Sydney, Wollongong and Newcastle fell even more – by over 21 per cent to 110,587 journeys during the morning peak last Friday.

While far smaller in size, journeys on Sydney's public ferries plunged by one-third to 3537.