Cross-wind landing thresholds depend on aircraft type. Most MEL-SYD flights tomorrow will operate with 737/A320 equipment which are rated for up to 35kt (65km/h) cross-wind landings. Either way RWY25 will be open.Wind direction is important. Wind is currently NW. Tomorrow it is West which is directly cross-wind for two runways. Could potentially cause some issues. Wind for tomorrow morning is still forecasted at +40km/h which is above the threshold for a cross-wind landing.
Just don't leave it too late, make sure you're booked on a flight leaving before 11 and you should make it even if they push you the next one along.