Definitely!
Even if the weather charts predict fine weather, it is a wise couple that has a contingency plan in place.
It may not be needed but this is after all, Australia where whilst the climate is generally moderate we can experience wind, extreme heat, cold etc.
Remember too, that February is the hottest month of the year when 20 minutes in the sun can cause burning; that there is plenty of rain in Spring; strong winds in August, and it can get pretty cold in June.
