NSW South Coast water temp this year has exceeded what's gone on before.
At least where I live, Gerroa, which is two hours drive south of Sydney centre.
All of February we had 24C.
Right now it's 19C that's because of the constant NE winds we have had over the past 8 days.
Further out to sea the water is still 24+C.
No doubt the next Southerly will wash the warm stuff back in and we will back to 24C.

In the past the best you'd normally see is between 21-22C.
In the 70's through to 90's we could go all year and never make it above 20C.

Just wondering what's happening in your part of Oz?