Water Temp Perth

It all depends on what you r use too. I used to live in Perth, surfed in
the mornings (very early) with a short arm wetsuit, due to the wind chill.

The water temp is usually a few degree's cooler than Sydney. It's
pleasant and refreshing. Just watch the Sun, it's extremely intense.
There is very little humidity, therefore the sun is less filtered - Use
lots of Sun screen, good sunglasses and a wide brim hat. You will get
afternoon sea breezes, which can get strong. Get place for windsurfing
and kiting, WA is one of the best places in the world.

Great place is the west.