I knew you were talking Celcius (Kelvin) when I saw you were from Down Under.
OK, so you are about to go into your winter there and the temps should be dropping which is great for lagers.
What I've done in the past is move the ales closer to the water heater (or furnace) and monitor the temp using the adhesive thermometer strip. You don't even have to permanetly adhere it to the fermenter. Just set it on top or use tape to hold it to the side instead.
If the brews temp goes too high move it away from the heat source about a foot or so until the fermenter is within a good temp range for the style.