A trough will briefly channel a warm airmass from the Pilbara towards the state’s southwest over the next couple of days.

The forecast top temperature on Thursday for Perth and Geraldton is 25 degrees and 28 degrees respectively, whilst on Friday the mercury could nudge above 30 degrees in Kalgoorlie.

These sorts of temperatures at this time of year equate to around 3-7 degrees above average in this part of the country.

Heat will be shunted away from the region from the middle of Friday, as a strong cold front moves in from the west, with maximum temperatures on Saturday as much as 10 degrees lower than Friday in some areas.

Gusty winds associated with the front will also make it feel 2-4 degrees colder than actual.