7 day weather forecast

Effective as of 12:00 AM Wednesday December 22 2021

View the latest severe weather warnings from BOM at http://www.bom.gov.au/wa/warnings/ .

Explanatory notes:

Some elevated convection occurred yesterday morning with further isolated activity in the southeast in the afternoon associated with instability aloft ahead of an upper level trough. That activity contracted away as the upper level trough moved to the east.

Fine conditions with afternoon sea breezes with the west coast trough inland today and on Thursday.

An unusually intense heatwave, possibly Perth's worst December heatwave on record is increasingly likely from Christmas Eve as a very hot air mass lies over the region with the west trough deepening and lying offshore for several days and an upper level high leading to subsidence heating of the airmass. Temperatures could even be hotter than currently forecast as the current forecast is a little conservative taking into account uncertainty this far out. Perth's longest December 40+°C spell on record was 3 consecutive days in December 2019. Prior to December 2019, 3 consecutive 40+°C days was underheard of in December

Wednesday December 22:

City:

18-32  Degrees Celsius

Sunny.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Sunny.Winds southeasterly at 10-20 km/h tending south-southwesterly at 20-30 km/h in the afternoon and evening.

Thursday December 23:

City:

20-35  Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Mostly sunny.Very hot inland.Winds east-southeasterly at 10-25 km/h tending south-southwesterly a 20-30 km/h in the afternoon and evening becoming southeasterly at 20-30 km/h later at night.

Friday December 24:

City:

22-39  Degrees Celsius

Very hot and sunny.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Very hot and sunny.Winds easterly at 20-30 km/h tending northeasterly at 10-20 km/h by late morning, south-southwesterly at 20-30 km/h in the afternoon.

Saturday December 25:

City:

24-43  Degrees Celsius

Very ho ho hot and sunny.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Very ho ho hot and sunny.Winds east-northeasterly at 20-35 km/h tending northeasterly at 10-20 km/h in the afternoon, easterly at 15-25 km/h at night.

Sunday December 26:

City:

27-43  Degrees Celsius

Very hot and mostly sunny.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Very hot and mostly sunny.Winds east-northeasterly at 20-30 km/h tending easterly at 10-20 km/h in the afternoon, 15-25 km/h at night.

Monday December 27:

City:

26-41  Degrees Celsius

Very hot and mostly sunny.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Very hot and mostly sunny.Winds east-northeasterly at 20-30 km/h becoming light in the afternoon.

Tuesday December 28:

City:

24-39  Degrees Celsius

Very hot and mostly sunny.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Very hot and mostly sunny.Winds northeasterly at 10-20 km/h tending south-southwesterly at 10-20 km/h in the afternoon, light at night.

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