Australian Government Bureau of Meteorology
Western Australia
TOP PRIORITY FOR IMMEDIATE BROADCAST
Heatwave Warning
Issued at 01:36 PM WST on Thursday 18 December 2025
Valid for Thursday 18 December 2025 to Sunday 21 December 2025
Warning for the following areas:
Pilbara and Eucla
Cancellation for the following areas:
South East Coastal, Goldfields, Great Southern and South Coastal
Safety Advice:
Severe heatwaves can be dangerous for many people, especially older people, babies, children, pregnant and breastfeeding women, people with medical conditions and people who are unwell.
Seek a place to keep cool, such as your home, a library, community centre or shopping centre.
Close your windows and draw blinds, curtains or awnings early in the day to keep the heat out of your home.
If available, use fans or air-conditioners to keep cool.
Temperatures over northwestern WA will range from the mid thirties to mid forties and overnight minimum temperatures in the mid to high twenties.
Although severe heatwave conditions have peaked over the Eucla after a cool change moved through Wednesday evening, heatwave effects will linger on Thursday before easing further on Friday.
Severe heatwave conditions have eased over the South Coastal, Great Southern, Goldfields and the South East Coastal districts.
The next heatwave warning will be issued by 2:00pm WST on Friday 19 December 2025
Forecast
Cowalellup (34.0953°S, 118.5516°E, 271m AMSL) set as my default location ›
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7 day forecast
Today: Partly cloudy. The chance of a thunderstorm in the E in the evening. Winds E/SE 20 to 30 km/h becoming light in the late evening. Overnight temperatures falling to between 11 and 14 with daytime temperatures reaching 24 to 30.
Forecast for Cowalellup (34.0953°S, 118.5516°E, 271m AMSL) Fri Sat Sun Mon Tue Wed Thu Summary 
Minimum 11° 13° 9° 10° 12° 12° 15° Maximum 28° 21° 25° 25° 26° 29° 35° Chance of rain 10% 30% 5% 10% 5% 5% 5% Likely amount < 1mm < 1mm < 1mm < 1mm < 1mm < 1mm < 1mm UV index Extreme Extreme Extreme Extreme Extreme Extreme Extreme Fire Danger Rating High High High High - - - Frost risk Nil Nil Nil Nil Nil Nil Nil 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm Wind speed 19
(km/h)13
(km/h)28
(km/h)29
(km/h)11
(km/h)16
(km/h)10
(km/h)23
(km/h)17
(km/h)22
(km/h)21
(km/h)24
(km/h)-
(km/h)-
(km/h)Wind direction E E SSW S SSE S S SSE ESE SE E ESE - - Relative humidity 52% 29% 56% 33% 46% 28% 55% 39% 56% 31% 49% 29% n/a n/a Dew point 9°C 9°C 9°C 4°C 6°C 6°C 10°C 10°C 10°C 7°C 9°C 9°C n/a n/a -
Sunrise and sunset times
Sunrise / Sunset for Cowalellup (34.0953°S, 118.5516°E, 271m AMSL) First light Sunrise Sunset Last light Moon rise Moon set Moon phase New moon First quarter Full moon Last quarter 4:21am WST 4:50am WST 7:15pm WST 7:45pm WST 3:40am WST 6:56pm WST 
Waning crescent
New moon Dec 20 First quarter Dec 28 Full moon Jan 03 Last quarter Jan 11 -
Warnings
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Temperature for next 7 days
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Rain for next 7 days
