IDW13130 Australian Government Bureau of Meteorology Western Australia Updated South West District Forecast Issued at 4:48 am WST on Sunday 21 December 2025 for the period until midnight WST Wednesday 24 December 2025. Warning Information For latest warnings go to www.bom.gov.au, subscribe to RSS feeds, call 1300 659 210* or listen for warnings on relevant TV and radio broadcasts. Weather Situation A ridge will develop across much of southern WA on Sunday, while a trough lies across the Interior. A weak front will brush the south coast on Monday, followed by the west coast trough returning by Tuesday. Forecast for the rest of Sunday 21 December Partly cloudy. Light winds becoming southerly 15 to 25 km/h in the middle of the day then becoming light in the late evening. Daytime maximum temperatures 22 to 28. Augusta Partly cloudy. Max 22 Bridgetown Cloud clearing. Max 26 Bunbury Sunny. Max 28 Busselton Mostly sunny. Max 28 Collie Sunny. Max 29 Manjimup Partly cloudy. Max 24 Margaret River Partly cloudy. Max 25 Fire Danger: Brockman: High Geographe: High Blackwood: Moderate Capes: Moderate Southern Forests: Moderate Sun protection 7:50am to 4:30pm, UV Index predicted to reach 13 [Extreme] Forecast for Monday 22 December Partly cloudy. Slight chance of a shower in the south in the morning. Near zero chance of rain elsewhere. Light winds becoming southeasterly 15 to 25 km/h in the morning. Overnight temperatures falling to between 11 and 15 with daytime temperatures reaching 22 to 29. Augusta Partly cloudy. Min 17 Max 23 Bridgetown Cloudy. Min 11 Max 25 Bunbury Mostly sunny. Min 13 Max 29 Busselton Partly cloudy. Min 12 Max 28 Collie Partly cloudy. Min 10 Max 29 Manjimup Cloudy. Min 12 Max 24 Margaret River Partly cloudy. Min 14 Max 26 Forecast for Tuesday 23 December Mostly sunny. Winds east to southeasterly 20 to 30 km/h. Overnight temperatures falling to between 10 and 14 with daytime temperatures reaching 26 to 33. Augusta Sunny. Min 14 Max 24 Bridgetown Mostly sunny. Min 12 Max 31 Bunbury Sunny. Min 15 Max 32 Busselton Sunny. Min 13 Max 34 Collie Sunny. Min 12 Max 33 Manjimup Cloud clearing. Min 11 Max 30 Margaret River Sunny. Min 12 Max 29 Forecast for Wednesday 24 December Sunny. Winds easterly 20 to 30 km/h. Overnight temperatures falling to between 12 and 16 with daytime temperatures reaching 32 to 37. Augusta Sunny. Min 15 Max 31 Bridgetown Sunny. Min 13 Max 35 Bunbury Sunny. Min 17 Max 34 Busselton Sunny. Min 15 Max 37 Collie Sunny. Min 13 Max 37 Manjimup Sunny. Min 13 Max 35 Margaret River Sunny. Min 15 Max 34 The next routine forecast will be issued at 1:25 pm WST Sunday. * Calls to 1300 numbers cost around 27.5c incl. GST, higher from mobiles or public phones. Copyright Commonwealth of Australia 2011, Bureau of Meteorology (ABN 92 637 533 532). Users of these web pages are deemed to have read and accepted the conditions described in the Copyright, Disclaimer, and Privacy statements (http://www.bom.gov.au/other/copyright.shtml).