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Adelaide and Melbourne could reach 40 degrees midweek

Source Weatherzone Sun 04 Jan 2026

Intense heat is currently building over Western Australia and this hot air mass will shift slowly eastward this week, with temperatures possibly reaching 40 degrees in Adelaide and Melbourne midweek. A slow-moving upper-level ridge is currently positioned over Western Australia and this feature will allow intense heat to build over WA during the next few days, with daytime temperatures in the 40s expected to become widespread across much of the WA interior on Sunday, Monday and Tuesday. By Wednesday, the upper-level ridge and associated hot air mass will shift eastward over southeast Australia, potentially bringing 40-degree heat to Adelaide and Melbourne. Image: Forecast maximum temperatures on Wednesday, 7 January 2026. Source: Weatherzone While Wednesday stands out as the hottest day of the week for both Adelaide and Melbourne, there is a chance that Adelaide could reach 40 degrees again on Thursday with the hot air mass expected to linger over SA's south. Make sure to stay hydrated and "Slip, Slop, Slap" during this week’s heatwave, and don’t forget to check the latest forecasts for Adelaide and Melbourne. - Weatherzone © Weatherzone 2026