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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Down Under Brief Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
For O’Halloran Hill this morning, the live forecast above shows a mild, partly cloudy start typical of the Adelaide foothills, with a light north-easterly breeze keeping humidity moderate ahead of the afternoon sea-breeze shift.
What is the weather in O’Halloran Hill today?
O’Halloran Hill, perched on the southern edge of Adelaide’s Mount Lofty Ranges, sees a mix of coastal and inland influences. The live forecast above indicates a maximum in the low-to-mid 20s Celsius, with cloud building from the west during the afternoon. A weak trough passing to the south may trigger a late shower, but most of the day stays dry. Winds turn south-westerly by mid-afternoon, dropping temperatures a couple of degrees near the coast.
How does O’Halloran Hill’s location shape its weather?
At about 120 metres elevation, the suburb catches the first of the sea-breeze from Gulf St Vincent, often making it a few degrees cooler than central Adelaide. In winter, fog can settle in the valley floors to the east, but the hill itself tends to clear earlier. Summer afternoons are tempered by the gulf breeze, though hot northerly days push temperatures above 35 °C before the change arrives.
Does O’Halloran Hill get foggy?
Yes, especially in late autumn and winter when moist air from the gulf meets the cooler hill slopes. Fog typically burns off by mid-morning, but can linger in the adjacent Happy Valley basin until early afternoon under high pressure.
Is it windier than central Adelaide?
Generally yes. The hill’s exposed south-western side catches the full force of afternoon sea-breezes and winter fronts. Gusts can exceed 50 km/h several times a year, though the suburb’s northern slopes are more sheltered.
What’s the best season to visit?
Autumn (March–May) offers stable, mild days with low humidity and less chance of the summer heatwaves or winter rain. Spring can be changeable with strong northerly winds ahead of cold fronts.