Home › Weather › Williamstown Sa Weather
Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Australia Voice Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Check the live forecast above for Williamstown, SA, to plan your day. This Barossa Valley town sees cool mornings and warm afternoons, typical of South Australia’s Mediterranean climate, with clear skies often giving way to afternoon cloud.
What is the typical weather pattern for Williamstown, SA?
Williamstown sits in the Barossa Valley, about 50 kilometres north-east of Adelaide. Its weather follows a dry-summer, cool-winter pattern. Summer days often reach the low 30s Celsius, while winter highs stay around 12–15°C. Overnight frosts are common in winter, especially after clear skies. The area receives most rain between May and September, averaging about 500 millimetres annually.
How does the live forecast help with local planning?
The live forecast above shows today’s temperature range and wind. For Williamstown, wind tends to be light in the morning, picking up from the west or south-west in the afternoon. This affects outdoor work and vineyard activities. Use the forecast to decide on garden watering, firewood stacking, or a drive to nearby towns like Gawler or Adelaide.
Does Williamstown get hot in summer?
Yes, summer highs often reach 30–34°C, but nights cool to around 15°C. The dry air and low humidity make the heat feel steady, not muggy. Check the live forecast above for any heatwave warnings.
Is wind a problem in Williamstown?
Wind is usually moderate, with afternoon gusts from the west or south-west. It can pick up during spring, but winter winds are lighter. The live forecast above shows wind speed and direction for your day.
Where can I find detailed weather for Williamstown?
For detailed weather and Yarra Valley or Beechmont comparisons, check our local pages. The Bureau of Meteorology provides official BOM data for Williamstown.