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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Aussie Report Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Williamstown SA is currently experiencing conditions as shown in the live forecast above, with temperatures ranging from the low single digits overnight to the mid-teens during the day. This inland location, approximately 40 kilometres north-east of Adelaide, typically sees a Mediterranean climate with cool, wet winters and warm, dry summers.
What is the typical weather pattern for Williamstown SA?
Based on long-term Bureau of Meteorology data, Williamstown’s July average maximum sits around 13–15°C, while January averages reach 28–30°C. Annual rainfall averages near 500–600 mm, with winter (June–August) being the wettest period. Frosts are common in winter mornings, while summer afternoons can bring hot northerly winds ahead of cool changes.
How does the live forecast compare to seasonal norms?
The live forecast above shows conditions aligned with the current season. For the most precise short-term outlook, refer directly to the Bureau of Meteorology for Williamstown’s hourly and seven-day predictions. Localised effects from the Mount Lofty Ranges can cause slightly cooler temperatures and higher rainfall than nearby Adelaide weather.
Does Williamstown SA get snow?
Snow is extremely rare at Williamstown’s elevation of 330 metres. Light snow or sleet may occur once or twice a decade during severe winter cold outbreaks, but it rarely settles. For snow, you’d need to head to higher parts of the Mount Lofty Ranges.
How does Williamstown weather compare to Gawler weather?
Williamstown is slightly cooler and wetter than Gawler weather due to its higher elevation and proximity to the Barossa ranges. Gawler, being lower and further west, typically records warmer daytime temperatures and less annual rainfall.
Where can I find the best Williamstown detailed weather forecast?
For the most reliable BOM weather Williamstown SA data, use the Bureau’s website or app. Third-party sites like Weatherzone and Elders also provide weather in Williamstown with hourly breakdowns and radar imagery for the region.