The next cool change for Sydney is expected late tonight (Saturday) into early Sunday, with a stronger, fresher southerly airflow and a noticeable drop in temperatures and humidity compared with today’s peak heat. Conditions should feel cooler and more comfortable during Sunday, especially in the afternoon and evening, though exact timing can vary suburb to suburb.

What “cool change” means today

  • A cool change in Sydney usually arrives with a southerly or south‑easterly wind shift after a hot northerly or westerly airflow.
  • It often brings lower temperatures, higher cloud, and a greater chance of showers or storms along the change line.

Timing for Sydney

  • Forecasts for early January show heat building to around the low 30s before a late change comes through, shifting winds on Saturday night.
  • By Sunday, daytime maximums ease back several degrees, and overnight minimums become less warm and muggy, so it should feel significantly more bearable.

How big will the drop be?

  • Typical drops with this type of change are on the order of 5–10 °C off the late-afternoon peak, especially near the coast where the southerly bites first.
  • Inland western suburbs can stay hotter a bit longer, with the cooler air and cloud taking extra time to arrive.

What to watch for

  • Watch live radar and official local forecasts this evening for the exact arrival of the wind shift in your suburb.
  • If you are near the coast, you will usually feel the cool change earlier than those further inland, especially on hot summer days like this.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.