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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Aussie Pulse Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The Blue Mountains weather is typically cooler and more variable than Sydney’s, with the live forecast above giving today’s conditions. Even in summer, the high elevation brings mild days and crisp nights, while winter often delivers frost, fog and occasional snow.
What drives the Blue Mountains climate?
The elevation — from around 200 metres in the valleys to over 1,100 metres on the ridges — is the key factor. For every 100 metres climbed, the temperature drops roughly 0.6–0.8°C. This means the weather in Blue Mountains tomorrow can feel very different from the coast. Rainfall is spread throughout the year, but the western slopes tend to be drier. Fog is common in the cooler months, especially early morning. When you check the weather in Blue Mountains 10 days or a blue mountains weather forecast 14 days, expect cooler overnight lows and the possibility of afternoon storms in summer.
What should visitors know before heading up?
Layered clothing is the most practical advice. A day that starts at 12°C can warm to 24°C in summer, or stay below 10°C in winter. If you’re planning a walk like the Grand Canyon track, check the blue mountains weather hourly to avoid late-afternoon thunderstorms. The blue mountains weather 21 day forecast is useful for trip planning, but the local forecast three days out is more reliable. Road conditions can change quickly with fog or frost, so a blue mountains weather warning from the Bureau is worth noting.
Does it snow in the Blue Mountains?
Light snow falls a few times each winter, typically on the highest ridges like Blackheath and Oberon. It seldom settles for more than a day, but can create icy roads and beautiful frosty scenes.
How does the weather compare with Sydney?
The mountains are usually 5–8°C cooler than the city, and the humidity is lower. Rainfall can be heavier on the eastern escarpment, while the western valleys are markedly drier.
What is the best time of year to visit?
March to May and September to November offer mild temperatures and lower chance of fog. Summer is fine but can bring storms; winter appeals for clear, cold days and possible snow.
Sources
For broader Australian conditions, visit the Australia weather hub. If severe storms or bushfire weather is expected, check the severe weather warning page. For other mountain climates, see our inclement weather guide.