The Blue Mountains are a year-round destination, and each season has its own character.
Autumn (March–May) is arguably the best time. The deciduous trees in Leura and the gardens of the mountains turn gold and red, temperatures are mild and the bushwalking conditions are ideal. The Leura Gardens Festival in autumn draws visitors specifically for the foliage.
Winter (June–August) brings cold nights, occasional frost, and clear days with excellent visibility across the valley. Waterfalls are at their fullest after winter rain. The Blue Mountains winters are genuinely cold compared to coastal New South Wales — bring warm layers. The Yulefest tradition (hotels and restaurants putting on mid-winter Christmas dinners) has become an institution.
Spring (September–November) sees wildflowers in the heathlands above the escarpment and increasing temperatures. Weather is variable but the days lengthen quickly.
Summer (December–February) is warm to hot, with highs around 25–28°C in Katoomba, considerably cooler than Sydney. It is the busiest season, with school holidays and Christmas bringing large crowds to Echo Point and Scenic World. Book accommodation well in advance. Fire restrictions may be in place during hot, dry periods, limiting some bushwalking.
The major annual events include the Blue Mountains Music Festival (March, folk and roots music) and the Blue Mountains Writers' Festival (October). The Leura Village Fair (October) draws crowds to the neighbouring village.