Autumn in Sydney
Sydney Weather in May
On average, Sydney sees a top of 20°C and an overnight low of 12°C in May, with around 11 rain days and 105mm of total rainfall. UV is typically low-moderate, 3-4.
20°C
12°C
105mm
11
What May is like in Sydney
May brings a noticeable cooling as the subtropical ridge pushes north and cold fronts from the Southern Ocean begin affecting Sydney more regularly. Mornings can be crisp, particularly in western suburbs like Penrith and Blacktown where temperatures drop to single digits. Coastal suburbs remain milder thanks to the harbour's thermal mass. Rainfall decreases from the autumn peak, and dry, sunny days become more frequent. Ocean temperatures drop to around 19-20°C.
These figures are long-term averages, not a forecast — for today's actual conditions and the week ahead, check the live Sydney weather forecast. Averages are useful for planning travel, events or what to pack, but any single May can run warmer, cooler, wetter or drier than the long-term normal.