Double Bay weather

Double Bay weather and local climate guide

Double Bay's harbour microclimate

Double Bay sits in a gentle valley opening onto Sydney Harbour, creating one of the most sheltered and mild microclimates in the eastern suburbs. The bay faces northwest, receiving afternoon sun while being protected from the dominant northeast sea breeze by the Point Piper ridge and Rose Bay headlands. Summer maximums average 26-27 degrees but feel warmer than the open coast due to reduced wind. The harbour water at Double Bay's foreshore moderates overnight temperatures, keeping winter minimums around 10-11 degrees — warmer than suburbs away from the water.

Sheltered conditions and harbour warmth

Double Bay is arguably Sydney's most wind-protected affluent harbour suburb. The surrounding ridgelines deflect both northeast sea breezes and southerly changes, creating a pocket of calm that makes outdoor dining possible even when coastal suburbs are battered by wind. This shelter comes at a cost on extreme heat days: without the sea breeze's cooling effect, Double Bay can reach temperatures 3-4 degrees above nearby Bondi. The harbour foreshore at Redleaf Pool provides reliable swimming in calm, warm conditions year-round, with water temperatures similar to ocean beaches but without the wave action.

Rainfall characteristics

Double Bay receives approximately 1,200 millimetres of rain annually, slightly above the eastern suburbs average due to orographic enhancement as moist air lifts over the surrounding ridges. The valley shape can concentrate runoff during intense rainfall, with the stormwater system along Bay Street occasionally overwhelmed. The Steyne Park area at the harbour foreshore is susceptible to minor inundation during combined heavy rainfall and high tide events. Fog is rare but can drift into the bay on calm autumn mornings when the harbour surface is warmer than the overlying air.

Seasonal luxury

Double Bay's protected position makes it a comfortable outdoor environment in every season. Summer evenings on the harbour foreshore are warm and calm, with ambient light reflecting off the water until well after sunset. Autumn is particularly pleasant, with mild temperatures, clear skies, and the changing colours of plane trees along the commercial streets. Winter days are frequently sunny and mild (16-18 degrees) with virtually no wind, ideal for the café culture that defines the suburb. Spring brings early warmth to the north-facing slopes above the bay.

Temperature extremes and records

Double Bay rarely experiences weather extremes. It is one of the few Sydney suburbs where temperatures almost never exceed 38 degrees, thanks to its maritime setting and typical afternoon sea breeze arrival even on hot days. Conversely, frost is unknown in the suburb, with the coldest mornings recording around 5-6 degrees on the harbour foreshore. The most extreme weather events affecting Double Bay are east coast lows that drive harbour surge above normal levels, potentially reaching the esplanade and lower sections of the commercial precinct during very high tides combined with persistent onshore winds.

Double Bay compared to nearby suburbs

Compared to Rose Bay (1 kilometre east), Double Bay is typically 1-2 degrees warmer on summer afternoons due to superior wind shelter but experiences identical overnight minimums. Compared to Paddington (1 kilometre south, on the ridge), Double Bay has warmer nights, less wind, and slightly higher humidity due to harbour proximity. Compared to the CBD (2 kilometres west, across the harbour), Double Bay is slightly cooler in summer but slightly warmer in winter — the inverse of what many expect. The key differentiator for Double Bay's weather experience is consistently low wind speed, which makes the measured temperature feel closer to the actual temperature more often than in exposed locations.

Explore nearby suburb forecasts

See how Double Bay's weather compares to its neighbours: Rose Bay weather, Paddington weather and Bondi weather. Or browse all Sydney suburb forecasts.