Sydney's Weather: Hot Summers, Mild Winters

Sydney enjoys a temperate climate with distinct seasons—reversed from the Northern Hemisphere.

Summer (Dec–Feb)

• Avg high: 25–27°C (77–81°F); peaks 35–40°C (95–104°F) during heatwaves.
• Avg low: 18–20°C (64–68°F).
• Humidity moderate; afternoon seabreezes (southerly buster) bring relief.
• Rain: Thunderstorms, occasional heavy downpours (Feb wettest).

Autumn (Mar–May)

• Pleasant: 20–24°C (68–75°F) days, 13–16°C (55–61°F) nights.
• Lower humidity, stable weather—best visiting time.

Winter (Jun–Aug)

• Avg high: 16–18°C (61–64°F); Avg low: 8–10°C (46–50°F).
• Rarely freezes in city; frost in western suburbs.
• Rain: Frontal systems, steady drizzle (Jun–Jul wettest).

Spring (Sep–Nov)

• Warming: 20–23°C (68–73°F); winds pick up (windiest season).
• Jacaranda bloom (Oct–Nov) — iconic purple canopy.

Microclimates

• Coast (Bondi, Manly): Milder, breezier.
• Western suburbs (Penrith, Blacktown): Hotter summers (45°C+), colder winters (0–2°C).
• Blue Mountains (1 hr west): Snow possible winter; 5–10°C cooler.

Climate Change Note

Heatwaves more frequent/intense; rainfall more variable; sea-level rise threatens coastal suburbs. 2019–20 "Black Summer" fires ringed the metro area.

Pack layers, sunscreen, and a light rain jacket—Sydney serves all four seasons in a week sometimes.