Sydney

Summer (Dec–Feb): hot, humid and beachy (roughly 20–30°C). Peak season—prices and crowds rise for New Year’s Eve fireworks, Sydney Festival and Mardi Gras (Feb–Mar). Autumn (Mar–May): warm, dry and pleasant (15–25°C). Shoulder season with fewer tourists, good weather for harbour walks and outdoor dining; late‑May sees Vivid Sydney kicking off. Winter (Jun–Aug): cool and crisp (8–17°C). Off‑peak—cheaper flights and hotels, smaller crowds and excellent whale‑watching (Jun–Nov); Vivid often runs into June. Spring (Sep–Nov): mild and blossoming (12–22°C). Another strong shoulder season—jacarandas and gardens in bloom, comfortable sightseeing and fewer crowds than summer. Overall: visit in spring or autumn for best weather and value; pick summer for festivals and beach life, winter for bargains and whale migration.