Sydney

September–November (austral spring) and March–May (austral autumn) are the optimal windows — 18–25°C, low humidity, drier weather, and far smaller crowds than the December–February summer peak. December–February is the most popular and most expensive time (Sydney is hot, the beaches are full, the holiday energy is exceptional) but accommodation prices spike and Christmas/New Year's are particularly brutal — book 6+ months ahead for those weeks. June–August is the southern winter: 8–17°C, often grey but with very pleasant sunny weeks. The whale-watching season (May–November) is excellent off Sydney Heads.

Sydney's Opal card (or contactless bank card) covers the entire integrated transport network: trains, buses, light rail, and ferries — with capped daily and weekly maximums. The train network is excellent for distance (airport to CBD in 13 minutes), buses cover the eastern suburbs (Bondi, Bronte, Coogee), and ferries are the most scenic and underrated way to get around the harbour. Walking is genuinely viable across the CBD, Circular Quay, The Rocks, Darling Harbour, and Surry Hills. Uber and Lyft are widely available; black cabs are also fine but pricier.

Sydney's food story is built on excellent produce, the city's vast Asian-Pacific population, and a café culture that the rest of the world has largely copied. The breakfast and brunch scene is genuinely world-leading (Bills, Three Blue Ducks, Reuben Hills). The Vietnamese in Cabramatta and Marrickville is the best outside Vietnam. The fine-dining scene (Quay, Bennelong, Saint Peter) leans seafood-heavy with native Australian ingredients. For wine, the Hunter Valley (2 hours north) and the Sydney natural-wine bars (P&V, 10 William Street) are both excellent. Pubs (The Old Fitzroy, The Lord Dudley) are increasingly serving genuinely good food alongside the local craft beer scene.