Sydney

Sydney pairs a compact, walkable harbour centre with genuine family basics: free harbourside parks, calm patrolled swimming spots, and a ferry network kids treat as an attraction in itself. It is a long-haul trip for most visitors — budget a full recovery day either side of the flight — but the payoff is a city where beaches, zoos and museums sit within a short ferry or train ride of each other. Expect premium prices: Sydney is one of the more expensive family destinations on this list.

The harbour does a lot of the entertaining for free: the Manly and Taronga Zoo ferries are a highlight for most children before they even reach the destination, and North Bondi’s sheltered ocean pool lets younger kids swim without fighting surf. Public transport (Opal card) covers trains, buses and ferries with one tap, which matters with a stroller in tow. Spring (Sep–Nov) and autumn (Mar–May) bring the most comfortable weather for walking and outdoor time; December–February is peak season — hot, humid and priced accordingly, though it’s also when beach culture is in full swing. Winter (Jun–Aug) is mild by European standards but too cool for most families to swim.