The non-negotiables, any season
- Sunscreen (broad-spectrum, high SPF) — genuinely more important here than most visitors expect; see our safety guide for why. Buying it locally works fine too, but pack some for day one.
- A reusable water bottle — Sydney tap water is safe to drink, and free water fountains (including bottle refill stations) are common in parks and along the coastal walks.
- Comfortable walking shoes — this is a walking city, from coastal paths to the CBD's hills, and the wrong shoes will cost you more of your trip than any single packing mistake.
- A light rain jacket or umbrella, even in the drier months — Sydney's weather can turn briefly wet with little warning, any time of year.
Season-specific additions
Summer (Dec–Feb): Swimwear, a proper sun hat, and light, breathable clothing — humidity is real, and layers matter less than breathability. A small portable fan or cooling towel isn't a bad shout during a genuine heatwave.
Winter (Jun–Aug): A warm layer for evenings, which can get genuinely cool — but nothing like a Northern Hemisphere winter. A mid-weight jacket covers most winter days; heavy winter coats are overkill.
Autumn/Spring (Mar–May, Sep–Nov): Layers are your friend — mornings and evenings can be noticeably cooler than the middle of the day.
🎒 What visitors consistently forget
A portable phone charger for long days out, a swimsuit even on a "city" trip (an unplanned harbour swim is more likely than you'd think), and a card with no foreign transaction fees (see our money guide) — all small things that repeatedly come up in traveller regrets.
What you genuinely don't need
Heavy hiking boots (unless you're specifically doing a serious multi-day bushwalk), a full formal wardrobe (Sydney dress codes lean casual even at nicer restaurants), or a universal power adapter bought at inflated airport prices — Australia uses its own distinct plug type (Type I), so buy an adapter before you fly if you don't already have one, ideally somewhere cheaper than the airport.
Electrical notes
Australia runs on 230V, and the plug shape (two flat pins in a V-shape, sometimes a third vertical pin) differs from both the US and UK/EU standards — a universal adapter covering "Australia/Type I" specifically is what you're after, not a generic one that may not include it.
