The honest answer first
Central Station has the only proper lockers in the network. They're also not the bargain option. Booking apps that reserve a slot at a partner shop nearby routinely undercut the station's own price, some by a wide margin. And if you're changing trains at Town Hall or Wynyard rather than Central, there's no locker at either station at all - the booking-app shopfronts are the only option, not a cheaper alternative to one.
Central Station's lockers
The self-service lockers sit on the Grand Concourse, run by Smarte Carte, in a few different sizes. Expect somewhere in the region of AUD 12 to AUD 20 a day depending on which size you need. Radical Storage's own assessment of these lockers, published on its Central Station page, is that they can be costly and often less spacious than the partner-shop alternative it lists nearby - which is a reasonable steer if your bag is on the larger side. There's a separate, cheaper facility at Central reportedly charging around $4.40 per item, but it's restricted to passengers travelling on regional or intercity trains ahead of their own departure - not a general-public option. An older account suggests some regional-passenger luggage handling was once offered without an extra per-item fee, which conflicts with that $4.40 figure, so treat the current regional-counter price with some caution rather than as settled. Central Station's lost property office, reportedly at Shop 9 on Eddy Avenue and open weekdays 8am-4pm, is a distinct service again - it holds items left behind, not luggage dropped off deliberately.
No lockers at Town Hall or Wynyard
Neither station has an official storage facility of its own, despite both being major interchanges. If you're told at either station that there's nowhere to leave a bag, that's accurate - not a case of asking the wrong staff member. The workaround is the same booking-app shopfront model used elsewhere in the CBD, or a walk to Central Station if you'd rather use a fixed locker.
How the booking apps actually work
Stasher, Bounce, Radical Storage, Nannybag, Qeepl and Vertoe aren't storage shops in their own right - they're booking layers that reserve you a slot at a partner convenience store, hotel or self-storage locker, and generally require booking online in advance rather than turning up and asking. Pricing varies more than the marketing suggests: Stasher lists Sydney storage from around A$2.99 a day and backs it with a stated A$19,000 loss/damage guarantee; Bounce lists from about A$3.25 a day with a A$10,000 guarantee and 24/7 support. Nannybag reportedly charges around A$7.50 a day near Central Station, and Qeepl from about A$8.99 with A$1,500 of per-item insurance included - both single-sourced figures worth treating as indicative rather than fixed. Vertoe reportedly quotes around A$7.95 a day for its train-station-area points. Radical Storage advertises a headline rate well below any of those - but its own individual city, Town Hall and Wynyard listing pages quote a standard rate considerably higher than that headline number, so the site-wide 'from' price shown on its homepage isn't a reliable guide to what a specific address will actually charge. Check the exact listing before paying, not the marketing page above it. Worth noting too: identical customer-review wording turns up across several different Radical Storage Sydney suburb pages, which suggests some of what's shown per-location is a recycled template rather than feedback specific to that address - reason enough not to lean too hard on the star rating alone.
Which shopfronts stand out
Bounce's Town Hall point, branded 'Victoria Tower Sydney', has a genuinely large review base - over 200, averaging 4.8 stars - with recurring praise for a fast drop-off and pickup process, and it connects underground to the Queen Victoria Building, so there's no need to surface to the street between drop-off and collection. Its Wynyard-area point, described as 'Near Cliveden', is reportedly open 24/7 and had logged over 1,400 bags stored by the time it was last reviewed. A Stasher partner near Central - an Ezymart convenience store barely a minute's walk from the Grand Concourse - is singled out in reviews for being easy to find, with a helpful shop owner.
Self-storage away from the stations
If you need somewhere for longer than a day, or somewhere with round-the-clock access rather than a shop's opening hours, CBD Storage Sydney runs a 24-hour locker bank on Level P6 of the World Square Shopping Centre, at George and Pitt Streets, priced from about $24 a day or $77 a month for registered customers. An older account also mentions the Sydney Visitor Centre at The Rocks once storing bags for $12-$20 by size - but that same account reported the service had already stopped as of 2015, so it shouldn't be assumed to still exist without checking on the day.
Circular Quay and The Rocks
The waterfront itself has no public lockers or storage counter. Anything available there reportedly runs through nearby partner shops rather than a facility at the quay, so if your day starts or ends at the harbour, it's more reliable to book a CBD point in advance and walk the short distance down than to look for something at the water's edge.
Arriving by air
Sydney Airport's Terminal 1 international arrivals area has a Smarte Carte-branded storage counter, open daily 7am-7pm. It also runs a paid transfer service that moves bags between the airport counter and storage points in the CBD, which is worth knowing about if you land with time to kill before a hotel check-in but want your bag to end up in town rather than at the terminal.
Booking ahead and peak times
Because most of these networks work by reservation rather than walk-up, book before you arrive - it's what secures the insurance cover most of them advertise, and it avoids finding a partner shop's allocation full when the Grand Concourse is busiest around weekday commuter peaks. Locker sizes vary: Central's Smarte Carte units come in different sizes for a reason, so check that an oversized case will actually fit before you queue for one.
