Perth sits on a river wide enough to need ferries, and those ferries are ordinary public transport, priced and ticketed like a bus. Get that one fact straight and a family week here stops being a driving problem: the zoo, the stadium playgrounds, the island jetty and most of the beaches hang off water and rail. Below is the order I would put them in, with the closing days, age limits and last-entry times that wreck otherwise sensible plans.
The river does the work a hire car would
Start at Elizabeth Quay (city centre, on the CBD's river edge). It is free, unticketed and open at all hours, it sits directly above Elizabeth Quay station, and the ferry jetty is on the same paved apron. The water-jet playground is the reason to bring swimmers on a day you had not planned to swim. Small children will stay in it for an hour, which is the break you want between two ticketed stops. There is no group limit and nothing to book, so it also works when a plan collapses and you need somewhere to put four kids at short notice.
From that same jetty, the ferry crosses to Mends Street Jetty in about ten minutes and lands you 500 metres from the gate of Perth Zoo (South Perth). Adult entry is around A$33 with reduced child pricing, and group and school rates are available. The crossing is half the entertainment for anyone under six, so you arrive at the zoo without having already spent the morning's patience. Prams and wheelchairs get through the whole site. Two to three hours is honest for primary-age children; longer and you are dragging.
The other river stop is Chevron Parkland at Optus Stadium (Burswood, east bank). It is free open parkland with six playgrounds graded by age, which solves a five-year-old and a ten-year-old travelling together: they do not have to want the same equipment. Arrive by train or ferry, then walk back into the city over Matagarup Bridge. The bridge is the part the kids remember. Avoid it on event days, when the precinct fills and the trains run at capacity.
An afternoon in Kings Park that costs nothing
Kings Park and Botanic Garden (West Perth, on the escarpment above the river) is free, unticketed and has no group limits, and it is the easiest half-day in the city to reach without driving. The Federation Walkway, the glass-and-steel span through the treetops, is open 9am to 5pm daily. Guided walks and school programs can be booked if you want structure, but you do not need them.
The part worth planning around is Rio Tinto Naturescape, inside the park. It is a free nature-play area where children dam a real creek barefoot, catch things in nets and get properly muddy, and it holds attention far longer than any playground. It also closes every Monday, closes for the whole of February, and shuts on very-high fire-danger days. Families arrive to a locked gate over this more often than any other mistake in this article. Check before you commit the afternoon, and pack a towel and a change of clothes when it is open.
Where to go when the forecast says thirty-eight degrees
Perth's heat reshapes family itineraries, and the indoor options here are good enough to hold in reserve deliberately rather than fall back on.
WA Museum Boola Bardip (Perth Cultural Centre, Northbridge) is A$15 for adults, A$10 concession and free for anyone 15 and under, which makes it the cheapest full morning in the city for a family of four. It is fully accessible with lifts and wheelchairs, runs autism-friendly quiet hours, and holds Curious Kids sensory sessions daily for under-fives, so the toddler in the group has somewhere to be rather than being wheeled around behind an older sibling's museum. Group and education bookings go through 1300 134 081.
Scitech (West Perth, a short walk or free CAT bus from the centre) costs roughly A$20 to A$25 a head and buys about two hours of genuine engagement from primary-age children. The detail that matters for mixed-age families is the planetarium show pitched at under-fours, so the youngest is not parked outside while everyone else goes in. Pre-booked groups, school programs and birthday parties are catered for.
The Perth Mint (East Perth, a fifteen-minute walk from the centre) is around A$25 for adults with family passes available, and it takes exactly one hour of the day. The live gold pour is a real set-piece rather than a display case: molten metal, heat you can feel from the seats. It is the rare heritage attraction that holds a seven-year-old. Tours run to a timetable and sell out, so book the slot online, and know that the 9:30am tour goes first.
Fremantle on a thirty-minute train
The Fremantle line runs from the city centre to the port in about half an hour, and it is the single most useful non-driving day here. Two things anchor it.
WA Maritime Museum (Victoria Quay, Fremantle) is a five-minute walk from Fremantle station, A$15 for adults and free for 15 and under. The submarine tour is ticketed separately and is the obvious hook, but be honest with yourself about it before you buy. There is no lift and no toilets inside the submarine, and the ladders and hatches are unforgiving. It suits older children and teenagers; with a toddler or a pram, do the main museum and skip the boat. Group bookings go through 1300 134 081, and two wheelchairs are available on site.
Fremantle Prison (Fremantle, ten minutes uphill from the station) is a UNESCO World Heritage site, and the standard Convict Prison Tour at around A$25 for adults is one of the few heritage tours the whole family can genuinely do together, daily, 10am to 5pm. The Tunnels Tour is a different proposition: A$68 adult, A$47 child, A$207 family, two and a half hours underground, and 12 and over only. Check ages before anyone gets attached to the idea, because splitting the group at the door with a disappointed nine-year-old is a bad start to an afternoon. Schools and groups have their own dedicated programmes with different tour options.
Give Rottnest Island a full day, not half
Rottnest Island (25 to 30 minutes by ferry from Fremantle) is the single best answer to "we don't want to drive," because there are no cars on it at all. Return ferries start from about A$49 including island admission, bike hire runs around A$30 a day, and hop-on hop-off island buses cover the loop for anyone not cycling. Rottnest Express, SeaLink and Rottnest Fast Ferries all run it and all take school, charter and family-sized bookings, with bulk bike hire available for groups.
Do not try to fold it into a half-day. The island fills a full one easily, between the beaches, the bus loop and the quokkas that will walk up to a picnic uninvited, and rushing the last ferry with tired children is the version of this day people complain about afterwards. Book ferries well ahead in school holidays; they sell out, and the family that turns up at the terminal hoping for seats does not get them. If you have cyclists in the group, bikes beat the bus. If you have a five-year-old and a pram, take the bus and pick two beaches.
Two coast days, one easy and one less so
Scarborough Beach foreshore (Scarborough, on the northern coast) is reached by bus rather than train, which is the only friction. The foreshore itself is the most family-legible beach precinct in the metro area. The A$100m redevelopment put the playground, the skate bowl and the sand within sight of a single bench, so you supervise instead of chasing. Entry is free. Scarborough Beach Pool costs around A$8 for adults and takes lane and group bookings; its beach-entry leisure pool is meaningfully safer than the surf for small swimmers, and on a day with a swell that is where you should be.
AQWA — The Aquarium of Western Australia (Hillarys Boat Harbour, further north) is about A$35 for adults with reduced child entry, open seven days from 9am and closed only on Christmas Day. It has Australia's longest single aquarium tunnel, and it sits inside a marina with a sheltered swimming beach and a playground immediately outside, so the visit does not end when the fish do. Group and school rates are available. Reaching it car-free means the train north and then a bus, and it is the longest public-transport leg in this article. It is perfectly doable, but budget the better part of an hour each way and go early.
The two days that genuinely need a car
I would rather say this plainly than pretend the whole state is reachable by rail. Two outings are worth hiring a car for a single day, and neither justifies keeping one all week.
Caversham Wildlife Park (Whiteman Park, in the Swan Valley) is around A$40 for adults with reduced child entry, and it is the most reliable place near the city to actually touch a koala and hand-feed kangaroos with no extra charge. The interactions are included, not upsold. Parking is free and so is entry to the surrounding Whiteman Park. It opens 9am to 4.30pm daily, but last entry is 3.30pm and you genuinely want to be through the gate by 2pm to get the animal sessions. There is a dedicated tour-group section, and group bookings go through +61 8 9248 1984.
Yanchep National Park (about 45 minutes north by road) puts koalas, wild kangaroos and a limestone cave on one site, with large picnic and BBQ areas. There is a small per-vehicle park entry, and Crystal Cave is A$16 for adults, A$8 for children and free for under-fives. The cave tour runs 45 minutes on a daily timetable, which is short enough to hold a young attention span. Longer cave tours are where small children start asking to leave. Guided tours take groups.
Whether the south-west fits your week at all
Two of the region's best family attractions sit roughly three hours south by road, and the honest answer for most first-time families is that they do not belong in a car-free Perth week. Driving down and back in a day burns six hours of car time to see two things, which is precisely the trip you were trying not to have. Do them properly on a separate two- or three-night leg, or leave them out.
If you do commit, Busselton Jetty (on the south-west coast) is the anchor. The jetty train saves 1.8km of walking each way, the difference between a pleasant outing and carrying a child back along an exposed timber deck, and the Underwater Observatory descends 8 metres to a real reef without anyone getting wet. Jetty entry is a few dollars; train plus observatory is around A$45 for adults with reduced child pricing. A new lift makes the observatory accessible, and both the train and the observatory take timed group bookings through the jetty's own system.
Ngilgi Cave (south-west, inland from the coast) is the other one worth the distance, and it is built for children rather than for parents. Semi-guided tours leave every half hour from 9:30am to 4pm daily, and "semi-guided" is the point: you move at your own pace through the cave, so nobody is trapped in a tour group with a bored four-year-old. It is about A$22.50 for adults and A$12.50 for children aged 4 to 16, with the Ancient Lands Experience from around A$34. There is a playground, a cafe and BBQs above ground, which buys you twenty minutes of coffee.
Booking, timing and what it costs
Transport. Get a SmartRider card on arrival and use it for trains, buses and the river ferries. The ferry to South Perth is part of the same network, not a tourist cruise. Free CAT buses loop the central area, which covers the museum, Scitech and the Mint on foot-and-bus alone. Check last services before evening plans, particularly out at the stadium on event nights.
Cash. You will not need it. Cards work everywhere from ferry jetties to cave tickets. Keep a small amount for a beach kiosk and stop worrying about it.
Booking ahead. Three things sell out and will not fit you in on the day: Rottnest ferries in school holidays, the Perth Mint gold-pour slots (the 9:30am first), and Fremantle Prison's Tunnels Tour. Everything else here can be decided at breakfast.
Timing. February is the month to plan defensively: Naturescape closes for all of it, and the heat pushes you indoors by midday. In any month, run outdoor mornings and indoor afternoons, not the reverse. Mondays cost you Naturescape.
Budget. A family of four doing one ticketed attraction a day sits at roughly A$70 to A$120 depending which one, with the museum and the maritime museum near the bottom (children free) and the aquarium and wildlife park near the top. Alternate a paid day with a free one (Kings Park, Elizabeth Quay, the stadium parkland, the Scarborough foreshore) and the week costs less than most people budget for it.
Where to stay. Base yourself once, not twice. Anywhere within walking distance of Elizabeth Quay puts the ferries, the trains and the free bus loop at the door; Fremantle is the alternative if you want the Rottnest ferry and the prison on your doorstep instead. Compare rates across both in the Perth hotel search, and use the Perth guide for the rest of the city beyond this family route.
