Melbourne serves up four proper seasons, and they genuinely change how a deck gets built — from footing pours to board gapping to the first oil. Here's the seasonal run-down, and how to time your build so you're on the new deck when the good weather arrives.
Spring (September–November): the golden window
Spring is the sweet spot. The ground is workable after winter, rain showers pass quickly, temperatures are kind to both trades and timber, and you finish just in time for summer. The practical catch: everyone else wants a spring build too, so spring slots book out 4–6 weeks ahead — often further. If you want a spring deck, lock it in during late winter.
Summer (December–February): fast, but watch the heat
Summer builds are absolutely fine — we build through it every year — but Melbourne's extreme days shape the details:
- Board gapping is calculated for timber movement, and boards laid on a 38°C day are at their most expanded. Experienced builders allow for that so your winter gaps stay correct.
- Oils and coatings cure poorly above the mid-30s, so the finishing coat gets scheduled around heatwaves.
- Site safety: extreme-heat days pause work for everyone's sake, which is worth knowing when you see the forecast.
Autumn (March–May): the underrated season
Autumn is Melbourne's most stable stretch — warm days, low wind, reliable working weeks. Footings cure properly, timber behaves, and you get the deck finished and oiled before the winter damp sets in. If you've missed spring, autumn is the best-kept secret, and builder availability is much better than people expect.
Winter (June–August): possible, with patience
Winter decks get built every year, but Melbourne's wet weeks stretch timelines. Footing pours need dry windows, timber takes up moisture, and freshly oiled boards need dry days to cure. The upside of building in winter: you're first in the queue, and you step onto the finished deck the first warm weekend of spring.
Whatever the season, the two things you shouldn't compress are footing cure time and the permit. Both can be done in parallel with ordering materials — which is exactly how a good builder sequences it.
How to actually time it
- 10–12 weeks out: get a free on-site measure and a fixed written quote.
- 8–10 weeks out: if a permit is needed, lodge it (see our permit rules guide).
- 6 weeks out: confirm materials — hardwood and composite lead times vary.
- Build week: most residential decks take 1–2 weeks on site.
Whether you're aiming for this spring or next, the cost side doesn't move much season to season — our 2026 cost guide has current rates. Book a free measure and we'll map the timeline to your backyard.