Australian Climate Zones — All 8 NCC & NatHERS Zones Explained
Australia is split into 8 National Construction Code (NCC) climate zones and 69 NatHERS sub-zones. Your zone determines the insulation, glazing and design strategies needed to reach a 7-star NatHERS rating under NCC 2022. Find yours below.
Quick lookup: major cities
| City | NCC Zone | Climate | Dominant load |
|---|---|---|---|
| Darwin | Zone 1 | Hot humid tropical | Cooling + dehumidification |
| Cairns / Townsville | Zone 1 | Hot humid tropical | Cooling |
| Brisbane / Gold Coast | Zone 2 | Warm humid sub-tropical | Cooling (mild winter) |
| Alice Springs | Zone 3 | Hot arid | Cooling + winter heating |
| Perth / Adelaide | Zone 5 | Warm temperate | Balanced |
| Sydney | Zone 5/6 | Warm to mild temperate | Balanced |
| Melbourne / Geelong | Zone 6 | Mild temperate | Heating |
| Canberra | Zone 7 | Cool temperate | Heating-dominant |
| Hobart | Zone 7 | Cool temperate | Heating-dominant |
| Thredbo / Mt Buller | Zone 8 | Alpine | Heavy heating |
Need the exact zone for your postcode? Use the free NatHERS Climate Zone Calculator.
All 8 NCC climate zones
Examples: Darwin, Cairns, Broome
Cross-ventilation, deep eaves, light-coloured roofs, ceiling fans, reflective insulation. Heating loads near zero; cooling and humidity control dominate.
Examples: Brisbane, Gold Coast, Townsville
Shading + ventilation focus, moderate insulation, reflective sarking. Some winter heating in cooler nights.
Examples: Alice Springs, Port Hedland
High thermal mass, small west windows, evaporative cooling viable. Big day-night temperature swings.
Examples: Mildura, Dubbo, Kalgoorlie
Balanced heating + cooling. Insulation R4+ ceilings, double glazing on west, shading critical.
Examples: Sydney, Perth, Adelaide (coastal)
Both heating and cooling matter. Passive solar design, R5 ceilings, low-E glazing on west and north.
Examples: Melbourne, Geelong, Wollongong
Winter heating dominates. Heavy insulation (R6 ceilings, R2.5 walls), double glazing, draught sealing essential.
Examples: Canberra, Hobart, Ballarat, Orange
Heating-dominated. R6+ ceilings, R2.8 walls, double or triple glazing, thermal mass on north-facing slabs, full draught proofing.
Examples: Thredbo, Mt Buller, Cooma
Extreme cold. R7+ ceilings, R3+ walls, triple glazing, full envelope sealing, mechanical ventilation with heat recovery (HRV).
NCC zones vs NatHERS sub-zones
The NCC's 8 zones drive prescriptive minimums — what R-value insulation, what glazing performance, what shading. The NatHERS 69 sub-zones are far more granular: each has an hourly weather file (BOM TMY data) that AccuRate, FirstRate5 and BERS Pro use to simulate exactly how your home will perform across an entire year.
Two homes in NCC Zone 6 (say, Melbourne CBD and Ballarat) can fall into very different NatHERS sub-zones with materially different heating loads — which is why postcode-level modelling matters.
Get a NatHERS rating for your climate zone
Designing or renovating? An accredited assessor will model your home in the correct NatHERS sub-zone and tell you exactly what insulation and glazing you need to hit 7 stars.