Pests in New South Wales
New South Wales spans subtropical north-coast conditions, temperate Sydney and cooler inland and alpine areas, so pest pressure varies considerably across the state.
Updated 20 September 2026 · General information about local pest conditions.
New South Wales climate and pest activity
- The north coast is warm and humid, with pest activity similar to South East Queensland.
- Sydney has warm summers and mild winters, with rainfall spread through the year.
- Inland and tableland areas have hotter summers and colder winters, making pests more strongly seasonal.
Housing and local environment
- Terraces and older brick homes in inner Sydney.
- Large apartment stock in Sydney.
- Detached homes and rural properties across regional NSW.
Common pests in New South Wales
Cockroaches
German cockroaches in apartments; American and smokybrown cockroaches in older buildings and drains.
Spiders
Funnel-web spiders in the Sydney region and parts of the coast; redbacks statewide.
Rats
Roof and Norway rats in older urban areas.
Mice
House mice, with plague events in grain-growing regions.
Mosquitoes
Coastal wetlands and inland floodplains after rain.
Cities in New South Wales
Pest questions New South Wales residents commonly ask
New South Wales pest guides
Pests in Apartment Buildings
Why pests move between units, who is usually responsible for what, and how residents, owners and strata managers can work together to solve pest problems for good.
GuideRodent-Proofing Your Home
How rats and mice get in, which materials actually keep them out, and how to combine exclusion with sanitation and trapping for lasting results.
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Sources & further reading
- Climate statistics for Australian locations — Bureau of Meteorology
- NSW Health — environmental health and pest-borne disease — NSW Health
- Australian Museum — insects and spiders — Australian Museum
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