Why pests are so bad in Sydney right now

Guide · Updated 29 October 2026 · by the Pest Control in Sydney team

If it feels like there are more cockroaches on the back step, more ant trails across the bench and more webs on the eaves lately, you're not imagining it. Every year, Sydney's pests ramp up from spring into summer. And this year the weather outlook gives them a head start.

Here's a plain-English look at what drives the surge, why it's worth getting on top of pests early instead of waiting, and how to get a local expert out without ringing around.

Sydney pests follow the weather

Most household pests are cold-blooded. Their breeding, feeding and movement speed up as temperatures rise, and many of them also need moisture. That's why Sydney's warm, often humid spring and summer, with storms rolling through after hot days, is peak season for almost everything that bugs us.

• Termites send out winged "alates" to start new colonies. CSIRO describes these flights happening on warm, humid nights, during humid periods in the warmer months and often at dusk. (More on termites)
• Cockroaches breed faster in the heat and wander more on warm nights, especially the big ones that live in drains and gardens. (Cockroach control)
• Ants get busy as the weather warms up and often march inside before and after rain. (Ant control)
• Funnel-web spiders: the Australian Museum says males leave their burrows to look for females mostly in summer and autumn, roughly November to April, and are often encountered after wet weather. (Spider control)
• Wasps and bees: bee swarms are a spring thing, and wasp nests that start small in spring can be big by late summer. (Wasp & bee removal)

Why this season could be a big one

The Bureau of Meteorology's long-range outlook for November 2026 to January 2027, issued on 22 October, says daytime and overnight temperatures are very likely to be above average across most of Australia. It also says there's an increased chance of unusually high daytime temperatures, with the highest chances (over 70%) including eastern parts of New South Wales, and that the chance of unusually warm nights is very high across much of the country.

The Bureau also reports that a strong El Niño is underway and that sea surface temperatures around much of Australia's south-east have been warmer than average. Back in August, it noted waters were especially warm along the NSW coast. The Bureau is careful to say El Niño is only one of several things that drive our weather, and its rainfall outlook for the east is mixed between models. But for pests, warm days and especially warm nights are the key ingredient, and that part of the outlook is clear.

In plain terms: a warmer-than-usual late spring and summer generally means pests breed faster and are active for longer, so problems that start small can grow quickly.

One more thing to know about this spring: fire ants

NSW DPI has reported red imported fire ants at Enfield in Sydney, first found in September 2026, and is running a response there. Fire ants are a biosecurity pest, not a normal pest control job. If you see small coppery-brown ants and dome-shaped mounds of loose soil with no obvious entry hole, don't disturb or treat them yourself. NSW DPI asks you to take a photo if it's safe and report it on 1800 680 244.

Why it's smarter to act early

1. Smaller problem, smaller job

Pests compound. A few German cockroaches can become an infestation within weeks in warm weather, a young wasp nest is far easier to deal with than a mature one, and a small termite incursion found at an inspection is a very different job from structural damage found during a renovation. Catching things early usually means a simpler treatment and less disruption.

2. Less damage to your home

Termites work out of sight, and many home insurance policies don't cover termite damage, so an annual inspection is your best early warning. Rats and mice chew wiring, insulation and pipes. The longer they stay, the more there is to fix.

3. Better for your family's health

Asthma Australia lists pests such as cockroaches, mice, ants and spiders as possible allergy and asthma triggers, through proteins in their droppings, saliva, urine and shed skin. NSW Health notes that rats and mice can carry leptospirosis, spread through contact with their urine. And funnel-webs and redbacks are best kept away from where kids play. Dealing with pests before they build up means less exposure.

4. Better timing

Booking in spring, before the summer rush, usually makes it easier to get a time that suits you, and gives treatments a chance to work before the peak.

What you can do this weekend

• Fix leaking taps, hot water overflows and air-con drains near the house. Moisture attracts termites, cockroaches and ants.
• Pull mulch, soil and garden beds back from weep holes and the slab edge, and move timber and firewood away from walls.
• Store food, pet food and bird seed in sealed containers, and don't leave dishes out overnight.
• Trim branches and vines touching the roof to cut off rat and possum highways.
• Fit door seals, especially on slab homes near bushland, to help keep funnel-webs out.
• Shake out shoes and gloves left outside, and wear gloves when gardening.

Hearing thumping in the roof? Check whether it's rats or a possum first. Possums are protected in NSW and need humane, licensed removal. (Possum removal)

How we make it easy

We're not a pest control company. We're a free quote-matching service. You answer three quick questions at the top of this page: what's bugging you, your suburb, and who to call. We pass your request to one vetted local pest expert who services your area. We look for businesses with strong reviews and a reputation for good work. They call you, work out a quote that suits your job, and you decide whether to go ahead, with no obligation and no ring-around.

We cover all of Greater Sydney, with a focus on South West Sydney, including Campbelltown, Liverpool, Camden, Narellan, Oran Park, Ingleburn and many more suburbs.

Sources

1. Bureau of Meteorology, Climate outlook for November to February (issued 22 October 2026)
2. Bureau of Meteorology, Climate outlook issued 27 August 2026 (archive)
3. CSIRO Australian National Insect Collection, Isoptera (termites)
4. CSIRO, Managing termites (PDF)
5. Australian Museum, Australian funnel-web spiders
6. Asthma Australia, Pests as asthma triggers
7. NSW Health, Leptospirosis fact sheet
8. NSW DPI, Red imported fire ants
9. NSW Government (Environment and Heritage), How to remove a possum from your roof

Frequently asked questions