"With so much water around they're going to be loving life," said biosecurity collection curator at the Orange Agricultural Institute Peter Gillespie.

"That's exactly what mosquitoes love, and so they will be doing the dance of the mosquitoes, making more more mosquitoes and making everyone's life a little bit more unpleasant."

Cool and overcast conditions have been keeping a lid on numbers but that won't last.

"As soon as we get a few of those warmer days and you want to sit out on the deck I can guarantee you'll be doing a bit of the old slapping of these guys who want to feed on your blood," he said.

And while their bites and buzzing are annoying, mozzies also pose a more serious risk, carrying and transmitting disease like Ross River, Barmah Forest Virus, and Murray Valley Encephalitis, which can be fatal.

Western NSW LHD is already receiving reports of increased mosquito numbers and is urging people to take precautions.

"At this stage we haven't had an increase in human illness but we do know there's an increase in mosquito numbers so we do want people to be careful," Ms Stanley said.

She said Ross River virus was of particular concern.

"Most people have very mild illness (with Ross River virus), but there are some people that do get incredibly unwell and it can be a bit of a long term issue for them."

Health advice is to minimise your risk of being bitten by mosquitoes: if you can remove pooling water around your home you should do that, but for those in low-lying flooded areas it's a matter of protecting yourself.

"Don't go outside at dusk when the numbers are higher; wear long sleeves; and use mosquito repellent," Ms Stanley said.

With La Nina officially declared and wet weather predicted to continue into summer, Mr Gillespie says the mosquitoes could also be joined by some other creepy crawlies.

"Typically one of other things we get associated with rain and floods are spiders," he said.

"In the past we've had people wake up one day and find that there's swathes of spiderwebs covering the river foreshores, particularly when there's been high water."

Millipedes can also make their presence known.

"They tend to come out in big numbers particularly when the soil gets wet and heavy as it is at the moment, and they'll tend to start coming inside.

"So that's the other feature of wet weather your friend the millipede comes in and marches around the house."

Our journalists work hard to provide local, up-to-date news to the community. This is how you can continue to access our trusted content: