They may make our skins crawl, but instead of sweeping up spider webs we should be "embracing" them and leave the creatures alone, an environmental educator says.

Sydney is experiencing a booming spider season due to the warm, wet weather which is supporting insect survival.

Spiders you can leave alone Hunstman — "they can bite but it's rare," Mr Bock said.

Hunstman — "they can bite but it's rare," Mr Bock said. Black spiders — regularly seen leaving webs on window sills.

Black spiders — regularly seen leaving webs on window sills. Daddy-long-legs

Daddy-long-legs Orb-weaving spiders in the garden Spiders to get rid of (usually seen on ground) Sydney funnel web

Sydney funnel web Trapdoor spiders

Trapdoor spiders Mouse spider

"Insects breed up in such big numbers, so usually we have the Charlotte's Web story where your female spider will lay an egg sac with hundreds of eggs inside and babies all hatch out and only a few of them will make it to adulthood," David Bock from the Australian Museum said.

"But because there are loads of insects around at the moment, a lot more [spider] babies are going to eat and survive and so you're just going to get really big numbers of spiders around."

Garden orb-weaving spiders make suspended, sticky, wheel-shaped webs between trees and shrubs where insects are likely to fly. ( Supplied: Connie Jansen )

Mr Bock told 702 ABC Sydney that most people had an "unreasonable fear" of spiders and that we should "absolutely embrace them", particularly those that spin intricate webs in the garden.

"There's a lot of fear out of proportion with the spiders and so people just decide to destroy the spiders and then they decide to complain about the mosquitoes, the flies, the cockroaches," he said.

"If they left most of the spiders there, they'd have less problems."

That advice is well practiced by 702 ABC Sydney listener Brendan, who said he worked hard to protect the spiders that kept the pests out of his cotton plants.

"The harvest gets covered in spider webs but the staff are encouraged to ignore the spiders," he said.

"Only occasionally we do get redbacks in the crop and they're a bit nasty but everything else just crawls away.

"We help promote beneficial insects and only target the prey we're looking for which saves you on insecticides and helps us manage resistance."

Mr Bock said while most people wanted a "spick and span house", it was useful to leave some of the harmless eight-legged creatures around to capture other insects.