Yes, you will find spiders in Ireland. You are very likely to see them in homes, gardens, walls, and wet areas.
Most of the spiders in Ireland are native or long established. Most are harmless to people.
A few species can cause a painful bite, but the vast majority of Irish spiders are not a real threat.
You are most likely to notice house spiders, false widows, daddy long legs, and outdoor web builders near windows, fences, and grass. You will probably see more of them in late summer and autumn, when they become easier to spot indoors.
The Short Answer: Common, Native, And Usually Harmless
You will find a lot of spiders in Ireland, including many familiar Irish spiders that live near people. Most house spiders are shy, built to catch insects, and not interested in you.
How Many Spider Species Live In Ireland
Ireland has a large spider list, with hundreds of recorded species and more being noted over time. Many are tiny, hard to spot, or live outdoors in grass, hedges, walls, and wetlands.
Are Any Irish Species Dangerous To People
A few species can bite, especially false widow spiders, but serious harm is uncommon. The best-known concern is Steatoda nobilis, while harmless lookalikes like daddy long legs and Phalangium opilio are often mistaken for spiders even though they are harvestmen.
Why Spiders Become More Noticeable In Autumn
You usually see more spiders in late summer and fall because adults are more active and males wander in search of mates. Cooler weather also pushes some species indoors, so your windows, corners, and storage spaces may suddenly seem full of spiders.
The Spiders People Most Often Notice Indoors
You usually notice the spiders inside that make large webs, hide in corners, or roam at night. A few are common in houses and sheds, and several are often mixed up because they look similar.
Giant House Spider And Other Large House Visitors
The giant house spider is the one many people notice first because it is large and fast. You may also hear the names Eratigena atrica and Tegenaria parietina used for big house-dwelling spiders, along with the familiar daddy long legs spider.
Cellar And Corner-Dwelling Species
The long-legged Pholcus phalangioides often appears in ceilings, corners, and quiet rooms. You may also spot the European cave spider, plus web builders that stay hidden unless you look closely.
False Widows In Sheds, Walls, And Window Areas
Steatoda nobilis, the noble false widow, gets the most attention. Related species such as Steatoda grossa, the false black widow, and Steatoda bipunctata often turn up in sheds, wall gaps, window frames, and cluttered indoor spaces, and the cupboard spider name is also used for some of them.
Lace-Web And Ground-Hunting Species Around The Home
Around houses, you may also find the black lace weaver, Amaurobius ferox, Amaurobius fenestralis, and the lace web spider. Ground hunters like Scytodes thoracica, the spitting spider, Dysdera crocata, the woodlouse spider, Scotophaeus blackwalli, the mouse spider, and Harpactea hombergi may wander indoors from gardens or cracks in walls.
Garden, Wall, And Wetland Species You May See Outside
Outside, you are more likely to see spiders on fences, flowers, stonework, and low plants than on open ground. Many of them build orb webs, while others hunt without webs and move quickly over leaves and soil.
Orb-Weavers In Gardens, Fences, And Windows
Common outdoor web builders include Araneus diadematus, the cross spider or garden spider, and the pumpkin spider. You may also see Zygiella x-notata, the missing sector orb weaver, missing sector orb web spider, and silver-sided sector spider, plus Nuctenea umbratica, Larinioides cornutus, the furrow orb-weaver, Araniella cucurbitina, the cucumber green spider, the green spider, and Enoplognatha ovata.
Jumping And Crab Spiders On Sunny Surfaces And Flowers
Small active hunters are common on walls, leaves, and blossoms. You may notice Salticus scenicus, the zebra jumping spider or zebra spider, plus jumping spiders that turn quickly to face you, and crab spider species such as Misumena vatia and the goldenrod crab spider.
Nursery Web And Raft Spiders Near Grassland And Water
Near tall grass, ditches, and wetlands, you may see Pisaura mirabilis, the nursery web spider. Bigger wetland hunters include the raft spider, Dolomedes fimbriatus, the fen raft spider, and Dolomedes plantarius, which are more likely to stay close to water.
How To Identify, Avoid, And Safely Remove Them
Most spider ID starts with body shape, web style, and where you found it. A few simple clues can help you tell a common house visitor from a species that deserves extra caution.
Simple ID Clues For Shape, Web Type, And Behavior
Steatoda nobilis and other false widows in the Theridiidae family tend to make messy cobwebs and hide in dark corners. A giant house spider is fast, long-legged, and often runs across floors, while Pholcus phalangioides hangs in loose webs and vibrates when disturbed.
When A Bite Is Worth Medical Advice
A bite from a false widow spider can cause pain, swelling, or redness, so you should get medical advice if symptoms get worse or spread. Seek help right away if you have trouble breathing, feel faint, or the bite comes from a suspected European cave spider or Meta menardi and the reaction seems strong.
Humane Ways To Move Spiders Back Outside
Trap the spider using a glass and a piece of cardboard. Carry it outside and release it away from your door.
Seal gaps and tidy clutter to reduce indoor sightings. Check sheds and corners where spiders like to hide.
