Western Washington’s damp forests, gardens, shorelines, and homes are habitat for several noticeably large spiders. This guide covers 10 spiders and spider groups you may encounter, what helps distinguish them, where they tend to turn up, and which ones deserve extra caution—useful context for curious residents, hikers, and anyone who has just found a spider indoors.
1. Giant House Spider
The giant house spider, Eratigena duellica, is one of the largest spiders people commonly notice inside Western Washington homes. Its brown body is relatively modest compared with its long, hairy legs, and an adult’s leg span can reach several inches; males often wander in search of females, especially in late summer and fall. Look for a funnel-shaped web tucked into a garage corner, basement, shed, or other quiet spot, rather than a web stretched across open space. These spiders are not aggressive, and their dramatic size is more alarming than medically important: give one room to move, or guide it into a container instead of grabbing it.
2. Hobo Spider
The hobo spider, Eratigena agrestis, is an introduced funnel-weaver found in the Pacific Northwest and often confused with the giant house spider. It builds a sheet-and-funnel web in protected places such as foundation gaps, woodpiles, and ground-level clutter, and its brown coloring and long legs can make a quick identification unreliable. The old claim that hobo spiders routinely cause severe, tissue-damaging bites is not supported by good evidence; a bite should not be assumed to be dangerous simply because someone calls a spider a hobo spider. Because several local funnel-weavers look alike, use habitat and web shape as clues, not as proof, and avoid handling any unidentified spider.
3. Cross Orbweaver
The cross orbweaver, Araneus diadematus, is a familiar European species established in the region, especially around gardens and buildings. Many have a pale cross-shaped pattern of spots on the rounded abdomen, though the color and clarity of the marking vary; mature females are noticeably bulkier than the males. They build large, circular webs among shrubs, fences, porch railings, and other places where flying insects pass, often rebuilding or repairing them as needed. A cross orbweaver is worth watching rather than removing: its web offers an easy chance to see how an orb-weaving spider positions itself and captures insect prey, and it poses no meaningful threat to people.
4. Cat-Faced Orbweaver
The cat-faced orbweaver, Araneus gemmoides, is a native North American orbweaver that occurs in Washington and is often seen around homes and gardens. Its broad abdomen may have two raised bumps that suggest pointed ears, although the outline is not equally obvious on every individual; colors range from pale cream to brown or orange. This spider spins a circular web around shrubs, porch lights, eaves, or other insect-rich spots, and females can look substantial when they are full-grown. The species is a good reminder that “big” does not necessarily mean dangerous: it is a web-building insect hunter, and its size and distinctive body shape make it one of the more memorable local garden spiders.
5. Marbled Orbweaver
The marbled orbweaver, Araneus marmoreus, is a North American species with a rounded abdomen marked in variable patterns of cream, orange, yellow, and dark brown. Its striking color can make it seem unfamiliar, but it is an orbweaver, not a dangerous roaming house spider. Look for it in vegetation along woodland edges, trails, and damp garden margins, where it can hang in or beside a circular web. The abdomen’s pattern varies enough that photographs of two individuals may look like different species, so combine that feature with the web and habitat when comparing it with other orbweavers; a close look is rewarding, but there is no need to touch it.
6. Six-Spotted Fishing Spider
The six-spotted fishing spider, Dolomedes triton, is a large, long-legged spider associated with ponds, marshes, and other still or slow-moving water. It can wait at the water’s edge with its legs resting on the surface, sensing vibrations, and may move across the surface or dive to escape danger. The name refers to markings on the underside, which are not always visible during an ordinary encounter, so location and behavior are often more useful clues than the “six spots.” In Western Washington, it is a spider to look for near suitable water rather than in a dry bedroom; its aquatic hunting style is unusual, and it is not seeking people as prey.
7. Wolf Spiders
Wolf spiders are a family, Lycosidae, rather than one single local species, and several kinds occur in Washington. They hunt on the ground instead of using a capture web, so one may turn up moving through leaf litter, a lawn, or a woodpile, or may accidentally wander indoors. Their sturdy, often hairy bodies and quick running can make them seem especially imposing, while close inspection may reveal the prominent eyes typical of wolf spiders. Size and markings differ among species, making a confident species-level identification from a brief glimpse difficult; their ground-hunting habits and lack of a prey-catching web are more reliable clues than color alone.
8. Western Black Widow
The western black widow, Latrodectus hesperus, is the local spider on this list that warrants the most practical caution. Adult females are glossy black, with a red marking—often an hourglass shape—on the underside of the abdomen; they tend to hide in sheltered, undisturbed spaces such as outdoor storage areas, woodpiles, and clutter rather than sit openly on a large garden web. They are not aggressive, but a bite can cause significant symptoms, so do not handle one or reach blindly into a place where it could be hiding. If someone may have been bitten and develops concerning symptoms, seek medical advice or contact poison control rather than relying on a photo-based identification.
9. Black Lace-Weaver
The black lace-weaver, Amaurobius ferox, is an introduced spider established in parts of the Pacific Northwest and often found around buildings. It is dark and fairly robust, with a body much shorter than the leg span of a giant house spider, and it hides in a retreat connected to a web with a woolly, lace-like appearance. Check quiet, sheltered places such as gaps around foundations, retaining walls, and outdoor structures rather than the middle of a sunlit lawn. Although its dark color can prompt comparisons with a widow, it is a different kind of spider with a different web; do not identify it from color alone, and avoid handling it.
10. Long-Bodied Cellar Spider
The long-bodied cellar spider, Pholcus phalangioides, is common in buildings and looks enormous when its exceptionally thin legs are spread out. Its body is small and narrow, so it is a useful example of how leg span can make a spider appear much bigger than its actual body size. It hangs upside down in a loose, irregular web in corners, cellars, garages, and other quiet indoor locations, where it catches small invertebrates. If disturbed, it may shake rapidly in its web, a behavior that can make identification easier; it is not a medically important threat to people, and its delicate appearance is quite different from the heavy-bodied funnel-weavers.
How to Choose
When trying to work out which large spider you have seen, start with the setting and the web rather than the color. A spider in a circular web among garden plants is more likely to be an orbweaver, while a spider in a funnel retreat near the ground points toward a funnel-weaver. A spider at the edge of a pond may be a fishing spider, and a fast-moving spider on leaf litter with no capture web may be a wolf spider. Indoors, a long-legged spider with a small body and a loose web in a corner suggests a cellar spider; a robust, hairy spider near a funnel web suggests a house-dwelling funnel-weaver.
Next, consider what you need from an identification. If you are deciding whether to move a spider, a safe distance and a container are more useful than trying to handle it for a better view. If you are concerned about a widow, look for the glossy black body and red underside marking, but do not put your hand near the spider to check. For a photograph-based identification, include the whole spider, its web if present, and the location where you found it; a clear image from a safe distance is more helpful than a close, blurry shot. Body shape, web structure, and habitat together are much more dependable than a single color or a guessed leg span.
Finally, distinguish size from risk. Several of the biggest-looking local spiders are harmless to people, while the western black widow is smaller than many house spiders but deserves caution because its bite can cause significant symptoms. Most spiders would rather avoid people, and their presence outdoors usually reflects available prey and sheltered habitat, not an attempt to enter a home. If you do not need to identify a spider precisely, leaving it undisturbed is often the simplest choice.
Frequently Asked Questions
What is the biggest spider commonly found in Western Washington homes?
The giant house spider is among the largest spiders people commonly encounter indoors in the region. Its long legs create an impressive span, though the body itself is not as large as the overall appearance suggests.
Are hobo spiders dangerous to people?
Evidence does not support the popular claim that hobo spiders routinely cause severe, tissue-damaging bites. Still, avoid handling them, and seek medical advice for a bite that causes concerning symptoms.
Which local spider should I avoid touching?
Avoid touching any unidentified spider, especially a western black widow. Widows may hide in sheltered outdoor spaces, so use gloves and care when moving stored items or reaching into clutter.
Do big spiders in Washington build webs?
Many do, but not all make the same kind. Orbweavers build circular capture webs, funnel-weavers make a sheet leading into a retreat, and wolf spiders hunt without a prey-catching web.
Should I kill a large spider I find indoors?
Usually there is no need. If you want it outside, guide it into a container without touching it; if you cannot identify it or suspect it is a widow, keep your distance and get help moving it safely.
Final Thoughts
Western Washington’s large spiders range from familiar garden orbweavers to indoor funnel-weavers and water-edge hunters. Web shape, body form, and habitat can narrow down what you are seeing, while a cautious distance matters more than a perfect identification. Most are useful insect predators and are best left alone; treat a possible black widow with extra care.