Why they show up when they do
The brown marmorated stink bug — the species behind most Hampton Roads home invasions — can't survive winter outdoors. As temperatures drop in fall, they go looking for a warm, dry, sheltered spot, and a house fits exactly what they're built to find. That migration indoors typically ramps up starting mid-September and continues through October.
Once inside, they don't reproduce or bite — but they show up in real numbers, release an unpleasant odor when disturbed, and tend to reappear on unseasonably warm winter days when they briefly wake from dormancy looking for a way back outside.
They're flat enough to squeeze through gaps that look too small to matter — around window and door frames, unsealed utility penetrations, damaged vent screens, and gaps where siding meets the foundation.
Portsmouth's historic districts are a real factor: the century-plus-old homes in Olde Towne and the wood-trimmed bungalows of Cradock have had decades of settling and aging trim to develop the gaps stink bugs use, more so than the newer construction further out toward Churchland.
What actually stops the fall wave
- Sealing entry points before the migration ramps up — window and door frames, utility penetrations, vent screens, foundation gaps
- Exterior perimeter treatment timed before mid-September, not after they're already inside
- Vacuuming (not crushing) any that make it in, to avoid the defensive odor
- Addressing the same gaps that let in other fall invaders like mice — sealing work does double duty
The full fall pest-proofing guide
For a deeper walkthrough of the fall migration timeline and a full home-sealing checklist, see our guide: Stink Bugs Are Coming: How to Pest-Proof Your Hampton Roads Home Before Fall →
Every corner of Portsmouth
We know Portsmouth block by block — from the cobblestone streets of Olde Towne along High Street, across the Elizabeth River to Churchland, through the historic bungalows of Cradock near Paradise Creek Park, and out to Park View, Port Norfolk, and Cavalier Manor.
Stink bug questions
No. Stink bugs don't bite or sting people. The concern is the large numbers that can gather indoors starting in fall, and the odor they release when disturbed or crushed.
Stink bugs that made it indoors in fall go dormant for winter, but unseasonably warm days can wake them up, sending them looking for a way back outside — which is why they sometimes reappear well after the fall migration ends.
Stink bugs release a defensive odor when they feel threatened, disturbed, or crushed. Vacuuming rather than crushing them, and sealing entry points so fewer get inside in the first place, both help minimize it.
Sealing the gaps they used to get in — around windows, doors, utility penetrations, and damaged vent screens — combined with exterior treatment timed before the fall migration peaks in mid-September, is what actually reduces the problem year over year, not just treating the ones already inside.
Yes — we regularly service homes and businesses throughout Portsmouth, from Olde Towne and Cradock to Churchland, Park View, and Port Norfolk. If you're anywhere in Portsmouth, we can typically schedule within the week.
Rather just talk to someone?
Call (757) 358-6571 — a real person answers, seven days a week.