When Are Stink Bugs Most Active? The most active season for stink bugs is primarily March through September. But, if temperatures rise significantly during the winter, stink bug season can continue well into the winter months.

What time of year are stink bugs most active?

As soon as temperatures drop — usually in late September — stink bugs are more and more prevalent. According to Orkin, "Brown Marmorated Stink Bugs," often referred to as simply "stink bugs," are the most active from March to September. The peak season is during fall months.

Why do I suddenly have stink bugs?

In late summer and early fall, shorter days and decreasing temperatures cause stink bugs to seek shelter for diapause, a period in their life cycle where they are inactive. When stink bugs locate a suitable location, they release an aggregation pheromone that attracts other stink bugs to the site.