Spiders at home in late summer: why do their numbers suddenly increase in August?
At the end of summer, we often start noticing more spiders on our windows, terrace, in the garage, or in the corners of our homes. One evening, a cobweb appears near the outdoor light; the next, it's already near a window or door. This can create the impression that spiders have suddenly started invading our homes.
In reality, in August and as autumn approaches, some spiders simply become more active and easier to spot. Moreover, the home environment at that time is rich in their primary food source – various insects.
Why does this happen, and what can be done to reduce the number of spiders in and around your home?
Why do we see more spiders at the end of summer?
Spider activity depends on the species, weather conditions, and the amount of food available. By the end of summer, some of them have grown, making them more noticeable.
At the same time, there are still plenty of:
- flies;
- mosquitoes;
- moths;
- midges;
- other small insects.
Where there is abundant prey, there are favourable conditions for spiders.
Therefore, it is worth looking not only for the spiders themselves but also for the reason why a particular spot in the house has become attractive to them.
Why do so many cobwebs appear near windows?
One of the most important factors is evening lighting.
Light near windows and doors attracts flying insects. For a spider, such a location can become an extremely convenient hunting ground.
For this reason, cobwebs are often found:
- in window corners;
- near outdoor doors;
- under canopies;
- near facade lights;
- in terrace structures.
If you clean the web every morning, and it reappears in the same spot a few days later, it is likely that there is still enough food for the spider in the environment.
How do spiders get inside the house?
Spiders can enter through the same openings as other small insects.
Check:
- window seals;
- the gap under outdoor doors;
- garage door edges;
- areas around pipes;
- ventilation openings;
- cracks near windowsills and the facade.
Terrace and balcony doors that are frequently opened are particularly relevant.
If the lights are on inside in the evening and the doors are left open for a long time, not only spiders but also the insects they feed on can enter the premises.
Is cleaning cobwebs enough?
Cleaning cobwebs is worthwhile, but it may not be enough on its own.
If conditions remain favourable, another spider may settle in the same spot.
Therefore, more effective prevention consists of several actions:
- removing existing cobwebs;
- reducing the number of other insects;
- sealing potential entry points;
- organising suitable hiding places for spiders.
This addresses not only the visible problem but also its underlying causes.
Which areas of the house should be checked first?
Window and door corners
Here, spiders can find both shelter and flying insects.
Garage
Garages usually have many quiet, rarely disturbed areas. Cardboard boxes, shelves, and items stored in corners provide additional hiding places.
Basement and storage room
Dark and undisturbed rooms can also be attractive.
Terrace and gazebo
Outdoor lighting attracts insects, so cobwebs can appear particularly quickly in these areas.
Is it worth turning off outdoor lighting?
It is not necessary to completely forgo lighting.
However, it is worth considering whether the lights need to be on all night. Motion sensors or shorter lighting times can reduce the number of insects gathering near the facade.
Fewer insects near the house mean less readily available food for spiders.
This is especially useful near main doors, terraces, and frequently opened windows.
What else can be done around the house?
The environment itself is also important.
Regularly:
- clean old cobwebs;
- remove leaf piles;
- do not leave unnecessary items near the walls;
- trim plants touching the facade;
- clean window and door corners.
Firewood and other items stored for longer periods are also better stored neatly, rather than directly at the entrance to the house.
When is it worth using products for spiders and crawling insects?
If spiders constantly appear in the same places or you find them not only outdoors but also inside the house, special pest control products can be used.
It is important to choose a product suitable for the specific area of use and to follow the instructions on its label.
Even better results can be achieved by controlling other insects simultaneously. If the number of flies, moths, and other small insects near windows and doors decreases, these areas will become less attractive to spiders as well.
Prepare for autumn at the end of summer
August is a good time to inspect windows, doors, the garage, terrace, and other areas through which small pests can enter the home.
Do not wait until cobwebs start appearing in every corner. By eliminating hiding places, reducing the number of insects, and sealing cracks, the problem can be controlled much more effectively.
On Dezis.lt, you will find products for spiders and other crawling and flying insects. Comprehensive protection can help not only to eliminate already observed pests but also to reduce the likelihood of their return as autumn approaches.
