August can be a time when silverfish become more visible - however, there is no clearly defined peak season. Silverfish are active year-round indoors. However, warm temperatures and high humidity create favorable conditions, which is why they may be noticed more frequently during the summer months.
From practical experience: During warm and humid periods, silverfish may be particularly noticeable in bathrooms, kitchens, basements, and laundry rooms.
Why are silverfish more common in August?
Silverfish prefer warm, humid, and dark areas. The German Environment Agency states that a relative humidity of around 75 to 97 % is particularly favorable for silverfish. Typical habitats are therefore bathrooms, kitchens, laundry rooms, and basements.
As temperature and humidity rise in summer, these conditions can intensify in poorly ventilated rooms. An increased occurrence of silverfish can therefore also indicate persistently elevated humidity or moisture damage.
The following overview is a practical guide for indoor spaces. Silverfish can occur regardless of the month; humidity, warmth, and suitable hiding places are the main factors.
| Month | Typical conditions | Visible signs | Suitable measure | Suitable Kaeferling Pro product |
| June | Rising temperatures, with sometimes higher indoor humidity | Individual insects at night in the bathroom or kitchen | Check the indoor climate and monitor initial routes of movement | S-Trap silverfish trap |
| July | Warm rooms, humid bathrooms, and basements | More frequent sightings along baseboards and in cracks | Ventilate, check the causes of humidity, and use monitoring | S-Trap silverfish trap |
| August | Warm, humid conditions can encourage activity | Silverfish are more frequently noticed at night | Reduce humidity, check hiding places, and monitor the infestation | Kaeferling Pro silverfish set |
| September | Moisture may persist indoors | Animals or trap counts still present | Continue reducing the causes and monitor development | Silverfish Set/S-Trap |
| Year-round | Damp indoor spaces allow them to persist year-round | recurring sightings despite the season | Improve the indoor climate permanently and take targeted action in the event of a severe infestation | Depending on the infestation: monitoring or a complete set |
What helps against silverfish in August?
1. Reduce humidity
Silverfish need a warm, humid climate. Regular airing, sufficient heating, and eliminating moisture problems can significantly worsen these conditions.
2. Check hiding places
Check cracks, crevices, baseboards, areas behind furniture, and damp spots in bathrooms, kitchens, and basements. Hiding places can be cleaned regularly or sealed if possible.
3. Place traps correctly
Place monitoring traps along typical routes, for example by baseboards, near cracks, or in damp areas. Check the traps regularly to assess the activity and development of the infestation.
→ View silverfish traps for infestation monitoring
4. Take targeted action in the event of a severe infestation
If the infestation persists despite moisture control and monitoring, further control measures may be necessary depending on the situation. For biocidal products, the authorization, user category, label, and instructions for use must always be observed.
Professional help for severe infestations
Are silverfish still appearing despite taking action?
In the case of a severe or recurring infestation, an expert assessment may be advisable. The Kaeferling Service provides support with infestation analysis and professional on-site pest control.
Silverfish or paperfish - the key differences
Silverfish and paperfish look similar at first glance, but differ significantly in their preferred indoor climate and the potential damage they can cause. Accurate identification is important because it determines the appropriate measures.
| Characteristic | Silverfish | Paperfish |
| Size | usually approx. 9-11 mm | somewhat larger, up to about 15 mm |
| Color | silvery, shiny | rather gray to brownish |
| Preferred climate | very humid and warm | can also cope with dry, warmer rooms |
| Typical locations | Bathroom, kitchen, laundry room, basement | Living areas, offices, archives, storage areas |
| Activity | mainly active at night, highly light-averse | also usually nocturnal, but may occur more frequently outside very humid rooms |
| Possible damage | usually causes little material damage, often indicating increased moisture | may damage paper, books, cardboard, and wallpaper |
| Important note | More pronounced activity may indicate a moisture problem |
An infestation can also spread very well in dry areas |
| Climbing behavior | more often found close to the ground; smooth vertical surfaces are climbed much less frequently |
good climbers, and are also more frequently observed on walls and in elevated areas |
Practical tip: If the insects are regularly found on walls, shelves, or in elevated areas, this is more likely to indicate paperfish. Silverfish, on the other hand, are more commonly found close to the ground in damp areas. However, this characteristic alone is not sufficient for reliable species identification.
In short:
Silverfish are primarily an indication of warm, humid conditions, whereas paperfish also colonize dry living and storage areas and can particularly damage paper- and starch-based materials there.
Conclusion: Identify silverfish in August and take the right action
Silverfish are primarily found where it is warm, humid, and dark. In August, these conditions can be particularly favorable indoors, which is why the insects become visible more often. The key factors are therefore controlling humidity, eliminating potential hiding places, and targeted monitoring.
Anyone who regularly discovers silverfish should also check whether they are actually silverfish or paperfish, as the two species differ in their way of life and preferred conditions. With suitable traps, an improved indoor climate, and targeted measures, an infestation can usually be controlled effectively. In cases of a severe or persistent infestation, professional assistance may be advisable.
Frequently asked questions about silverfish in August - and answers
Is August peak season for silverfish?
Not in the sense of a fixed biological season. Silverfish live in buildings year-round. However, warm and humid conditions in summer can cause them to become active or visible more frequently.
Why do I see more silverfish in August?
Warm temperatures and increased humidity are often the cause. Particularly damp rooms such as bathrooms, kitchens, or basements provide favorable conditions.
How can I reduce humidity to control silverfish?
Regular airing, adequate heating, and eliminating sources of moisture help make the indoor climate less favorable for silverfish.
Where should silverfish traps be placed?
Place traps along typical paths – for example, along skirting boards, near cracks, and in bathrooms, kitchens, or other damp areas.
How quickly can silverfish be controlled?
This depends on the severity and cause of the infestation. As long as persistently high humidity or suitable hiding places remain, the infestation may recur. Monitoring and addressing the underlying cause should therefore be combined.
Are silverfish harmful to health?
Silverfish are not considered disease carriers and normally do not pose a direct health risk. However, a more severe infestation may indicate a moisture problem.
When should professional help be sought?
If the infestation cannot be contained despite moisture control and appropriate measures, or if potential moisture damage is unclear, professional assistance should be considered. The UBA also recommends consulting a pest control company in cases of silverfish infestations that cannot be contained.
Professional control with Kaeferling Service
