When is fly season? Flies peak in spring and autumn, when temperatures sit between 20 and 35°C. They drop in midsummer in hot, dry regions and in winter cold. In Jeddah, the west coast and Jazan they are present almost all year.
Fly season through the year
| Season | Status | Reason |
|---|---|---|
| Spring | Peak | Mild heat and moisture after rain |
| Summer | Lower inland, continues on the coast | Extreme heat dries out breeding sites |
| Autumn | Second peak | Weather cools and rain begins |
| Winter | Lower in central and northern regions | Cold slows the life cycle |
Why does temperature matter?
- In warm weather an egg becomes a fly in seven to ten days.
- In the cold the same cycle takes weeks.
- Above 45°C larvae die and waste dries out quickly.
So the same rubbish produces more generations in spring and autumn.
Does rain increase flies?
Yes, indirectly. Rain does not bring flies, but it prepares the breeding ground:
- It wets rubbish, waste and manure, making them suitable for eggs.
- It leaves rotting leaves and grass in yards and gardens.
- It raises humidity, so adult flies live longer.
The wave shows one to two weeks after rain, not the same day.
Where do flies build up in season?
- Near rubbish containers and outdoor kitchens.
- Livestock and poultry sheds and manure areas.
- Restaurants, butchers and vegetable markets.
- Rest houses and farms after rain.
How to prepare before the season
- Start two weeks before the peak: late winter and late summer.
- Cut off breeding sites: lidded bins emptied daily, manure covered and dry.
- Place fly bait around containers and outdoor gathering points.
- Treat larvae in manure and waste with a growth regulator.
- Fit screens and air curtains on doors.
- A light trap indoors and sticky ribbons in stores and sheds.
Products from Orkida
- Advion Fly bait by Syngenta
- Zyrox Fly bait by Syngenta
- Starycide 480 SC by Envu (formerly Bayer)
- Catchmaster sticky ribbons for flying insects
- ProCatch MATRIX light trap
- Orkida economy home fly control kit
Fly season FAQs
Do flies disappear in winter?
They drop sharply in cold regions. On the west coast they stay because winter is warm.
Why are there so many flies this year?
Usually more rain or a nearby breeding source such as a container, a shed or uncovered manure.
Do flies increase in extreme heat?
No, they drop outdoors. They do move into air-conditioned spaces and become more visible inside.
When is the best time to treat for flies?
Before the peak: early spring and early autumn, and with the first wave after rain.