Flying ants swarm UK as Brits urged to do one thing to protect their homes

An insectexpert says mid-August could see UK skies filled with flying ants. A peculiar annual phenomenon known as Flying Ant Week has now kicked-off and there's one thing every household should do in preparation.

According to Dr Nathaniel Green who has studied insect behaviour for over two decades, the conditions are "lining up perfectly" for a concentrated burst of flying ants. In 2025, he predicts the peak will be between today (August 13) and August 18.

It is the combination of warm temperatures, high humidity and still air that create optimal conditions for millions of ants to take flight. It comes after a heatwave forecast with maps reveals the exact date a 39C heat plume will scorch the UK.

READ MORE: UK households urged to remove 3 items from garden to stop influx of ants

READ MORE: RSPCA's stark warning to anyone wanting to walk their dog during heatwave

"When the weather hits that sweet spot, it’s like a signal for ants everywhere to take to the air at once," Dr Green said. Swarms will be particularly active in the afternoons and so he urges Brits to keep their windows "firmly shut".

Dr Green explains that dirty windows could be an open invitation to these flying pests. "Smears and dust on glass can reflect light in a way that draws insects closer. Add in pollen or organic residue and you’ve basically got an insect buffet," he says.

So in addition to keeping your windows closed during peak hours, keeping them clean will make your home "far less attractive" to flying ants. It should be noted though that, while they may be unwanted guests, these insectsare not dangerous.

The other good news? Flying ant swarms do not last very long. "The flying phase only lasts a few days," Dr Green said. "Males die soon after mating, and fertilised queens land to start new colonies."

If you aren’t swift enough to keep your windows shut in time to avoid intrusion, it’s easy enough to rid your home of ants. One natural remedy in particular works like a charm.

As previously reported by Country Living, a good way to deter flying ants from swarming your food is to mix up a homemade peppermint spray.

You can create the spray by adding a few droplets of peppermint oil to a spray bottle and mix well with water or dish soap. Although referred to as "Flying Ant Week", this event actually takes place over approximately 45 days, peaking on two or three days.

Shedding light on this phenomenon, Paul Blackhurst, technical academy head at Rentokil Pest Control, said: "Experts warn that this year could see larger-than-usual swarms of flying ants, as we approach Flying Ant Day, also known as the nuptial flight, and sometimes nicknamed 'flant day'.

"This natural event, when vast numbers of winged ants, known as alates, take to the skies at once in search of mates from other colonies, could be one of the most prolific for years.

"The alternating wet and warm weather we have been experiencing recently is creating the perfect conditions for larger-than-usual swarms, as humidity is important in keeping the ants' wings and bodies moist during flight and 'mating on the wing'."