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Start with the whole approach behind Play Plans & Challenges.
See Play Plans & ChallengesOrdinary UK breezy weather is fine for a football session outside.
Playing football with kids in windy weather comes down to one adaptation: keep the ball on the ground rather than in the air, since wind ruins a lofted pass long before it ruins a rolling one.
I used to call the whole session off the moment it got properly gusty, until I noticed every chipped pass I attempted sailed miles off course while every ground pass arrived exactly where it was meant to.

The one thing to change
A lofted pass or chipped shot has nothing to hold its line once it's in the air, so distance and direction both drift with the gusts. A rolling pass or a ground-level shot barely notices the same wind.
Football games work best in a windy garden when every drill or target game is played along the grass, not through the air. That keeps things fun on a blustery day, rather than a constant chase after a ball that never lands where it was aimed.

A playful reframe
A strong wind at your back is easy to put to good use without touching the ball at all. Turn it into a quick sprint race down the garden, since running with the wind behind you feels properly quicker, and it's a fun few minutes while the football itself stays low and steady on the ground.
Real guidance, plainly put
During genuinely strong wind, Met Office guidance on staying safe in strong wind is to stay indoors as much as possible. If you do go outside, avoid walking or sheltering close to buildings and trees, and secure loose garden objects like garden furniture or trampolines that could be blown into people or windows. Keeping kids safe playing football in a small garden during windy weather mostly comes down to that same guidance, scaled down to your own space.
The actual signal to stop
If today's the day it needs to move indoors entirely, this indoor swap plan covers exactly that.
Quick answers
Usually yes, for ordinary breezy UK weather. Keep the ball on the ground rather than in the air, and only stop for an official strong-wind warning.
Play everything along the ground, rolling passes and low shots, since wind ruins a lofted pass long before it ruins one that never leaves the grass.
On a day with an official strong-wind warning for your area, not just an ordinary blustery afternoon.
Keep going
Three places to go next, depending on what today's weather is doing. If the wind is blowing pollen about, football when your child has hay fever has the timings and the reset. And if the wind keeps taking a pop up goal with it, how to stop a pop up goal blowing away has fixes.
Start with the whole approach behind Play Plans & Challenges.
See Play Plans & ChallengesThe same plain checklist, built for a frosty evening.
See the cold checklistThe same plain checklist, built for the other end of the year.
See the heat checklistTonight's five minutes
That's genuinely the whole adaptation.