Met Office issues overnight fog warning across Northern Ireland with visibility below 100 metres possible

Sunday 8 November 2026

Motorists across Northern Ireland are being warned of potentially hazardous driving conditions overnight and during Monday morning's commute, with dense fog expected to reduce visibility to less than 100 metres in some areas.

The Met Office has issued a yellow weather warning covering all six counties, with fog patches developing overnight and potentially causing disruption to travel as people make their way to work and school on Monday 9 November.

The warning came into force at 10pm on Sunday and remains in place until 10am on Monday.

Visibility could fall below 100 metres

According to the Met Office, areas of fog will continue to develop through Sunday night and into the early hours of Monday, becoming particularly dense in places.

Visibility could fall below 100 metres, making it difficult for drivers to see the road ahead, other vehicles and potential hazards.

The fog is expected to gradually lift and clear during Monday morning, although conditions may remain difficult in affected areas before visibility improves.

All six Northern Ireland counties affected

The yellow warning applies across the whole of Northern Ireland, including Ballymena and the wider County Antrim area.

While the warning covers all six counties, fog is expected to develop in patches, meaning conditions may vary considerably between locations.

Advice for Monday morning motorists

Drivers travelling overnight or early on Monday should be prepared for sudden reductions in visibility, particularly where fog becomes dense.

Motorists are advised to reduce their speed, leave additional distance between vehicles and use dipped headlights when visibility is poor.

Front or rear fog lights should be used when visibility is seriously reduced, generally below 100 metres, and switched off when conditions improve to avoid dazzling other road users.

Those travelling to work, school or appointments on Monday morning should allow additional time where necessary and remain alert to changing conditions.

Warning remains until 10am Monday

The Met Office expects the fog to gradually lift and clear during Monday morning, with the yellow warning scheduled to expire at 10am.

For motorists across Ballymena and the wider region, the greatest concern will be reduced visibility during the overnight period and early morning journeys, before conditions begin to improve.