Drivers in Norwich and across Norfolk are being warned to expect slower journeys on Wednesday morning, February 25, 2026, as fog patches are forecast to form overnight. The Met Office expects these patches to develop primarily in the southern parts of the county from late Tuesday evening.
Humidity levels in the Norwich area are expected to reach 96 per cent, providing the conditions necessary for fog to form. While general visibility in the city is forecast to drop to “moderate” levels (between 4km and 10km) between 10:00 PM on Tuesday and 2:00 AM on Wednesday, localized fog patches could be significantly denser, potentially causing delays for late-night travellers and those on the Wednesday morning commute.
Travel may be particularly difficult near the A47 Norwich Southern Bypass. National Highways has scheduled a full overnight closure of the A47 in both directions between the A140 Ipswich Road and the Thickthorn Roundabout from 8:00 PM Tuesday to 6:00 AM Wednesday for ongoing roadworks. Drivers using diversion routes should be aware that reduced visibility from fog patches could increase the risk of minor accidents and sudden braking.
Norfolk Police and the weather service advise motorists to use dipped headlights instead of full beams in foggy conditions. Full beams can reflect off the fog, creating a “white wall” effect that makes it harder to see. Drivers are also encouraged to check their routes before leaving and allow extra time for their trips.
Motorists are also reminded that it is a legal offence to use front or rear fog lights unless visibility is seriously reduced to less than 100 metres. These lights must be switched off as soon as the fog clears to ensure they do not dazzle other road users or obscure brake lights.
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