The Orwell Bridge outside of Ipswich is set to close on Friday as wind speeds in excess of 70mph from Storm Eunice arrive in Suffolk.
National Highways, which manages the road network, said on Twitter a road closure is "likely" throughout the day.
The bridge remained open over Wednesday night despite gales from Storm Dudley, which brought down dozens of trees across the county.
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National Highways said a decision on the closure will be confirmed later on Thursday.
The bridge typically used to close whenever wind speeds reached a certain threshold, but a 40mph speed limit is now often introduced instead.
For up-to-date information about the county's roads, visit our LIVE Suffolk traffic map.
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