Strong winds across southern and western England on Friday and into Saturday will coincide with high tides.
This is likely to cause large waves and spray which could lead to coastal flooding along the south and south-west coast.
Ben Lukey , National Flood Duty Manager for the Environment Agency, said:
Environment Agency teams are on the ground, checking defences and taking precautionary action to close tidal gates and put up temporary barriers. We’re working with the Met Office and local authorities and are ready to respond as necessary.
We urge people to stay safe along the coast and warn against putting yourself in unnecessary danger by taking ‘storm selfies’ or driving through flood water – just 30cm is enough to move your car.
You can check whether you’re affected at www.gov.uk/flood. We will issue flood alerts and warnings as needed, so please sign up to receive them for free online or by calling 0345 988 1188.