Communities in Maldon, in Essex, are being advised to move pets to safety, avoid coastal paths and promenades, and postpone road journeys where possible.
It comes as the Environment Agency issued flood warnings for Norfolk, Suffolk and Essex.
High tide is expected in Maldon just before 5pm.
The Environment Agency is warning that businesses and homes alongs the waterfront and The Hythe could be at risk.
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A mild, windy and cloudy day with perhaps some brief breaks in the cloud. The cloud may be thick enough at times for light drizzle at times.
Mild, windy and mainly dry.
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