The northern French départements of Finistère and Morbihan are on orange alert for coastal flooding and heavy rain until 4pm on Tuesday.
The western département of Loire-Atlantique is on alert for extremely strong waves and possible coastal flooding.
Map: Méteo France
French weather forecaster Méteo France issued the alert, saying: “Storm Brendan is circulating in the north-west of Ireland, the associated disturbance will sweep across the French Atlantic coast at the end of the day and the following night.”
Strong winds of up to 100km/h are forecast for Brittany and Pays-de-la-Loire and the whole of northern France will see strong winds and rain on Tuesday.