Walkers warned over strong waves in France this week

Coastal walkers in north and west France are being warned to stay vigilant as powerful waves are forecast over the coming days. 

Waves reaching a maximum coefficient - the size of a tide's range - on the measurement scale (106 out of 106), are expected in waters around Brittany, with high levels also expected along the English Channel and Atlantic ocean.

These will bring high waters to the Normandy, Brittany, and Nouvelle-Aquitaine coastlines among others, potentially until the weekend.

Currently, tier-two yellow warnings for coastal flooding from high waves are in place across the western coastline, from Finistère to Charente-Maritime today (November 5) and extending down to the Pyrénées-Atlantiques on Thursday (November 6). 

These may be extended or heightened based on how conditions progress.

In Normandy and Brittany waves of up to four metres may hit the coast over the coming days.

Walkers should remain careful

While high waves can potentially lead to flooding, warnings are more concentrated on those spending time in the sea or along coastlines during the period.

Powerful currents in the water at deeper levels can of course impact those fishing and others in boats, but people in more shallow waters can also be taken by surprise. 

These waves further out at sea can quickly change tides on coastlines, leading to a rapid rise in water levels between low and high tide.

In addition, the tidal range (the difference between low and high tide) can change greatly during periods of strong waves. 

This can affect people both in the water and along the coast during periods of strong waves.

Last year, more than 400 walkers in France were stranded by rising sea levels along the English Channel. 

Advice includes sticking to walking routes you are familiar with, and if concerned about rising tides, to stay inland. 

You can keep up with wave levels using this website.