The dominant wind is the Tramontane, no other wind has really a chance against it. It is a wind which blows from Northwest. This wind is created by an anticyclone over the south west of France and a depression over the Mediterranean. When the Tramontane blows it normally blows very strong. Statistics say that there are 300 days a year with a wind over force four. The other wind direction is the Marin which blows from SE.
From Montpellier drive southwest on A9 and follow signs towards Sete and you will get to Balaruc-les-Bains. HEre get to the water next to the Casino at Rue du Mont Saint Clair.