Encara no tenim significats per a "become southwesterly".
1The wind along the coast will be light to moderate easterly becoming southwesterly by evening.
2The wind along the coast will be light northwesterly early morning, otherwise light to moderate westerly becoming southwesterly.
3The Eastern half -Wind: The wind along the coast will be fresh to strong north-easterly ,becomingsouthwesterly overnight.
4The wind along the coast will be strong northwesterly but moderate easterly in the south becoming southwesterly in the afternoon.
5The wind along the coast will be fresh to strong northwesterly but moderate northeasterly along the south coast at first becoming southwesterly.