All About Crete Weather. Weather in Platanias. This detailed 10 Day Weather Forecast in Crete for Platanias, Chania Prefecture is prepared for the local ex-pat residents and holidaymakers. Platanias (Greek: Πλατανιάς), often referred to as Agia Marina is one of the most popular resorts in Western Crete for the British holidaymaker, just along the northern coastline heading west from Chania. Every major holiday package tour operator serves Platanias. Holiday Weather Tip: Platanias does not have the best of beaches but good for sunbathing and to get a tan from the long sunny days in Summer. Winds in the summertime are South South East prevailing. Surfers using Platanias prefer winds when they come from a northerly direction.