Sea temperatures Belgium Sea temperature Ostend Created with Highcharts 3.0.8Sea temperature444444485359626464605750JanFebMarAprMayJuneJulAugustSeptOctNovDec0 °10 °20 °30 °40 °50 °60 °70 ° Jan Feb March April May June Jul August sept. Oct nov. dec. Sea temperature44°44°44°48°53°59°62°64°64°60°57°50°