Sea temperatures Poland Sea temperature Gdańsk Created with Highcharts 3.0.8Sea temperature373735415059666662555042JanFebMarAprMayJuneJulAugustSeptOctNovDec0 °10 °20 °30 °40 °50 °60 °70 ° Jan Feb March April May June Jul August sept. Oct nov. dec. Sea temperature37°37°35°41°50°59°66°66°62°55°50°42°