Sea temperatures Jersey Sea temperature Saint Helier Created with Highcharts 3.0.8Sea temperature504848505357606264625753JanFebMarAprMayJuneJulAugustSeptOctNovDec0 °10 °20 °30 °40 °50 °60 °70 ° Jan Feb March April May June Jul August sept. Oct nov. dec. Sea temperature50°48°48°50°53°57°60°62°64°62°57°53°