What is the water temperature of the Baltic Sea nostr:npub1hlx26mahecypqppmwqnu5xlust2uq8mz8z0h42sqt9u2qarc5ahsf68mlunostr:npub1hlx26mahecypqppmwqnu5xlust2uq8mz8z0h42sqt9u2qarc5ahsf68mlunostr:npub1hlx26mahecypqppmwqnu5xlust2uq8mz8z0h42sqt9u2qarc5ahsf68mlunostr:npub1hlx26mahecypqppmwqnu5xlust2uq8mz8z0h42sqt9u2qarc5ahsf68mlu ?

In Stockholm there are about 15 degrees Celsius