Back Seevlak AF Livel d'a mar AN مستوى سطح البحر Arabic Nivel de la mar AST Dəniz səviyyəsi AZ دنیز سطحی AZB Диңгеҙ кимәле BA Узровень мора BE Морско равнище Bulgarian समुंद्र तल BH
- For the effects of global warming on sea levels, see global warming
The sea level is the average height of the ocean (informally called the sea). The word 'average' must be used because the height of the sea changes with the tides. The height of mountains, countries, and so on, is almost always given as "above sea level".