The Spanish translation for Sea is Mar. It can be used as noun. This word often comes up when talking about nature & weather. It is classified as a A1 word, and is the 480th most common word in Spanish. You can find example sentences below to provide context, and you can also listen to how the word is pronounced by clicking on the speaker icon. Download our app to practice the 3000 most common Spanish words, including this one, with over 60,000 example sentences, pronunciations, and various practice types.