The seas that border the western coast of Italy are the Tyrrhenian Sea and the Ligurian Sea. The Tyrrhenian Sea lies to the west of Italy and is known for its picturesque coastal towns, beautiful islands, and rich marine biodiversity. The Ligurian Sea, located to the northwest, is part of the larger Mediterranean Sea and is home to famous destinations like the Italian Riviera and Genoa. Both seas play a crucial role in Italy's maritime trade, tourism, and cultural heritage.