Matsalu Bay Matsalu Bay is a bay in Matsalu National Park Matsalu National Park is a nature reserve in SW of Estonia. in Estonia and is under protection. is a bay in Matsalu National Park Matsalu National Park is a nature reserve in SW of Estonia. in Estonia and is under protection. Matsalu Bay Matsalu Bay is a bay in Matsalu National Park Matsalu National Park is a nature reserve in SW of Estonia. in Estonia and is under protection. is located in Lääne County County on the west of Estonia (pop. 25,000). , part of Väinameri, and is one of Europe's most important wetland bird areas. The Bay is located in the prime position on the east Atlantic Flyway. Every spring, over two million waterfowl pass Matsalu.