The Narva Bay (also the Gulf of Narva and the Narva Estuary) is a bay

Bay

A bay is an area of water mostly surrounded by land. Bays generally have calmer waters than the surrounding sea, due to the surrounding land blocking some waves and often reducing winds. Bays also exist as an inlet in a lake or pond. A large bay may be called a gulf, a sea, a sound, or a bight...

 in the southern part of the Gulf of Finland

Gulf of Finland

The Gulf of Finland is the easternmost arm of the Baltic Sea. It extends between Finland and Estonia all the way to Saint Petersburg in Russia, where the river Neva drains into it. Other major cities around the gulf include Helsinki and Tallinn...

 divided between Estonia

Estonia

Estonia , officially the Republic of Estonia , is a state in the Baltic region of Northern Europe. It is bordered to the north by the Gulf of Finland, to the west by the Baltic Sea, to the south by Latvia , and to the east by Lake Peipsi and the Russian Federation . Across the Baltic Sea lies...

 and Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

. The Kurgalsky Peninsula

Kurgalsky Peninsula

The Kurgalsky Peninsula is a peninsula that divides the southern part of the Gulf of Finland into the Narva Bay and the Luga Bay . The northernmost spot is Cape Pitkenen-Nos. The peninsula is rather swampy and contains several lakes. About 650 km² of wetland are protected as a Ramsar site...

 separates it from the Luga Bay

Luga Bay

The Luga Bay is a shallow bay near the southern Russian coast of the Gulf of Finland. It is free of ice 326 days a year. Kurgalsky Peninsula separates the bay from the Bay of Narva to the west, while the Soikinsky Peninsula separates it from the Koporye Bay to the east. The Luga River empties into...

 to the east. The bay is about 40 kilometres (24.9 mi) long and 90 kilometres (55.9 mi) wide at its mouth. The eastern shore is low and sandy, while the south coast is rather steep. The bay is covered by ice from December to March. The Narva River

Narva River

The Narva is a river flowing into the Baltic Sea, the largest river in Estonia. Draining Lake Peipsi, the river forms the border of Estonia and Russia and flows through the towns of Narva/Ivangorod and Narva-Jõesuu into Narva Bay. Though the river is only 77 km long, in terms of volume...

 flows into the bay near the town of Narva-Jõesuu

Narva-Jõesuu

Narva-Jõesuu is a town in Ida-Viru County, Estonia, located on the country's northern Baltic Sea coast near the Russian border. The name of the town in Estonian and Russian means "mouth of the Narva River"....

.