The Gulf of Finland extends east for 260 miles between Finland on the north and Estonia and Russia on the south. The Karelian Isthmus lies at the extreme eastern end of the gulf, separating it from Ladoga Lake. Sandbars, rocks, and winter ice make navigation challenging. The Gulf is also known by the following names; Finnischer Meerbusen, Finska Viken, Finskiy Zaliv, Somu Juras Licis, Suomen Lahti and Suomiu Ilanka
The Baltic Sea lies to the west. It receives the drainage from a large part of northern Europe. As a result of this drainage and of the restricted channel to the North Sea, the surface water of the Baltic contains relatively little salt, only a third as much as the Atlantic Ocean. Currents flow constantly from the Baltic to the North Sea. Tidal action is apparent only in the southern part of the Baltic. Weather in the Baltic Sea can be extreme with frequent storms. Easterly winds are particularly dangerous because they create huge waves. Navigation in the northern part of the Baltic is suspended during the winter and early spring because of ice. The Baltic Sea is also known as; Östersöen, Balti Meri, Baltijas Jura, Baltiyskoye More, Itämeri, Läänemeri, Morze Baltyckie or Ost-see
The west coast of Finland lies on the Gulf of Bothnia. Many rivers flow into the shallow gulf, lowering its salinity and causing much of it to freeze during the winter months. The gulf extends inland from the Baltic Sea, separating Sweden on the west from Finland on the east. It is about 400 miles long and between 50 miles and 149 miles wide. In the southern end, the Åland Islands separate the Gulf of Bothnia from the Baltic Sea and these 7,000 small islands make navigation challenging. At the northern end of the gulf, Luleå in Sweden, lies at one end of an archipelago of 300 small islands. It is a popular starting point for travellers on their way to Saamiland or Lapland. The Gulf of Bothnia is also known as; Bottnischer Meerbusen, Golfe de Botnie or Pohjan Lahti
Weather for the Yacht Charter Area of Finland