Seal Lake (Danish: Sælsøen), also known as Sael Lake, Saelso, Saelsöen and Sælsø, is a land-locked freshwater fjord in southern King Frederick VIII Land, in Greenland's northeastern coast.

[1] The Danish weather station Danmarkshavn —the only inhabited place in the area— lies about 30 km (19 mi) to the east.

The lake and its surroundings are part of the Northeast Greenland National Park zone.

The Seal Lake was named by the Denmark expedition to East Greenland 1906–1908.

A short river discharges its waters in the northern shores of the Dove Bay of the Greenland Sea.