Seealpsee is a lake in the Alpstein range of the canton of Appenzell Innerrhoden, Switzerland. At an elevation of 1143 m, the surface area is 13.6 hectares. The lake can be reached by foot from Wasserauen or from Ebenalp. A network of routes around Ebenalp connects Seealpsee with other notable sights in the Appenzell Alps, such as the Wildkirchli and Säntis.