The municipality is made up by the main valley, Surnadalen through which the river Surna runs.
 There are also many smaller side valleys including Stor-Bæverdalen, Settemsdalen, Øvstbødalen, Todalen, and Vinddøldalen.
The municipality is bordered by the Trollheimen mountain range and Sunndal Municipality to the south, the neighboring Rindal Municipality to the east, Halsa Municipality to the north, and several fjords to the west: Trongfjorden, Stangvikfjorden, and Todalsfjorden.
 There are three main fjords that cut into the municipality: Åsskardfjorden, Hamnesfjorden, and Surnadalsfjorden.

The landscape is a combination of forests, fjords, and mountains.
The highest mountain peak is Snota at 1,668 metres (5,472 ft) above sea level.
 Other mountains include Vassnebba, Indre Sula and Ytre Sula, Neådalssnota, and Trollhetta.
 The river Surna runs through the valley from the east to the west, and forms a large delta where it enters the fjord near Surnadalsøra and Skei.
This river is rich in salmon, which attract tourists from the rest of the country and abroad.
 The lakes Foldsjøen and Gråsjøen lie along the border with the municipality of Rindal in the east.
The Grønkjølen Nature Reserve lies in the extreme northeast of the municipality.
The municipality is made up by the main valley, Surnadalen through which the river Surna runs.  There are also many smaller side valleys including Stor-Bæverdalen, Settemsdalen, Øvstbødalen, Todalen, and Vinddøldalen. The municipality is bordered by the Trollheimen mountain range and Sunndal Municipality to the south, the neighboring Rindal Municipality to the east, Halsa Municipality to the north, and several fjords to the west: Trongfjorden, Stangvikfjorden, and Todalsfjorden.  There are three main fjords that cut into the municipality: Åsskardfjorden, Hamnesfjorden, and Surnadalsfjorden.
The landscape is a combination of forests, fjords, and mountains. The highest mountain peak is Snota at 1,668 metres (5,472 ft) above sea level.  Other mountains include Vassnebba, Indre Sula and Ytre Sula, Neådalssnota, and Trollhetta.  The river Surna runs through the valley from the east to the west, and forms a large delta where it enters the fjord near Surnadalsøra and Skei. This river is rich in salmon, which attract tourists from the rest of the country and abroad.  The lakes Foldsjøen and Gråsjøen lie along the border with the municipality of Rindal in the east. The Grønkjølen Nature Reserve lies in the extreme northeast of the municipality.
Surnadal