The highest point on the island is 3 metres above sea level. The island's coastline is 760 m long.
Birds
From 1986 - 2010, the largest cormorant colony in Estonia was located on the island.[1]
Nature Conservation
The island is protected as a nature reserve due to its birdlife and flora. It is restricted for anyone to enter, land on, or establish economic activities on the Tondirahu. It is also prohibited to dredge or drill on Tondirahu.[2]