The easternmost of two neighboring waterfalls – the other is Háifoss. Granni is somewhat less tall – around 100 m. Water for the most part falls in a plunge, there are two main steps.
| Location, GPS coordinates: | 64.2092 N 19.6828 W |
| Categories: | Waterfalls |
| Values: | Geology, Visual |
| Rating: |  (3 / 5) |
| Where is located? | Europe, Iceland, Suðurland, on Fossá River which falls in Þjórsadalur Valley |
| Height: | around 100 m |
| Drops: | 2 |
| Stream: | Fossá |
