Their main production are in two lager beers called Koster and Granit, but other brews occur as well.
Koster is a lager beer with 3,5% alcohol and is available for purchase mostly in local supermarkets.
The name is inspired by the cliffs of Bohuslän, where Grebbestad lies, which are made of granite.
Grebbestad produces some beers on behalf of the Gothenburg brewery Göteborgs Nya Bryggeri.
This beer is not part of the Grebbestad brand but is sold to support the sports club Djurgårdens IF.