Plettenberg Bay is typified by an extremely mild maritime temperate climate with very few rainfall or temperature extremes. It is located within the Knysna Afromontane Forest biome, containing temperate gallery forest, supported by the mild temperatures and high, even distributed rainfall. Here follows the records for the closest climate station just to the east in the Tsitsikamma:

Maximum/minimum temperatures: January: 23°C/17 °C; July: 17 °C/10 °C; rainfall: 945 mm per annum.