Yes, you can swim in the ocean in Hermanus, but this is not always advisable depending on the conditions. Hermanus is on the coast of the Atlantic Ocean, which tends to be colder than other oceans. Even in the summer, the water can be quite chilly. However, many locals enjoy swimming and surfing in the ocean. It is important to know that there are sometimes strong rip currents and rough waves, so always check the conditions before going into the water. Whale watching from the shore is also a popular activity in Hermanus.