Best time to visit- Winter Season: November - April The beaches are at their best at this time with fine weather and calm seas. Summer Season: May – October During the off season, Mirissa becomes quiet and sea gets a bit rough but it is still popular especially at weekends with crowds from Colombo coming to spend the day here. Whale and dolphin watching: You can easily get good views of dolphins, as they will be in a big group jumping out of the water for a long time, but don't expect much from the whales: they are elusive, and you'll most likely only see a bit of their back for a brief second when they come out for air. The boats will chase them around until you get four or five of these sightings, and then head back home. If the engine doesn't fail, you'll be boarding at 6:30, leave the harbour at 7:00, and be back by 11:00. Some boats have plastic chairs, others have benches, others have mattresses on the upper deck floor.and All of them include a cup of coffee or tea, a small bottle of water, some breakfast, bananas, pineapple and watermelon.