Five days is a good amount of time on the south coast. You can see the main towns, spend real time on the beach, eat well, and leave without feeling like you rushed through everything. The mistake most people make is trying to see too many places, which means spending a third of the trip in a tuk-tuk or taxi.
Here is a route that actually works.
Day 1: Arrive in Galle. Get there by mid-morning if possible. Drop your bag, walk the ramparts in the early afternoon before it gets too hot, and spend the rest of the day in the back lanes of the fort. Eat dinner inside the fort or just outside it. Sleep in Galle or Unawatuna, five minutes away.
Day 2: A slower morning in Galle. The fort is at its best before 9am, so if you have not done the rampart walk yet, do it now. After that, take a tuk-tuk to Jungle Beach in Unawatuna for a swim. It is a ten-minute walk through the forest from the road and noticeably quieter than the main Unawatuna beach. Spend the afternoon there. In the evening, move to Weligama.
Day 3: A full day in Weligama. The bay is calm and long, good for swimming in the morning. If you want to surf, Weligama's main beach is the easiest beginner wave on the coast. Most surf schools here charge around 3,000 to 5,000 rupees for a two-hour lesson including board rental. In the afternoon, walk the length of the bay toward the quieter eastern end. Eat dinner in Weligama. There are several good local restaurants one street back from the beach that cost a fraction of the beachfront places.
Day 4: Day trip to Mirissa in the morning, then Ahangama in the afternoon. From Weligama, Mirissa is about 15 minutes by tuk-tuk. Walk to Coconut Tree Hill early, before it fills up. Parrot Rock is worth a short swim if the sea is calm. Have lunch back in Weligama and then take a tuk-tuk to Ahangama, about 10 minutes east toward Galle. Ahangama has some of the best cafes on the south coast and a surf break at Kabalana that more experienced surfers rate highly. Have a long afternoon coffee and come back in the evening.
Day 5: Move to Hiriketiya. It is about 30 minutes from Weligama and feels like a different world. A small horseshoe bay, no nightlife, good coffee, consistent surf. Spend the day there. If you are leaving from Colombo the following morning, take an evening taxi or car back toward Galle and stay there, which keeps your journey the next day short.
A note on what this route skips. Tangalle and Tissamaharama are both worth visiting, but five days is not enough to add them without shortchanging everything else. If you have seven or more days, extend east after Hiriketiya. If five is all you have, the above route gives you Galle, Weligama, Mirissa, and Hiriketiya without feeling like you saw them all from a moving vehicle.
Want a version of this built around your specific dates, travel style, and budget? That is what we do.