When to go to Hiriketiya, month by month

The four seasons on this coast

Sri Lanka has two monsoons. A monsoon is a season when a steady wind blows from the same side for months. Between the two monsoons come shorter change-over seasons. Hiriketiya faces south, so the wind changes the bay a lot.

• December to February, the north-east monsoon: a dry wind blows from the land out to sea. The water in the bay is usually calm, and the waves are small and clean.
• March and April, the first change-over: the wind is light and the days are hot. Storms often come in the afternoon or evening.
• May to September, the monsoon from the south-west: a strong wind blows in from the sea. The water gets choppy, and the waves are bigger and messy. The heaviest rain falls further west, around Galle.
• October and November, the second change-over: thunderstorms are common. Storms over the Bay of Bengal can bring strong wind and heavy rain to the whole island.

Hiriketiya month by month

Every year is a little different, but this is what each month is usually like. First surf lessons happen on the sandy part of the bay. The reef is the fast wave at the east end, for strong surfers only.

The sea words are based on the official seasons and warnings, and on computer models of the waves just outside the bay. In the models for 2021 to 2025, waves of 2 metres or more came on 0 to 2% of days from January to April. From May to September they came on 38 to 58% of days. The bay is sheltered, so the waves inside it are smaller.

Official warnings for rough seas off this coast came often in the monsoon. There were red warnings on 25 May 2025, 13 July 2025 and 30 July 2026. More warnings followed in August and September 2026, with waves of 2 to 3 metres.

Which months suit you?

• Swimmers and families with young children: December to March, when the sea is calmest (early December can still be rough). Stay close to children in the water.
• First surf lessons: December to March, when the waves on the sand are small and clean. Calm days in late October, November and April can work too. See your first surf lesson.
• Strong surfers: August to November (sometimes into December), and good days in April. From May to September the waves are bigger, but the wind from the sea often makes them messy. See surfing at Hiriketiya.
• A quiet stay: May to October, if you don’t mind showers, a rough sea and quiet evenings. In 2026, dengue (a fever spread by mosquitoes) was highest in June and July.
• People who find heat hard: try to avoid March and April.

How much does it rain?

There is no official weather station at the bay. The two nearest are at Galle, about 55 km west, and Hambantota, about 50 km east. From 1991 to 2020, Galle got an average of 2,348 mm of rain a year, and Hambantota only 1,042 mm. Hiriketiya lies between them, so it is probably drier than Galle.

Rain falls in every month. The driest stretch is usually January to March. April and May bring storms. From June to September it is windy, with showers, but much less rain falls here than at Galle. October and November usually bring the most rain. Even then, about half or more of the rainy days bring only light rain or a short shower.

One visitor’s report from August 2026 fits this picture: it was raining around Galle and Mirissa while Hiriketiya was sunny.

In October and November, watch the weather news for storms. Cyclone Ditwah, in late November 2025, hit the hill country hardest.

Heat and the strong sun

It is warm all year. In model data for the bay, days reach about 29 to 31 °C, and nights fall to about 23 to 25 °C. The damp air makes afternoons feel like 33 to 37 °C.

March and April are the hottest months. At Galle, nearly every day in those months reaches 30 °C. In March and April 2026, the Department of Meteorology gave heat warnings for parts of the Southern Province. It said the heat index (how hot it feels) was at its “Caution” level: 39 to 45 °C. Its advice:

• keep out of direct sun from 10 am to 3 pm;
• wear a hat, sunglasses and light, loose clothes;
• drink water even when you are not thirsty.

The sun is very strong all year. Two computer models, not official readings, put the UV index at “high” or “very high” on nearly every day. One of them reaches “extreme” (11 or more) on about 8 days in 10 in March and April. At 8 or more, the World Health Organization says to avoid the midday sun and always wear a shirt, sunscreen and a hat. Here the strongest sun is from about 10 am to 2 pm.

The sea is warm all year too. In the models, it is about 27 °C in July, the coolest month, and about 30 °C in April, the warmest.

Crowds, prices and what stays open

Most visitors come to Sri Lanka from December to February. There is a smaller rise in July and August, and the fewest come in May and June (official arrival counts for 2025).

The bay is at its fullest at Christmas and New Year. A 2026 travel guide calls December to March the busiest and most expensive time. It suggests avoiding Christmas and New Year because of the crowds. If you come then, book your room early. See where to stay.

From May to October most places stay open, but some close early or take a break, and evenings are quiet. A visitor in June 2025 found nothing to eat after 9 or 10 pm. Ask your guesthouse what is open.

Sri Lankan families travel in the school holidays, mainly in April, August and December. In 2026 schools closed for the August holidays on 7 August and opened again on 7 September. The last term ends on 4 December.

Poya days and holidays, 2026 to 2027

Every full moon is a Poya day, a Buddhist holiday. It is a public holiday, so banks close. No alcohol is sold, and many bars close or serve none. Drinking in public on a religious holiday can upset people.

The Poya days:

• 2026: 25 October, 24 November and 23 December.
• 2027: 22 January, 20 February, 22 March, 20 April, 19 May (Vesak), 18 June, 18 July, 16 August, 15 September, 15 October, 13 November and 13 December.

Other dates to know:

• Sinhala and Tamil New Year, 13 and 14 April 2027. Many people travel home. In 2026, extra buses and trains ran for the rush before and after, and few ran on New Year’s Day itself.
• Vesak, 19 and 20 May 2027. Towns hang lanterns, and people hand out free food and drinks at stalls called dansal. Liquor shops, meat shops and nightclubs usually close for two or three days.
• Christmas, 25 December. It falls in the busiest weeks at the bay.

Wildlife and nature by month

• Whales: the boats sail from Mirissa, about an hour west. Sri Lanka Tourism gives the season as November to April, with whales passing from December to April. Sightings are never certain, and boats must follow Sri Lanka’s rules for watching sea mammals.
• Turtles: sea turtles nest on the beach at Rekawa, about 50 minutes east, all year. Most come from April to July, when the village turtle project says you may see 5 to 15 in a night. From October to January it is often only 1 or 2. See Rekawa turtle watch.
• The blowhole: the spout of sea water at Hummanaya, about 13 minutes away, is biggest when the sea is rough. That is most often from May to September. From December to March it can be small. See Hummanaya blowhole.