Quick answer
Negombo is hot all year, with daytime highs of about 30 to 32 °C. It is driest and calmest roughly from December to March, when the beach is swimmable and sunsets are clear. From about late May to September the southwest monsoon brings showers and rough seas, and April and October to November bring heavy afternoon storms. Negombo receives a little less rain than Colombo but follows the same seasons. The lagoon is usable most of the year.
Key takeaways
- Negombo is driest and calmest roughly from December to March.
- The southwest monsoon brings showers and rough seas from roughly late May to September.
- April and October to November bring afternoon thunderstorms.
- Negombo receives slightly less rain than Colombo but follows the same seasons.
- The lagoon, fish market and canal trips work in most months, even when the sea is rough.
Negombo's climate in brief
Negombo lies about 35 km north of Colombo, on a strip of land between the sea and a large lagoon. It sits in the wet zone, but at its northern edge, so its rainfall is a little lower than Colombo's. Temperatures are the same: 30 to 32 °C by day and 24 to 26 °C at night, with high humidity.
Its seasons follow the west coast. December to March is dry and calm, April is stormy, late May to September is the southwest monsoon, and October to November is the wettest period.
The sea off Negombo is roughly 27 to 29 °C all year. The lagoon behind the town is shallow and sheltered, and it is less affected by the monsoon swell than the open beach. That makes Negombo more flexible in the wet months than beach towns further south that depend on the sea.
December to March
From about December to March, Negombo is mostly dry and sunny, with January and February the driest months. The sea is calm, the beach is good for swimming near the hotels, and the sun sets over the sea on most evenings.
This is also the main fishing season on the open sea, and the morning fish auction at the beach and the lagoon market are busy. Outrigger canoes, called oruwa, go out early.
Temperatures in the dry season are about 30 to 31 °C by day and 23 to 24 °C at night, with lower humidity than later in the year. Evenings on the beach are pleasant, and the walk along Lewis Place and the beach road is comfortable after about 4 pm.
- →Driest: January and February.
- →Calm sea: roughly December to April.
- →Clear sunsets most evenings.
Late May to September
The southwest monsoon arrives in the second half of May. The sea becomes rough, with swell and currents, and swimming in the open sea is not safe on most days. Showers come and go, with long bright spells in July and August.
The lagoon is more sheltered, and boat trips through the mangroves and the Dutch canal still run in most weather. Hotel pools take over from the beach.
- →Sea: rough, red flags common.
- →Lagoon trips: usually running.
- →July and August: lighter showers.
April, October and November
April is hot and humid, with afternoon thunderstorms. October and November are the wettest months, with heavy storms usually in the afternoon or evening and dry mornings. Short-lived flooding on low roads is possible.
Arriving flights land through storms without trouble, but road transfers can be slowed by flooded junctions. Allow extra time for the airport in the wettest months.
The storms in these months follow a daily pattern: clear mornings, building cloud after noon and heavy rain in the late afternoon or evening. A morning boat trip on the lagoon or a visit to the fish market is usually dry, and the afternoon is best spent indoors or by the pool.
Arrival and departure days
Many visitors spend only one night in Negombo, after a late arrival or before an early flight. The weather matters less on those nights, because the hotel is the main attraction. A dry season evening on the beach is a pleasant start; a monsoon evening by the pool works too.
Lankan Stays & Trails books Negombo for arrival and departure nights in every season and plans beach time there from December to April.
- →Driest arrival months: January and February.
- →Wettest: October and November.
- →Airport: about 20 to 30 minutes away.
Frequently asked questions
What is the best time to visit Negombo?
For the beach, roughly December to March, when Negombo is dry, sunny and calm, with January and February the driest months. As a first or last night near the airport, Negombo works in every month, because the hotel and lagoon matter more than the sea.
When is the rainy season in Negombo?
The main rainy season is the southwest monsoon, from roughly late May to September. October and November bring heavy afternoon storms and are often the wettest months. April has thunderstorms too. Negombo receives a little less rain than Colombo.
Can you swim in Negombo?
From about December to April, yes, near the hotels and on days without red flags. From late May to September, the southwest monsoon makes the sea rough with strong currents, so swimming is not safe on most days. Hotel pools are the alternative.
What is the weather like in Negombo in June?
June is in the southwest monsoon, with showers, gusty wind and rough seas. Long sunny spells are common between showers. The beach is not suitable for swimming, but the lagoon, fish market and canal trips usually continue.
Is Negombo good for a night before a flight?
Yes, in every season. Negombo is about 20 to 30 minutes from the airport and has hotels for every budget. In the wettest months, October and November and late May, allow extra time for the transfer in case of flooded roads.
Is Negombo wetter than Colombo?
No, slightly drier. Negombo sits at the northern edge of the wet zone and receives a little less rain on average than Colombo, but it follows the same seasonal pattern.
How does Lankan Stays & Trails use Negombo?
Negombo is used for arrival and departure nights in every season, with beach time planned from December to April. In the monsoon months, lagoon and canal trips and hotel pools replace the beach, and transfers are timed with margin.
What is the weather like in Negombo in January?
January is one of the driest months in Negombo, with sunny days of about 30 to 31 °C, lower humidity and a calm sea that is good for swimming near the hotels. Sunsets over the sea are clear on most evenings, and the fish market and lagoon trips are busy.