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Live forecasts update automatically; written guidance last reviewed 14 June 2026 by the StoryShift weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Sri Lanka’s tropical climate means warm weather year-round, but the best time to visit Colombo is during the dry northeast monsoon from December to March, when the live forecast above typically shows sunny skies and lighter winds.
What does the live forecast show for Colombo today?
The live conditions above give you the current temperature, humidity and wind for Colombo, as well as the outlook for the next few hours. Travellers arriving today can expect a warm, humid atmosphere typical of the coast. For a longer view, the 10-day forecast will help you plan your first week in Sri Lanka.
Sri Lanka weather by month: a seasonal guide
Colombo’s weather is shaped by two monsoon seasons. The southwest monsoon (May–September) brings heavy rain to the west coast, while the northeast monsoon (December–February) delivers drier and sunnier conditions. Here is what to expect month by month.
January and February
These are among the best months for a visit. The northeast monsoon brings clear skies, low humidity and sea temperatures around 28°C. Average daily highs in Colombo reach 31°C, with very little rain. It is the peak tourist season, so book accommodation early.
March and April
March still belongs to the dry season, with similarly high temperatures and sea temperatures rising to 30°C. April marks the transition to the southwest monsoon: humidity increases and afternoon showers become more frequent, though mornings often stay sunny.
May to August
The southwest monsoon dominates. May, June and July are the wettest months in Colombo, with frequent heavy downpours and high humidity. August sees a slight reduction in rainfall, but still expects cloudy skies and short, intense showers. Sea temperatures remain around 27–29°C. If you are planning Sri Lanka in August or Sri Lanka in July, pack a waterproof jacket and expect rain most days.
September and October
September is the tail end of the southwest monsoon; rain eases gradually. October is a particularly tricky month: the inter-monsoonal period brings unpredictable weather, with possible thunderstorms and squalls. For travellers considering Sri Lanka in October, be prepared for sudden changes and check the live forecast above daily.
November and December
November sees the northeast monsoon begin, with frequent but shorter showers. By December the rain reduces significantly and Colombo enjoys long sunny spells. Sea temperatures are still warm at 28°C, making December an excellent month for beach holidays. For those asking about weather in Sri Lanka in December or Sri Lanka weather December, the answer is generally fine and dry conditions on the west coast.
When is the best time to visit Sri Lanka?
The ideal period for a holiday in Colombo is December to March, when the northeast monsoon delivers the most sunshine and least rain. April and November can be considered shoulder months – good for lower prices but with a higher chance of showers. May to October is the wet season on the west coast, though the east coast (Trincomalee, Arugam Bay) enjoys its dry season during these months. For a full overview of weather across the UK, you can visit our main weather hub, though conditions there are very different from Sri Lanka’s tropics.
What to pack for Sri Lanka based on the season
Lightweight, breathable clothing is essential all year. For the dry season (December–March), pack sun protection, a hat and swimwear. For the wet season (May–October), add a waterproof jacket, quick-dry trousers and sandals that can handle puddles. Mosquito repellent is advisable in any month, especially after rain. If you plan to visit the hill country, bring a light fleece for cooler evenings.
Sri Lanka weather warnings and safety
During the monsoon seasons, the UK weather warnings system does not cover Sri Lanka, but local authorities issue alerts for heavy rain and flash flooding, particularly in Colombo and the western slopes. Always check the live forecast above and local news before heading out during the wet season. The live conditions above will flag any extreme weather affecting the capital.
How hot is Sri Lanka in January?
January is one of the coolest months in Colombo, with average highs of 31°C and low humidity. Sea temperatures are a pleasant 28°C. It is hot enough for swimming and sightseeing, but the northeast breeze keeps it comfortable.
How hot is Sri Lanka in March?
March sees temperatures reaching 32°C in Colombo, with humidity beginning to rise. Sea temperature climbs to 29°C. It is still very warm but the dry conditions make it a favourite month for travellers.
How hot is Sri Lanka in July?
July in Colombo has average highs of 30°C, but the southwest monsoon brings high humidity and frequent rain. Feels like temperatures can exceed 35°C because of the moisture in the air.
How hot is Sri Lanka in October?
October is hot and humid, with daily highs around 31°C. Sea temperature is 28°C. The inter-monsoonal weather can make it feel muggy, and sudden thunderstorms are common.
How hot is Sri Lanka in December?
December offers highs of 30°C with lower humidity than the wet season. Sea temperature stays warm at 28°C. It is a very pleasant time for beach holidays and city exploration.
For comparison with other popular holiday destinations, you might also find our guides to Marrakech weather, Dubai weather or Madeira weather useful when deciding where to travel next.