Trying to makes sense of the likely weather conditions in Sri Lanka during your visit isn’t as straightforward as you may think. We have created this easy to understand synopsis of weather patterns in Southern Sri Lanka using historical data and rainfall charts from the Department of Meteorology in Sri Lanka.
To ensure you have a great time and get the most out of your time here, please use this as a guide, but also note that Sri Lanka is a tropical country, especially the west of the Southern province, and that rainfall and extreme conditions are possible all year round.
A warm tropical climate all year round, with two inter-medial monsoons during the off-peak season
The Southern Province is characterised by warm, humid, tropical climatic conditions. The further East of Galle you travel, the less rainfall there is. Even 35km can make a big difference. Mirissa receives just over half the rain of Galle!
The country itself generally has four climatic seasons.
Average Humidity: 75-90%
Average Temperature: Day 28-34. Night 22-26.
Average Sea Temperature: 26-28 degrees
So When is Best to Visit?
The Peak Season
In the South, the main visitation period has historically been Dec-Mar when the seas and beach conditions are often at their prime and the rainfall levels are modest. This is obviously when prices for accommodation are at their peak, especially around the Christmas and New Year period.
Shoulder Months
April and Nov are often excellent times to visit as the beaches are less busy, prices are discounted and the beach conditions can be as good as the Peak Season, especially in April.
Monsoon Season
Despite this period (May-Oct) often being labelled “monsoon”, it can actually be a very good time to visit. Beaches are much quieter, accommodation prices are significantly discounted and the weather in July and August can actually be very pleasant. Yes, you will probably encounter some rain.
You can expect frequent rainfall in May / June and Sep / Oct / Nov, but these showers are usually passing and sunshine often follows.
Conclusion
Don’t be afraid of weather forecast saying showers. There is always a chance of rain in the South, but often it doesn’t materialise! After all, it is a tropical country and the rain makes it lush and green. Some rain can actually be a welcome relief from the heat. Pack an umbrella just in case!