# SRI LANKA WEATHER FORECAST FOR 18 SEPTEMBER 2026

- Link: https://www.weather.lk/sri-lanka-weather-forecast-for-18-september-2026/
- Published: 2026-09-17T19:28:53+05:30
- Author: WeatherLK

Sri Lanka is expected to experience a generally showery weather pattern on 18 September,
with several areas receiving rain throughout the day. Showers will occur at times
in the Western and Sabaragamuwa provinces and in the Galle, Matara, Kandy and Nuwara-
Eliya districts.

Fairly heavy rainfall exceeding 50 mm is possible at some locations in the Galle,
Matara, Kalutara and Ratnapura districts. Residents and motorists in these areas
should remain alert to changing weather conditions. Several spells of showers are
also expected in the North-Western Province.

Meanwhile, showers or thundershowers are likely at several places in the Uva and
Eastern provinces and in the Mullaittivu and Polonnaruwa districts after 1.00 p.
m. Thundershowers may produce temporary localized strong winds and lightning, and
the public is advised to take adequate precautions to minimize possible damage.

![](https://meteo.gov.lk/gifs/analysis1.gif?t=1789653075224)

**Sea Areas Around Sri Lanka**

Rainfall activity is also expected over several coastal and offshore areas during
the next 24 hours. Showers or thundershowers will occur at times in the sea areas
extending from Negombo to Hambantota via Colombo and Galle. A few showers or thundershowers
may develop in other sea areas during the evening or night.

South-westerly winds are expected, with speeds of 25–35 kmph. Wind speeds may increase
up to 55–60 kmph at times in the sea areas from Hambantota to Pottuvil. Winds may
also reach up to 50 kmph from Galle to Hambantota and from Puttalam to Kankasanthurai
via Mannar.

Sea conditions will be rough at times from Hambantota to Pottuvil and fairly rough
from Galle to Hambantota and Puttalam to Kankasanthurai via Mannar. Temporarily 
strong gusty winds and very rough seas may occur during thundershowers.

![](https://meteo.gov.lk/gifs/marine1.gif?t=1789653131940)