Negombo sits in Sri Lanka’s southwestern wet zone, where the southwest monsoon from May through September brings the island’s heaviest rainfall, supplemented by a second wet spell during the October-to-December inter-monsoon period.
North of Colombo on a lagoon near the international airport, the city’s canal network is closely tied to the region’s monsoon rainfall. The catastrophic May 2017 floods and landslides, triggered by an intense burst of southwest monsoon rain, remain the reference event for how quickly this densely populated region can flood, and Sri Lanka’s Department of Meteorology relies heavily on radar to track incoming monsoon rain bands. Learn more: Flash Flood Warning Signs on Radar · Open the full Rain Map
Frequently Asked Questions
Is it raining in Negombo right now?
The map above shows recent radar observations over Negombo, Western Province where coverage is available. Use the map legend and timestamp to interpret the imagery. A blank map over Negombo can mean no detected precipitation, missing coverage, delayed data, or rain too light for radar to detect.
How often does the Negombo rain radar update?
Updates depend on the radar provider and local network. Check the timestamp on the map for the latest available frame, and press play to compare recent observations. Radar imagery can lag conditions on the ground.
Can I see if a storm is heading toward Negombo?
Press play to compare recent radar frames over Western Province and see the direction of detected rain. This can help you assess approaching showers near Negombo, but storms can grow or change direction; check your local weather service for forecasts and warnings.
Is this Negombo rain radar free to use?
Yes, completely free – no account, app download, or sign-up required. It works in any browser on desktop and mobile.