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High Rainfall Forecast Issued for Negombo

October 21, 2026 · wweather1 editorial · 1 min read

An automatic weather alert has been issued for Negombo as forecasted precipitation levels cross established thresholds. Rainfall is expected to reach 43.1 millimeters.

According to forecast data from wweather1.com, high levels of precipitation are projected for the city of Negombo. The forecasted value of 43.1 millimeters exceeds the established warning threshold of 30 millimeters.

The weather event is associated with high severity rain conditions. The alert was automatically generated based on the latest available forecast metrics for the area.

Residents and local authorities in Negombo are advised to take note of the forecasted rainfall amounts. Weather monitoring will continue as conditions develop.

Why it is dangerous and what to do

⚠️ Safety
• Monitor local weather updates and alerts.
• Ensure proper drainage around residential properties.
• Exercise caution while traveling on wet roads.
📊 The numbers, from wweather1 data
Negombo: now +24°, Drizzle.
That is 1° below the October climate norm.
The record for this date is +31° (2009).
Three-day forecast: 22 October: +28°/+25° · 23 October: +28°/+24° · 24 October: +28°/+24°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates.

🌍 Weather in nearby cities

📰 Data source: wweather1. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.

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