November in Negombo averages a daily high of 30.7°C with nights around 24.3°C. Expect roughly 18.8 wet days totalling 361.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Negombo is January–February.
Based on COLOMBO, CE (34.5km), 1995–2024. 13 years of November data.