worldweather

Weather in Negombo - 14-day forecast

Detailed weather forecast for Negombo, Sri Lanka: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Negombo
today🌧️ 29°💧 3 mm
Sun🌧️ 29°💧 5.2 mm
Mon🌧️ 29°💧 8.6 mm
Tue🌧️ 29°💧 7.5 mm
Wed🌧️ 28°💧 6.6 mm
Thu🌧️ 29°💧 12.1 mm
Fri🌧️ 28°💧 18.2 mm
Sat🌧️ 28°💧 24.2 mm
Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Tuesday 8 Sept in Negombo, the forecast high is 29°C. Typical daytime temperatures at this time of year range from 28°C to 29°C, so it will be warmer than usual. It is warmer than 75% of similar days.

29°Cnear normal
usually 27°C–29°C
night: exceptionally warm rain: typical rainfall wind: typical
29°Cnear normal
usually 27°C–29°C
night: exceptionally warm rain: more rain than usual wind: lighter than usual
29°Cwarmer than usual
usually 27°C–29°C
warmer than 74% of similar days
night: exceptionally warm rain: more rain than usual wind: lighter than usual
29°Cwarmer than usual
usually 28°C–29°C
warmer than 75% of similar days
night: exceptionally warm rain: more rain than usual wind: typical
28°Cnear normal
usually 28°C–29°C
night: exceptionally warm rain: more rain than usual wind: typical
29°Cnear normal
usually 28°C–29°C
night: exceptionally warm rain: exceptionally wet wind: typical
28°Cnear normal
usually 28°C–29°C
night: exceptionally warm rain: exceptionally wet wind: typical

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →
25°30°35° 1981: 27°C1982: 29°C1983: 27°C1984: 28°C1985: 28°C1986: 28°C1987: 30°C1988: 27°C1989: 28°C1990: 29°C1991: 29°C1992: 28°C1993: 29°C1994: 28°C1995: 29°C1996: 28°C1997: 29°C1998: 27°C1999: 29°C2000: 29°C2001: 30°C2002: 30°C2003: 28°C2004: 28°C2005: 28°C2006: 27°C2007: 28°C2008: 28°C2009: 28°C2010: 28°C2011: 28°C2012: 28°C2013: 27°C2014: 28°C2015: 28°C2016: 29°C2017: 28°C2018: 29°C2019: 29°C2020: 28°C2021: 28°C2022: 27°C2023: 28°C2024: 29°C2025: 29°C 2026 forecast: 29°C current forecast 29°C 198119902000201020202026
cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 28°C by day. The coolest year was 2013 (27°C) and the warmest was 2002 (30°C). The current forecast averages 29°C - higher than in 69% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Negombo

Negombo - 14-day weather forecast infographic

Negombo 30 & 45-day weather - long-range outlook

Next 16 days · forecast
28°
around 27° at night · days with rain: 16
Weeks 3-4 · avg for September
31°
around 26° at night · rain chance 56%
Weeks 5-7 · avg for October
31°
around 25° at night · rain chance 64%
The 30 & 45-day outlook for Negombo: the next 16 days are a numerical forecast updated daily - on average 28° by day and 27° at night. Further out we rely on multi-year climate averages: around 31° in September, and about 31° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Negombo

Saturday5 September 2026
🌧️29°light rain
sunrise 06:03 · sunset 18:16 · night 27° · evening 28° · rain 2.95 mm · humidity 77% · wind 6 m/s · clouds 54%
Sunday6 September 2026
🌧️29°light rain
sunrise 06:02 · sunset 18:16 · night 27° · evening 28° · rain 5.23 mm · humidity 76% · wind 6 m/s · clouds 100%
Monday7 September 2026
🌧️29°moderate rain
sunrise 06:02 · sunset 18:15 · night 27° · evening 28° · rain 8.64 mm · humidity 75% · wind 6 m/s · clouds 86%
Tuesday8 September 2026
🌧️29°light rain
sunrise 06:02 · sunset 18:15 · night 27° · evening 28° · rain 7.53 mm · humidity 76% · wind 6 m/s · clouds 77%
Wednesday9 September 2026
🌧️28°light rain
sunrise 06:02 · sunset 18:14 · night 27° · evening 28° · rain 6.57 mm · humidity 77% · wind 6 m/s · clouds 75%
Thursday10 September 2026
🌧️29°light rain
sunrise 06:02 · sunset 18:14 · night 27° · evening 28° · rain 12.12 mm · humidity 77% · wind 6 m/s · clouds 99%
Friday11 September 2026
🌧️28°moderate rain
sunrise 06:02 · sunset 18:13 · night 27° · evening 27° · rain 18.15 mm · humidity 79% · wind 7 m/s · clouds 97%
Saturday12 September 2026
🌧️28°moderate rain
sunrise 06:02 · sunset 18:12 · night 27° · evening 27° · rain 24.24 mm · humidity 74% · wind 7 m/s · clouds 100%
Sunday13 September 2026
🌧️28°light rain
sunrise 06:01 · sunset 18:12 · night 27° · evening 27° · rain 11.55 mm · humidity 80% · wind 7 m/s · clouds 100%
Monday14 September 2026
🌧️27°light rain
sunrise 06:01 · sunset 18:11 · night 27° · evening 27° · rain 18.57 mm · humidity 82% · wind 9 m/s · clouds 99%
Tuesday15 September 2026
🌧️28°light rain
sunrise 06:01 · sunset 18:11 · night 27° · evening 27° · rain 7.89 mm · humidity 77% · wind 9 m/s · clouds 87%
Wednesday16 September 2026
🌧️28°light rain
sunrise 06:01 · sunset 18:10 · night 27° · evening 27° · rain 9.15 mm · humidity 82% · wind 9 m/s · clouds 90%
Thursday17 September 2026
🌧️28°moderate rain
sunrise 06:01 · sunset 18:10 · night 27° · evening 27° · rain 13.2 mm · humidity 79% · wind 9 m/s · clouds 91%
Friday18 September 2026
🌧️28°moderate rain
sunrise 06:01 · sunset 18:09 · night 27° · evening 27° · rain 24.03 mm · humidity 81% · wind 8 m/s · clouds 61%
Saturday19 September 2026
🌧️29°light rain
sunrise 06:00 · sunset 18:09 · night 27° · evening 27° · rain 11.31 mm · humidity 77% · wind 7 m/s · clouds 100%
Sunday20 September 2026
🌧️29°moderate rain
sunrise 06:00 · sunset 18:08 · night 27° · evening 28° · rain 8.31 mm · humidity 77% · wind 6 m/s · clouds 91%

UV index in Negombo - is it safe to sunbathe?

UV INDEX · 16-DAY FORECASTNegombo03681111+9.1UV VERY HIGHtoday, daily maxSPF 50, long sleeves and shade between 10:00 and16:00.Unprotected fair skin may burn in about 20 min9Sat5.099Sun6.099Mon7.099Tue8.099Wed9.099Thu10.099Fri11.099Sat12.098Sun13.099Mon14.099Tue15.098Wed16.099Thu17.098Fri18.099Sat19.098Sun20.090-2 low3-5 moderate6-7 high8-10 very high11+ extremeworld-prices.com · 2026-09-05
Today the UV index in Negombo is 9 (very high) - unprotected fair skin can burn in about 20 minutes. SPF 50, long sleeves and shade between 10:00 and 16:00.

Sea temperature - Negombo

Water today
30°C
Week avg
30°C
Waves today
1.3 m
How's the water?
very warm
16-day sea temperature forecast:
5.09 30°C6.09 30°C7.09 30°C8.09 30°C9.09 30°C10.09 30°C11.09 30°C12.09 30°C13.09 30°C
Average sea temperature through the year:
Jan 28°CFeb 29°CMar 31°CApr 31°CMay 31°CJun 30°CJul 29°CAug 29°CSep 29°COct 29°CNov 30°CDec 29°C
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Air quality and smog in Negombo

Air quality in Negombo is currently very good. Fine particulate PM2.5: 8.5 µg/m³, PM10: 10.9 µg/m³.
CityPM2.5 (µg/m³)PM10 (µg/m³)Air quality
Negombo8.510.9very good
Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 06:30).

Negombo weather through the year

Negombo - annual climate

Warmest, driest months on average: January, February, December.

Upcoming public holidays in Sri Lanka: Binara Full Moon Poya Day — 26 September · Vap Full Moon Poya Day — 25 October · Deepavali — 8 November. Full calendar and travel notes

Nearby and related places

ColomboSri Jayawardenepura KotteKandyMataraTrincomaleeAnuradhapuraJaffna

FAQ - Negombo weather

What is the weather like in Negombo today?
Today it is about 29° during the day and 27° at night, light rain.
How far ahead can I check the forecast for Negombo?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.