Chilaw in Spring
In spring (March, April and May), Chilaw sees average daytime highs around 30°C and overnight lows near 26°C, with 441 mm of rain over about 67 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Across spring, daytime highs hold fairly steady around 30°C. The sky is clear or mostly clear about 25% of the time across spring, and the air most often feels miserable.
Spring is Chilaw's weakest season of the year to visit on our travel score. Chilaw has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Chilaw's year-round climate.
- Avg daytime high
- 30°C
- warmest season of the year
- Avg overnight low
- 26°C
- Rainfall
- 441 mm
- 67 wet days
- Avg wind
- 14 km/h
- Travel score
- 3.5
- weakest season of the year
- Months
- Mar · Apr · May
Temperature in Chilaw in Spring
Across spring, daytime highs hold fairly steady around 30°C.
A typical spring day in Chilaw reaches about 30°C and drops to 26°C overnight. The warmest of the three months is March, the coolest March.
How spring really feels in Chilaw
Once humidity and wind are folded in, spring brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in spring is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Chilaw weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 30° / 24° | 37 | 6.1 | 11.6 | 5.7 |
| Feb | 31° / 25° | 33 | 6 | 11.8 | 5.2 |
| Mar | 31° / 26° | 69 | 13.7 | 11.9 | 4.4 |
| Apr | 30° / 26° | 152 | 24.9 | 12.2 | 3.2 |
| May | 30° / 27° | 221 | 28.1 | 12.3 | 3.0 |
| Jun | 29° / 27° | 185 | 25.8 | 12.4 | 3.4 |
| Jul | 28° / 26° | 133 | 22.1 | 12.4 | 4.0 |
| Aug | 28° / 26° | 129 | 21.9 | 12.2 | 4.1 |
| Sep | 28° / 26° | 180 | 24.4 | 12 | 3.7 |
| Oct | 29° / 26° | 298 | 26.1 | 11.8 | 3.5 |
| Nov | 29° / 25° | 261 | 22.2 | 11.7 | 3.8 |
| Dec | 29° / 25° | 131 | 13.5 | 11.6 | 5.0 |
Cloud cover in Spring
The sky is clear or mostly clear about 25% of the time across spring.
Chance of precipitation in Spring
Chilaw gets around 441 mm of rain over 67 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 14 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 48 min in early March to 12 h 24 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.9 kWh/m².
Hazard calendar for Chilaw
In spring, Chilaw overlaps its cyclone season. The full year is below, with each hazard's peak months called out.
Chilaw sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Is spring a good time to visit Chilaw?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a weaker month for outdoor sightseeing in Chilaw.
What to pack for Chilaw in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Chilaw sees daytime highs around 30°C and nights near 26°C. Pack light clothes, rain gear and sun protection. About 67 days see rain.
Sea temperature near Chilaw in Spring
The nearest coast averages about 29°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 20 km away) is warmest in April at about 30°C and coldest in August near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 29 | 30 | 29 | 28 | 27 | 27 | 28 | 28 | 29 | 28 |
| Comfort | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Warm |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 29 | Tropical |
| Jun | 28 | Tropical |
| Jul | 27 | Warm |
| Aug | 27 | Warm |
| Sep | 28 | Warm |
| Oct | 28 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Tropical |
UV index in Chilaw in Spring
Clear-sky midday UV across spring averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Chilaw peaks around April 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 10 | 13 | 13 | 13 | 13 | 11 | 12 | 13 | 13 | 12 | 10 | 9 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 13 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 13 | Extreme |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 10 | Extreme |
| Dec | 9 | Very high |
Air quality in Chilaw in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in Chilaw is worst in March — around 30 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (August, 17 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 23 | 23 | 30 | 28 | 24 | 18 | 17 | 17 | 17 | 19 | 24 | 23 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 23 | Moderate |
| Feb | 23 | Moderate |
| Mar | 30 | Moderate |
| Apr | 28 | Moderate |
| May | 24 | Moderate |
| Jun | 18 | Moderate |
| Jul | 17 | Moderate |
| Aug | 17 | Moderate |
| Sep | 17 | Moderate |
| Oct | 19 | Moderate |
| Nov | 24 | Moderate |
| Dec | 23 | Moderate |
Where is Chilaw?
Chilaw sits at 7.6°N, 79.8°E, 8 m above sea level, in Sri Lanka. The nearest listed city is Negombo, 41 km away.
Topography around Chilaw
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Chilaw.
Within 3 km, the terrain around Chilaw has only modest variations in elevation — a maximum elevation change of 15 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 67 m; within 80 km, large variations in elevation — a maximum elevation change of 977 m.
The land around Chilaw is covered by water (38%) and trees (33%) within 3 km, water (52%) and trees (39%) within 16 km, and trees (53%) and water (37%) within 80 km.
Sri Lanka travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type D / G / M
- 230 V · 50 Hz
- Prices
- ≈ 27% of US
- price level, 2025
- GDP per capita
- $5,002
- 2025
- Happiness
- 4.0 / 10
- World Happiness, 2025
- Safe drinking water
- 47%
- of population, 2024
- Homicide rate
- 3.3
- per 100k, 2019
- Road deaths
- 19.7
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 486
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Chilaw (7.5758°, 79.7953°, elevation 8 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.