Climate and monthly weather forecastMoratuwa, Sri Lanka
Climate and monthly weather forecast
The climate of Moratuwa
Moratuwa, Sri Lanka, is characterized by a Tropical rainforest climate, also marked as Af by the Köppen climate classification. Positioned near the equator, the city experiences warm weather and high humidity throughout the year. There's a significant amount of rainfall during the year, even in the driest months.The average high temperature fluctuates between 28.6°C (83.5°F) in August and 31.3°C (88.3°F) in March and April, indicating relatively steady warm conditions throughout the year. A similar pattern is followed by average low temperatures, only they range from 23.4°C (74.1°F) in January to 26.3°C (79.3°F) in May. Humidity remains on the higher side annually, with the least in January and February at 75% and peaks at 83%, from June through August.
Moratuwa is drenched with rains every month, from a low 25mm (0.98") in January to a staggering 350mm (13.78") in June. The number of rainfall days follows a similar pattern, with a maximum of 29.5 days in July and August and a minimum of 8.9 days in January. Sea temperatures remain above 27°C (80.6°F), ensuring perfect beach holidays throughout the year.
Cloud cover varies with an average percentage lying between 24% in January to 55% in June. Wind speeds are normally highest in June and July, reaching up to 15.9km/h (9.9mph) and have the lowest speeds in March at 7.9km/h (4.9mph). The UV Index hovers around 7 for most of the year, cautioning visitors of the potential for skin harm from the sun.
The best time to visit Moratuwa
Considering all the climate factors, the period from December through April is arguably the best time to visit Moratuwa. This span sees the least amount of rainfall, between 25mm (0.98") to 127mm (5"). Moreover, the average high temperature lies within the range of 29.7°C (85.5°F) to 31.3°C (88.3°F), which is warm but not intolerably hot. Relative humidity during these months hovers around 75% to 78%, which is more comfortable than the humid conditions experienced during monsoons. The wind speeds are also relatively low during this period, making outdoor activities more enjoyable.The worst time to visit Moratuwa
The monsoon season, specifically from May to November, can be considered the worst time to visit Moratuwa. Rainfall reaches its peak in June with up to 350mm (13.78") of rain, and the number of rainfall days maximizes to 29.5 in July and August. The humidity is extremely high, reaching 83% between June and August. The high temperature holds steady around 30°C (86°F), and when combined with high humidity, it results in a rather uncomfortable climate.Spring weather in Moratuwa
In Moratuwa, spring lasts from March to May and experiences gradually increasing rainfall, from 61mm (2.4") in March to 303mm (11.93") in May. Average high temperatures are relatively stable, moving from 31.3°C (88.3°F) in March and April to 30.2°C (86.4°F) in May. The average low temperature follows a similar trend, increasing from 25°C (77°F) in March to 26.3°C (79.3°F) in May. The UV index is considerable during these months, with a value of 7 in March and April and dropping to 6 in May. Visitors during this season could experience both sun-drenched and rain-soaked days.Summer weather in Moratuwa
Summer, which runs from June to August in Moratuwa, receives the heaviest rainfall. June sees the heaviest downpours with 350mm (13.78"), dropping slightly to 282mm (11.1") in August. The average high temperatures during these months range from 28.7°C (83.7°F) to 29.2°C (84.6°F), while the average low ranges from 25.5°C (77.9°F) to 26.1°C (79°F). A UV index of 6 to 7 in these months calls for caution against potential skin damage.Autumn weather in Moratuwa
Autumn in Moratuwa, from September to November, sees a downward trend in rainfall, dropping from 201mm (7.91") in September to 133mm (5.24") in November. The average high temperature ranges from 28.8°C (83.8°F) to 29.8°C (85.6°F) with commensurate lows ranging from 24.8°C (76.6°F) to 25.5°C (77.9°F). A consistent UV Index of 7 indicates considerable levels of UV radiation exposure.Winter weather in Moratuwa
Winter, from December to February, is characterized by the least amount rainfall, ranging from 93mm (3.66") in December to 32mm (1.26") in February. Average high temperatures hover around 30°C (86°F), with the low temperatures ranging from 23.4°C (74.1°F) to 23.5°C (74.3°F). A UV index of 7 cautions against potential skin damage, while lower humidity levels provide a pleasant respite from the oppressively humid summer months.Weather in January
Starting the year, Moratuwa, Sri Lanka experiences predominantly warm and humid conditions with occasional bouts of rainfall. While the city enjoys a fair amount of sunshine, a considerable cloud cover intermittently overshadows the skies. Weather in January »Weather in February
As the month progresses, the weather in Moratuwa leans towards drier conditions with slight variations in humidity. Coastal temperatures remain almost unaltered making outdoor activities possible and inviting. The Uv index and visibility remain constant, suggesting that February does not bring any major inflections in weather attributes. Weather in February »Weather in March
Following February, March weather exhibits a notable change in the atmospheric conditions of Moratuwa. The sea temprature rises to 29.1°C (84.4°F), inviting for water-based activities. With the onset of pre-monsoon showers, the rainfall spikes to 61mm (2.4"), leading to more humid conditions. Weather in March »Weather in April
April brings a more humid climate with increased cloud cover and reduced wind speeds. Despite this, Moratuwa remains pleasantly warm with its air and sea temperatures sustaining their levels. The UV index and visibility in April remain constant, implying that weather influences are not significantly diverging. Weather in April »Weather in May
May in Moratuwa marks the onset of the monsoon season, with the environment turning increasingly wet and humid. Conditions remain conducive to flora, lending a verdant look to the city. May's weather, although humid, continues to offer a good amount of daylight and consistent visibility. Weather in May »Weather in June
June continues the monsoon trend from May, resulting in a persistent wet and humid climate. The city maintains a good amount of daylight, although cloud cover increases, shading the cityscape. Despite the relatively high humidity, sea temperatures plunge to 28.2°C (82.8°F), bringing a refreshing change for coastal activities. Weather in June »Weather in July
Moving into July, the monsoonal conditions in Moratuwa slightly subside, yet the atmosphere remains largely damp. The sea temperature drops further, providing a refreshing counterpoint to the warm air temperature. WDespite the overcast conditions, daylight hours and visibility exhibit little change. Weather in July »Weather in August
August brings a marginal shift towards drier conditions in Moratuwa, but the overall monsoon climate sustains. The weather continues to offer ample daylight hours and consistent visibility, ideal for outdoor exploration. The sea temperature shows no noticeable variances, remaining refreshingly cool. Weather in August »Weather in September
As September rolls around in Moratuwa, the city experiences a transitional phase from monsoon to post-monsoon. The humidity levels and sea temperatures marginally decrease and return to their pre-monsoon levels. Regardless of the receding monsoon, the city continues to experience ample daylight and sustained visibility. Weather in September »Weather in October
In October, the city of Moratuwa experiences more pronounced post-monsoon characteristics. Despite the considerable cloud cover, daylight hours remain almost constant. The sea temperature picks up from September to October, providing conducive conditions for water-based activities. Weather in October »Weather in November
As November approaches, Moratuwa perceives a pronounced shift towards drier and cooler conditions. Humidity and sea temperatures moderately decrease, making the weather conducive for outdoor activities. The reduced rainfall and cloud cover invite more hours of sunshine, making the cityscape brighter. Weather in November »Weather in December
Rounding off the year, December brings a significant change in the weather of Moratuwa. It marks the dawn of the dry season, with less rainfall and reduced humidity levels. The sea temperature decreases further, inviting for various maritime activities. Weather in December »Updated: Feb 6, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The months with the lowest humidity in Moratuwa are January and February, with an average relative humidity of 75%.
The month with the least rainfall is January, when the rain falls for 8.9 days and typically collects 25mm (0.98") of precipitation.
Throughout the year, in Moratuwa, there are 273.8 rainfall days, and 2059mm (81.06") of precipitation is accumulated.
With an average of 9.2h of sunshine, January has the most sunshine of the year in Moratuwa, Sri Lanka.
January through April, July, September through December, with an average maximum UV index of 7, are months with the highest UV index.
Warmest months in Moratuwa, Sri Lanka, are March and April, with an average high-temperature of 31.3°C (88.3°F).
April is the month with the warmest seawater in Moratuwa, Sri Lanka, with an average sea temperature of 29.6°C (85.3°F).
May, June and August, with an average maximum UV index of 6, are months with the lowest UV index.
The months with the highest humidity are June through August, with an average relative humidity of 83%.
June is the month with the most rainfall. Rain falls for 29.2 days and accumulates 350mm (13.78") of precipitation.
June has the longest days of the year in Moratuwa, Sri Lanka, with an average of 12h and 30min of daylight.
In Moratuwa, August is known for its average lowest temperatures, reaching a high of 28.6°C (83.5°F) and a low of 25.5°C (77.9°F).
August is the month with the coldest seawater, with an average sea temperature of 27.2°C (81°F).
With an average of 6.8h of sunshine, November has the least sunshine of the year.
With an average of 11h and 42min of daylight, December has the shortest days of the year in Moratuwa, Sri Lanka.
Moratuwa does not utilize Daylight Saving Time (DST). +0530 timezone is used throughout the entire year.
Average temperature
Moratuwa, Sri Lanka
The warmest months (with the highest average high temperature) are March and April (31.3°C).
The month with the lowest average high temperature is August (28.6°C).
The month with the highest average low temperature is May (26.3°C).
The coldest month (with the lowest average low temperature) is January (23.4°C).
Average pressure
Moratuwa, Sri Lanka
- Average pressure in January:
1011.6mbar - Average pressure in February:
1011.3mbar - Average pressure in March:
1010.7mbar - Average pressure in April:
1009.7mbar - Average pressure in May:
1008.7mbar - Average pressure in June:
1008.8mbar
- Average pressure in July:
1008.9mbar - Average pressure in August:
1009.2mbar - Average pressure in September:
1009.9mbar - Average pressure in October:
1010mbar - Average pressure in November:
1009.9mbar - Average pressure in December:
1010.4mbar
The month with the highest atmospheric pressure is January (1011.6mbar).
The month with the lowest atmospheric pressure is May (1008.7mbar).
Average wind speed
Moratuwa, Sri Lanka
- Average wind speed in January:
12.2km/h - Average wind speed in February:
9.4km/h - Average wind speed in March:
7.9km/h - Average wind speed in April:
8.7km/h - Average wind speed in May:
13.3km/h - Average wind speed in June:
15.9km/h
- Average wind speed in July:
14.9km/h - Average wind speed in August:
15.1km/h - Average wind speed in September:
13.6km/h - Average wind speed in October:
10.6km/h - Average wind speed in November:
9.1km/h - Average wind speed in December:
11.3km/h
The windiest month (with the highest average wind speed) is June (15.9km/h).
The calmest month (with the lowest average wind speed) is March (7.9km/h).
Average humidity
Moratuwa, Sri Lanka
The months with the highest relative humidity are June, July and August (83%).
The months with the lowest relative humidity are January and February (75%).
Average rainfall
Moratuwa, Sri Lanka
- Average rainfall in January:
25mm - Average rainfall in February:
32mm - Average rainfall in March:
61mm - Average rainfall in April:
127mm - Average rainfall in May:
303mm - Average rainfall in June:
350mm
- Average rainfall in July:
260mm - Average rainfall in August:
282mm - Average rainfall in September:
201mm - Average rainfall in October:
192mm - Average rainfall in November:
133mm - Average rainfall in December:
93mm
The wettest month (with the highest rainfall) is June (350mm).
The driest month (with the least rainfall) is January (25mm).
Average rainfall days
Moratuwa, Sri Lanka
- Average rainfall days in January:
8.9 days - Average rainfall days in February:
11.5 days - Average rainfall days in March:
19.9 days - Average rainfall days in April:
25.8 days - Average rainfall days in May:
28 days - Average rainfall days in June:
29.2 days
- Average rainfall days in July:
29.5 days - Average rainfall days in August:
29.5 days - Average rainfall days in September:
26.3 days - Average rainfall days in October:
25.2 days - Average rainfall days in November:
23.5 days - Average rainfall days in December:
16.5 days
The months with the highest number of rainy days are July and August (29.5 days).
The month with the least rainy days is January (8.9 days).
Average sea temperature
Moratuwa, Sri Lanka
The best month for swimming (with the highest average sea temperature) is April (29.6°C).
The coldest month (with the lowest average sea temperature) is August (27.2°C).
Average daylight / Average sunshine
Moratuwa, Sri Lanka
- Average daylight in January:
11h and 48min - Average daylight in February:
11h and 54min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 18min - Average daylight in May:
12h and 24min - Average daylight in June:
12h and 30min
- Average daylight in July:
12h and 30min - Average daylight in August:
12h and 18min - Average daylight in September:
12h and 12min - Average daylight in October:
12h and 0min - Average daylight in November:
11h and 48min - Average daylight in December:
11h and 42min
The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in January:
9h and 12min - Average sunshine in February:
9h and 0min - Average sunshine in March:
9h and 0min - Average sunshine in April:
9h and 0min - Average sunshine in May:
8h and 42min - Average sunshine in June:
8h and 12min
- Average sunshine in July:
7h and 48min - Average sunshine in August:
7h and 12min - Average sunshine in September:
7h and 36min - Average sunshine in October:
7h and 54min - Average sunshine in November:
6h and 48min - Average sunshine in December:
7h and 6min
The month with the most sunshine is January (Average sunshine: 9h and 12min).
The month with the least sunshine is November (Average sunshine: 6h and 48min).
Average sunshine days
Moratuwa, Sri Lanka
- Average sunshine days in January:
21 days - Average sunshine days in February:
13.8 days - Average sunshine days in March:
7.4 days - Average sunshine days in April:
2.3 days - Average sunshine days in May:
1.2 days - Average sunshine days in June:
0.3 days
- Average sunshine days in July:
0.3 days - Average sunshine days in August:
0.5 days - Average sunshine days in September:
1.4 days - Average sunshine days in October:
3.4 days - Average sunshine days in November:
5.8 days - Average sunshine days in December:
12.5 days
The month with the most sunshine days is January (21 days).
The months with the least sunshine days are June and July (0.3 days).
Average UV index
Moratuwa, Sri Lanka
The months with the highest UV index are January, February, March, April, July, September, October, November and December (UV index 7).
The months with the lowest UV index are May, June and August (UV index 6).
Average cloud cover
Moratuwa, Sri Lanka
The month with the most cloud cover is June (Cloud cover 55).
The month with the least cloud cover is January (Cloud cover 24).
Average visibility
Moratuwa, Sri Lanka
The months with the highest visibility are January, February, March, April, November and December (10km).
The months with the lowest visibility are May, June, July, August, September and October (9km).
