Climate and monthly weather forecastArugam Bay, Sri Lanka
Climate and monthly weather forecast
The climate of Arugam Bay
Arugam Bay, located in Sri Lanka, is dominated by the Af (Tropical rainforest) according to the Köppen climate classification. This climatic designation illustrates Arugam Bay as a region marked with high temperatures and substantial rainfall throughout the year. Geographically, it is positioned near the equator which significantly impacts its climate characteristics.The annual temperature in Arugam Bay maintains a narrow range between the warmest month of June with a high average of 33°C (91.4°F) and coldest month of January having a low average of 24°C (75.2°F). Arugam Bay appears to be enveloped in a blanket of warm air, regardless of the time of the year. The fairly uniform temperature is indicative of the tropical climatic conditions. Furthermore, humidity percentages fluctuate from a minimum of 68% in June to a maximum of 81% in December, painting a picture of a predominantly humid environment throughout the year.
Turning attention to rainfall, a descending trend can be detected from December's high average of 272mm (10.71") to June achieving a low average of 30mm (1.18"). This exhibits a prominent wet-dry seasonal variation with both extremes tending to cluster in individual halves of the year. The fluctuation in rainfall is accompanied by changes in the number of rainy days from 12.8 days in March to a peak of 25.5 days in November and December. This pattern further delineates the division of the year into distinct wet and dry periods.
The best time to visit Arugam Bay
Based on available climate data, the most favorable time to visit Arugam Bay would be from April to June. During these months, the weather is fairly stable with average high temperatures ranging from 31.8°C (89.2°F) to 33°C (91.4°F). Relatively low rainfall levels, particularly in June when the average drops to a mere 30mm (1.18"), contribute to an enjoyable outdoor experience. These conditions combined with an average of 11.8 hours of sunlight in June and a stable sea temperature averaging 29°C (84.2°F) make this period highly desirable for visitors, especially for those seeking to engage in water sports and sunbathing.The worst time to visit Arugam Bay
Conversely, the period from October to December is deemed to be the least appealing for visitors to Arugam Bay. This interval is characterized by high rainfall amounts coupled with the largest number of rainy days in the year. In November and December, the rainfall reaches its peak at an average 220mm (8.66") and 272mm (10.71") respectively, while the number of rainy days reaches a maximum of 25.5 days. Despite the relatively high temperatures (averaging around 29.3°C (84.7°F) in November and 28°C (82.4°F) in December), such conditions can considerably restrict outdoor activities.Spring weather in Arugam Bay
Spring dominates Arugam Bay with a warm and humid climate. Specifically, temperatures lie consistently above the 30°C (86°F) mark, ranging from an average of 30.1°C (86.2°F) in March to 32.7°C (90.9°F) in May. Simultaneously, humidity levels remain relatively stable, oscillating from 76% in March, to 74% in May. The rainfall pattern presents an interesting trend going from a low average of 39mm (1.54") in March to a relatively higher average of 79mm (3.11") in May. The sea temperature holds steady at 29°C (84.2°F) to 30°C (86°F) throughout the season of rebirth, enhancing swimming conditions.Summer weather in Arugam Bay
Water sports enthusiasts appreciate the summer season in Arugam Bay for its predictable and warm weather. Temperatures fluctuate minimally, remaining within the narrow range of 32.6°C (90.7°F) in July to 32.3°C (90.1°F) in August. Humidity descends to 68% in June and July, delivering a relative respite from the high moisture content experienced in the rest of the year. Consequently, rainfall and sea temperature fall within manageable levels at 30mm (1.18") to 55mm (2.17") and 28°C (82.4°F) to 29°C (84.2°F) respectively, maintaining the conditions for water activities and beach recreation.Autumn weather in Arugam Bay
Autumn in Arugam Bay is a period of transition characterized by rising rainfall levels and steady temperatures. Specifically, rainfall figures rise noticeably, with September recording 81mm (3.19"), October 177mm (6.97") and November hiting 220mm (8.66"). Even though temperatures remain stable, ranging from 31.8°C (89.2°F) in September to 29.3°C (84.7°F) in November, the increase in rainfall frequency impacts outdoor activities in the region.Winter weather in Arugam Bay
Winter carries mixed prospects in terms of weather conditions in Arugam Bay. Temperatures remain consistently warm, with the lowest monthly average of 28°C (82.4°F) registered in December. Rainfall levels peak by recording the highest average in December with 272mm (10.71") and then gradually decrease to 120mm (4.72") in January. Visitors during this period might experience a significant number of rainy days along with daily sunshine hours reducing from 11.8 hours in January to 11.7 in February.Weather in January
For tourists visiting Arugam Bay, Sri Lanka in January, it is essential to be prepared for the unpredictable weather. Heavy rainfall is expected to hit the area with 120mm (4.72") of precipitation spread over approximately 19 days. Weather in January »Weather in February
Arugam Bay transitions into February with a significant decrease in precipitation, showing a drier climate than the previous month. This month, typical of the dry season, could be characterized as the "windy month", with wind speeds dropping to 12.3km/h (7.6mph) from 13.9km/h (8.6mph) in January. Weather in February »Weather in March
In March, the signs of the approaching summer are evident in Arugam Bay's weather. This month is marked as the driest period, with only 39mm (1.54") of precipitation observed. The sunny days surpass the rainy ones, and there is a rise in daylight, affording tourists ample time to indulge in outdoor activities. Weather in March »Weather in April
April introduces the much-anticipated summer at Arugam Bay, Sri Lanka showcasing a blend of elevated temperatures and reduced rainfall. While the heat begins to peak, reaching an average high of 31.8°C (89.2°F), it combines ideally with the 11.2 hours of sunshine the area receives to create ideal beach conditions. Weather in April »Weather in May
Weather in May continues to favor tourism in Arugam Bay, paving the way for seamless fun and leisure. An upward trend in the temperature provides a conducive environment for water sports activities, with May experiencing the highest average sea temperature of the year. Weather in May »Weather in June
Kick-starting summer, June is characterized by a significant increase in daylight hours in Arugam Bay. The average temperatures plateau at this time of the year, particularly maintaining consistency in daily highs and lows. While the Bay embraces the summer season, it also begins experiencing commendable reductions in humidity. Weather in June »Weather in July
July carries forward the momentum of the favorable weather from the preceding months in Arugam Bay. This month's weather shows consistency, especially in terms of sea temperature, daily highs, and lows, reflecting on the stability of the summer. Weather in July »Weather in August
Weather in August in Arugam Bay occurs in sync with the prevailing summer rhythm. Even though there is a mild increase in rainfall, it does not disrupt the ongoing outdoor activities. The climate continues to be warm, which accommodates both sunbathers and watersports enthusiasts. Weather in August »Weather in September
September seems to be the threshold month, marking the beginning of the transition from summer to monsoon in Arugam Bay. As the rains begin to pour in, with September experiencing 81mm (3.19") of precipitation, the weather signals the onset of a wetter period ahead. Weather in September »Weather in October
With the arrival of October, Arugam Bay braces itself for the monsoon season. However, despite the significant upsurge in rainfall compared to the preceding months, the weather continues to remain mild, thus not disrupting life in the Bay. Weather in October »Weather in November
November embodies the full-fledged monsoon season with the maximum rainfall of 220mm (8.66") witnessed in Arugam Bay throughout the year. Coupled with the increasing cloud percentages, which block out most of the sun, November provides an intriguing change of weather from a sun-soaked beach to a monsoon-drenched shoreline. Weather in November »Weather in December
Rounding off the year, December continues to host the monsoon season within Arugam Bay with a significant increase in rain recorded from the preceding month. Even though the rain dominates the weather, the temperatures remain on the warmer side offering a unique warm rainfall situation. Weather in December »Updated: Aug 7, 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
Arugam Bay experiences its lowest temperatures in January, with an average peak of 27.3°C (81.1°F) and a low of 24°C (75.2°F).
Throughout the year, there are 237.8 rainfall days, and 1259mm (49.57") of precipitation is accumulated.
January, February, July through September and December, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater.
The months with the highest UV index are January through October, with an average maximum UV index of 7.
The month with the warmest seawater is April, with an average sea temperature of 30°C (86°F).
In Arugam Bay, June registers the highest temperatures, averaging 33°C (91.4°F) at the peak and 26.3°C (79.3°F) at the lowest.
The months with the lowest humidity are June and July, with an average relative humidity of 68%.
June is the month with the least rainfall. Rain falls for 15.3 days and accumulates 30mm (1.18") of precipitation.
With an average of 12h and 30min of daylight, June has the longest days of the year.
June has the most sunshine of the year, with an average of 11.8h of sunshine.
The months with the lowest UV index are November and December, with an average maximum UV index of 6.
December is the most humid month, with an average relative humidity of 81%.
The month with the most rainfall is December, when the rain falls for 25.2 days and typically aggregates up to 272mm (10.71") of precipitation.
The month with the shortest days is December, with an average of 11h and 42min of daylight.
Arugam Bay does not utilize Daylight Saving Time (DST). +0530 timezone is used over the entire year.
December has the least sunshine of the year, with an average of 5.4h of sunshine.
Average temperature
Arugam Bay, Sri Lanka
The warmest month (with the highest average high temperature) is June (33°C).
The month with the lowest average high temperature is January (27.3°C).
The month with the highest average low temperature is May (26.6°C).
The coldest month (with the lowest average low temperature) is January (24°C).
Average pressure
Arugam Bay, Sri Lanka
- Average pressure in January:
1011.8mbar - Average pressure in February:
1011.5mbar - Average pressure in March:
1010.8mbar - Average pressure in April:
1009.5mbar - Average pressure in May:
1007.7mbar - Average pressure in June:
1007.3mbar
- Average pressure in July:
1007.5mbar - Average pressure in August:
1007.9mbar - Average pressure in September:
1008.8mbar - Average pressure in October:
1009.4mbar - Average pressure in November:
1009.7mbar - Average pressure in December:
1010.4mbar
The month with the highest atmospheric pressure is January (1011.8mbar).
The month with the lowest atmospheric pressure is June (1007.3mbar).
Average wind speed
Arugam Bay, Sri Lanka
- Average wind speed in January:
13.9km/h - Average wind speed in February:
12.3km/h - Average wind speed in March:
10.3km/h - Average wind speed in April:
9.8km/h - Average wind speed in May:
9.2km/h - Average wind speed in June:
10.5km/h
- Average wind speed in July:
10.9km/h - Average wind speed in August:
10.2km/h - Average wind speed in September:
9.1km/h - Average wind speed in October:
9.4km/h - Average wind speed in November:
10.7km/h - Average wind speed in December:
13km/h
The windiest month (with the highest average wind speed) is January (13.9km/h).
The calmest month (with the lowest average wind speed) is September (9.1km/h).
Average humidity
Arugam Bay, Sri Lanka
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are June and July (68%).
Average rainfall
Arugam Bay, Sri Lanka
The wettest month (with the highest rainfall) is December (272mm).
The driest month (with the least rainfall) is June (30mm).
Average rainfall days
Arugam Bay, Sri Lanka
- Average rainfall days in January:
18.7 days - Average rainfall days in February:
15.3 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
19.1 days - Average rainfall days in May:
20.7 days - Average rainfall days in June:
15.3 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
20.6 days - Average rainfall days in September:
22 days - Average rainfall days in October:
25.5 days - Average rainfall days in November:
25.5 days - Average rainfall days in December:
25.2 days
The months with the highest number of rainy days are October and November (25.5 days).
The month with the least rainy days is March (12.8 days).
Average sea temperature
Arugam Bay, Sri Lanka
The best month for swimming (with the highest average sea temperature) is April (30°C).
The coldest months (with the lowest average sea temperature) are January, February, July, August, September and December (28°C).
Average daylight / Average sunshine
Arugam Bay, 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:
7h and 30min - Average sunshine in February:
8h and 12min - Average sunshine in March:
9h and 24min - Average sunshine in April:
11h and 12min - Average sunshine in May:
11h and 36min - Average sunshine in June:
11h and 48min
- Average sunshine in July:
11h and 42min - Average sunshine in August:
11h and 42min - Average sunshine in September:
10h and 42min - Average sunshine in October:
8h and 42min - Average sunshine in November:
7h and 36min - Average sunshine in December:
5h and 24min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days
Arugam Bay, Sri Lanka
- Average sunshine days in January:
8.3 days - Average sunshine days in February:
10.8 days - Average sunshine days in March:
15.5 days - Average sunshine days in April:
7.4 days - Average sunshine days in May:
6.2 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
11.2 days - Average sunshine days in August:
6.9 days - Average sunshine days in September:
5.8 days - Average sunshine days in October:
4.4 days - Average sunshine days in November:
3.2 days - Average sunshine days in December:
4.2 days
The month with the most sunshine days is March (15.5 days).
The month with the least sunshine days is November (3.2 days).
Average UV index
Arugam Bay, Sri Lanka
The months with the highest UV index are January, February, March, April, May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are November and December (UV index 6).
Average cloud cover
Arugam Bay, Sri Lanka
The month with the most cloud cover is December (Cloud cover 50).
The month with the least cloud cover is April (Cloud cover 22).
Average visibility
Arugam Bay, Sri Lanka
The months with the highest visibility are January, February, March, April, May, June, July, August, September and October (10km).
The months with the lowest visibility are November and December (9km).
