Federation for Environment, Climate and Technology

Federation for Environment, Climate and Technology FECT is a non-profit organization undertaking research for societal welfare in Southern Asia and around the Indian Ocean

Predictions: From12 – 18 May, the US NOAA Climate Prediction Center predicts that the rainfall shall increase across SL....
14/05/2026

Predictions: From12 – 18 May, the US NOAA Climate Prediction Center predicts that the rainfall shall increase across SL.
During this period, Western Hills & Plains are predicted to receive rainfall over 105-135 mm. From 13 - 19 May, wind speeds
are predicted to be 6-10 m/s.

Monitoring: A Low Pressure Area (LPA) developed over the Bay of Bengal (BoB) on 10th May, with wind speed ranging from
20-30 m/s. The LPA remained over the southwest of Bay of Bengal until 12th May. This caused the rainfall across SL to
increase. During 6 - 12 May, the average daily rainfall was 14 mm. The highest daily rainfall was in in Ratmalana - 202 mm on
12 May, Ratnapura - 131 mm on 12 May, Katunayaka – 94 mm on 8 May, Puttalam – 89 mm on 11 May. During 4 – 10 May,
winds were from Northwest with 2–5 m/s. Overall, the temperature was typical for May across SL. The Eastern Plains had an
average maximum temperature of 32.9°C. The Eastern Hills had an average minimum temperature of 19.2°C.

During the past week, daily average AQI levels remained within the “Good” to “Unhealthy for Sensitive Groups” range. The...
13/05/2026

During the past week, daily average AQI levels remained within the “Good” to “Unhealthy for Sensitive Groups” range. The highest daily average AQI value of 141 was recorded in Digana on 5th May, falling under the “Unhealthy for Sensitive Groups” category. On 6th May, Akurana also recorded a daily average AQI value of 101, which also fell under the “Unhealthy for Sensitive Groups” category.

In general, cleaner air flowed into Sri Lanka from the southwestern direction during this period, contributing to generally favorable conditions. However, polluted air masses were also transported toward Sri Lanka from India through the Arabian Sea.

In terms of weekly averages, Akurana, Digana, Nuwara Eliya, Colombo, Mirihana, Negombo, Battaramulla, Chilaw, Kalawana, and Anuradhapura recorded “Moderate” AQI levels, while all other monitored locations remained within the “Good” category.

Weekly Air Quality Index (AQI) Levels:

Moderate (AQI 51-100): Akurana, Digana, Nuwara Eliya, Colombo, Mirihana, Negombo, Battaramulla, Chilaw, Kalawana, Anuradhapura
Good (AQI 0-50): Kurunegala, Ambalantota, Mannar, Trincomalee, Jaffna

Read more: https://fect.lk/air-quality/

RSMC Latest Update – 11.30 AM ISTA Low Pressure Area (LPA) is currently located over the southwest Bay of Bengal. This s...
12/05/2026

RSMC Latest Update – 11.30 AM IST

A Low Pressure Area (LPA) is currently located over the southwest Bay of Bengal. This system is expected to increase rainfall across Sri Lanka, with the Western, Sabaragamuwa, Southern, Northern, and North-Western provinces likely to receive over 100 mm of rainfall.

However, according to the latest RSMC predictions, the LPA is not expected to intensify further. At present, the probability of it developing into a cyclonic storm remains very low.

RSMC නවතම යාවත්කාලීන කිරීම – පෙ.ව. 11.30 IST

නිරිතදිග බෙංගාල බොක්ක ප්‍රදේශයේ අඩු පීඩන කලාපයක් (LPA) දැනට පවතින අතර, එහි බලපෑමෙන් ශ්‍රී ලංකාව පුරා වර්ෂාපතන තත්ත්වය ඉහළ යා හැකි බව අපේක්ෂා කෙරේ. විශේෂයෙන් බටහිර, සබරගමුව, දකුණු, උතුරු සහ වයඹ පළාත්වලට මිලිමීටර් 100 ඉක්මවන වර්ෂාපතනයක් ලැබිය හැකිය.

කෙසේ වෙතත්, නවතම RSMC අනාවැකි අනුව මෙම අඩු පීඩන කලාපය තවදුරටත් තීව්‍ර වීමේ හැකියාව අඩු බව සඳහන් වේ. දැනට එය සුළි කුණාටුවක් දක්වා වර්ධනය වීමේ සම්භාවිතාව ඉතා පහළ මට්ටමක පවතී.



#කාලගුණය #වැසි #අධිකවැසි #කාලගුණඅවවාද #ආරක්ෂිතවසිටින්න

Rainfall in Sri Lanka has picked up after several dry weeks. During 29 Apr - 5 May, the average daily rainfall was 4.5 m...
08/05/2026

Rainfall in Sri Lanka has picked up after several dry weeks. During 29 Apr - 5 May, the average daily rainfall was 4.5 mm. The highest daily rainfall was in Mullaitivu - 75 mm on 4 May, Bandarawela - 41 mm on 2 May. During 27 Apr – 3 May, winds were from Southwest with 2–3 m/s. Overall the temperature was typical for April across SL. The Eastern Plains had an average maximum temperature of 35.0°C. The Eastern Hills had an average minimum temperature of 19.4°C.

Predictions: From 5 – 11 May, the US NOAA Climate Prediction Center predicts that the rainfall shall increase across SL....
08/05/2026

Predictions: From 5 – 11 May, the US NOAA Climate Prediction Center predicts that the rainfall shall increase across SL. During this period, Western Hills & Plains are predicted to receive rainfall over 135 mm. From 6 - 12 May, wind speeds are predicted to be 1-3 m/s.

Monitoring: Rainfall in Sri Lanka has picked up after several dry weeks. During 29 Apr - 5 May, the average daily rainfall was 4.5 mm. The highest daily rainfall was in Mullaitivu - 75 mm on 4 May, Bandarawela - 41 mm on 2 May. During 27 Apr – 3 May, winds were from Southwest with 2–3 m/s. Overall the temperature was typical for April across SL. The Eastern Plains had an average maximum temperature of 35.0°C. The Eastern Hills had an average minimum temperature of 19.4°C.

Predictions: From 28 Apr – 1 May, the US NOAA Climate Prediction Center predicts that the rainfall shall increase across...
30/04/2026

Predictions: From 28 Apr – 1 May, the US NOAA Climate Prediction Center predicts that the rainfall shall increase across SL. During this period, Western Hills & Plains are predicted to receive rainfall ranging from 65-85 mm. From 29 Apr - 5 May, wind speeds are predicted to be 2-6 m/s.

Monitoring: Sri Lanka has reached the end of its dry season. During 22–28 April, the average daily rainfall was 4 mm. The most significant rainfall was observed in the Coconut Triangle area (Kurunegala–Katunayaka–Colombo region), with Kurunegala recording the highest daily rainfall of 61 mm on 22 April and Katunayaka recording 50 mm on 26 April. Vavuniya also recorded notable rainfall of 45 mm on 28 April. During 20 – 26 Apr, winds were from the southeast with 1–3 m/s. Overall the temperature was typical for April across SL. The Southern plains had an average maximum temperature of 33.4° C. The Eastern Hills had an average minimum temperature of 19.0°C.

During the past week, daily average AQI values remained within the “Good” to “Moderate” categories. The highest daily AQ...
30/04/2026

During the past week, daily average AQI values remained within the “Good” to “Moderate” categories. The highest daily AQI value of 86 was recorded in Digana on 24th April, which falls under the “Moderate” category.

When considering weekly averages, Akurana, Digana, Colombo (Gregory's Road), Mirihana, Negombo, Battaramulla (CEA), Chilaw (CEA), Trincomalee, and Jaffna recorded “Moderate” weekly average values, while the other monitored areas recorded “Good” weekly average AQI values. Akurana and Digana recorded the highest weekly average AQI value of 68.

During the past week, air masses continued to influence local air quality, with pollutants showing some rise in specific urban centers during shifts in wind patterns. Overall, the air quality remained relatively stable across the monitored regions compared to the previous week.

Weekly Air Quality Index (AQI) Levels:

Moderate (AQI 51-100): Akurana, Digana, Colombo (Gregory's Road), Mirihana (Cleanco), Negombo, Battaramulla (CEA), Chilaw (CEA), Trincomalee, Jaffna.
Good (AQI 0-50): Nuwara Eliya, Kurunegala, Kalawana, Ambalantota, Mannar, Anuradhapura.

Read more: https://fect.lk/air-quality/

27/04/2026

7 likes, 5 comments. "සතිපතා කාලගුණ අනාවැකිය සහ නිරීක්ෂණය : 2026 අප්‍රේල් 24– මැයි 04"

Predictions:From 21 – 27 Apr, the US NOAA Climate Prediction Center predicts that the rainfall shall occur across SL. Du...
24/04/2026

Predictions:From 21 – 27 Apr, the US NOAA Climate Prediction Center predicts that the rainfall shall occur across SL. During this period, Western Hills & Plains are predicted to receive rainfall ranging from 55-65 mm. From 22 - 28 Apr, wind speeds are predicted to be 1-2 m/s.

Monitoring: Sri Lanka is reaching at end of its dry season. During the first three weeks of April (3 - 18 Apr), SL received 10 mm of rainfall than the expected rainfall. During 15 - 22 Apr, the average daily rainfall was 4 mm, a higher rainfall compared to the previous week - 3 mm. The highest daily rainfall was in Maha Illuppallama - 76 mm on 20 Apr, Badulla - 52 mm on 19 Apr and Ratnapura - 35 mm on 15 Apr. During 30 Mar – 5 Apr, winds were from Northeast with 1–3 m/s. Overall the temperature was typical for April across SL. The Southern plains had an average maximum temperature of 33.6°C. The Eastern Hills had an average minimum temperature of 18.3°C.

24/04/2026

4 likes, 3 comments. "වායු ගුණාත්මකභාවය (සතියේ වාර්තාව) 🌫️ | 2026 අප්‍රේල් 13–19 නිරීක්ෂණය සහ 22–27 අනාවැකිය"

During the past week, daily average AQI values ranged from “Good” to “Moderate.” Mirihana recorded the highest daily ave...
21/04/2026

During the past week, daily average AQI values ranged from “Good” to “Moderate.” Mirihana recorded the highest daily average AQI value of 99, which falls under the “Moderate” category, on 13th April.

When considering weekly averages, Akurana,Digana, Nuwara Eliya, Colombo, Mirihana, Negombo, Battaramulla, Chilaw, Mannar, Jaffna, and Anuradhapura recorded “Moderate” weekly average values, while the other monitored areas recorded “Good” weekly average AQI values. Akurana recorded the highest weekly average AQI value of 76.

During the past week, air masses primarily entered Sri Lanka from the southwestern direction, bringing cleaner air. It was observed that in areas such as Colombo and Puttalam, pollutants sometimes accumulate when wind directions change.

Overall, it is observed that the air quality during the past week has improved compared to the previous week.

Weekly Air Quality Index (AQI) Levels:

Moderate (AQI 51-100): Akurana, Digana, Nuwara Eliya, Colombo(Gregory's Road), Mirihana(Cleanco), Negombo, Battaramulla(CEA), Chilaw(CEA), Mannar, Jaffna, Anuradhapura
Good (AQI 0-50): Kurunegala, Kalawana, Ambalantota, Trincomalee.

Read more:https://fect.lk/air-quality/

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