Sri Lanka Weather in September

The weather in Sri Lanka in September is hot and wet with the average temperature of 23-30℃(73.4-86℉) and the rainfall of 161mm. The climate of south and west coasts is hot but seas there are rough since the cyclone might occur in this month, so it is not recommended to go to beaches of these places. While the east coasts expect a great weather condition, suitable for beach lovers. The central Sri Lanka is hot and humid with the short shower.
The hottest cities in Sri Lanka in September:
Trincomalee: 34℃(93.2℉)
The coolest cities in Sri Lanka in September:
Nuwaea Eliya: 12℃(53.6℉)

Averages for Sri Lanka Weather in September

High Temperature
30°C (86°F)
Low Temperature
23°C (73.4°F)
161 mm (6.3 in)
05:59 ~ 06:03
18:02 ~ 18:18

 September Temperatures in Sri Lanka

What to Wear
If you tend to travel to Sri Lanka in September, you should pack thin and breathable clothes like t-shirts, skirts and shorts. Sunscreen, umbrella and sunglasses are necessary to take.
September Travel Guide – Where to Go & Tips
Tourism Rate: 

Horton Plains National Park

It is a spectacular plateau located in the Central Province of Sri Lanka, consisting of diverse ecosystems of cloud forests, grassland and so on. You can watch the breathtaking views and many kinds of flora and fauna. It is also a paradise for trekking lovers; it usually takes 3 hours to have a circular trek route. The most famous attractions in the park are the World’s End, a steep escarpment and Baker’s Fall.


It is a commercial harbor, located in the northeastern of Sri Lanka with the beautiful natural scenery and many wonderful beaches. It is a great place for swimming, diving and snorkeling and has become a popular sites for whale watching in recent years.

Besides Trincomalee, villages of Uppuveil and Nilaveli have many fine beaches. You can enjoy a great holiday just watching the authentic sea view and doing nothing with few tourists. In the Pigeon Island, you can appreciate the beautiful coral reef and observe turtles.

Trincomalee is home to many Hindu temples; you can visit Koneswaram Temple, Gokana Temple or Seruvila Mangala Raja Maha Viharaya. You need to take off shoes before entering the temples.


It is an east coastal city with beautiful sea views. Batticaloa Lighthouse is a must-go spot where you can overlook the panoramic view of this city at the top of it. You can also head to the beaches of Kallady and Pasikuda with the white sand and few tourists.


It is a charming north coastal city. You can visit the most famous Hindu Temple, Nallur Kovil, which asks male visitors to take off the top showing their respects. The beaches here are less commercialized with blue water and white sand that you should not miss., such as Casuarina Beach.

The Cultural Triangle

It consists of Anuradhapura, Polonnaruwa and Kandy. If you want to realize the history, religious and architectural culture of Sri Lanka, it is the place you must go. You can visit the Sigiriya Lion Rock, The Temple of Tooth, etc.  

September Weather of Major Sri Lanka Cities
Temperature Sunrise / Sunset Humidity
High Low
34°C/ 93.2°F 23°C / 73.4°F 07:25/ 17:32 44
33°C / 91.4°F 23°C / 73.4°F 07:20/ 18:07 84
33°C / 91.4°F 22°C / 71.6°F 07:56/ 18:38 79
30°C / 86°F 15°C / 59°F 07:45/ 18:30 83
29°C / 84.2°F 14°C / 57.2°F 07:08/ 18:13 72
33°C / 91.4°F 23°C / 73.4°F 07:23/ 18:22 73
31°C / 87.8°F
23°C / 73.4°F 07:41/ 18:34 79
30°C / 86°F 22°C / 71.6°F 06:51/ 17:35 75
30°C / 86°F 17°C / 62.6°F 06:58/ 16:36 72
29°C / 84.2°F   24°C / 75.2°F 07:44/ 17:48 57
Nuwara Eliya
30°C / 86°F 15°C / 59°F 07:03/ 18:11 74
Sri Jayewardenepura-Kotte
31°C / 87.8°F
25°C / 77°F
07:08/ 18:13
34°C/ 93.2°F
25°C / 77°F
07:08/ 18:13