The climate at Pulau Langkawi can be described as tropical and is strongly influenced by the monsoon. The temperatures are constantly high throughout the year, there are only minimal fluctuations. Night values of about 23 °C are usual, while during the day 31 °C to 34 °C are measured on average.

The dry season on Langkawi falls on the travel season from December to mid-April, the rainy season runs from about the beginning of May to mid-November. The highest rainfall is in September and October, the driest months are January and February.

Due to its sheltered location in the lee of Sumatra, large amounts of rain are already intercepted on the way to Langkawi, so that generally less precipitation is recorded than in other regions of Southeast Asia. The water temperatures on Langkawi are between 25 °C to 29 °C and are suitable for swimming all year round.