Thailand Weather Alert: Heavy Rain and Thunderstorms Forecasted for 31 Provinces on June 17, 2025

As the skies turn a foreboding shade of gray, the Thai Meteorological Department (TMD) has issued a critical weather advisory for a whopping 31 of the country’s provinces. Batten down the hatches, folks, because Mother Nature is about to put on quite the show, especially in the north where a drenching 60% of the area is expected to experience heavy rainfall. Residents are earnestly encouraged to keep their ears to the ground and stay informed about affected areas. Today, June 17th, the forecast for the next 24 hours warns of considerable rainfall in northern Thailand, while certain southern regions are bracing for thunderous outbursts. What’s behind this ominous forecast, you ask? A moderate southwest monsoon is draping itself majestically over the Andaman Sea, Thailand, and the Gulf of Thailand, while a faint monsoon trough lingers like a shadow over upper Myanmar and northern Laos before cascading into a low-pressure area blanketing northern Vietnam.

Set sail on the Andaman Sea or the Gulf of Thailand, and you may find yourself in need of a firm grip on the wheel, as moderate wind and waves go hand in hand with such conditions. Mariners be advised: the upper Andaman Sea is a frothy dance of waves that may rise between 1 to 2 meters, expanding over 2 meters in storm-tossed areas. Heed the call to caution and steer clear of thunderous locales!

From 6 am today to 6 am tomorrow, northern Thailand anticipates thunderstorms in an astonishing 60% of its regions. Those in Mae Hong Son, Chiang Mai, Chiang Rai, Phayao, Nan, and Tak provinces may wish to keep their umbrellas within reach, as heavy rain stretches toward them. Temperatures are expected to oscillate like a pendulum, from the cooler end of 24 to 26 °C swooping dramatically to highs of 32 to 36 °C, swept by the gentle southwest winds clocking at 5 to 15 kilometers per hour.

Meanwhile, in northeast Thailand, thunderstorms are predicted over 30% of the terrain. Loei, Nong Khai, Bueng Kan, Udon Thani, Sakon Nakhon, and Nakhon Phanom are in for a tempestuous tango. Here, temperatures will shimmy from 23 to 26 °C up to a sizzling 34 to 36 °C, driven by southwest breezes at 10 to 20 kilometers per hour.

Central Thailand, not one to be outdone, will also witness 30% of its expanse drenched in thunderstorms, focusing on Uthai Thani, Kanchanaburi, and Ratchaburi provinces. Temperatures here stretch from 24 to 26 °C to 33 to 36 °C, with the southwest winds whispering through at 10 to 20 kilometers per hour. East Thailand holds the line with 30% of its areas under a thunderstorm spell, with Chon Buri, Rayong, Chanthaburi, and Trat provinces gearing up for wet spells. The mercury will range from 25 and 27 °C and 32 and 35 °C, with winds at a lively 15 to 30 kilometers per hour and tranquil seas rolling to 1 meter, spiking over 2 meters during storms.

In South Thailand (east coast), thunderstorms will scatter across 40% of the area with Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, and Narathiwat provinces in the line of stormy fire. Look for temperatures from 24 to 26 °C, peaking at 33 to 35 °C, with southwest gusts at 15 to 30 kilometers per hour. The sea promises lively waves around 1 meter high, climbing over 2 meters if a storm decides to join the party. On the west coast, South Thailand will encounter a similar 40% swathe of thunderstorms, strongly impacting Phang Nga, Phuket, Krabi, and Trang provinces. From Ranong upwards, winds rush at a sprightly 15 to 35 kilometers per hour, stirring seas to 1 to 2 meters, surging over 2 meters in storm-battered regions. From Phang Nga downwards, expect gusts at a modest 15 to 30 kilometers per hour, with wave heights echoing the dramatic ocean saga.

As for the bustling metropolis of Bangkok and its vicinity, the forecast spells thunderstorms across 30% of the region. Expect temperature ranges that restlessly move from a cool 26 to 27 °C up to a tropical 33 to 36 °C, under the sway of southwest winds at 10 to 20 kilometers per hour. Residents are, once more, gently urged to remain watchful and informed, adapting to the whimsical whims of weather as the elements play out their grand narrative in Thailand.