More rain nationwide, North hardest hit, Bangkok sees storms and gusts
Thundershowers and gusty winds are forecast for upper Thailand, while the South may see isolated heavy rain and rougher seas during storms.
- Rain is forecast to increase nationwide across Thailand, with thundershowers and gusty winds expected in upper Thailand.
- The Northern region is predicted to be the hardest hit, with the heaviest rainfall covering 60% of the area.
- Bangkok is expected to experience thunderstorms and gusty winds in approximately 40% of its area.
The Thai Meteorological Department forecast the weather for Wednesday (May 13, 2026), saying rain would increase across Thailand.
The North was described as seeing the heaviest rain, with rain expected in 60% of the area, while Bangkok would have thundershowers and gusty winds.
For the next 24 hours, isolated heavy rain is expected in the South because southwesterly winds are covering the Andaman Sea and the southern region.
Waves in the Gulf of Thailand and the Andaman Sea are about 1 metre high, rising to more than 2 metres in thundershowers.
Mariners are advised to navigate with caution and avoid areas with thundershowers.
For upper Thailand, thundershowers and gusty winds are expected in some areas, with isolated heavy rain in the North and Central region, because southerly and southwesterly winds are covering upper Thailand.
Hot weather will continue in some areas.
People are advised to beware of thundershowers, gusty winds, heavy rain and accumulated rainfall, which could cause flash floods and run-off from forested areas, especially foothill areas near waterways and low-lying areas.
Farmers are advised to strengthen fruit trees, prepare to prevent possible damage to agricultural produce and livestock, and take care of their health during changing weather conditions.
In addition, from Thursday (May 14, 2026) to Monday (May 18, 2026), Thailand is expected to see more rain and isolated heavy to very heavy rain in the North, Central, East and South.
This is because an active low-pressure cell covering the lower Bay of Bengal is expected to move up to cover the upper Bay of Bengal, while the southwest monsoon covering the Andaman Sea, Thailand and the Gulf of Thailand is expected to strengthen.
Winds and waves in the Andaman Sea and Gulf of Thailand are also expected to strengthen.
The Andaman Sea is forecast to have waves 2–3 metres high, rising above 3 metres in thundershowers.
The upper Gulf of Thailand is forecast to have waves about 2 metres high, rising above 2 metres in thundershowers.
Weather forecast for Thailand from 6am on Wednesday (May 13, 2026) to 6am on Thursday (May 14, 2026)
Bangkok and vicinity
- Thunderstorms are expected in 40% of the area, with gusty winds in some places.
- Minimum temperature: 26–28 degrees Celsius
- Maximum temperature: 33–35 degrees Celsius
- Southerly winds: 10–20 kilometres per hour
Northern region
- Hot during the day, with thundershowers in 60% of the area, gusty winds and isolated heavy rain in Mae Hong Son, Chiang Mai, Tak and Kamphaeng Phet.
- Minimum temperature: 21–26 degrees Celsius
- Maximum temperature: 31–37 degrees Celsius
- Southwesterly winds: 10–15 kilometres per hour
Northeastern region
- Hot during the day, with thundershowers in 30% of the area and gusty winds in some places, mostly in Loei, Nong Khai, Nong Bua Lamphu, Chaiyaphum, Nakhon Ratchasima, Buri Ram, Surin, Si Sa Ket and Ubon Ratchathani.
- Minimum temperature: 24–27 degrees Celsius
- Maximum temperature: 35–37 degrees Celsius
- Southwesterly winds: 10–20 kilometres per hour
Central region
- Hot during the day, with thundershowers in 60% of the area, gusty winds and isolated heavy rain in Nakhon Sawan, Uthai Thani, Kanchanaburi and Ratchaburi.
- Minimum temperature: 24–26 degrees Celsius
- Maximum temperature: 34–37 degrees Celsius
- Southwesterly winds: 10–20 kilometres per hour
Eastern region
- Hot during the day, with thundershowers in 40% of the area and gusty winds in some places, mostly in Nakhon Nayok, Chachoengsao, Chon Buri, Rayong, Chanthaburi and Trat.
- Minimum temperature: 24–26 degrees Celsius
- Maximum temperature: 31–37 degrees Celsius
- Southerly winds: 15–30 kilometres per hour
- Waves are about 1 metre high, rising to more than 2 metres in thundershowers.
Southern region, east coast
- Thundershowers are expected in 60% of the area, with isolated heavy rain in Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Songkhla, Pattani, Yala and Narathiwat.
- Minimum temperature: 23–26 degrees Celsius
- Maximum temperature: 32–35 degrees Celsius
- Southwesterly winds: 15–30 kilometres per hour
- Waves are about 1 metre high, rising to more than 2 metres in thundershowers.
Southern region, west coast
- Thundershowers are expected in 60% of the area, with isolated heavy rain in Ranong, Phang Nga, Trang and Satun.
- Minimum temperature: 24–27 degrees Celsius
- Maximum temperature: 33–35 degrees Celsius
- Southwesterly winds: 15–30 kilometres per hour
- Waves are about 1 metre high, rising to more than 2 metres in thundershowers.
