Weather Today, 17 Oct: Heavy Rain in Some Areas, Beware of Flash Floods and Mudslides

The Meteorological Department reports that on 17 October 2026, heavy rain will continue in some areas, while Bangkok has thunderstorms over 60% of its area.

On 16 October 2026, the websiteMeteorological Departmentissued the daily weather forecast from 06:00 today until 06:00 tomorrow.

General weather conditions

The 24-hour forecast indicates that the central, eastern, and southern regions will still experience heavy rain in some areas. Residents there should be cautious of dangers from thunderstorms, strong gusty winds, heavy rain, and accumulated rainfall that may cause flash floods and mudslides, especially in foothill areas near waterways and lowlands.

This is due to a weak high-pressure system or cool air mass covering upper northern, upper northeastern regions, and the South China Sea, resulting in easterly and southeasterly winds bringing moisture from the South China Sea over Thailand and the Gulf of Thailand.

For the Andaman Sea and Gulf of Thailand, areas with thunderstorms will have waves higher than 2 meters. Mariners should check their routes and navigate with caution, avoiding areas with thunderstorms.

From 18 to 20 October 2026, the southern and eastern regions will experience continuous rain with heavy to very heavy rainfall in some places. From 21 to 25 October 2026, the lower northeastern region, central region, Bangkok and vicinity, eastern region, and upper southern region will see increased rain with heavy to very heavy rain in some areas accompanied by strong gusty winds.

This is because the monsoon trough will initially pass through the lower southern region along with the southwest monsoon covering the lower Andaman Sea. Later, the trough will shift northward over the upper southern region, upper Gulf of Thailand, and eastern region, while the high-pressure system or cool air mass from China will extend over the upper northern, upper northeastern regions, and the South China Sea.

At this time, people are advised to closely follow weather updates and be alert to dangers from heavy to very heavy rain and accumulated rainfall that may cause flash floods and mudslides.

Weather forecast for Thailand

(06:00 today until 06:00 tomorrow)

Northern region

• Thunderstorms cover 30% of the area with some strong gusty winds, mainly in Mae Hong Son, Chiang Mai, Tak, and Kamphaeng Phet provinces.
• Lowest temperatures range from 21 to 26 degrees Celsius.
• Highest temperatures range from 34 to 36 degrees Celsius.
• East winds at speeds of 10–20 km/h.

Northeastern region

• Thunderstorms cover 20% of the area with some strong gusty winds, mainly in Loei, Chaiyaphum, Nakhon Ratchasima, Buriram, and Surin provinces.
• Lowest temperatures range from 21 to 24 degrees Celsius.
• Highest temperatures range from 33 to 35 degrees Celsius.
• East winds at speeds of 10–25 km/h.

Central region

• Thunderstorms cover 40% of the area with heavy rain and some strong gusty winds, mainly in Lopburi, Saraburi, Suphanburi, Ayutthaya, Kanchanaburi, Ratchaburi, and Nakhon Pathom provinces.
• Lowest temperatures range from 23 to 25 degrees Celsius.
• Highest temperatures range from 33 to 36 degrees Celsius.
• Southeast winds at speeds of 10–20 km/h.

Eastern region

• Thunderstorms cover 60% of the area with heavy rain in some places, mainly in Nakhon Nayok, Chonburi, Rayong, Chanthaburi, and Trat provinces.
• Lowest temperatures range from 24 to 26 degrees Celsius.
• Highest temperatures range from 33 to 35 degrees Celsius.
• Southeast winds at speeds of 10–30 km/h.
• Seas have waves below 1 meter, but waves exceed 2 meters in areas with thunderstorms.

Southern region (east coast)

• Thunderstorms cover 60% of the area with heavy rain in some places, mainly in Chumphon, Surat Thani, Nakhon Si Thammarat, Songkhla, Yala, and Narathiwat provinces.
• Lowest temperatures range from 23 to 25 degrees Celsius.
• Highest temperatures range from 32 to 35 degrees Celsius.
• Southeast winds at speeds of 15–30 km/h.
• Seas have waves about 1 meter high, but waves exceed 2 meters in areas with thunderstorms.

Southern region (west coast)

• Thunderstorms cover 60% of the area with heavy rain in some places,
• mainly in Ranong, Phang Nga, Phuket, Krabi, Trang, and Satun provinces.
• Lowest temperatures range from 23 to 25 degrees Celsius.
• Highest temperatures range from 32 to 36 degrees Celsius.
• East winds at speeds of 15–30 km/h.
• Seas have waves about 1 meter high, but waves exceed 2 meters in areas with thunderstorms.

Bangkok and vicinity

• Thunderstorms cover 60% of the area with some strong gusty winds.
• Lowest temperatures range from 26 to 27 degrees Celsius.
• Highest temperatures range from 33 to 35 degrees Celsius.
• Southeast winds at speeds of 10–20 km/h.