"The Meteorological Department" Revealed today's weather on 22 May 2026: rainfall in Thailand has decreased but heavy rain still occurs in some areas, potentially causing flash floods and mountain runoff floods.

Date: 22 May 2026The Meteorological Department's websiteThe 24-hour weather forecast states that rainfall in Thailand has decreased but heavy rain remains in some areas, mainly in the western and eastern regions, due to the weakening southwest monsoon covering the upper Andaman Sea and Thailand, combined with a low-pressure trough over northern Vietnam.

The public is advised to be cautious of dangers from heavy and accumulated rainfall, which may cause flash floods and mountain runoff floods, especially in foothill areas near waterways and lowlands. People should also take care of their health during changing weather conditions.

Waves and winds in the Andaman Sea and Gulf of Thailand have weakened. The upper Andaman Sea has waves about 2 meters high, while the lower Andaman Sea and upper Gulf of Thailand have waves 1-2 meters high. In areas with thunderstorms, waves exceed 2 meters. Fishermen in these areas should navigate carefully and avoid sailing during thunderstorms.

Weather forecast for Thailand from 06:00 today until 06:00 tomorrow

Northern region

Thunderstorms cover 60% of the area with heavy rain in provinces including Mae Hong Son, Chiang Mai, Lamphun, Tak, Kamphaeng Phet, Phichit, Phitsanulok, and Phetchabun.

Lowest temperatures 23-25°C / Highest temperatures 32-37°C

Southwest winds at 10-20 km/h

Northeastern region

Thunderstorms cover 40% of the area with heavy rain in provinces including Loei, Nong Khai, Bueng Kan, Chaiyaphum, and Nakhon Ratchasima.

Lowest temperatures 23-24°C / Highest temperatures 33-35°C

Southwest winds at 10-20 km/h

Central region

Thunderstorms cover 70% of the area with heavy rain in provinces including Nakhon Sawan, Saraburi, Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Songkhram, and Samut Sakhon.

Lowest temperatures 24-26°C / Highest temperatures 33-36°C

Southwest winds at 10-20 km/h

Eastern region

Thunderstorms cover 60% of the area with heavy rain in provinces including Nakhon Nayok, Prachinburi, Chachoengsao, Rayong, Chanthaburi, and Trat.

Lowest temperatures 25-27°C / Highest temperatures 30-33°C

Southwest winds at 20-35 km/h

Seas have waves about 2 meters high; in areas with thunderstorms, waves exceed 2 meters.

Southern region (East Coast)

Thunderstorms cover 60% of the area with heavy rain in provinces including Phetchaburi, Prachuap Khiri Khan, Chumphon, and Surat Thani.

Lowest temperatures 23-26°C / Highest temperatures 32-36°C

Southwest winds at 15-35 km/h

Seas have waves 1-2 meters high; near shore waves about 2 meters; in areas with thunderstorms, waves exceed 2 meters.

Southern region (West Coast)

Thunderstorms cover 70% of the area with heavy rain in provinces including Ranong, Phang Nga, Phuket, and Krabi.

Lowest temperatures 23-25°C / Highest temperatures 32-36°C

From Phuket northward: southwest winds at 20-35 km/h.

Seas have waves about 2 meters high; in areas with thunderstorms, waves exceed 2 meters.

From Krabi southward: southwest winds at 15-35 km/h.

Seas have waves 1-2 meters high; in areas with thunderstorms, waves exceed 2 meters.

Bangkok and surrounding areas

Thunderstorms cover 60% of the area with heavy rain in some places.

Lowest temperatures 26-27°C / Highest temperatures 34-36°C

Southwest winds at 10-20 km/h

Source: The Meteorological Department's website

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