General Situation
29 May 2025
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Weather Map
The monsoon through lies across the North and the Northeast while the moderate southwest monsoon prevails over the Andaman Sea, the South and the Gulf with isolated heavy in the upper country and isolated very heavy rains are likely in the North and the Northeast. People in the country should beware of heavy to very heavy rains and accumulation that may cause flash floods and overflows, especially along the waterways near foothills and lowlands. Farmers should prepare by improving drainage systems in their agricultural areas to mitigate the potential impacts and damage to crops and livestock. The rather strong wind forces the waves in the upper Andaman Sea up to about 2 meters high while 1-2 meters high in the lower Andaman Sea and above 2 meters high in thundershowers. All ships in the Andaman Sea and the Gulf should proceed with caution and keep off thundershowers. Small boats in the upper Andaman Sea should keep ashore. In addition, during 29 – 30 May, the active low pressure cell over the upper Bay of Bengal will intensify and move near the coast of Bangladesh and India with no direct effect to Thailand.
Bangkok Metropolis and Vicinity Forecast
06:00 Today - 06:00 TomorrowFairly widespread thundershowers and isolated heavy rains. Minimum temperature 26-28 °C. Maximum temperature 33-35 °C. Southwesterly winds 10-20 km./hr.
Announcement Date 29 May 2025
Weather Province Additional
7 days Weather Forecast
During 28 May – 3 June 2025Forecast
During 28 - 30 May, the weakening monsoon trough will lies across the North, the upper Northeast of Thailand and Laos with isolated heavy rains are likely in the upper country and isolated very heavy rains are likely in the North. The moderate southwest monsoon prevails across the Andaman Sea, the South and the Gulf. The wind and waves in the upper Andaman Sea up to 2 meters high, the lower Andaman Sea are likely 1 – 2 meters high, the Gulf are likely about 1 meter high and above 2 meters high in thundershowers During 31 May – 3 Jun, the southwest monsoon prevailing over the Andaman Sea, Thailand and the Gulf will weaken while the low pressure will cover over upper Vietnam. Less rain with isolated heavy rain are forecast over the country. The wind and waves in the upper Andaman Sea up to 1 - 2 meters high, the lower Andaman Sea are likely about 1 meter high, the Gulf are likely about 1 meter high and above 2 meters high in thundershowers. In addition, during 28 – 30 May, the active low pressure cell over the upper Bay of Bengal will intensify and move near the coast of Bangladesh and India with no direct effect to Thailand.
Caution
During 28 – 29 May, people in the North should beware of heavy rains and accumulation that may cause flash floods and overflows, especially along the waterways near foothills and lowlands. Farmers should prevent for crops damage.
All ships in the Andaman Sea and the Gulf should proceed with caution and keep off thundershowers throughout the period.
During 28 – 29 May, Small boats in the upper Andaman Sea should keep ashore.
Announcement Date 28 May 2025
7 day Weather Summary
19 May 2025 - 25 May 2025Forecast
The southwest monsoon prevailed over the Andaman Sea and western of Thailand accompanied with the southeasterly and southerly winds prevailed over the lower northern, northeastern, central, eastern regions and the Gulf of Thailand in the first half of the week. For the second half of the week, the southwest monsoon blew over the Andaman Sea, Thailand and the Gulf of Thailand was strengthened. Additionally, the monsoon trough lay across upper Thailand before moving southward to lie over lower central, eastern and upper southern parts on the last day of the week. These conditions caused plentiful rainfall in upper Thailand particularly heavy to very heavy rainfall in several areas in the second half of the week, accompanied by flooding in some places. Meanwhile, the southern region experienced abundant rainfall mainly along the west coast particularly in the second half of the week.
Announcement Date 26 May 2025
Previous
Monthly Weather Forecast
November 2022Forecast
Upper Thailand will be more cold especially the northern and northeastern regions with some thunderstorms on certain days. For the mountain tops, mountain peaks, and mountain ranges, the weather is generally cold. This is because The high pressure area from China will extend to cover the North and Northeast periodically. It will be mostly moderate power. the southern part It continues to rain heavily. especially the east coast from Chumphon down There are still thunderstorms in 60 - 80 percent of the area with heavy rain in many areas and very heavy in some places.This will cause flash floods and flash floods, as well as overflowing riverbanks in some places. For wind waves in the Gulf of Thailand will be strong. In some periods, there will be waves 2 - 4 meters high, while the Andaman Sea will have 1-2 meters high because the northeast monsoon still prevails over the Gulf of Thailand and the South. It will have strength from time to time. In addition, there will be a monsoon trough that lies across the central South in some periods. In addition, in some periods there will be an active low pressure cell moving closer. and has a high chance of moving through the southern region
Caution
In summary, this month, the total rainfall in the northern and northeastern regions is expected to be 10% less than normal, and the central and eastern regions are close to normal. The southern region is 10 percent above normal, while the average landscape is still slightly above normal.
Announcement Date 01 November 2022