Daily Weather Forecast
15 September 2025Announcement Date 15 September 2025
Forecast Additional Video Formats
General Situation
15 Sep 2025
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Weather Map
The monsoon through moves down to lie across the Central, the upper South and the East into the active low pressure cell over the South China Sea with the southeasterly wind prevails over the lower Northeast, the East and the upper Gulf while the moderate southwest monsoon prevails over the Andaman Sea, the South and the Gulf.
Isolated heavy rain remains in the lower Northeast, the Central including Bangkok and vicinity, the East and the South. People in the areas especially of the South should beware of heavy rains and its accumulation that may cause flash flood and overflows, especially along foothills near waterways and lowlands.
The wind and waves in the upper Andaman Sea are expected 1-2 meters high and above 2 meters high in thundershowers. In the lower Andaman Sea and the Gulf, the waves are expected about 1 meter high and above 2 meters high in thundershowers. All ships should proceed with caution and keep off thundershowers.
Bangkok Metropolis and Vicinity Forecast
06:00 Today - 06:00 TomorrowFairly widespread thundershowers and isolated heavy rain. Minimum temperature 25-26 °C. Maximum temperature 31-33 °C. Variable winds 10-15 km/hr.
Announcement Date 15 September 2025
Weather Province Additional
7 days Weather Forecast
During 15 – 21 Sep 2025Forecast
Forecast: During 15 – 16 Sep, the monsoon through lies across the lower North, the Cental, the East and the lower Northeast into the active low pressure cell over the South China Sea while the southwest monsoon prevails over the Andaman Sea, the South and the Gulf with isolated heavy rains are likely in the lower Northeast, the Central including Bangkok and vicinity and the South. The moderated wind and waves in the upper Andaman Sea are likely 1 - 2 meters high, about 1 meter high in the lower Andaman Sea and the upper Gulf and above 2 meters high in thundershowers. During 17 – 21 Sep, the monsoon trough lie across the lower North, the Cental, the East and the lower Northeast while the southwest monsoon prevailing over the Andaman Sea, the South and the Gulf will strengthen. Isolated heavy rains are likely in the country while isolated very heavy rains are possible in the East and the South (west coast). The moderate wind and waves in the upper Andaman Sea are likely about 2 meters high, 1 - 2 meters high in the lower Andaman Sea and the upper Gulf and above 2 meters high in thundershowers. In addtion, an active low-pressure cell over the South China Sea is expected to move closer to the coast of Vietnam.
Caution
During 17 – 19 Sep, people in the East and the South (west coast) should beware of heavy to very heavy rains and its accumulation that may cause flash flood and overflows, especially along the waterways near foothills and lowlands.
All ships in the Andaman Sea and the Gulf should proceed with caution and keep off thundershowers throughout the period.
Announcement Date 15 Sep 2025
7 day Weather Summary
5 September 2025 - 11 September 2025Forecast
The monsoon trough lay across the lower northern, upper central and northeastern regions in the first half of the period after that it moved to lie across the northern and upper northeastern regions before shifting northward to lie across the upper northern Thailand and upper Laos on the last day of period. Additionally, the moderate southwest monsoon prevailed over the Andaman Sea, Thailand, and the Gulf of Thailand throughout the period. These conditions brought abundant rainfall over upper Thailand, with heavy to very heavy rainfall reported in some areas almost the period, inducing flooding in some places. In the southern region, rainfall occurred almost the entire period, especially along the west coast.
Meanwhile, Typhoon “TAPAH (2516)” over the upper South China Sea made landfall over Guangdong, China at 10:00 a.m. on 8 Sep. It subsequently weakened into the tropical storm and later into the tropical depression and active low-pressure cell over southern China in the evening of the same day. This storm strengthened the southwest monsoon which prevailed over the Andaman Sea, Thailand, and the Gulf of Thailand.
Announcement Date 12 Sep 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
