Second Announcement Warns of Heavy to Very Heavy Rain from 28 May to 1 June — Check Affected Provinces

Society27 May 2026 21:15 GMT+7

The Meteorological Department issues its second announcement warning for the period 28 May to 1 June 2026. "Heavy to very heavy rain" across Thailand; check provinces expected to be affected.

27 May 2026The Meteorological Department websiteannounces "Heavy to very heavy rain across Thailand and strong waves in the Andaman Sea." The second announcement, effective from 28 May to 1 June 2026, states that during this period, rainfall will increase across Thailand with heavy rain in many areas and very heavy rain in some locations in the southern region, the eastern region, and the western parts of the northern and central regions.

This is due to the southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand with fairly strong intensity, combined with a monsoon trough passing over upper Thailand. The public in Thailand is advised to prepare and be cautious of dangers from heavy to very heavy rain and accumulated rainfall, which may cause flash floods and landslides, especially in risk-prone areas near waterways and lowlands.

Meanwhile, waves and winds in the Andaman Sea and the Gulf of Thailand will be fairly strong. In the upper Andaman Sea from Phuket Province northward, waves will be 2-3 meters high, and in areas with thunderstorms, waves may exceed 3 meters. In the lower Andaman Sea from Krabi Province southward and in the upper Gulf of Thailand, waves will be about 2 meters high, exceeding 2 meters where thunderstorms occur. Mariners in these areas are advised to navigate with caution and avoid sailing in stormy conditions. Small boats in the upper Andaman Sea should refrain from leaving the shore during this period.

The public is urged to follow announcements from the Meteorological Department and can access information at the Meteorological Department’s website http://www.tmd.go.th or by calling 0-2399-4012-13 and 1182, available 24 hours.