Heavy Rain in Thailand: Warning for November 9 to November 13

Rain in Thailand is accompanied by a new warning: the Thai Meteorological Department (TMD) reports heavy and in places very heavy rain in the south from November 9 to November 13, which could lead to flash floods and fast-moving currents. For residents and travelers, the main risks come from rainfall accumulating in low-lying areas and near slopes beside waterways, possible landslides, and high waves in thunderstorm areas at sea. When planning trips, you need to distinguish between the daily summary, the period of a separate warning, and the weekly forecast, since they describe different periods and do not mean the same weather in all provinces or across the entire sea area at once. Current as of November 9, 2026.

What We Know

The period from November 9 to November 13 is listed in the Thai Meteorological Department’s warning No. 1. For comparing destinations, see the weather forecast for Thailand’s resorts, but hazardous conditions are described in separate warnings.

Warning No. 15 covers the period from November 8 to November 9. New document No. 1 is a separate warning, not a simple extension of the previous one; the seven-day forecast covers the period from November 8 to November 14.

In the south, the Meteorological Department forecasts prolonged rain: heavy in many areas and very heavy in places. Rainfall accumulation may cause flash floods and fast-moving currents, especially in low-lying areas and near slopes beside waterways; the seven-day forecast also warns of possible landslides.

This refers to a forecast hazard: the warning does not in itself mean that the listed areas are already flooded. The last day of the stated period also does not promise an end to the bad weather.

Heavy Rain in Thailand: Regional Forecast and Sea Conditions

In the summary checked on November 9, the Meteorological Department’s daily forecast for Bangkok and its suburbs indicates thunderstorms over 40% of the area. In the south, rain is expected to intensify, with heavy and very heavy rainfall in places.

For the eastern coast of the south, the regional summary indicates thunderstorms over 70% of the area and heavy rain in places. Very heavy rainfall is forecast in places in the provinces of Nakhon Si Thammarat, Phatthalung, Songkhla, and Pattani.

On the western coast of the south, thunderstorms are also expected over 70% of the area, with heavy rain in places. The list of areas with heavy rainfall names Krabi, Trang, and Satun.

Percentages show the share of the area covered, not the chance of rain at a specific hotel. A province’s absence from the list of heavy rainfall does not mean there is no rain or any guarantee of safety.

A separate weekly forecast for the eastern coast of the south from November 9 to November 13 indicates thunderstorms over 60–70% of the area. This figure refers to the period within the seven-day forecast from November 8 to November 14 and does not replace the daily summary.

In the lower part of the Gulf of Thailand, waves of about 2 meters are forecast, and in thunderstorm areas — above 2 meters. The warning about waves above this level also applies to thunderstorm areas of the Andaman Sea, but such wave heights cannot be assumed across the entire sea area at once.

What to Do

As earlier reported by TTG Europe, boat operators are advised to avoid thunderstorm areas. This is a recommendation for route safety, not a blanket ban on going to sea.

When planning trips by land, keep in mind that the Meteorological Department treats low-lying areas and slopes beside waterways as areas of special risk when rainfall accumulates. For a beach visit, see the additional guide — beach safety in Thailand: a rain forecast and a warning about thunderstorm waves describe different hazards.

Before your trip, check the latest warnings from the Thai Meteorological Department and local authorities: forecasts and conditions may change.