Thailand is under a nationwide weather alert as heavy rain, thunderstorms, and gusty winds are expected to batter more than 30 provinces. The Thai Meteorological Department (TMD) has warned that the stormy conditions are likely to affect key tourist destinations and major coastal zones.
What’s Driving the Unsettled Weather?
A strong monsoon trough stretching across central and eastern parts of the country, combined with a low-pressure cell off the coast of Vietnam, is feeding unstable weather conditions. At the same time, a weakening high-pressure system over northern Thailand is contributing to cooler morning air and increased cloud build-up. These atmospheric factors are working together to drive widespread thunderstorms and heavy downpours throughout the country.
Northern Region: Cool Mornings, Risk of Flash Floods
In northern provinces such as Mae Hong Son, Tak, Sukhothai and others, the mornings will bring cooler air with temperatures starting from 21 °C to 24 °C. In the afternoon, it will rise to 28 °C–32 °C. Mountain areas may even drop to 10 °C–14 °C. Expect southeast winds of 10–15 km/h and afternoon thunderstorms with heavy rain and risk of flash flooding, especially in valleys and low-lying terrain.
Northeast: Scattered Storms With Daytime Heat
The northeastern region, including provinces like Mukdahan, Yasothon, Amnat Charoen and Ubon Ratchathani, faces sporadic rainfall. Morning lows will range from 21 °C–24 °C, climbing to 28 °C–31 °C by midday. Higher elevation zones may dip to 14 °C–18 °C overnight. East winds at 10–20 km/h will bring some relief from the heat, but the scattered thunderstorms may still disrupt travel and outdoor plans.
Central Thailand & Bangkok: High Risk Zone
The central plains and the capital region are expected to bear the brunt of the storm system. Around 70 % of this region could face thunderstorms and heavy rain, including provinces such as Nakhon Sawan, Uthai Thani, Suphan Buri, Ayutthaya and others. In Bangkok, rain is expected to hit about 70 % of the city. Temperatures in the morning will fall between 22 °C and 24 °C, while afternoons will feel humid at 30 °C–32 °C. Winds blowing at 10–20 km/h will carry moisture, making conditions feel sticky and uncomfortable.
Eastern Coast & Marine Travel: Rough Waters Ahead
Tourist-friendly coastal provinces such as Rayong, Chanthaburi and Trat will see storms covering up to 70 % of the area. Waters will be choppy – typical wave heights around 1 metre may surge above 2 metres during thunderstorms. Temperatures will move from morning lows of 24 °C–25 °C to highs of 30 °C–33 °C. Sea travel, especially with smaller craft, may be hazardous, and visitors should monitor marine conditions closely.
Southern Regions: East and West Coasts Face Storm Threats
On the east coast of southern Thailand – including Phetchaburi, Prachuap Khiri Khan, Pattani, Yala and Narathiwat – 60 % of the area may experience storms. Morning temperatures will hover between 23 °C and 25 °C, rising to 30 °C–34 °C in the afternoon. West coast provinces like Ranong and Phang Nga face similar threats with winds of 15–35 km/h and waves between 1–2 metres, rising above 2 metres in stormy offshore zones. Tourists planning beach days, boat trips or marine activities should reconsider for safety.
Travel Tips for Tourists
- Check daily weather updates and act on warnings from local authorities.
- Avoid low-lying areas and riverbanks where flash floods may form quickly.
- For coastal travel or boat rides, verify sea conditions and postpone if waves exceed safe limits.
- If staying in mountainous or rural regions, secure accommodation and avoid trekking during heavy rain.
- Keep luggage and gear waterproofed; unexpected downpours can last for hours.
- Maintain flexible travel plans: flights, ferries and inter-province travel may face delays or cancellations.
What this Means for Tourism
Major tourist hubs across Thailand, including Bangkok, coastal zones and northern mountain destinations, are facing unstable weather. Some outdoor attractions may be closed or inaccessible; delays and disruptions are likely. Tourists must prioritise safety over sightseeing. Adjusting itineraries, choosing indoor options and monitoring storms will help keep the holiday on track.
Final Word
Thailand’s weather alert underlines the urgent need for caution. Heavy rainfall, strong winds, flash-flood potential and rough seas could affect many travellers. Staying informed, avoiding high-risk zones and preparing for sudden weather changes will help ensure a safer experience during this stormy period.
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