Temperatures in 24 tourism hotspots across Thailand could hit 35-38°C till 24 May 2026

Bangkok temperatures could range between lows of 27-29°C, and highs of 35-36°C over the next three weeks.

Chiang Mai, Kanchanaburi, Koh Samui, Songkhla, Bangkok, and more provinces in Thailand could see temperatures reaching the upper 30s from now till 24 May 2026, according to the Thai Meteorological Department (TMD).

In its four-week forecast shared on 1 May, the Department said Chiang Mai, for instance can expect lows of 23-25°C, and highs of 36-38°C between 4-10 May, with two to four days of rainfall expected. Meanwhile, the Thai capital of Bangkok could experience temperatures ranging between the lows of 26-28°C, and highs of 35-37°C on the same days, with the same number of days of rainfall expected.

Here is the full forecast (translated version follows):

Seven-day forecast

According to TMD's seven-day forecast on 4 May, Upper Thailand is expected to experience increased rainfall with gusty winds in some places, and heavy rain possible in some areas on 5 May and from 8-10 May. This, it said, is due to another wave of high pressure or cold air mass from China, which will spread over the South China Sea, resulting in southeasterly winds blowing over Upper Thailand.

Rainfall in the region will decrease from 6-7 May, but thunderstorms and gusty winds may occur in some places, with hot weather during the day and very hot weather in some high-pressure areas, or those receiving cold air masses from China covering the Northeast.

Meanwhile, the southern region may experience increased rainfall on 5 May, due to the easterly and southeasterly winds. TMD noted that the waves in the Gulf of Thailand are about one-metre high, reaching higher than that in areas with thunderstorms. On that note, the region may also experience heavy rain in some areas between 6-10 May 2026, due to the easterly wind waves blowing over the lower southern region.

Forecast by region

Northern region

On 5 May and 8-10 May, the region will experience hot and very hot weather in some areas with thunderstorms in 20-40% of the area, and gusty winds and hail in some places. Heavy rain is also expected in parts of the region.

The weather is expected to remain hot and very hot from 6-7 May, with thundery showers expected in 10-20% of the area. Gusty southwest winds could occur, with a speed of 5-15 km/h.

Minimum temperature: 21-26°C

Maximum temperature: 33-41°C

Northeast region

From 5-7 May, the region will experience hot weather with thundery showers in 10-30% of the area, an gusty winds in some places. Southerly winds are expected at 10-15 km/h.

From 8-10 May, hot weather will continue, with thundery showers in 30-40% of the area and gusty winds. Heavy rain is expected in some places from 8-9 May, with southeasterly winds expected at 10-20 km/h.

Minimum temperature: 22-26°C

Maximum temperature: 32-38°C

Central region 

On 5 May and from 8-10 May, the region will experience hot weather with thundery showers in 20-40% of the area, along with gusty winds. Heavy rain is expected in some places from 9-10 May, and southeasterly winds are expected at 10-20 km/h.

From 6-7 May, the weather will be hot, and very hot in some areas, with thunderstorms in 10-30% of the area. Strong gusty southerly winds are expected, with speeds of 10-20 km/h.

Minimum temperature: 24-28°C

Maximum temperature: 33-40°C.

Southern region – East Coast 

On 5 May, the weather will be hot during the day, with thunderstorms in 20-40% of the area. Strong gusty southeasterly winds are expected, with speeds of 15-30 km/h.

Sea waves are expected to be about one-metre high, and more than two-metres high in areas with thunderstorms.

Minimum temperature: 23-27°C

Maximum temperature: 33-39°C

Southern region – West Coast 

The weather will be hot during the day on 5 May, with thunderstorms in 30-40% of the area. Easterly winds are expected at 10-30 km/h. Sea waves will be less than one-metre high, and more than one-metre high in areas with thunderstorms.

From 6-10 May, thunderstorms are expected in 40-70% of the area, with heavy rain in some places. Easterly winds are expected at 15-30 km/h.

Sea waves in this period will be about one-metre high, and more than two-metre high in areas with thunderstorms.

Minimum temperature: 24-28°C

Maximum temperature: 33-37°C

Bangkok and Metropolitan Area 

Bangkok and the surrounding areas will experience hot weather with thundery showers in 30-40% of the area on 5 May and from 8-10 May, with gusty winds in some places. Heavy rain is expected from 9-10 May, and southeasterly winds are expected at 10-20 km/h.

The weather will remain hot from 6-7 May, with thundery showers in 10-30% of the area and gusty winds in some places. Southerly winds are expected at 10-20 km/h.

Minimum temperature: 26-29°C

Maximum temperature: 34-37°C

Precautionary measures to note

Individuals in Upper Thailand have been advised to stay alert of the danger of thunderstorms and gusty winds that may occur in some areas on 5 May and between 8-10 May, as well as avoid being in open areas, under large trees, buildings, and unhealthy billboards. Farmers have also been advised to make the necessary preparations neededto prevent damage that may occur to agricultural products and livestock, as well as maintain their health during weather changes.

At the same time, those in the lower south have been advised to remain alert of the danger of heavy rain and accumulated rain from 6-10 May, which may cause flash floods.

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Infographics / TMD