The department also advised all ships to proceed with caution as waves in the gulf will be above 2 metres during thundershowers.
Here’s the weather forecast for the next 24 hours:
North: Hot day with thundershowers in 20 per cent of the area; gusty winds are possible in some areas; temperature lows of 25-27 degrees and highs of 35-39 degrees Celsius.
Northeast: Mostly cloudy with thundershowers in 70 per cent of the area and isolated heavy rains; temperature lows of 24-27 degrees and highs of 34-36 degrees Celsius.
Central: Mostly cloudy with thundershowers in 40 per cent of the area; temperature lows of 25-28 degrees, highs of 33-37 degrees Celsius.
East: Mostly cloudy with thundershowers in 70 per cent of the area; temperature lows of 25-28 degrees, highs of 32-36 degrees Celsius; waves 1-2 metres high and 2 metres during thundershowers.
South (east coast): Mostly cloudy with thundershowers in 60 per cent of the area and isolated heavy rains; temperature lows of 25-26 degrees, highs of 34-35 degrees Celsius; waves 1-2 metres high and 2 metres during thundershowers.
South (west coast): Mostly cloudy with thundershowers in 70 per cent of the area and isolated heavy rains; temperature lows of 22-25 degrees, highs of 31-32 degrees Celsius; waves 2 metres high and over 2 metres during thundershowers.
Bangkok and surrounding areas: Mostly cloudy with thundershowers in 30 per cent of the area; temperature lows of 27-29 degrees, highs of 34-37 degrees Celsius.