
Thailand officially entered the rainy season on May 15, as the southwest monsoon strengthened over the Andaman Sea and the Gulf of Thailand. Meteorological authorities are warning of more frequent thunderstorms and heavy downpours, particularly during afternoons and evenings, with localized flooding risks in several regions including Pattaya. Residents have raised concerns about recurring flooding during heavy rain, with storms often causing water accumulation and traffic disruption in parts of the city. Waves in the upper Gulf of Thailand are forecast to reach around 2 meters and higher during storms, with boat operators advised to avoid going to sea during thunderstorms. Authorities are urging the public to monitor weather updates closely and remain alert in flood-prone and low-lying areas.