Winters in Seixal are mild, with temperatures ranging from -4°C to 18°C, averaging around 10°C. As the year progresses into spring, temperatures gradually warm up, reaching averages of 16°C by April and 19°C by June. Summer months bring warmer days, with July being the hottest month, averaging 21°C, but still relatively cool compared to other European destinations. Autumn brings a slight cooling, with September and October temperatures averaging around 20°C, before dropping back down to winter levels in November and December. Overall, Seixal's climate is characterized by mild temperatures throughout the year, with minimal temperature extremes.