October in Port Arthur averages a daily high of 27.7°C with nights around 16.2°C. Expect roughly 7.4 wet days totalling 128mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Port Arthur is February–April.
Based on PORT ARTHUR SE TX REGIONAL AIRPORT, TX US (11km), 1995–2024. 30 years of October data.