September in Gulfport averages a daily high of 31°C with nights around 21.6°C. Expect roughly 9.2 wet days totalling 138mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Gulfport is March–May.
Based on GULFPORT BILOXI AIRPORT, MS US (5.1km), 1995–2024. 26 years of September data.