Swansea Weather in September

During September, Swansea experiences pleasant daytime temperatures of 18°C (64°F) and cooler nights around 12°C (54°F). As part of the summer season, expect quite a bit of rainfall. Around 103 mm (4.1 in) is typical.

Rainfall in Swansea in September

You can expect rain on around 16 days based on historical patterns, with 103 mm (4.1 in) average for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Swansea in September

September in Swansea brings typical temperatures with highs around 18°C (64°F) and lows of 12°C (54°F). September is in the summer season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 12°C (54°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Swansea in September

With about 149 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July typically offers the best weather for Swansea.