In May, Swansea typically sees daytime highs of 14.3°C and overnight lows around 8.1°C. Compared to the annual average high of 12.3°C, May runs +2.0°C.
May in Swansea averages a daytime high of 14.3°C and an overnight low of 8.1°C.
May runs +2.0°C compared to Swansea's annual average high of 12.3°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 14.3°C and cooler evenings around 8.1°C.