Great Welsh Marathon
Race Day Weather
Cool temps, moderate winds
Runners will face a steady temperature increase from 54°F at the start to 57°F at the finish. With a maximum wind of 14 mph from the SSW, pacing adjustments may be necessary, especially in gusty sections. The high humidity at 77% suggests a conservative start to maintain stamina throughout the race.
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Race Info
The Great Welsh Marathon moves to Swansea for its 2027 edition on Sunday 17 October 2027, after more than ten years in Carmarthenshire. The 26.2-mile course is planned as a single loop that starts and finishes in the city and runs along Swansea Bay, with the full route due to be announced in November 2026. It is organised by Front Runner Events and targets 7,500 runners. Source
