Cardiff Half Marathon
Race Day Weather
Mild temps, variable winds ahead
Runners will face temperatures starting at 57°F and peaking at 60°F, with humidity at 77%. Winds will be a factor, beginning with a headwind in Mile 1, transitioning to tailwinds in Miles 5 and 9, and returning to headwinds in the final stretch. To navigate these conditions, runners should adjust their pacing strategy accordingly, particularly during the exposed segments.
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Race Info
The Cardiff Half Marathon is held on a Sunday in early October in Cardiff, Wales, and carries a World Athletics Elite Label. The course starts on Castle Street outside Cardiff Castle, runs past the Principality Stadium and Cardiff City Stadium to Penarth Marina and the Cardiff Bay barrage, passes the Senedd and Wales Millennium Centre, then loops Roath Park Lake before finishing on King Edward VII Avenue in the Civic Centre. Cardiff hosted the 2016 IAAF World Half Marathon Championships, and the course records are 59:22 for men (Yismaw Dillu, 2025) and 1:05:40 for women (Joyciline Jepkosgei, 2026).
