2013 FIA World Endurance Championship season

The 2013 FIA World Endurance Championship season was the second season of the FIA World Endurance Championship auto racing series, co-organized by the Fédération Internationale de l'Automobile (FIA) and the Automobile Club de l'Ouest (ACO). The series was open to Le Mans Prototypes and grand tourer-style racing cars meeting four ACO categories. World Championships were awarded to drivers and to LMP1 category manufacturers, and several World Cups and Endurance Trophies were awarded for the series' other categories. The eight race championship began in April at the Silverstone Circuit and ended in November at the Bahrain International Circuit. The season was marred by the death of Allan Simonsen in the 24 Hours of Le Mans.

An initial calendar was published by the FIA World Motor Sports Council on 28 September 2012. Seven of the eight races on the schedule are carried over from 2012, although several events have had their dates changed. The 6 Hours of Silverstone now begins the season in April before Spa in May and the 24 Hours of Le Mans in June. In order to save costs and utilize shipping by sea instead of air, the non-European events have all been grouped at the end of the season. São Paulo remains as the first post-European event, while the new 6 Hours of Circuit of the Americas replaces the 12 Hours of Sebring as the American round of the series. Fuji and Shanghai are moved forward on the calendar, leaving Bahrain to now close the season in November, allowing cooler temperatures than its September date in 2012.

The Silverstone race weekend was shared with the European Le Mans Series, while the Austin weekend was held in conjunction with the American Le Mans Series, although unlike the 2012 12 Hours of Sebring, both series ran separate races.

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