The 2026 Formula Winter Series was the fourth season of the Formula Winter Series. It was a multi-event motor racing championship for open-wheel, formula racing cars regulated according to Formula 4 regulations by the Fédération Internationale de l'Automobile (FIA), and was organised by Gedlich Racing.
The championship consisted of five rounds in Portugal and Spain, beginning on 24 January at Circuito do Estoril and ending on 15 March at Circuit de Barcelona-Catalunya. The rookies' championship featured a separate classification for the first time, rather than the title being awarded to the highest-placed rookie in the drivers' championship.
The calendar expanded from four rounds in previous seasons to five rounds in 2026. The season opener was half at Circuito do Estoril, the series' first visit to the track. All rounds supported the GT Winter Series.
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Points are awarded to the top-10 classified drivers; the highest-placed driver in each qualifying session, which set the grids for races one and three, respectively; and the fastest lap holder, as follows:
Drivers are deducted 10 points for any technical disqualifications. The grids for race two are set by each driver's second-fastest lap time in qualifying one.
Points are awarded as they are in the overall championship, with all non-rookie drivers removed from the classification; pole positions and fastest laps are not counted.
Each team's two highest-classified drivers in each race score points for the teams' championship; pole positions and fastest laps are not counted.