The Seafire LF Mk.III was developed from the previous Seafire Mk.IIc which was a navalized version of a Spitfire Mk. Vc with modifications for carrier operations. France bought 141 Seafire LF Mk.IIIs after the war and they saw combat above Indochina, mostly providing close air support and raiding enemy camps from the sky with ground ordnance.

It was introduced in Update "Winged Lions". Compared to the regular version of the Spitfire, the Seafire has a mediocre climb rate, being slower at accelerating and also having a poor top speed. The engine is the main issue, since it also overheats regularly when using WEP. The 20 mm cannons are prone to jamming and overheating, and it is recommended to quickly research the modifications for the Mk.II 1943 cannons. However, being a Spitfire, the Seafire is still a very capable dogfighter, and it can outperform many aircraft like the P-51s and Bf 109s in similar conditions; however, avoid prolonged fights at all costs, since the Seafire has very poor energy retention.