The 2025 Heatwave, also promoted as Heatwave: Massachusetts, was a professional wrestling livestreaming event produced by WWE. It was the fourth annual Heatwave produced by the company for its developmental brand NXT, and 11th Heatwave overall. The event took place on August 24, 2025, at the Lowell Memorial Auditorium in Lowell, Massachusetts, and was the first and only Heatwave to solely use the WWE logo as well as be broadcast on Netflix in international markets. This event was also the first Heatwave to feature wrestlers from WWE's partner promotion, Total Nonstop Action Wrestling (TNA). As with its broadcast, The event went head-to-head against All Elite Wrestling's Forbidden Door pay-per-view event.