watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2026-03-24T18:33:34Z. The update package is 59.5 MB. This is a delta (partial) update that requires 5.3.3 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: cf2d7f45d3ec568a127630e41d7ca4cea79901de.zip.