Google Pixel Watch 5 Prototype Found on Caribbean Seabed — Reveals 45mm Size, UWB, and New Sensors

In what may be the strangest tech leak of 2026, an unreleased Google Pixel Watch 5 prototype has been recovered from the Caribbean seabed near St. Martin. Gearbox Software co-founder Randy Pitchford shared photos of the device on May 31 after a friend discovered it during a scuba dive.

What the Prototype Reveals

• Size: 45mm case — confirming Google is offering a larger model again
• Connectivity: UWB (Ultra Wideband) for precise device tracking and car key support
• Sensors: Heart rate, EDA (electrodermal activity), SpO2, and sleep tracking
• Durability: IP68 water resistance — the device survived an extended ocean stay and still displayed the correct time

Rumored Internal Specs

Separate leaks suggest the Pixel Watch 5 will ditch Qualcomm's Snapdragon Wear chips for a custom Google Tensor wearable chip built on TSMC's 3nm process with Cortex-A78 and A55 cores. It is expected to run Wear OS 7 with deeper Gemini AI integration.

What This Means for Buyers

The Pixel Watch 5 is expected to launch alongside the Pixel 11 in August 2026. If you're considering a Pixel Watch 3 at $247, the upgrade path looks compelling with a custom chip and expanded sensors. For buyers who can't wait, the current Pixel Watch 3 at its discounted price remains a strong value. Compare all smartwatches in our smartwatch guide.