Best answer: No, neither the Samsung Galaxy Z Fold 8 nor the Galaxy Z Fold 8 Ultra are waterproof. Both phones have IP48 certification, meaning they are water-resistant out of the box and can be submerged in up to 1.5 meters of water for up to 30 minutes. However, water resistance is not a permanent condition and will degrade over time.

The '8' in IP48 means both phones meet the highest International Protection level for submersion. Note that your mileage may vary with salt water or chlorinated water, and these phones do not support IPX9, meaning they are not protected against high-temperature or high-pressure water jets.

Keep in mind that water resistance is not a permanent condition. Samsung only guarantees IP48 certification when your device leaves the factory. As the company explains, you can expect the Galaxy Z Fold 8 and Galaxy Z Fold 8 Ultra's water resistance to diminish over time due to wear, damage, or improper handling.

To sum up, the Galaxy Z Fold 8 and Galaxy Z Fold 8 Ultra are highly water-resistant, but this doesn't mean you should rush to use your foldables in the water. Every drop wears down the rubber seals inside your phone, and the seals degrade over time even if kept in perfect condition.