Taiwan beaches are safe, as long as you swim sober during the day. However, you’ll need to be careful about certain factors such as: - Storm surges: typhoons are common in Taiwan and affect wave behavior even after they have passed - Currents: strong currents come from large rocks popping out of the ocean, which can take you away if you try to swim against the current - Shore breaks on the eastern coast: water is immediately deep and can drag you into sharp rocks You will want to consult with locals around the beaches to see whether the water is fine to swim in. Otherwise, it’s safe to stroll the beaches in Taiwan. Regarding water quality, according to Taiwan’s EPA, it’s safe to swim in beach water under most weather conditions.