Terceira is part of Portugal and the Schengen Area. Many travelers can enter visa-free for short stays under Schengen rules, but requirements depend on nationality. Keep a passport that meets Schengen validity rules.
The EU is rolling out new border systems and authorizations. The Entry/Exit System (EES) begins phased implementation from October 2025 for non-EU travelers, and ETIAS is expected to start in late 2026. Check official EU guidance before travel.
For diving, bring your certification card(s) and dive insurance documentation. Operators may request proof for advanced sites.