Written by DiveJourney. Built from public sources and local operator knowledge. Last updated Mar 4, 2026.

• DiveJourney Portugal country guide - Internal destination index and planning structure used for region anchoring.
• IPMA (Portuguese Institute of the Sea and Atmosphere) - Authoritative marine and weather forecasts for Portugal, including sea state and sea surface temperature updates.
• Visit Portugal (official tourism board) - National tourism information and regional travel planning.
• ICNF BerlengasPass - Official controlled-access platform and visitor management for the Berlengas Nature Reserve.
• ICNF (Nature and Forest Conservation Institute) - Portugal's nature conservation authority and protected-area framework.
• Arrabida Marine Park, areas and rules - Zoning and conduct guidance for the Arrabida marine protected area near Sesimbra.
• SIMplifica Madeira (IFCN) - Madeira administrative platform that includes reservation and fee information used for some managed dive points.
• Visit Madeira diving information - Official Madeira tourism information for diving areas and marine reserves.
• Dive Visit Azores - Azores diving portal with guidance on sites, rules, and planning.
• Azores Government environment portal - Regional environmental governance and protected-area information for the Azores.
• International Whaling Commission whale watching handbook, Portugal profile - Country profile including context and references for whale watching management.
• European Commission, Schengen visa policy - Official EU guidance on Schengen short-stay visa policy and rules.
• Gov.pt, European emergency number 112 - Official guidance on using 112 in Portugal.
• Atlanticoline (Azores ferries) - Inter-island ferry operator for the Azores (seasonal routes and schedules).
• Porto Santo Line (Madeira to Porto Santo ferry) - Ferry operator connecting Madeira and Porto Santo (weather and season dependent).
• Diario da Republica (Portugal legal gazette) - Primary source for Portuguese regulations, including protected-area rules and access frameworks referenced by local operators.