Atlantic

Region: about 100 nautical miles of Algarve coast from the Guadiana to Cape St Vincent, then 120 miles north to Lisbon

Region: seven main islands running about 250 nautical miles, between 60 and 250 miles off the Moroccan and Saharan coast

La Rochelle average spring tidal range: 5.3 m, with a maximum recorded high of 7.2 m; near Ile de Re the range can reach up to 6 m with currents exceeding 3 knots at springs