Coast, Santo Isidoro, Grande Lisboa. We calculate high and low water here from an ocean tide model — accurate to about 5 cm on open coasts, considerably less in tidal flats and river mouths. Under the EU Bathing Water Directive the water quality in the 2025 season was classified as excellent.
Under the EU Bathing Water Directive the water quality in the 2025 season was classified as excellent.
Water temperature 16.4 °C — NOAA Geo-Polar Blended (5 km), measured 19/09/2026 13:00.
Low tide at 18:33, High tide at 00:43 (Local time at the spot).
Swimming spots in Santo Isidoro · Grande Lisboa · Swimming spots in Portugal · Atlantic Ocean · On the map