# Porto Santo water temperature Sea temperature at Porto Santo is 24.4 °C (75.9 °F). - Location: Porto Santo, Portugal - Timezone: Atlantic/Madeira - Source: Open-Meteo marine forecast (snapshot) - Generated at: 2026-09-22T15:53:59.219796+01:00 - Forecast page: https://snorkelforecast.com/portugal/porto-santo/ - HTML sea temperature: https://snorkelforecast.com/portugal/porto-santo/sea-temperature/ - Temperature is not a safety rating or snorkel score. - Guidance: Mild water - What to wear: A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit. ## Monthly baseline - January: 20.0 °C (68.0 °F) - February: 19.0 °C (66.2 °F) - March: 18.8 °C (65.8 °F) - April: 19.2 °C (66.6 °F) - May: 20.0 °C (68.0 °F) - June: 21.3 °C (70.3 °F) - July: 22.9 °C (73.2 °F) - August: 23.9 °C (75.0 °F) - September: 23.9 °C (75.0 °F) - October: 23.7 °C (74.7 °F) - November: 22.5 °C (72.5 °F) - December: 20.9 °C (69.6 °F)