Porto Santo Water Temperature
Updated Tue 14:53 (Atlantic/Madeira)
Portugal · Forecast updated Sep 22, 2026, 14:53 UTC
Current Sea Temperature
24.3°C
75.7°F
Mild water
Valid Sep 22, 2026, 14:53 (Atlantic/Madeira). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.4°C above
The typical September average is 23.9°C (75.0°F) from the historical baseline.
Recent trend
Holding fairly steady
Seven-day average: 24.3°C, versus 24.3°C in the prior seven days.
What to wear
Mild water
A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions or replace the snorkel forecast.
Typical Sea Temperature Over the Year
In the historical baseline for Porto Santo, typical monthly averages range from about 18.8°C (65.8°F) in March to 23.9°C (75.0°F) in August.
Over the past 30 days, the average sea temperature in Porto Santo has been 24.3°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Porto Santo, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 19.6–20.7°C | 20.0°C / 68.0°F |
| February | 18.2–19.7°C | 19.0°C / 66.2°F |
| March | 18.3–19.0°C | 18.8°C / 65.8°F |
| April | 18.5–19.6°C | 19.2°C / 66.6°F |
| May | 19.5–20.4°C | 20.0°C / 68.0°F |
| June | 20.8–21.8°C | 21.3°C / 70.3°F |
| July | 22.5–23.2°C | 22.9°C / 73.2°F |
| August | 23.4–24.3°C | 23.9°C / 75.0°F |
| September | 23.5–24.4°C | 23.9°C / 75.0°F |
| October | 23.0–24.4°C | 23.7°C / 74.7°F |
| November | 22.1–23.0°C | 22.5°C / 72.5°F |
| December | 20.1–21.7°C | 20.9°C / 69.6°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (33.04, -16.37). Each month is the mean of yearly monthly means; the range is the lowest and highest of those yearly monthly means. Open-Meteo methodology.
Water temperature by month
Each month uses the 2023–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Porto Santo in January
Typical January water temperature near Porto Santo is 20.0°C (68.0°F), with yearly monthly means from 19.6–20.7°C.
Porto Santo in February
Typical February water temperature near Porto Santo is 19.0°C (66.2°F), with yearly monthly means from 18.2–19.7°C.
Porto Santo in March
Typical March water temperature near Porto Santo is 18.8°C (65.8°F), with yearly monthly means from 18.3–19.0°C.
Porto Santo in April
Typical April water temperature near Porto Santo is 19.2°C (66.6°F), with yearly monthly means from 18.5–19.6°C.
Porto Santo in May
Typical May water temperature near Porto Santo is 20.0°C (68.0°F), with yearly monthly means from 19.5–20.4°C.
Porto Santo in June
Typical June water temperature near Porto Santo is 21.3°C (70.3°F), with yearly monthly means from 20.8–21.8°C.
Porto Santo in July
Typical July water temperature near Porto Santo is 22.9°C (73.2°F), with yearly monthly means from 22.5–23.2°C.
Porto Santo in August
Typical August water temperature near Porto Santo is 23.9°C (75.0°F), with yearly monthly means from 23.4–24.3°C.
Porto Santo in September
Typical September water temperature near Porto Santo is 23.9°C (75.0°F), with yearly monthly means from 23.5–24.4°C.
Porto Santo in October
Typical October water temperature near Porto Santo is 23.7°C (74.7°F), with yearly monthly means from 23.0–24.4°C.
Porto Santo in November
Typical November water temperature near Porto Santo is 22.5°C (72.5°F), with yearly monthly means from 22.1–23.0°C.
Porto Santo in December
Typical December water temperature near Porto Santo is 20.9°C (69.6°F), with yearly monthly means from 20.1–21.7°C.
Forecast archive (growing)
These values come from hourly forecasts SnorkelForecast has stored. They cover only months with records and do not replace the historical baseline.
| Month | Min | Average | Max |
|---|---|---|---|
| June | 19.6°C / 67.3°F | 20.9°C / 69.6°F | 22.7°C / 72.9°F |
| July | 21.6°C / 70.9°F | 22.9°C / 73.3°F | 24.0°C / 75.2°F |
| August | 23.1°C / 73.6°F | 24.5°C / 76.1°F | 25.4°C / 77.7°F |
| September | 23.8°C / 74.8°F | 24.2°C / 75.6°F | 24.9°C / 76.8°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2734 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Porto Santo
Golden-sand island near Madeira with calm, clear Atlantic shallows.
- Area
- Madeira
Porto Santo Water Temperature: Common Questions
What is the water temperature in Porto Santo today?
The current sea surface temperature near Porto Santo is 24.3°C (75.7°F). Over the last 30 days, the average has been 24.3°C.
When is the water warmest in Porto Santo?
The water is typically warmest in August, at around 23.9°C (75.0°F) in the 2023–2025 historical baseline.
When is the water coldest in Porto Santo?
The water is typically coldest in March, at around 18.8°C (65.8°F) in the same historical baseline. A wetsuit is usually recommended during this period.
Can you swim in Porto Santo today?
At 24.3°C, the water is usually comfortable for swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Porto Santo.
View Snorkel Forecast →