Praia de São Jacinto sea temperature
Sea-surface temperature for Praia de São Jacinto, Portugal, with the 7-day outlook and what to wear.
What is the sea temperature at Praia de São Jacinto today? (3 Sept)
The sea at Praia de São Jacinto is 19.6 °C today. Most people want a shorty, especially once the wind picks up. The sea and the air are within a degree or so of each other.
Praia de São Jacinto sea temperature — next 7 days
Sea temperature is cooling across the week, by about 1.2 °C from start to end.
| Date | Sea temp | Range | Suggested wetsuit |
|---|---|---|---|
| Thu 3 Septtoday | 19.9 °C | 19.5–20.3 °C | 2 mm shorty or spring suit |
| Fri 4 Sept | 20.0 °C | 19.7–20.2 °C | 2 mm shorty or spring suit |
| Sat 5 Sept | 20.0 °C | 19.7–20.3 °C | 2 mm shorty or spring suit |
| Sun 6 Sept | 19.8 °C | 19.6–20.0 °C | 2 mm shorty or spring suit |
| Mon 7 Sept | 19.5 °C | 19.2–19.7 °C | 2 mm shorty or spring suit |
| Tue 8 Sept | 19.1 °C | 18.8–19.3 °C | 2 mm shorty or spring suit |
| Wed 9 Sept | 18.7 °C | 18.4–19.0 °C | 3/2 mm full suit |
Figures are modelled sea-surface temperature, not readings from a buoy or a thermometer in the shallows — expect a degree either way, and more in a shallow bay on a hot afternoon. Wetsuit suggestions are general guidance: cold tolerance varies a lot between people, and wind, session length and air temperature matter as much as the water does.
What wetsuit for what sea temperature?
| Sea temperature | Wetsuit | Extras |
|---|---|---|
| 24 °C and above | Boardshorts or swimsuit | — |
| 22–24 °C | Rash vest or 1 mm top | — |
| 19–22 °CPraia de São Jacinto today | 2 mm shorty or spring suit | — |
| 17–19 °C | 3/2 mm full suit | — |
| 14–17 °C | 4/3 mm full suit | boots on longer sessions |
| 11–14 °C | 5/4 mm full suit | boots and gloves |
| 7–11 °C | 5/4/3 mm hooded full suit | boots and gloves |
| Below 7 °C | 6/5 mm hooded full suit | thick boots and gloves |
Conditions at Praia de São Jacinto
Water temperature is one input. For wave height, wind and a 0–100 score per sport and ability level, see the full forecast.
Frequently asked questions.
What is the sea temperature at Praia de São Jacinto today?
The sea at Praia de São Jacinto, Portugal is 19.6 °C today. This is modelled sea-surface temperature rather than a buoy reading, so allow a degree either way.
What wetsuit do I need at Praia de São Jacinto?
At 19.6 °C, 2 mm shorty or spring suit is the usual choice at Praia de São Jacinto. Most people want a shorty, especially once the wind picks up. Cold tolerance varies, and wind and session length matter as much as the water temperature.
Is the sea warm enough to swim at Praia de São Jacinto?
At 19.6 °C the sea at Praia de São Jacinto is swimmable but brisk — fine for a short swim, and most people want a wetsuit for longer.
How much does the sea temperature at Praia de São Jacinto change over a week?
Over the next 7 days the sea at Praia de São Jacinto stays between 18.4 °C and 20.3 °C. Open water changes temperature slowly, so it rarely moves much inside a week — seasonal change is what matters.
