March is a popular month to ask about Praia de Sao Martinho do Porto because conditions can shift week to week along this coast. Expect the water near 15.0°C, with daily variation from wind, tides and recent storms. We refresh the live value from Open-Meteo Marine every hour, so the headline above always reflects the current state of the Atlantic Ocean.
Praia de Sao Martinho do Porto sea temperature in March — averages 15.0°C
The sea at Praia de Sao Martinho do Porto in Portugal averages 15.0°C during March, based on long-run climatology for the Atlantic Ocean. Use the live reading below for today's actual water and the monthly grid to compare with the rest of the year.
Average sea · March
15.0°C
mild · Fair
Live water now
…
Recommended wetsuit
4/3mm fullsuit
At 15.0°C you need a 4/3mm fullsuit, and many surfers add neoprene boots.
Monthly comparison
Cool — short dips or a shorty wetsuit · Praia de Sao Martinho do Porto
Can you swim at Praia de Sao Martinho do Porto in July? — 20.0°C water20.0°CCan you swim at Praia de Sao Martinho do Porto in August? — 21.0°C water21.0°CCan you swim at Praia de Sao Martinho do Porto in September? — 21.0°C water21.0°CCan you swim at Praia de Sao Martinho do Porto in October? — 19.0°C water19.0°CCan you swim at Praia de Sao Martinho do Porto in November? — 18.0°C water18.0°CCan you swim at Praia de Sao Martinho do Porto in December? — 16.0°C water16.0°C
Frequently asked questions
What is the average sea temperature at Praia de Sao Martinho do Porto in March?
Praia de Sao Martinho do Porto averages 15.0°C in March, based on long-run climatology for the Atlantic Ocean.
Is the sea warm enough to swim at Praia de Sao Martinho do Porto in March?
Not without thermal protection — a wetsuit is recommended at 15.0°C.
Do I need a wetsuit at Praia de Sao Martinho do Porto in March?
A 3/2 mm wetsuit makes longer swims comfortable.
Compare Praia de Sao Martinho do Porto with nearby beaches
Praia de Sao Martinho do Porto vs Praia de Salir do PortoPraia de Sao Martinho do Porto vs Praia da Foz do ArelhoPraia de Sao Martinho do Porto vs Praia de NazaréPraia de Sao Martinho do Porto vs Praia do NortePraia de Sao Martinho do Porto vs Praia de NazarePraia de Sao Martinho do Porto vs Praia do Norte Nazare