Can I swim at Praia de Sao Juliao right now?

The sea at Praia de Sao Juliao is currently 19.8°C — good swimming conditions. Most swimmers will find the water comfortable when it's above 22°C; below 18°C feels fresh and a wetsuit is recommended.

What will the sea temperature be at Praia de Sao Juliao next week?

Based on long-term July averages and the latest marine model, expect the sea around Praia de Sao Juliao to sit close to 20.0°C over the next 7 days. Check the live 7-day chart above for the exact daily outlook.

When is the best month to swim at Praia de Sao Juliao?

July – August – September are typically the warmest months to swim at Praia de Sao Juliao, with sea temperatures at their seasonal peak.

Do I need a wetsuit at Praia de Sao Juliao?

With water currently at 19.8°C: above 22°C no wetsuit needed; 18–22°C a shorty is comfortable for long swims; 14–18°C a 3/2mm full suit; below 14°C a 4/3mm or thicker.

Portugal

Lisbon Coast · Atlantic Ocean

Praia de Sao Juliao

Lisbon Coast family beach.

Mild water with a light chop and a light breeze — comfortable conditions for most swimmers.

View on map OpenStreetMap Directions

Sea temperature now

19.8°Cmild

Good

Updated just now · Source: Open-Meteo Marine

Air temperature

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Wave height

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Wind

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UV index

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Location

Praia de Sao Juliao on the map, with nearby beaches and live sea temperatures.

7-day forecast

Water, air, waves, wind and UV outlook for the week ahead.

Wetsuit recommendation

Shorty 2mm

At 19.8°C a 2mm shorty keeps surfers warm; lap swimmers can usually skip the neoprene.

Surf & watersports

Pleasant but not warm. A short-arm short-leg ("shorty") wetsuit traps body heat through the core while leaving arms and legs free. Open-water swimmers training for 30–60 minutes can usually go without; longer sessions benefit from a thin swim wetsuit.

Open-water swimming

Most swimmers fine to 60 minutes without; consider a 2mm swim suit beyond.

Recommendation tuned for Praia de Sao Juliao's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.

Quick answer

Can I swim at Praia de Sao Juliao today?

The sea is currently 19.8°C — good swimming conditions. Most swimmers will find it pleasant.

Key takeaways

• Located in Lisbon Coast, Portugal (Atlantic Ocean).
• Family friendly with calm, accessible water.
• Live data refreshed hourly from Open-Meteo Marine.

Monthly sea temperature averages

Tap any month to see what to expect — based on regional climatology.

Jan15°C Feb14°C Mar15°C Apr16°C May17°C Jun19°C Jul20°C Aug21°C Sep21°C Oct19°C Nov18°C Dec16°C

14°C → 21°C· Current month outlined· “Best” = within 2°C of the annual peak

Year-round sea temperature

Best swim months: Jul – Aug – Sep

Month	Sea	Comfort
Jan	15°C	Bracing
Feb	14°C	Bracing
Mar	15°C	Bracing
Apr	16°C	Bracing
May	17°C	Bracing
Jun	19°C	Pleasant
Jul	20°C	Pleasant
Aug ⭐	21°C	Pleasant
Sep	21°C	Pleasant
Oct	19°C	Pleasant
Nov	18°C	Pleasant
Dec	16°C	Bracing