Is August a good month to visit Lisbon?

Yes, with caveats. Comfortable temperatures, smaller crowds than peak summer. Sea around 20°C — bracing entry, fine once you're in.

Can you swim in Lisbon in August?

Sea is around 19.6°C — local-only territory in August.

What's the average rainfall in Lisbon in August?

About 4 mm on the 1991-2020 baseline — dry.

Is August crowded in Lisbon?

Yes — August is peak season in Lisbon. Book accommodation 4-8 weeks ahead, restaurants the day before for prime tables.

Lisbon · August 2026

Lisbon weather in August 2026

Comfortable summer-shoulder weather — Lisbon averages a 26.7°C high in August. Largely dry. Sea 19.6°C — brisk but doable.

Avg high

26.7°C

Avg low

19°C

Rainfall

3.9 mm

Dry

Sun

0 h/day

Sea temp

19.6°C

Brisk but doable

What to wear

Daytime is t-shirt-and-shorts; evenings warrant a jumper or a light jacket near the water. Sun-block on the strong end of the spectrum — UV is still high under haze.

What’s open in August

Year-round spots plus seasonal venues whose own season covers August. Tap through for the editorial detail page.

Common questions

Is August a good month to visit Lisbon?: Yes, with caveats. Comfortable temperatures, smaller crowds than peak summer. Sea around 20°C — bracing entry, fine once you're in.
Can you swim in Lisbon in August?: Sea is around 19.6°C — local-only territory in August.
What's the average rainfall in Lisbon in August?: About 4 mm on the 1991-2020 baseline — dry.
Is August crowded in Lisbon?: Yes — August is peak season in Lisbon. Book accommodation 4-8 weeks ahead, restaurants the day before for prime tables.