Lisbon in August
In August, Lisbon averages 29°C (84°F) during the day and 18°C (64°F) at night, with only about 1 rainy day.
Peak seasonConditions are warm and beach-friendly. Skies are generally dry and clear.
August is a great month to visit Lisbon: pleasant temperatures and relatively few wet days.
How August compares to the rest of the year in Lisbon
August is one of the warmest months in Lisbon (1st of 12) and one of the driest months (12th of 12). Daytime temperature runs 8°C above the annual average (21°C). August runs 1°C warmer than July (28°C) and cools 2°C in September (27°C).
August sunrise & sunset in Lisbon
Times shown for Lisbon local time (Europe/Lisbon), calculated for the 15th of August. They shift by a few minutes day to day across the month.
Photography light in Lisbon — August
Golden-hour and blue-hour windows for the 15th of August, in Lisbon's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Lisbon in August
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on August's tier (Peak season) and Lisbon's popularity.
Crowds & pricing — August in Lisbon
Lisbon is in peak season during this month — expect bigger crowds at famous sights, higher hotel and flight prices, and longer queues. Restaurant reservations a few days out are advisable, and any boutique hotels you have your eye on should be booked weeks ahead. The trade-off: most attractions, restaurants, and seasonal services are fully open, the weather is at its most reliable, and the city feels at its most alive.
Why this tier: excellent tourism weather Northern Hemisphere summer holidays
Sun & mosquito risk — August in Lisbon
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in Lisbon — August
Across the year Lisbon's sea swings from 14.7°C (February) to 19.5°C (June) — August sits at 19.4°C.
Lisbon in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 15°C / 59°F | 8°C / 46°F | 110 mm | 11 | — |
| February | 16°C / 61°F | 8°C / 46°F | 75 mm | 9 | — |
| March | 18°C / 64°F | 10°C / 50°F | 55 mm | 9 | — |
| April | 19°C / 66°F | 11°C / 52°F | 65 mm | 9 | — |
| May | 22°C / 72°F | 13°C / 55°F | 45 mm | 6 | — |
| June | 26°C / 79°F | 16°C / 61°F | 20 mm | 3 | — |
| July | 28°C / 82°F | 17°C / 63°F | 5 mm | 1 | — |
| August | 29°C / 84°F | 18°C / 64°F | 6 mm | 1 | — |
| September | 27°C / 81°F | 17°C / 63°F | 30 mm | 5 | — |
| October | 22°C / 72°F | 14°C / 57°F | 85 mm | 9 | — |
| November | 18°C / 64°F | 11°C / 52°F | 110 mm | 11 | — |
| December | 15°C / 59°F | 9°C / 48°F | 110 mm | 12 | — |
Other cities with similar August weather
🌍 See the full ranked list of climate twins for Lisbon in August →
Frequently asked questions
How hot is Lisbon in August?
In August, Lisbon averages a high of 29°C (84°F) and a low of 18°C (64°F) — generally warm.
Does it rain a lot in Lisbon in August?
August is generally dry in Lisbon, with about 1 rainy day on average.
Is August a good time to visit Lisbon?
August is warm and mostly dry. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Lisbon in August?
Pack lightweight, breathable clothing, sunglasses and sunscreen. See the full August packing list for Lisbon for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.