Lisbon · August
Best travel monthPeak seasonPortugal · Europe
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 15° (59°)10– (50–)18 (64) | 16° (61°)11– (52–)20 (68) | 18° (64°)13– (55–)24 (75) | 20° (68°)14– (57–)27 (81) | 24° (75°)17– (63–)32 (90) | 26° (79°)20– (68–)35 (95) | 29° (84°)23– (73–)37 (99) | 29° (84°)23– (73–)36 (97) | 27° (81°)21– (70–)34 (93) | 24° (75°)17– (63–)29 (84) | 18° (64°)13– (55–)22 (72) | 16° (61°)11– (52–)18 (64) |
Ø night, range from coldest to warmest nightØ nightrange | 9° (48°)2– (36–)14 (57) | 9° (48°)4– (39–)13 (55) | 11° (52°)6– (43–)15 (59) | 13° (55°)8– (46–)16 (61) | 15° (59°)10– (50–)19 (66) | 17° (63°)14– (57–)22 (72) | 19° (66°)15– (59–)22 (72) | 19° (66°)16– (61–)23 (73) | 18° (64°)15– (59–)22 (72) | 16° (61°)12– (54–)20 (68) | 12° (54°)6– (43–)16 (61) | 10° (50°)4– (39–)14 (57) |
☀️Sunshine | 5h | 6h | 8h | 9h | 10h | 10h | 11h | 10h | 9h | 7h | 5h | 5h |
🌊Water Temp | 15° (59°) | 15° (59°) | 15° (59°) | 16° (61°) | 17° (63°) | 18° (64°) | 18° (64°) | 18° (64°) | 18° (64°) | 18° (64°) | 17° (63°) | 15° (59°) |
🌧Rain Days | 6d68mm (2.7") | 6d61mm (2.4") | 6d65mm (2.6") | 6d56mm (2.2") | 3d30mm (1.2") | 1d12mm (0.5") | 0d1mm (<0.1") | 0d3mm (0.1") | 2d24mm (1.0") | 6d86mm (3.4") | 8d102mm (4.0") | 6d81mm (3.2") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Peak season — flights and hotels at their annual highest. Book early.
August is one of the best months to visit Lisbon — with 10 sunshine hours per day and pleasant highs of 29°C (84°F).
Daytime highs average 29°C (84°F), cooling to 19°C (66°F) at night (daily average: 23°C (73°F)). Peaks reach around 36°C (97°F), the coldest nights around 16°C (61°F). With 10 sunshine hours per day, August is one of the sunniest months — 3 mm (0.1 in) of rain over 0 days. The sea is 18°C (64°F) — refreshing and manageable for confident swimmers.
Light, breathable clothing and sun protection are essential. Early mornings and evenings are good for excursions when it's a little cooler.
In June the Festas de Santo António turn Alfama and Mouraria into one big street party with grilled sardines, fado and dancing until dawn. Summer stays dry and warm, daylight lasts until almost 9 pm — Bairro Alto never sleeps.
Packing list for Lisbon in August
- Light summer clothes
- Thin cardigan for cool evenings
- SPF 50 sunscreen
- Sunglasses
- Sun hat
- Travel first-aid kit
Frequently Asked Questions
- Is August a good time to visit Lisbon?
- Yes — August is one of the best months to visit Lisbon (Climate Score: 96/100). Pleasant temperatures (29°C (84°F)), good sunshine (10 h/day), and few rain days (0) make it one of the most recommended months.
- How warm is it in Lisbon in August?
- In August, Lisbon sees daily highs of 29°C (84°F). Nights cool to 19°C (66°F), with a daily average of 23°C (73°F). Peaks reach around 36°C (97°F), the coldest nights around 16°C (61°F).
- How much rain falls in Lisbon in August?
- In August, Lisbon receives an average of 3 mm (0.1 in) of rain over 0 rain days. That is comparatively dry.
- How many sunshine hours does Lisbon get in August?
- Lisbon averages 10 sunshine hours per day in August — above the annual average.
- How warm is the water in Lisbon in August?
- Water temperature in Lisbon in August averages 18°C (64°F) — refreshing but slightly cool for sensitive swimmers.
