Lisbon · September
Best travel monthTravel 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
Travel season — mid-range prices, good availability.
September is among the best months in Lisbon: only 2 rain days, 27°C (81°F) highs, and good sunshine make for ideal holiday conditions.
Daytime highs average 27°C (81°F), cooling to 18°C (64°F) at night (daily average: 22°C (72°F)). Peaks reach around 34°C (93°F), the coldest nights around 15°C (59°F). The sun shines an average of 9 hours per day; there are 2 rain days with 24 mm (0.9 in) total. The sea is 18°C (64°F) — refreshing and manageable for confident swimmers.
Summer clothing and a light jacket for evenings is enough. Conditions are ideal for excursions, hikes, and sightseeing.
Golden autumn: the summer tourist waves ebb away, the weather stays warm, and the surf beaches around Cascais and Ericeira are now at their best.
Packing list for Lisbon in September
- T-shirts and shorts
- SPF 50 sunscreen
- Sunglasses
- Sun hat
- Travel first-aid kit
Frequently Asked Questions
- Is September a good time to visit Lisbon?
- Yes — September is one of the best months to visit Lisbon (Climate Score: 84/100). Pleasant temperatures (27°C (81°F)), good sunshine (9 h/day), and few rain days (2) make it one of the most recommended months.
- How warm is it in Lisbon in September?
- In September, Lisbon sees daily highs of 27°C (81°F). Nights cool to 18°C (64°F), with a daily average of 22°C (72°F). Peaks reach around 34°C (93°F), the coldest nights around 15°C (59°F).
- How much rain falls in Lisbon in September?
- In September, Lisbon receives an average of 24 mm (0.9 in) of rain over 2 rain days. That is comparatively dry.
- How many sunshine hours does Lisbon get in September?
- Lisbon averages 9 sunshine hours per day in September — above the annual average.
- How warm is the water in Lisbon in September?
- Water temperature in Lisbon in September averages 18°C (64°F) — refreshing but slightly cool for sensitive swimmers.
