September is one of the best months to visit Lisbon. Expect daytime highs around 27°C, nights near 17°C and roughly 3 rainy days across the month. Summer weather without the August crush: 26-27C early in the month, sea still warm, evenings made for miradouros. Prices dip from peak after the first week.
Day high
27°C
Night low
17°C
Rainy days
≈ 3
Verdict
Go
September is high demand: book 4 to 6 weeks out to keep these prices realistic.
Couples€€€Rooftop hideaway · Alfama
Adults-oriented boutique hotel buried in the Alfama lanes, with a red-tiled wine bar terrace and a small rooftop pool looking straight down the Tagus. Rooms are compact; you pay for the view and the silence.
from ~180 EUR/night
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Longer stays€€€Apartment suites · Bairro Alto
Full apartments with kitchens inside a converted palace on Bairro Alto's calmer upper edge, plus a rooftop bar locals actually use. Ask for a back-facing suite if you sleep before 2am on weekends.
from ~200 EUR/night
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First visit€€Central and practical · Baixa-Chiado
Right on Rossio square, which puts tram 28, the Santa Justa lift and both center hills within a five-minute walk. Rooms over the square are the photogenic ones; rooms at the back are the quiet ones.
from ~110 EUR/night
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Budget€Hostel with suites · Principe Real
A grand old townhouse at the São Pedro de Alcântara viewpoint, split between dorms and surprisingly good private suites. You get a five-star location at hostel prices, steps from the Príncipe Real cafes.
from ~45 EUR/night
Check pricesReal hotel photos · prices are indicative from-rates, not live quotes · booking links support the site at no extra cost
With highs around 27°C, September is outdoor weather: prioritize viewpoints, parks and long walks.
Praca do Comercio
TipCome before 9am for empty-square photos with the Rua Augusta arch, then skip the overpriced terrace cafes on the square itself. The riverfront steps at Cais das Colunas on the south side are the free front-row seat at sunset.
Castelo de Sao Jorge
TipBuy the timed ticket online (about 15 EUR) and take the first slot at 9am, the ticket line hits 45 minutes by late morning in season. Ride bus 737 from Praca da Figueira to the gate instead of climbing, and save your legs for the ramparts.
Miradouro da Senhora do Monte
TipThis is the highest and widest viewpoint in the old town and it is free, but the low wall fills 45 minutes before sunset, so arrive early to claim a spot. There is no cafe up here, grab drinks from a shop on Graca's main street on the way.
Jeronimos Monastery
TipThe church nave is free to enter, only the cloisters need the ticket (about 12 EUR), so book the first slot at 9:30 online and do the cloisters before the coach groups land around 10:30. It is closed Mondays, a classic day-trip planning mistake.
Ready to plan the full trip? Start from the 3-day Lisbon itinerary.
September is one of the best months to visit Lisbon. Expect daytime highs around 27°C, nights near 17°C and roughly 3 rainy days across the month. Summer weather without the August crush: 26-27C early in the month, sea still warm, evenings made for miradouros. Prices dip from peak after the first week.
Typical September days in Lisbon reach about 27°C, dropping to around 17°C at night. Layers work best.
Count on roughly 3 days with rain in September. Rain rarely lasts all day, so plans hold up well.