Weather | 10–18°C (50–64°F) | 12–20°C (54–68°F) | 15–23°C (59–73°F) |
Crowds | Low to moderate | Moderate | Moderate, rising late month |
Atmosphere | Early spring, lighter tourist flow | Bright spring weather, holiday energy, easy walking days | Warmer, greener, and edging toward festival season |
Key events | EDP Lisbon Half Marathon, MONSTRA, Holy Week begins late month | Easter Weekend, Liberty Day, Peixe em Lisboa, IndieLisboa starts | Lisbon Book Fair late month, Out Jazz begins, June-festival buildup starts |
Public holidays | None that usually affect most visitors citywide in the same way as April | Good Friday, Easter Sunday, Liberty Day on April 25 | No major citywide holiday disruption like April, but June bookings start to tighten |
Budget | Good value | Shoulder-season prices, with Easter bumps | Slightly higher than April, especially late month |
Best for | Lower prices, museum-heavy trips, walkers who don’t mind mixed weather | Balanced weather, city sightseeing, Belém, Sintra, food events | Park time, long outdoor lunches, pre-summer value |
Book early? | Only for race weekend and big concerts | Yes for Easter, Sintra slots, derby weekend, and riverside hotels | Yes for late-month stays and anything rolling into June |
Transport tips | Half Marathon weekend affects bridge access | Easter services and holiday crowds can slow central routes | Smooth overall, but late-May weekend demand rises on trains to Sintra and Cascais |