How hot is Lisbon in July and August?
Quick answer: in July and August, average highs in Lisbon sit around 28–30 °C (82–86 °F), but during heatwaves they climb easily to 35–40 °C (95–104 °F). Nights are often "tropical" (above 20 °C / 68 °F), which makes sleeping hard. September is still warm. A west-facing or top-floor apartment gets even hotter and takes hours to cool down at night.
| Month | Average high | During heatwaves |
|---|---|---|
| June | ~26 °C (79 °F) | up to ~35 °C |
| July | ~28–29 °C (84 °F) | 35–39 °C |
| August | ~29–30 °C (86 °F) | 36–40 °C |
| September | ~27 °C (81 °F) | up to ~34 °C |
Does my Lisbon Airbnb have air conditioning?
Often not. Air conditioning is not standard in Lisbon, especially in the older buildings of the historic neighbourhoods (Alfama, Mouraria, Bairro Alto, Baixa). Before you book or arrive, check the listing's amenities for "air conditioning" specifically — not just "fan", which won't cope in an apartment at 30 °C. If the listing doesn't mention AC, assume it has none.
How to keep your apartment cool without AC
A few things help: close shutters and curtains during the day to block the sun, air the place out at dawn and at night when it cools, use fans and stay hydrated. But in the middle of a heatwave, in an apartment with no insulation, this is rarely enough to sleep well — which is where a temporary portable air conditioner comes in.
The AC Rental Lisbon solution
You don't need to buy or install anything. We deliver a 9,000 BTU portable air conditioner straight to your Airbnb or hotel, the same day, with the window sealing kit included — no drilling, no works, no landlord permission needed. Perfect for a stay of 3 days to 3 weeks.
Renting an air conditioner for your stay
Renting makes more sense than buying when you only need it for your trip. We deliver across Lisbon and Greater Lisbon — including Belém, Alfama, Baixa, Chiado, Príncipe Real, Cascais, Oeiras and Estoril. From €40/day, €210/week or €450/month, with a refundable €100 deposit. Confirm before 4pm and, subject to availability, we deliver the same day. See pricing or message us on WhatsApp.
Frequently asked questions
Is August too hot in Lisbon?
August is the hottest month, with average highs of 29–30 °C and heatwaves up to 40 °C. It's perfectly visitable, but accommodation without air conditioning can be uncomfortable, especially at night.
Do Lisbon Airbnbs have air conditioning?
Many don't, especially in the older buildings of the historic neighbourhoods. Always check the listing amenities before booking; if it doesn't mention air conditioning, assume it has none.
Can I rent an air conditioner for just a few days?
Yes. We rent by the day (from €40/day), by the week (€210) or by the month (€450), ideal for the exact length of your stay.
Can you deliver to my Airbnb?
Yes, we deliver straight to your accommodation across Lisbon and Greater Lisbon, the same day if you confirm before 4pm, with the window kit included and no fixed installation.