worldweather29°Cexceptionally warm
usually 22°C–24°C
warmer than 98% of similar days
night: exceptionally warm
rain: more rain than usual
wind: exceptionally light
Weather in Lisbon - 14-day forecast
Detailed weather forecast for Lisbon, Portugal: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Lisbon
today☀️
29°💧 0.2 mm
Sun☀️
28°💧 0.4 mm
Mon☀️
30°💧 0.2 mm
Tue☀️
27°💧 0.7 mm
Wed☁️
27°💧 0.2 mm
Thu☁️
29°💧 0.6 mm
Fri☀️
33°💧 1 mm
Sat☀️
34°💧 0.4 mm
Forecast vs 1991-2020 climate normal
NASA POWERHow does the current forecast compare with normal?
We compare the coming days with weather usually observed at this time of year.
Monday 7 Sept in Lisbon, the forecast high is 30°C. Typical daytime temperatures at this time of year range from 21°C to 24°C, so it will be exceptionally warm. It is warmer than 99% of similar days.
28°Cexceptionally warm
usually 22°C–24°C
warmer than 97% of similar days
night: exceptionally warm
rain: more rain than usual
wind: typical
30°Cexceptionally warm
usually 21°C–24°C
warmer than 99% of similar days
night: exceptionally warm
rain: more rain than usual
wind: typical
27°Cexceptionally warm
usually 21°C–24°C
warmer than 95% of similar days
night: exceptionally warm
rain: more rain than usual
wind: stronger than usual
27°Cexceptionally warm
usually 21°C–24°C
warmer than 95% of similar days
night: exceptionally warm
rain: more rain than usual
wind: typical
29°Cexceptionally warm
usually 21°C–24°C
warmer than 98% of similar days
night: exceptionally warm
rain: more rain than usual
wind: lighter than usual
33°Cexceptionally warm
usually 21°C–24°C
warmer than 99% of similar days
night: exceptionally warm
rain: more rain than usual
wind: lighter than usual
How warm was this week in previous years?
Each bar shows the average daily high during the same 7-day period in each year.
cooler yearstypical rangewarmer years2026 forecastcurrent forecast
From 1981 to 2025, the 5-11 Sept period averaged 23°C by day. The coolest year was 2024 (20°C) and the warmest was 1988 (27°C). The current forecast averages 29°C - higher than in 100% of historical years.
Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.
Weather warnings - Lisbon
Heatyellow level
from 3 Sept, 11:00 to 6 Sept, 20:00
Areas: Portugal
High temperatures and risk of overheating. Drink plenty of water, avoid the midday sun and look after the elderly.
Source: national weather service via Meteoalarm (EUMETNET). Yellow - be aware, orange - be prepared, red - take action.
14-day forecast - Lisbon
Lisbon 30 & 45-day weather - long-range outlook
Next 16 days · forecast
30°
around 24° at night · days with rain: 0
Weeks 3-4 · avg for September
27°
around 16° at night · rain chance 17%
Weeks 5-7 · avg for October
23°
around 15° at night · rain chance 34%
The 30 & 45-day outlook for Lisbon: the next 16 days are a numerical forecast updated daily - on average 30° by day and 24° at night. Further out we rely on multi-year climate averages: around 27° in September, and about 23° in October. Forecasts beyond two weeks are indicative only.
Day-by-day forecast for Lisbon
Saturday5 September 2026
☀️29°clear sky
Sunday6 September 2026
☀️28°clear sky
Monday7 September 2026
☀️30°clear sky
Tuesday8 September 2026
☀️27°clear sky
Wednesday9 September 2026
☁️27°overcast clouds
Thursday10 September 2026
☁️29°broken clouds
Friday11 September 2026
☀️33°clear sky
Saturday12 September 2026
☀️34°clear sky
Sunday13 September 2026
☀️35°clear sky
Monday14 September 2026
🌤️29°scattered clouds
Tuesday15 September 2026
☀️29°clear sky
Wednesday16 September 2026
☀️31°clear sky
Thursday17 September 2026
☀️31°clear sky
Friday18 September 2026
🌤️30°scattered clouds
Saturday19 September 2026
🌤️27°scattered clouds
Sunday20 September 2026
☁️26°overcast clouds
UV index in Lisbon - is it safe to sunbathe?
Today the UV index in Lisbon is 7 (high) - unprotected fair skin can burn in about 30 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.
Pollen in Lisbon - info for allergy sufferers
Today grasses pollen is highest in Lisbon - about 1 grains/m³, low level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.
Sea temperature - Lisbon
Water today
19°C
Week avg
19°C
Waves today
0.4 m
How's the water?
brisk
16-day sea temperature forecast:
Average sea temperature through the year:
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.
Lisbon weather through the year
Upcoming public holidays in Portugal: Republic Day — 5 October · All Saints Day — 1 November · Restoration of Independence — 1 December.
Nearby and related places
FAQ - Lisbon weather
What is the weather like in Lisbon today?
Today it is about 29° during the day and 25° at night, clear sky.
How far ahead can I check the forecast for Lisbon?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.