Portimão in Fall
In fall (September, October and November), Portimão sees average daytime highs around 23°C and overnight lows near 14°C, with 150 mm of rain over about 19 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 29°C in early September to 17°C by late November. The sky is clear or mostly clear about 50% of the time across fall, and the air most often feels dry.
Fall is Portimão's 2nd-best season to visit on our travel score. For the whole year in context, see Portimão's year-round climate.
- Avg daytime high
- 23°C
- 2nd-warmest season
- Avg overnight low
- 14°C
- Rainfall
- 150 mm
- 19 wet days
- Avg wind
- 12 km/h
- Travel score
- 7.1
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Portimão in Fall
Over the season highs ease from about 29°C in early September to 17°C by late November.
A typical fall day in Portimão reaches about 23°C and drops to 14°C overnight. The warmest of the three months is September, the coolest November.
Portimão weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 15° / 7° | 50 | 7 | 9.7 | 5.0 |
| Feb | 16° / 8° | 47 | 6.1 | 10.6 | 5.5 |
| Mar | 18° / 9° | 56 | 7.7 | 11.7 | 6.5 |
| Apr | 20° / 11° | 49 | 7.5 | 12.9 | 6.8 |
| May | 23° / 13° | 35 | 6 | 14 | 7.8 |
| Jun | 27° / 16° | 7 | 1.6 | 14.5 | 8.1 |
| Jul | 30° / 17° | 1 | 0.4 | 14.3 | 6.8 |
| Aug | 30° / 18° | 3 | 0.6 | 13.4 | 6.6 |
| Sep | 27° / 17° | 22 | 3.6 | 12.3 | 7.6 |
| Oct | 23° / 14° | 66 | 7.8 | 11 | 7.3 |
| Nov | 18° / 10° | 62 | 7.7 | 10 | 6.4 |
| Dec | 16° / 8° | 75 | 8.1 | 9.5 | 5.2 |
Cloud cover in Fall
The sky is clear or mostly clear about 50% of the time across fall.
Chance of precipitation in Fall
Portimão gets around 150 mm of rain over 19 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 12 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 48 min in early September to 9 h 42 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.1 kWh/m².
Is fall a good time to visit Portimão?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is one of the better times to visit Portimão for general sightseeing.
What to pack for Portimão in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Portimão sees daytime highs around 23°C and nights near 14°C. Pack light clothes. Worth having: sun protection. About 19 days see rain.
Sea temperature near Portimão in Fall
The nearest coast averages about 19°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in September at about 20°C and coldest in February near 15°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 15 | 15 | 16 | 17 | 19 | 19 | 20 | 20 | 19 | 18 | 17 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Refreshing | Cool | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 15 | Cool |
| Mar | 15 | Cool |
| Apr | 16 | Cool |
| May | 17 | Cool |
| Jun | 19 | Cool |
| Jul | 19 | Cool |
| Aug | 20 | Cool |
| Sep | 20 | Refreshing |
| Oct | 19 | Cool |
| Nov | 18 | Cool |
| Dec | 17 | Cool |
UV index in Portimão in Fall
Clear-sky midday UV across fall averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Portimão peaks around July 14 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 7 | 8 | 7 | 9 | 10 | 9 | 7 | 5 | 3 | 2 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Very high | High | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 7 | High |
| Apr | 8 | Very high |
| May | 7 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 7 | High |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Where is Portimão?
Portimão sits at 37.1°N, 8.5°W, 13 m above sea level, in Portugal. The nearest listed city is Lagos, 13 km away.
Topography around Portimão
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Portimão.
Within 3 km, the terrain around Portimão has only modest variations in elevation — a maximum elevation change of 68 m around an average of 19 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 309 m; within 80 km, large variations in elevation — a maximum elevation change of 894 m.
The land around Portimão is covered by grassland (33%), artificial surfaces (33%) and water (20%) within 3 km, water (36%) and grassland (29%) within 16 km, and water (48%) and grassland (23%) within 80 km.
Portugal travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / E / F
- 230 V · 50 Hz
- Prices
- ≈ 60% of US
- price level, 2025
- GDP per capita
- $32,082
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 95%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2022
- Road deaths
- 8.2
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 612
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Portimão (37.1386°, -8.5378°, elevation 13 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.