Portugal / Faro
Praia dos Três Irmãos
Praia dos Três Irmãos is a 573 m-long sandy beach facing south-south-west, 1.4 km south-east of Alvor (Faro, Portugal). The sea averages 20.0 °C in September, its warmest month, and 15.2 °C in February; it never reaches 21 °C on average.
Average sea surface temperature by month. Current month outlined.
Month by month
October at Praia dos Três Irmãos
Beach-day index 7.5/10 · Portugal median 6.6
| Measure | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea °C | 15.9 °C | 15.2 °C | 15.3 °C | 16.0 °C | 16.9 °C | 18.6 °C | 19.4 °C | 19.9 °C | 20.0 °C | 19.4 °C | 18.0 °C | 16.8 °C |
| High °C | 14° | 15° | 18° | 20° | 25° | 31° | 35° | 34° | 30° | 24° | 18° | 14° |
| Low °C | 4° | 5° | 6° | 8° | 11° | 15° | 16° | 17° | 15° | 12° | 7° | 5° |
| Rain mm | 50 | 47 | 56 | 54 | 30 | 8 | 1 | 4 | 23 | 69 | 84 | 63 |
| Cloud % | 51 | 46 | 47 | 45 | 36 | 27 | 18 | 18 | 27 | 41 | 46 | 49 |
| Wind m/s | 4.1 | 4.3 | 4.5 | 4.3 | 4.3 | 4.5 | 4.8 | 4.5 | 3.8 | 4.0 | 4.2 | 4.2 |
| Daylight h | 9.9 | 10.8 | 11.9 | 13.1 | 14.1 | 14.7 | 14.5 | 13.6 | 12.5 | 11.3 | 10.2 | 9.6 |
| Record high/low | 20°/-5° | 22°/-5° | 28°/-3° | 31°/1° | 36°/4° | 44°/9° | 45°/12° | 44°/12° | 43°/10° | 35°/4° | 27°/-2° | 20°/-4° |
| Beach index | 3.4 | 3.2 | 3.3 | 4.8 | 7.4 | 8.2 | 7.0 | 7.3 | 8.6 | 7.5 | 4.0 | 3.5 |
Long-term monthly averages: air from NASA POWER (2001–2020), sea from NOAA OISST (1991–2020); records are the extremes of 2001–2020. How the index works.
When to go
The beach-day index peaks in June and September; September scores 8.6/10 with highs of 30 °C, sea at 20.0 °C and 23 mm of rain.
In September that is 0.6 points above the median of the 344 beaches in Portugal covered by this atlas.
At its warmest the water here is 1.1 °C warmer than the Portugal median for September (18.9 °C).
Across the year the sea averages 17.6 °C, cooler than 60% of the coastal beaches in the atlas.
November is the wettest month (84 mm) and July the driest (1 mm); the yearly total is about 490 mm.
Daylight runs from 9.6 hours in December to 14.7 hours in June; in mid-September the sun rises at 07:15 and sets at 19:44 local time.
Orientation, sun and shore
The shore faces south-south-west (200°). Open water fills about 42% of the horizon close by, which makes it an open stretch of shore.
The sun sets over the sea in October–March; in mid-December it goes down at 17:18 local time on a bearing of 241°.
Straight out to the south-south-west about 800 km of open sea lies before the next coast, enough for large swells to build.
About 1 km offshore the sea is roughly 13 m deep and 27 m at 3 km. Behind the beach the ground is about 23 m above sea level 500 m inland and 38 m at 1.5 km.
Within 1 km, the land is 47% grassland, 33% built-up land and 11% tree cover (satellite land-cover map, 2021): a partly built-up setting. Water makes up 45% of that circle.
- Grass 47%
- Built 33%
- Tree 11%
- Bare 8%
Land cover: ESA WorldCover 2021 (10 m). Orientation from OpenStreetMap land polygons sampled in 36 directions; depths and heights from the GEBCO 2020 grid (about 450 m cells), indicative only.
Bathing water quality
The official EU bathing-water site “Alvor-Nascente”, 150 m from the beach centre, was rated Excellent for the 2025 season. It was Excellent in 11 of its 11 classified seasons since 2015.
- 2015Excellent
- 2016Excellent
- 2017Excellent
- 2018Excellent
- 2019Excellent
- 2020Excellent
- 2021Excellent
- 2022Excellent
- 2023Excellent
- 2024Excellent
- 2025Excellent
Source: European Environment Agency, EU Bathing Water Directive assessments · national site profile. Classes are based on four seasons of bacteriological sampling.
The beach is tagged as supervised.
Photos
From above
Facilities within 1 km
- 15Restaurants, cafés & bars
- 5Public toilets
- –Showers
- 15Car parks
- –Lifeguard stations
- 30Hotels & guesthouses
- 15Bus stops (1.5 km)
- 1Cash machines
Food and drink mapped within 1 km: 13 restaurants and 2 bars. Accommodation: 30 hotels and guesthouses.
Counted within 1 km of the beach (bus stops 1.5 km) from OpenStreetMap features and Overture Maps places, release of 2026-10. Unmapped does not mean absent.
Getting there
| Airport | Code | Distance | Direction |
|---|---|---|---|
| Portimão Airport Portimão | PRM | 3.3 km | north |
| Faro - Gago Coutinho International Airport Faro | FAO | 55.4 km | east |
| Cascais Airport Cascais | CAT | 191 km | north |
Straight-line distances from the beach; road distance is usually 20–40% longer.
Local transport: 15 bus stops within 1.5 km and 15 mapped car parks within 1 km.
8 towns and villages of 1,000+ people lie within 10 km (about 120.5K residents); within 30 km there are 25 (about 216.3K).
Map and nearby beaches
Loading map…
Open in OpenStreetMap · Directions in Google Maps
- Praia Grande5.5 km ECompare
Data on this page
- Air temperature, rain, cloud, wind, humidity: NASA POWER climatology 2001–2020, 0.5° grid.
- Sea temperature: NOAA OISST v2.1 monthly normals 1991–2020, nearest ocean cell 3.9 km away.
- Beach outline, surface, rules and public facilities: OpenStreetMap contributors (ODbL), feature w1245711193; restaurants, cafés, bars and lodging: Overture Maps places (CDLA-Permissive-2.0).
- Water body, status and length: Wikidata (CC0).
- Towns and time zone: GeoNames (CC BY 4.0). Airports: OurAirports (public domain). Sunrise and sunset: NOAA solar equations.
- Photos: Wikimedia Commons, author and licence under each image.
- Satellite view: Copernicus Sentinel-2 (ESA), scene S2C_29SNB_20260727_0_L2A.
- Orientation: OpenStreetMap land polygons (ODbL). Depth and terrain: GEBCO 2020 grid.
- Bathing-water quality: European Environment Agency (site PTCW7C).
- Settlements: GeoNames places with 1,000+ inhabitants.
- Land cover: ESA WorldCover 2021, 10 m (CC BY 4.0).
- Search popularity: about 880 Google searches a month for the name (KeywordTool, October 2026).
Data compiled 2026-10-13. Something wrong? Report a data error.