Italy / Sardinia
Mari Ermi
Mari Ermi is a 1.6 km-long pebble beach facing west-south-west, 12.2 km west of Nurachi (Sardinia, Italy). The sea averages 24.6 °C in August, its warmest month, and 13.7 °C in February; it is 21 °C or warmer in June–October.
Average sea surface temperature by month. Current month outlined.
Month by month
October at Mari Ermi
Beach-day index 7.6/10 · Italy median 6.5
| Measure | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea °C | 14.1 °C | 13.7 °C | 14.0 °C | 15.2 °C | 17.7 °C | 21.0 °C | 23.6 °C | 24.6 °C | 23.3 °C | 21.1 °C | 18.3 °C | 15.5 °C |
| High °C | 12° | 13° | 16° | 20° | 24° | 29° | 32° | 32° | 27° | 23° | 17° | 13° |
| Low °C | 4° | 4° | 6° | 8° | 12° | 16° | 19° | 19° | 16° | 13° | 9° | 5° |
| Rain mm | 49 | 43 | 41 | 44 | 33 | 11 | 4 | 12 | 37 | 52 | 80 | 59 |
| Cloud % | 67 | 64 | 61 | 58 | 53 | 39 | 31 | 33 | 47 | 53 | 63 | 64 |
| Wind m/s | 4.2 | 4.2 | 4.3 | 4.1 | 4.0 | 3.5 | 3.7 | 3.4 | 3.5 | 3.7 | 4.2 | 4.2 |
| Daylight h | 9.6 | 10.7 | 11.9 | 13.2 | 14.4 | 15.0 | 14.8 | 13.8 | 12.5 | 11.2 | 10.0 | 9.4 |
| Record high/low | 20°/-3° | 23°/-3° | 27°/-3° | 32°/1° | 35°/6° | 41°/10° | 42°/13° | 42°/13° | 39°/9° | 33°/4° | 25°/-1° | 20°/-2° |
| Beach index | 2.9 | 3.0 | 3.0 | 4.2 | 7.0 | 8.9 | 9.1 | 9.1 | 9.2 | 7.6 | 3.8 | 3.0 |
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–September; September scores 9.2/10 with highs of 27 °C, sea at 23.3 °C and 37 mm of rain.
In September that is 0.3 points above the median of the 925 beaches in Italy covered by this atlas.
At its warmest the water here is 1.2 °C cooler than the Italy median for August (25.8 °C).
Across the year the sea averages 18.5 °C, cooler than 53% of the coastal beaches in the atlas.
November is the wettest month (80 mm) and July the driest (4 mm); the yearly total is about 470 mm.
Daylight runs from 9.4 hours in December to 15.0 hours in June; in mid-September the sun rises at 07:06 and sets at 19:37 local time.
Orientation, sun and shore
The shore faces west-south-west (250°). Open water fills about 47% of the horizon close by, which makes it an open stretch of shore.
The sun sets over the sea in every month; in mid-June it goes down at 20:56 local time on a bearing of 302°.
Straight out to the west-south-west there is open water for more than 2,000 km, so the beach is exposed to long ocean swell. The beach is on an island of about 23,971 km².
About 1 km offshore the sea is roughly 16 m deep and 20 m at 3 km. Behind the beach the ground is about 9 m above sea level 500 m inland and 25 m at 1.5 km.
Within 1 km, the land is 54% cropland, 34% grassland and 5% tree cover (satellite land-cover map, 2021): a rural setting among farmland. Water makes up 56% of that circle.
- Crop 54%
- Grass 34%
- Tree 5%
- Bare 5%
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 “Mari Ermi”, 340 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.
OpenStreetMap shows no lifeguard station within 1 km. Seasonal lifeguard posts are often unmapped, so check on site.
Photos
From above
Facilities within 1 km
- 2Restaurants, cafés & bars
- 2Public toilets
- –Showers
- 3Car parks
- –Lifeguard stations
- 3Campsites
Food and drink mapped within 1 km: 2 restaurants.
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.
Around the beach
Campsites
- Agricampeggio Muras 580 m SE
- Agricampeggio Tanca Is Muras da Angelo 600 m SE
- Agricampeggio Serrano 600 m S
Getting there
| Airport | Code | Distance | Direction |
|---|---|---|---|
| Alghero-Fertilia Airport Alghero | AHO | 74.6 km | north |
| Cagliari Elmas Airport Cagliari | CAG | 97.4 km | south-east |
| Olbia Costa Smeralda Airport Olbia (SS) | OLB | 141 km | north-east |
Straight-line distances from the beach; road distance is usually 20–40% longer.
Local transport: 3 mapped car parks within 1 km.
No town of 1,000+ people lies within 10 km; within 30 km there are 27 (about 81.1K).
Map and nearby beaches
Loading map…
Open in OpenStreetMap · Directions in Google Maps
| Beach | Distance | Warmest sea | Length | Surface |
|---|---|---|---|---|
| Mari Ermi | – | 24.6 °C | 1.6 km | Pebble |
| Is Arutas | 1.7 km S | 24.6 °C | 503 m | – |
| Spiaggia di Maimoni | 5.9 km S | 24.6 °C | 1.1 km | – |
- Is Arutas1.7 km SCompare
- Spiaggia di Maimoni5.9 km SCompare
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 10.4 km away.
- Beach outline, surface, rules and public facilities: OpenStreetMap contributors (ODbL), feature w72444564; 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 S2B_32TMK_20250808_0_L2A.
- Orientation: OpenStreetMap land polygons (ODbL). Depth and terrain: GEBCO 2020 grid.
- Bathing-water quality: European Environment Agency (site IT020095018009).
- Settlements: GeoNames places with 1,000+ inhabitants.
- Land cover: ESA WorldCover 2021, 10 m (CC BY 4.0).
- Search popularity: about 1K Google searches a month for the name (KeywordTool, October 2026).
Data compiled 2026-10-13. Something wrong? Report a data error.