On the beach
Right now
Live conditions from Open-Meteo, refreshed hourly.
7-day outlook
7-day marine forecast from Open-Meteo.
Sea temperature
Next 7 days, °C
Wave height
Next 7 days, metres
View as table
| Day | Sea temp (°C) | Wave height (m) |
|---|---|---|
| Wed 2 | 18.2 | 0.9 |
| Thu 3 | 18.3 | 0.9 |
| Fri 4 | 18.6 | 1.2 |
| Sat 5 | 19.0 | 1.2 |
| Sun 6 | 19.2 | 0.9 |
| Mon 7 | 19.4 | 1.2 |
| Tue 8 | 19.2 | 1.6 |
Water quality history
Official EEA classification, one rating per bathing season, 2015–2025 — real data reported by national authorities.
- 2015: Excellent2015
- 2016: Excellent2016
- 2017: Excellent2017
- 2018: Excellent2018
- 2019: Excellent2019
- 2020: Excellent2020
- 2021: Excellent2021
- 2022: Excellent2022
- 2023: Excellent2023
- 2024: Excellent2024
- 2025: Excellent2025
Excellent in the most recent season, and 11 of 11 classified years rated Excellent or Good.
- Excellent
- Good
- Sufficient
- Poor
- Not classified
View as table
| Year | Classification |
|---|---|
| 2015 | Excellent |
| 2016 | Excellent |
| 2017 | Excellent |
| 2018 | Excellent |
| 2019 | Excellent |
| 2020 | Excellent |
| 2021 | Excellent |
| 2022 | Excellent |
| 2023 | Excellent |
| 2024 | Excellent |
| 2025 | Excellent |
Typical sea temperature by month
Modeled estimatePlausible seasonal climatology derived from latitude, for illustration — not a measured average.
Monthly sea temperature
Typical range across the year, °C
View as table
| Month | Typical sea temp (°C) |
|---|---|
| Jan | 15 |
| Feb | 14 |
| Mar | 15 |
| Apr | 16 |
| May | 19 |
| Jun | 21 |
| Jul | 23 |
| Aug | 24 |
| Sep | 23 |
| Oct | 22 |
| Nov | 19 |
| Dec | 17 |
Location & nearby beaches
Nearby beaches
- Greve Blanche659 mFinistère
- Pors Kernok735 mFinistère
- Roc'H Kroum2.1 kmFinistère
- Ruguel2.9 kmFinistère
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- No parking is mapped within 1.5 km of the beach — expect a walk, or arrive early once the season gets busy.
- Nearest ferry landing is about ~400 m away.
Food, stays & town
- Nearest village: Île-de-Batz, about ~800 m away.
- 7 places to eat within 1 km Closest is Le resto d'en Batz, about ~100 m away.
- 1 place to stay mapped nearby Closest is Auberge de jeunesse, about ~160 m away.
What kind of beach is this?
This beach belongs to a small coastal village. It's usually calmer than a resort or town beach, though a popular village spot can still fill up on the best summer days.
Estimated from OpenStreetMap surroundings data (ODbL).
Is the water clean at Pors Alliou?
Thinking of swimming at Pors Alliou? The short answer: its official EU Bathing Water rating for 2025 is Excellent — the highest official classification under the EU bathing-water assessment. That rating is set once a year under the EU Bathing Water Directive, from a full season of testing for intestinal enterococci and E. coli reported to the European Environment Agency the following spring, so the 2025 season's grade appeared in spring 2026 and the 2026 season won't be graded until spring 2027. In addition to that yearly rating, some national authorities — for Croatia, the national environmental authority — publish individual water sample results during the season itself, ahead of the annual report. It's been a consistently reliable spot too — the rating has held at Excellent for 11 straight years.
Looking to avoid the busiest weeks? The water is typically warmest around August, with the most reliable swimming window running July–September; outside that stretch you'll find a cooler sea but a quieter beach. That rating has been consistent: every one of the 11 classified seasons on record has come back Excellent or Good. On site you'll find Toilets, Restaurant, and Benches. Île-de-Batz — the closest town — sits about ~800 m from here.
“Excellent” is one point on a four-step scale — Excellent, Good, Sufficient or Poor — assigned once per year from that season's water samples, not a live reading. It describes how the site performs on average across the season, not the exact water quality this afternoon; for day-to-day sea conditions, see the “Right now” and 7-day outlook panels above. There are 7 places to eat within a kilometre — Le resto d'en Batz is the closest, about ~100 m away.
Frequently asked questions
Is Pors Alliou a safe beach for swimming?
Generally, yes. Pors Alliou's 2025 EU Bathing Water rating is Excellent — the highest tier — backed by 11 of 11 classified seasons rated Excellent or Good. It's also held steady at Excellent for 11 straight years.
How warm is the sea at Pors Alliou right now?
As of the latest update, the sea temperature at Pors Alliou is around 18°C — see the “Right now” panel above for live conditions. That's the reading right off Finistère.
What's the best month to visit Pors Alliou for swimming?
The most reliable stretch for warm water runs through July–September, based on the modeled climatology. That applies to the water around Finistère.
What's behind the water quality rating shown above?
The annual classification — Excellent, Good, Sufficient or Poor — is built from a full season of official testing for intestinal enterococci and E. coli, reported to the European Environment Agency each spring. Some national authorities (Croatia's IZOR among them) also publish individual samples during the season itself; Pors Alliou isn't yet covered by that in-season feed.
Can you drive to Pors Alliou?
There's no parking mapped within 1.5 km of Pors Alliou, so plan on a walk, or arrive early once it gets busy. There's a ferry landing about ~400 m from the beach. The nearest town is Île-de-Batz, about ~800 m away.