France · Finistère
Illien
Finistère, France
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 | 18.5 | 1.3 |
| Thu 3 | 18.5 | 1.2 |
| Fri 4 | 18.6 | 1.4 |
| Sat 5 | 19.3 | 1.4 |
| Sun 6 | 19.2 | 1.0 |
| Mon 7 | 19.1 | 1.6 |
| Tue 8 | 19.0 | 2.1 |
Water quality history
Official EEA classification, one rating per bathing season, 2015–2025 — real data reported by national authorities.
- 2015: Sufficient2015
- 2016: Sufficient2016
- 2017: Sufficient2017
- 2018: Sufficient2018
- 2019: Poor2019
- 2020: Poor2020
- 2021: Poor2021
- 2022: Poor2022
- 2023: Poor2023
- 2024: Not classified2024
- 2025: Not classified2025
Not classified in the most recent season, and 0 of 9 classified years rated Excellent or Good.
- Excellent
- Good
- Sufficient
- Poor
- Not classified
View as table
| Year | Classification |
|---|---|
| 2015 | Sufficient |
| 2016 | Sufficient |
| 2017 | Sufficient |
| 2018 | Sufficient |
| 2019 | Poor |
| 2020 | Poor |
| 2021 | Poor |
| 2022 | Poor |
| 2023 | Poor |
| 2024 | Not classified |
| 2025 | Not classified |
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 | 17 |
| May | 19 |
| Jun | 22 |
| Jul | 23 |
| Aug | 24 |
| Sep | 23 |
| Oct | 22 |
| Nov | 19 |
| Dec | 17 |
Location & nearby beaches
Nearby beaches
- Blancs Sablons1.4 kmFinistère
- Porsmoguer-Kerhornou2.8 kmFinistère
- Le Bilou3.1 kmFinistère
- Portez3.1 kmFinistère
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- Easy by car — there's parking close to the beach.
- Bus stop: 276 Illien, about ~190 m away.
Food, stays & town
- Nearest village: Trébabu, about ~2.4 km away.
What kind of beach is this?
With no facilities mapped nearby, this beach is usually on the quiet side even in season — worth knowing if you're after solitude, but also worth bringing your own water and shade.
Estimated from OpenStreetMap surroundings data (ODbL).
- A quiet swim
Is the water clean at Illien?
Thinking of swimming at Illien? The short answer: its official EU Bathing Water rating for 2025 is Not classified — not enough samples in this year to assign an official rating. 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. You can park about ~70 m away.
Over the 9 classified seasons on record, 0 have come back Excellent or Good — a track record worth checking each year rather than assuming. The most reliable swimming window here typically runs from July–September, with the sea usually at its warmest around August. Outside that window the water is cooler and often quieter. Trébabu — the closest town — sits about ~2.4 km from here.
Worth remembering: “Not classified” isn't a live reading, it's an annual grade — Excellent, Good, Sufficient or Poor — set once a year from that season's water samples and describing the average, not this afternoon's conditions. For what the sea is doing right now, check the “Right now” panel and 7-day outlook above. It sits in Finistère.
Frequently asked questions
Is the water at Illien safe right now?
Not without checking first: Illien's 2025 rating is Not classified, so look for local advisories and posted flags before swimming.
Is the sea warm at Illien today?
Checking in on Illien right now: the water is around 19°C, per the latest reading — the “Right now” panel above tracks it live. That's the reading right off Finistère.
Which month has the warmest sea at Illien?
The most reliable stretch for warm water runs through July–September, based on the modeled climatology. That applies to the water around Finistère.
What does the water quality rating actually measure?
National authorities sample the water for intestinal enterococci and E. coli bacteria through the bathing season and report the full-season results to the European Environment Agency each spring for the season just finished, which assigns one of four annual classifications — Excellent, Good, Sufficient or Poor — under the EU Bathing Water Directive. Some national authorities, including Croatia's IZOR, also publish individual in-season sample results ahead of that annual report.
Can you drive to Illien?
By car, it's easy — parking is right by the beach. By bus, the nearest stop is 276 Illien, about ~190 m away. The nearest town is Trébabu, about ~2.4 km away.