Tide
Heights retain the vertical reference supplied by the source and are not an official hydrographic zero.
NowRising tide3.7 m
Next eventHigh · 07:22 PMin 0 h 42 · 4.0 m
Tidal range
Difference in height between one high tide and the following low tide.
Translated from the cited source.
Source: Shom — Définitions des mots clefs (GT TSH, mars 2025)
Heights shown-4.1 m → 4.0 m
4.0 m1.3 m-1.4 m-4.1 mLow01:22 PM-3.9 mHigh07:22 PM4.0 mLow01:41 AM-4.1 mHigh07:41 AM3.9 m
- Low01:22 PM · -3.9 m
- High07:22 PM · 4.0 m
- Low01:41 AM · -4.1 m
- High07:41 AM · 3.9 m
Hover or touch the curve to read the time and height. Use arrow keys on a keyboard.
Sea conditions
sea model sampled 6.3 km from the beach
- Estimated surface07:00 PM
- ≈ 18.5 °C
- Waves
- 1.1 m
- Period
- 8.5 s
- Swell
- 1.0 m W
- Modelled current
- 2.3 km/h
Surface temperature · 24 h≈ 18.3 °C – 18.5 °C
18.5 °C
18.4 °C
18.3 °C
18.4 °C
18.4 °C
Local conditions
- Humidity
- 87 %
- UV
- 0.9
- Cloud cover
- 100 %
- Sunrise
- 08:09 AM
- Sunset
- 08:03 PM
Open‑Meteo forecast at the nearest grid point.
Forecast
Temperature over 48 hours
Modelled forecasts may change. Hourly values are spaced three hours apart; scroll to view all 48 hours.
Hourly temperature forecast
Source point, no interpolationSunday, September 27, 2026
Monday, September 28, 2026
Tuesday, September 29, 2026
This point remains readable, but it is outside the common selectable horizon.
Seven-day weather outlook
Modelled forecasts may change. Hourly values are spaced three hours apart; scroll to view all 48 hours.Practical information
- Horizon (relief)
- N 10° · NE 10° · E 5° · SE 1° · S 0° · SW 2° · W 6° · NW 7°Relief only, excludes vegetation and buildings.Source record 9/15/2026 · Open source
Sun and shore orientation
September 27, 2026 · Estimated times · local time
Sunrise
Shore orientation unavailable
Sunset
Shore orientation unavailable
Estimated position for this date. Terrain, buildings and clouds may hide the sun; an unobstructed view has not been verified. Calculation method
Wind on the beach
Side wind
The wind blows along the shore.
estimate
Bathing supervision
Supervision not provided
Do you know this beach?
The animation may show sand as a visual default; that does not confirm the real surface. What is the ground actually made of here?
Show catalogue context
- Local area
- 029recorded by the source · Source record 8/25/2026 · Open source
- Catalogue record
- Designated bathing waterrecorded by the source · Source record 8/25/2026 · Open source
- Coast
- Bretagne nordSource record 8/25/2026 · Open source
- Water body
- SeaSource record 8/25/2026 · Open source
Today’s windows
06:00 — 22:00 · select a row for details
photographyVery good window06:03 PM – 08:03 PM
photography
Very good window06:03 PM – 08:03 PM
- moderate wind
- low rain risk
- late-day light
Confidence 72 % · rules coast-v5
Sources EOT20 — Hart-Davis et al. (2021), DGFI-TUM, CC BY 4.0 · Données météo par Open-Meteo.com
sunsetVery good window07:18 PM – 08:48 PM
sunset
Very good window07:18 PM – 08:48 PM
- moderate wind
- low rain risk
- around sunset
Confidence 72 % · rules coast-v5
Sources EOT20 — Hart-Davis et al. (2021), DGFI-TUM, CC BY 4.0 · Données météo par Open-Meteo.com
shore gatheringCheck first11:41 PM – 02:41 AM
shore gathering
Check first11:41 PM – 02:41 AM
- physical window around low tide
Confidence 40 % · rules coast-v5
Sources EOT20 — Hart-Davis et al. (2021), DGFI-TUM, CC BY 4.0 · Données météo par Open-Meteo.com
beach runVery good window08:00 AM – 09:30 AM
beach run
Very good window08:00 AM – 09:30 AM
- moderate wind
- low rain risk
- cooler hour for running
Confidence 72 % · rules coast-v5
Sources EOT20 — Hart-Davis et al. (2021), DGFI-TUM, CC BY 4.0 · Données météo par Open-Meteo.com
coastal walkVery good window10:00 AM – 12:00 PM
coastal walk
Very good window10:00 AM – 12:00 PM
- moderate wind
- low rain risk
- comfortable walking hour
Confidence 72 % · rules coast-v5
Sources EOT20 — Hart-Davis et al. (2021), DGFI-TUM, CC BY 4.0 · Données météo par Open-Meteo.com
family beach timeCheck first01:00 PM – 04:00 PM
family beach time
Check first01:00 PM – 04:00 PM
- low rain risk
- mild temperature
Before you go
- latest health sample has expired
Confidence 0 % · rules coast-v5
Sources EOT20 — Hart-Davis et al. (2021), DGFI-TUM, CC BY 4.0 · Données météo par Open-Meteo.com
Explore nearby
Beaches nearby
Nearby alternatives ranked from the information available in the catalogue.
Superbass · CC BY-SA 4.0Distance0.7 km
Greve Blanche, Finistère
A very close alternative
Annual classification: Excellent
Distance0.7 km
Pors Kernok, Finistère
A very close alternative
Annual classification: Excellent
Distance0.4 km
Porz Adelig, Finistère
A very close alternative
Distance0.6 km
Porz An Iliz Vihan, Finistère
A very close alternative
Distance0.7 km
Pors an Iliz, Finistère
A very close alternative
Distance0.7 km
Porz Du, Finistère
A very close alternative
Discovery score: distance, available annual classification and catalogue quality. It is neither real-time health advice nor a safety conclusion.
Seven-day tide
Modelled tidal range · source reference| Sunday | Monday | 29 Tuesday | 30 Wednesday | 1 Thursday | 2 Friday | 3 Saturday |
|---|---|---|---|---|---|---|
Modelled tidal range7.86 m Low tide01:08 AM-3.89 m High tide07:09 AM3.66 m Low tide01:22 PM-3.86 m High tide07:22 PM3.97 m | Modelled tidal range8.21 m Low tide01:41 AM-4.11 m High tide07:41 AM3.94 m Low tide01:57 PM-4.04 m High tide07:56 PM4.11 m | Modelled tidal range8.14 m Low tide02:16 AM-4.12 m High tide08:15 AM4.01 m Low tide02:33 PM-4.01 m High tide08:32 PM4.02 m | Modelled tidal range7.76 m Low tide02:52 AM-3.90 m High tide08:50 AM3.85 m Low tide03:11 PM-3.75 m High tide09:10 PM3.69 m | Modelled tidal range6.95 m Low tide03:31 AM-3.47 m High tide09:29 AM3.47 m Low tide03:53 PM-3.28 m High tide09:51 PM3.15 m | Modelled tidal range5.79 m Low tide04:15 AM-2.87 m High tide10:12 AM2.92 m Low tide04:43 PM-2.66 m High tide10:40 PM2.46 m | Modelled tidal range4.46 m Low tide05:09 AM-2.19 m High tide11:06 AM2.27 m Low tide05:49 PM-2.03 m High tide11:45 PM1.75 m |
The range is calculated from each day’s modelled heights. Heights retain the source reference and do not replace official times.
Tide calendarBrowse the month day by day with the modelled tidal range when available.Official information
FinistèreAnnual classification : Excellent
Latest sample : Sep 2, 2025, 12:00 AMOpen the health profile ↗An annual classification or the absence of an event in the feed does not mean bathing is currently permitted. Local signs and published orders take priority.
The place in pictures
View on Google Maps ↗No freely licensed photograph of Pors Alliou has yet passed our location, licence and credit review.
Country profile
- Languages
- French
- Emergency
- General number 112Police 17Fire 18Ambulance 15
- Currency
- Euro
- Driving side
- right
Wikidata · CC0 · Retrieved on Sep 18, 2026
Sources and method
How to read the figures on this page, and what they do not say.
- Tide heights
- Heights retain the vertical reference supplied by the source and are not an official hydrographic zero.
- Sea temperature and conditions
- Temperature and conditions come from a limited-resolution coastal model, not an observation at the beach. Do not use for navigation or to conclude that bathing is safe.
- Beach characteristics
- These place characteristics are recorded from the linked sources. They describe the place, not current conditions.
Source & freshness
EOT20 — Hart-Davis et al. (2021), DGFI-TUM, CC BY 4.0Modelled reference
Modelled data · Tide model
Method and source ↗Licence ↗Données météo par Open-Meteo.comFresh
Modelled data · Weather forecast
Method and source ↗Licence ↗Données marines par Open-Meteo.comFresh
Modelled data · Marine forecast
Method and source ↗Licence ↗Météo-France — Vigilance météorologique, Licence OuverteFresh
Official regulation
Method and source ↗Licence ↗Ministère des Solidarités et de la Santé — Données de rapportage de la saison balnéaire — mise à jour de la ressource data.gouv.frFresh
Official catalogue · Bathing water quality
Method and source ↗Licence ↗Ministère des Solidarités et de la Santé — Données de rapportage de la saison balnéaire — mise à jour de la ressource data.gouv.frFresh
Official catalogue · Bathing water quality
Method and source ↗Licence ↗Ministère des Solidarités et de la Santé — Données de rapportage de la saison balnéaire — mise à jour de la ressource data.gouv.frExpired
Official catalogue · Bathing water quality
Method and source ↗Licence ↗EEA/WISE Bathing Water Quality 2025 et autorités nationales — classement annuel, pas un avis sanitaire actuelAging
Official catalogue · Bathing water quality
Method and source ↗Licence ↗Copernicus DEM GLO-30 -- (c) DLR e.V. 2010-2014 and Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; distributed via the AWS Open Data Registry (bucket copernicus-dem-30m).Fresh
Additional source
Method and source ↗Copernicus DEM GLO-30 © DLR e.V. et Airbus DS, fourni par l'UE et l'ESAFresh
Copernicus DEM (elevation)
Method and source ↗Licence ↗NOAA OISST v2.1 (NOAA PSL)Fresh
NOAA OISST (sea temperature)
Method and source ↗Licence ↗© contributeurs OpenStreetMap (ODbL)Fresh
OpenStreetMap (coastline layout)
Method and source ↗Licence ↗Préfecture de Finistère — source officielleUnavailable
Administrative directory
Method and source ↗Modelled sea level: limited coastal accuracy, and a different reference from chart datum.
Modelled data and this estimate do not replace an official source. Mareloa is not a navigation tool.