Noirmoutier
France
Last wave reading:
Last reading
This reading is more than 3 hours old. The buoy may have stopped sending waves for now.
Significant wave height at the buoy
4.3 ft
1.3 m
- Dominant period
- —
- Direction
- no direction
This station does not send a swell and wind-wave split, so the numbers are for the whole sea.
Waves: 4.3 ft.
Significant wave height is the average of the biggest third of waves at the buoy. It is not surf height at a beach.
Trend at the buoy
Height at the buoy
- Total (significant height)
Period
- Dominant period
Hourly means of the buoy's readings. Arrows point the way the waves travel.
Model vs the buoy
- Buoy, hourly
- Model, past days
- Model forecast
Over the last day, the model ran 13% high against the buoy.
| Day | Height | Peak period | From |
|---|---|---|---|
| Fri, Nov 13 | 4.9 ft | 7.1 s | N |
| Sat, Nov 14 | 4.5 ft | 4.7 s | ESE |
| Sun, Nov 15 | 10.8 ft | 8.4 s | SW |
| Mon, Nov 16 | 10.6 ft | 9.7 s | W |
| Tue, Nov 17 | 14.9 ft | 10 s | W |
| Wed, Nov 18 | 15.2 ft | 14 s | W |
| Thu, Nov 19 | 17.3 ft | 15 s | W |
| Fri, Nov 20 | 11.9 ft | 14 s | W |
ECMWF WAM wave model via Open-Meteo, nearest model cell (47.000°N, 2.750°W). Both lines are significant wave height at sea, the same measure the buoy reports. Model output, not a Quiver beach forecast.
Nearby buoys
- Ile d'Yeu Nord2.3 ftLive · 34 km
- SEM-REV - Plateau du Four3.0 ftLive · 36 km
- Belle-Ile2.3 ftLive · 59 km
- Royan0.7 ftLive · 195 km
- Pierres-Noires2.3 ftLive · 227 km
- Cap-Ferret4.3 ftLive · 271 km
How to read this buoy
Biggest hourly reading in that record: 7.5 ft on Nov 11.
- Station id
- 6200251
- Operator
- Cerema
- Program
- Copernicus Marine In Situ
- Position
- 46.917°N, 2.722°W
- Type
- Moored buoy
- Local time zone
- Europe/Paris
- Swell split
- No, whole-sea numbers only
Source: E.U. Copernicus Marine Service Information; https://doi.org/10.48670/moi-00036. Data from Cerema. Licence: Copernicus Marine Service licence. Changes: Quiver converts the units (feet, knots, °F) and shows a subset of the published fields.
Not for navigation. Readings can be late, missing or wrong; check official marine forecasts before going to sea.
Buoy terms
- Significant height
- The average of the biggest third of waves the buoy measured. Sets in the surf zone can be bigger or smaller.
- Dominant period
- Seconds between the waves carrying the most energy. Longer period means more power and more bend around points.
- Swell vs wind waves
- Swell was made by distant wind; wind waves were made nearby. The buoy splits its spectrum at a cutoff period to report each.
- Direction
- Where waves come from, in degrees true. 270° is from the west.
