L91
Netherlands
Last wave reading:
Now at the buoy
Significant wave height at the buoy
13.4 ft
4.1 m
- Dominant period
- 11 s
- Direction
- no direction
This station does not send a swell and wind-wave split, so the numbers are for the whole sea.
Mid-period swell: 13.4 ft at 11 s. Holding steady over the last 6 hours.
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 2 days, the model tracked the buoy within 10%.
| Day | Height | Peak period | From |
|---|---|---|---|
| Fri, Nov 13 | 13.0 ft | 10 s | NNW |
| Sat, Nov 14 | 7.8 ft | 9.5 s | NNW |
| Sun, Nov 15 | 7.5 ft | 6.5 s | SSW |
| Mon, Nov 16 | 11.2 ft | 8 s | WNW |
| Tue, Nov 17 | 9.1 ft | 8.8 s | WNW |
| Wed, Nov 18 | 5.7 ft | 7.5 s | NNW |
| Thu, Nov 19 | 5.1 ft | 7.7 s | NNW |
| Fri, Nov 20 | 4.0 ft | 9 s | N |
ECMWF WAM wave model via Open-Meteo, nearest model cell (53.500°N, 5.000°E). Both lines are significant wave height at sea, the same measure the buoy reports. Model output, not a Quiver beach forecast.
Nearby buoys
- Stortemelk Boei9.6 ft · 11 sLive · 32 km
- Stortemelk Oost4.8 ft · 3.7 sLive · 34 km
- Wadden Eierlandse Gat11.7 ft · 9.1 sLive · 42 km
- AWG10.4 ft · 13 sLive · 67 km
- Schiermonnikoog Noord14.2 ftLive · 80 km
- Schiermonnikoog Waggen0.3 ft · 13 sLive · 84 km
How to read this buoy
Biggest hourly reading in that record: 13.6 ft at 11 s on Nov 13.
- Station id
- L91
- Operator
- Rijkswaterstaat Water- Traffic and Environment
- Program
- Copernicus Marine In Situ
- Position
- 53.614°N, 4.961°E
- Type
- Moored buoy
- Local time zone
- Europe/Amsterdam
- Swell split
- No, whole-sea numbers only
Source: E.U. Copernicus Marine Service Information; https://doi.org/10.48670/moi-00036. Data from Rijkswaterstaat Water- Traffic and Environment. 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.
