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Saint-Jean-de-Luz wave buoy daily means for Apr 2014

Daily means from the Saint-Jean-de-Luz wave buoy for Apr 2014, including available wave height, period, direction, wind and sea temperature data.

Last observation shown

Data available:  to 

Monthly means for

Latest

Period Summary

Programmatically generated summary. Hog Says

1,424 wave-buoy observations covered all 30 days. Typical wave height was 4.3 ft (10th–90th percentile 2.5–6.8 ft), while mean average of more than one wave period type was 11.4 seconds (10th–90th percentile 9.2–13.8 seconds). Typical calculated wave power was approximately 7.3 kW/m (10th–90th percentile 2.7–22.4 kW/m), derived from significant wave height and energy period. 11 of 4,270 checked values (0.3%) were excluded by quality control. Across 1 comparable year, mean wave height was below the same-month mean of 6.2 ft and mean wave period was the same as the same-month mean of 11.4 seconds.

Generated only from the observations and comparisons shown on this page.

Typical Significant Wave Height

4.3ft
Mean: 4.6 ft
P10–P90: 2.5 — 6.8 ft
Recorded extremes

1.5 — 14.1 ft

Mean Observed Wave Period

11.4secs
P10–P90: 9.2 — 13.8secs
Recorded extremes

4 — 17secs

Available for 712 of 713 hourly samples

Typical Wave Power

Approximately 7.29kW/m
Mean: 11.32kW/m
P10–P90: 2.74 — 22.38kW/m
Recorded extremes

0.84 — 98.35kW/m

Calculated from significant wave height and energy period.

Typical Observed Wind

-, -mph
Mean: - mph
P10–P90: - — - mph

Available for 0 of 713 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 713 hourly samples

Compared With Previous Aprils

Historical baseline from 305 observations across 1 year.

Wave Height
4.6ft
1.6ft below mean
Historical mean 6.234ft
Wave Period
11.4s
In line with the historical mean
Historical mean 11.4s
Water Temperature
–
Not enough comparable data

Chart showing grouped wave observations for Saint-Jean-de-Luz. Use the table on this page for a text version of the same measurements. To open hourly observations, use a linked day name in the table.

About Saint-Jean-de-Luz wave buoy

Saint-Jean-de-Luz is a CANDHIS directional buoy on the French Basque coast near the Spanish border. Maintained through the Cerema-coordinated national observatory and local partners, it provides offshore context for a naturally embayed and partly protected coast exposed to southern Bay of Biscay swell.

Its current data source reports wave height, wave period, wave direction, directional spread and sea temperature.

Metrics are rows; days run left to right.
Saint-Jean-de-Luz wave buoy daily means Apr 2014Last observation shown
Metric
Mean significant wave height (ft)53453345754446422233444575QC rejected845
Mean maximum wave height (ft)8567557810866687433547768118171377
Mean peak period (s)1413101110101111131211111213121110121212141211141011121199
Mean average period (s)1412889910101211871012108510109131191281010978
Mean period Tm02 (s)111076888798657975477610879678766
Mean peak wave directionWNWconcentration 100%WNWconcentration 100%WNWconcentration 100%WNWconcentration 100%WNWconcentration 100%WNWconcentration 100%WNWconcentration 100%WNWconcentration 100%WNWconcentration 100%NWconcentration 99%NWconcentration 100%NWconcentration 100%NWconcentration 99%NWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 99%NWconcentration 100%NWconcentration 100%NNWconcentration 100%NWconcentration 100%NWconcentration 98%WNWconcentration 100%WNWconcentration 100%WNWconcentration 100%NWconcentration 99%NWconcentration 100%NWconcentration 100%WNWconcentration 100%
Mean directional spread (°)23.424.122.526.723.122.322.723.922.626.628.128.228.727.126.329.333.727.626.327.525.226.327.928.023.725.227.826.726.626.8
Mean water temperature(°C)------------------------------

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Wave metric colour key

Colours move through the scale as each number increases. They do not by themselves mean that conditions are good, safe or suitable for you.

Wave & swell height0–40+ ft
Wave & swell period0–22+ s
Wind speed0–75 mph

The displayed numbers remain the source of truth; colour is an additional visual cue.

What does buoy wave power mean?

kW/m means kilowatts of wave power per metre of wave crest. It describes the rate at which the observed sea state carries energy past the buoy.

Unlike the shore-directed forecast value, buoy wave power is the total power at the observation point. It is not projected towards a particular beach and does not predict breaking wave height.

In deep water, wave power can be calculated with:

P is approximately 0.49 times significant wave height squared times wave energy period.

P is power in kW/m, Hs is significant wave height in metres, and Te is wave energy period in seconds.

  • Provider-reported power is used when available.
  • Otherwise, a value is calculated only when both significant height and a genuine energy period are available. The ≈ symbol marks calculated values.
  • A dash is shown instead of substituting peak, Tm02, zero-crossing or other period measurements.
  • Daily and monthly figures use the mean of hourly-normalized observation power values; they are not calculated from mean height and period.

Wave direction, spectrum, water depth and local bathymetry still matter. Wave power is best read alongside height, period and direction rather than as a standalone surf-quality score.

The observation data displayed on this page is from the Cerema CANDHIS coastal wave observatory.

Learn how SurfHog combines, checks and summarizes observations in the data and methodology notes.

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