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Saint-Jean-de-Luz wave buoy daily means for Dec 2018

Daily means from the Saint-Jean-de-Luz wave buoy for Dec 2018, 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

1,488 wave-buoy observations covered all 31 days. Typical wave height was 5.8 ft (10th–90th percentile 1.7–11.1 ft), while mean peak wave period was 12.7 seconds (10th–90th percentile 10.2–15.6 seconds). Typical calculated wave power was approximately 16.6 kW/m (10th–90th percentile 1.3–73.6 kW/m), derived from significant wave height and energy period. 3 of 4,464 checked values (0.1%) were excluded by quality control. Across 5 comparable years, mean wave height was below the same-month mean of 6.9 ft and mean wave period was below the same-month mean of 12.9 seconds.

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

Typical Significant Wave Height

5.8ft
Mean: 6.2 ft
P10–P90: 1.7 — 11.1 ft
Recorded extremes

1 — 18.7 ft

Mean Observed Wave Period

12.7secs
P10–P90: 10.2 — 15.6secs
Recorded extremes

4.7 — 23.5secs

Typical Wave Power

Approximately 16.62kW/m
Mean: 28.24kW/m
P10–P90: 1.31 — 73.6kW/m
Recorded extremes

0.45 — 234.65kW/m

Calculated from significant wave height and energy period.

Typical Observed Wind

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

Available for 0 of 744 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 744 hourly samples

Compared With Previous Decembers

Historical baseline from 6,478 observations across 5 years.

Wave Height
6.2ft
0.7ft below mean
Historical mean 6.89ft
Wave Period
12.7s
0.2s below mean
Historical mean 12.9s
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 Dec 2018Last observation shown
Metric
Mean significant wave height (ft)77553459QC rejected1345913910869987553112222
Mean maximum wave height (ft)1110885771420187814191315121014141210885223433
Mean peak period (s)131212141299121315131616161814131314141211111312111014121110
Mean average period (s)12111011988101214111112131613111312131210101211109991010
Mean period Tm02 (s)9988766891087991210811910108898766667
Mean peak wave directionNWconcentration 99%NWconcentration 99%NWconcentration 100%WNWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 99%WNWconcentration 100%NWconcentration 99%NWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 99%WNWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 99%WNWconcentration 100%NWconcentration 100%WNWconcentration 100%NWconcentration 100%WNWconcentration 100%NWconcentration 100%NWconcentration 100%NWconcentration 100%
Mean directional spread (°)26.425.826.728.427.526.026.428.831.130.027.633.431.032.927.931.428.426.829.128.526.125.926.228.929.328.228.730.026.526.325.8
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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