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Cabo Silleiro wave buoy daily means for Aug 2026

Daily means from the Cabo Silleiro wave buoy for Aug 2026, including available wave height, period, direction, wind and sea temperature data.

Last observation shown

Data available:  to 

Monthly means for

Latest

Typical Significant Wave Height

4.6ft
Mean: 4.8 ft
P10–P90: 2.2 — 7.3 ft
Recorded extremes

1.5 — 8.1 ft

Mean Observed Wave Period

7.8secs
P10–P90: 5.3 — 11.1secs
Recorded extremes

4.1 — 15.4secs

Available for 156 of 159 hourly samples

Typical Observed Wind

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

Available for 0 of 159 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 159 hourly samples

Chart showing grouped wave observations for Cabo Silleiro. 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 Cabo Silleiro wave buoy

Cabo Silleiro is a Puertos del Estado REDEXT deep-water buoy west of the headland that marks the southern entrance to the Rías Baixas. Its offshore position represents Atlantic conditions approaching southern Galicia and northern Portugal before local bathymetry, islands and estuaries modify them.

Its current data source reports wave height, wave period and wave direction.

Metrics are rows; days run left to right.
Cabo Silleiro wave buoy daily means Aug 2026Last observation shown
Metric
Mean significant wave height (ft)--------------75542576---------
Mean maximum wave height (ft)--------------00000000---------
Mean peak period (s)--------------7776891110---------
Mean period Tm02 (s)--------------55545576---------
Mean peak wave direction--------------NNWconcentration 99%NNWconcentration 99%NNWconcentration 100%NNWconcentration 100%WNWconcentration 60%NNWconcentration 98%NNWconcentration 100%NNWconcentration 100%---------
Mean wave direction--------------NNWconcentration 100%NNWconcentration 100%NNWconcentration 100%NNWconcentration 99%NWconcentration 93%NWconcentration 99%NNWconcentration 100%NNWconcentration 100%---------

Swipe sideways to see more days.

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 Puertos del Estado Portus network.

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

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