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Hornsea wave buoy daily means for Aug 2017

Daily means from the Hornsea wave buoy for Aug 2017, 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

1,487 wave-buoy observations covered all 31 days. Typical wave height was 1.4 ft (10th–90th percentile 0.7–2.6 ft), while mean average of more than one wave period type was 6.1 seconds (10th–90th percentile 2.4–10.4 seconds). Mean water temperature was 15°C (10th–90th percentile 14.8–15.2°C). 6 of 5,848 checked values (0.1%) were excluded by quality control. Across 7 comparable years, mean wave height was below the same-month mean of 2 ft and mean wave period was above the same-month mean of 6 seconds.

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

Typical Significant Wave Height

1.4ft
Mean: 1.7 ft
P10–P90: 0.7 — 2.6 ft
Recorded extremes

0.5 — 6.6 ft

Mean Observed Wave Period

6.1secs
P10–P90: 2.4 — 10.4secs
Recorded extremes

1.7 — 13.3secs

Observed Wave Direction

NE

Circular concentration: 49%

Mean Water Temperature

15°C
P10–P90: 14.8 — 15.2°C
Recorded extremes

14.4 — 15.7°C

Available for 721 of 744 hourly samples

Compared With Previous Augusts

Historical baseline from 10,279 observations across 7 years.

Wave Height
1.7ft
0.3ft below mean
Historical mean 2.001ft
Wave Period
6.1s
0.1s above mean
Historical mean 6s
Water Temperature
15°C
In line with the historical mean
Historical mean 15°C

Chart showing grouped wave observations for Hornsea. 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 Hornsea wave buoy

Hornsea is a Channel Coastal Observatory wave station off the rapidly eroding Holderness coast of East Yorkshire. Its North Sea record provides local wave context for Hornsea's defended frontage and the adjacent soft-cliff coastline, where storms drive substantial shoreline change.

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

Metrics are rows; days run left to right.
Hornsea wave buoy daily means Aug 2017Last observation shown
Metric
Mean significant wave height (ft)12222212QC rejectedQC rejected211221212122321111111
Mean maximum wave height (ft)1243332396212332222233421121211
Mean peak period (s)49646886786369711533489856564489
Mean zero-crossing period (s)3333443455334335333355443333333
Mean energy period (s)-------------------------------
Mean wave power, kilowatts per metre-------------------------------
Mean peak wave directionSSEconcentration 61%NEconcentration 74%SEconcentration 53%Wconcentration 49%Nconcentration 70%NNEconcentration 100%NNEconcentration 100%NNEconcentration 96%NEconcentration 99%NNEconcentration 100%NEconcentration 36%Variableconcentration 22%NNEconcentration 98%NNEconcentration 93%ENEconcentration 71%NNEconcentration 100%SEconcentration 84%SSWconcentration 45%WSWconcentration 85%NWconcentration 56%NNEconcentration 100%NNEconcentration 100%ENEconcentration 85%ENEconcentration 63%NEconcentration 60%ENEconcentration 67%NNEconcentration 77%SEconcentration 57%ENEconcentration 69%NNEconcentration 71%NEconcentration 72%
Mean directional spread (°)22.117.218.524.819.115.620.922.018.815.525.327.719.619.623.218.317.521.122.323.317.818.219.525.424.027.219.023.825.630.335.6
Mean water temperature(°C)15.015.015.115.015.015.015.015.014.814.814.814.814.615.015.115.115.215.014.914.814.814.915.015.015.015.015.015.115.115.115.1

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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 Regional Coastal Monitoring Programme.

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

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