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Hornsea wave buoy daily means for Jul 2017

Daily means from the Hornsea wave buoy for Jul 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

1,488 wave-buoy observations covered all 31 days. Typical wave height was 1.5 ft (10th–90th percentile 0.8–3.6 ft), while mean average of more than one wave period type was 4.9 seconds (10th–90th percentile 2.3–7.1 seconds). Mean water temperature was 14.4°C (10th–90th percentile 13.7–15°C). 5 of 5,808 checked values (0.1%) were excluded by quality control. Across 7 comparable years, mean wave height was the same as the same-month mean of 1.9 ft and mean wave period was below the same-month mean of 5.9 seconds.

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

Typical Significant Wave Height

1.5ft
Mean: 1.9 ft
P10–P90: 0.8 — 3.6 ft
Recorded extremes

0.5 — 5.9 ft

Mean Observed Wave Period

4.9secs
P10–P90: 2.3 — 7.1secs
Recorded extremes

1.7 — 12.5secs

Available for 743 of 744 hourly samples

Observed Wave Direction

ENE

Circular concentration: 49%

Mean Water Temperature

14.4°C
P10–P90: 13.7 — 15°C
Recorded extremes

13 — 15.6°C

Available for 686 of 744 hourly samples

Compared With Previous Julys

Historical baseline from 10,305 observations across 7 years.

Wave Height
1.9ft
0ft above mean
Historical mean 1.87ft
Wave Period
4.9s
1s below mean
Historical mean 5.9s
Water Temperature
14.4°C
0.2°C above mean
Historical mean 14.2°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 Jul 2017Last observation shown
Metric
Mean significant wave height (ft)32112211111QC rejected2111114333243212212
Mean maximum wave height (ft)5222332211254221127445365422212
Mean peak period (s)7767645544366553346756577533433
Mean zero-crossing period (s)4444443333344333334444444433333
Mean energy period (s)-------------------------------
Mean wave power, kilowatts per metre-------------------------------
Mean peak wave directionNNEconcentration 99%NNEconcentration 99%NNWconcentration 50%NNEconcentration 100%NNEconcentration 96%Econcentration 87%Econcentration 65%Nconcentration 88%ESEconcentration 76%ESEconcentration 98%NNWconcentration 55%NNEconcentration 99%NEconcentration 87%Nconcentration 76%NEconcentration 40%Variableconcentration 26%Variableconcentration 22%ESEconcentration 85%Econcentration 100%ENEconcentration 100%ESEconcentration 82%Econcentration 97%ENEconcentration 98%NNEconcentration 97%NNEconcentration 100%Econcentration 76%Sconcentration 72%Sconcentration 79%Sconcentration 76%Sconcentration 40%SSEconcentration 89%
Mean directional spread (°)18.918.518.619.921.225.927.523.125.926.727.320.119.922.224.930.430.727.019.719.319.721.725.019.217.724.727.325.122.625.321.2
Mean water temperature(°C)13.413.113.513.713.713.914.114.114.214.414.314.314.414.414.414.614.814.915.015.014.914.915.114.714.514.514.514.614.714.814.8

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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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