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Hornsea wave buoy daily means for Jul 2020

Daily means from the Hornsea wave buoy for Jul 2020, 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 1.5 ft (10th–90th percentile 0.7–3 ft), while mean average of more than one wave period type was 6.1 seconds (10th–90th percentile 2.2–10.3 seconds). Mean water temperature was 14.1°C (10th–90th percentile 13.5–14.8°C). 18 of 5,892 checked values (0.3%) were excluded by quality control. Across 10 comparable years, mean wave height was below the same-month mean of 1.9 ft and mean wave period was above the same-month mean of 5.7 seconds.

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

Typical Significant Wave Height

1.5ft
Mean: 1.7 ft
P10–P90: 0.7 — 3 ft
Recorded extremes

0.3 — 5.2 ft

Mean Observed Wave Period

6.1secs
P10–P90: 2.2 — 10.3secs
Recorded extremes

1.7 — 13.3secs

Available for 742 of 744 hourly samples

Observed Wave Direction

NNE

Circular concentration: 43%

Mean Water Temperature

14.1°C
P10–P90: 13.5 — 14.8°C
Recorded extremes

13.3 — 15°C

Compared With Previous Julys

Historical baseline from 14,756 observations across 10 years.

Wave Height
1.7ft
0.2ft below mean
Historical mean 1.87ft
Wave Period
6.1s
0.4s above mean
Historical mean 5.7s
Water Temperature
14.1°C
0.3°C below mean
Historical mean 14.4°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 2020Last observation shown
Metric
Mean significant wave height (ft)2332323242211111111111111122322
Mean maximum wave height (ft)3543435363222111112221112243424
Mean peak period (s)111058451085678653551065454344531086
Mean zero-crossing period (s)8533336545443333333333333333543
Mean energy period (s)-------------------------------
Mean wave power, kilowatts per metre-------------------------------
Mean peak wave directionNNEconcentration 99%NNEconcentration 99%Variableconcentration 20%NEconcentration 66%WSWconcentration 80%NNWconcentration 61%NNEconcentration 99%NNEconcentration 99%Econcentration 99%Econcentration 97%NNEconcentration 93%NEconcentration 69%Nconcentration 44%Nconcentration 78%Wconcentration 61%Nconcentration 55%Wconcentration 31%NNEconcentration 51%NNEconcentration 99%Nconcentration 87%Nconcentration 72%NEconcentration 53%ESEconcentration 45%Variableconcentration 9%ESEconcentration 72%Variableconcentration 13%SEconcentration 59%Wconcentration 71%NNEconcentration 100%NNEconcentration 93%Econcentration 74%
Mean directional spread (°)12.713.322.824.520.120.116.117.325.828.521.319.423.425.123.622.826.332.824.725.624.630.629.730.125.826.819.020.816.519.720.2
Mean water temperature(°C)13.713.713.613.613.613.513.513.613.613.613.713.813.914.014.114.314.514.514.614.614.514.514.514.514.614.614.714.614.414.514.7

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 Regional Coastal Monitoring Programme.

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

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