Skip to content
Surfhog home
Menu

Hornsea wave buoy daily means for Jul 2023

Daily means from the Hornsea wave buoy for Jul 2023, 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

1,484 wave-buoy observations covered all 31 days. Typical wave height was 1.7 ft (10th–90th percentile 1–3.1 ft), while mean average of more than one wave period type was 6.2 seconds (10th–90th percentile 2.4–10.3 seconds). Mean water temperature was 14.8°C (10th–90th percentile 14.3–15.3°C). 12 of 5,914 checked values (0.2%) were excluded by quality control. Across 13 comparable years, mean wave height was above the same-month mean of 1.8 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

1.7ft
Mean: 1.9 ft
P10–P90: 1 — 3.1 ft
Recorded extremes

0.6 — 6.3 ft

Mean Observed Wave Period

6.2secs
P10–P90: 2.4 — 10.3secs
Recorded extremes

1.8 — 14.3secs

Available for 743 of 744 hourly samples

Observed Wave Direction

NE

Circular concentration: 35%

Mean Water Temperature

14.8°C
P10–P90: 14.3 — 15.3°C
Recorded extremes

13.8 — 16.1°C

Compared With Previous Julys

Historical baseline from 19,206 observations across 13 years.

Wave Height
1.9ft
0.1ft above mean
Historical mean 1.837ft
Wave Period
6.2s
0.5s above mean
Historical mean 5.7s
Water Temperature
14.8°C
0.3°C above mean
Historical mean 14.5°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 2023Last observation shown
Metric
Mean significant wave height (ft)22222222112112QC rejected2112222343331111
Mean maximum wave height (ft)2323433422221454222332475542222
Mean peak period (s)34612101175544246643891096678897433
Mean zero-crossing period (s)3335553443323443345644455554333
Mean energy period (s)-------------------------------
Mean wave power, kilowatts per metre-------------------------------
Mean peak wave directionWconcentration 82%WNWconcentration 69%Nconcentration 66%NNEconcentration 100%NNEconcentration 97%NNEconcentration 100%ENEconcentration 70%ESEconcentration 98%Econcentration 100%ESEconcentration 83%SEconcentration 97%WSWconcentration 88%Variableconcentration 30%Econcentration 55%ESEconcentration 98%SSWconcentration 67%SSWconcentration 48%NNEconcentration 88%NNEconcentration 100%NNEconcentration 100%NNEconcentration 100%ENEconcentration 53%ENEconcentration 69%NNEconcentration 99%NNEconcentration 100%NNEconcentration 100%NNEconcentration 99%NNEconcentration 100%WSWconcentration 36%SWconcentration 67%SSWconcentration 73%
Mean directional spread (°)21.323.024.320.922.720.523.922.221.926.119.823.024.920.619.522.828.124.517.417.617.523.129.316.615.113.313.522.025.125.026.1
Mean water temperature(°C)14.614.414.314.214.214.314.414.514.614.714.714.714.814.814.914.914.914.914.914.914.914.914.914.915.015.015.215.615.515.415.3

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.

› Wave Buoy List