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Happisburgh wave buoy daily means for Aug 2018

Daily means from the Happisburgh wave buoy for Aug 2018, 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

1,461 wave-buoy observations covered all 31 days. Typical wave height was 1.2 ft (10th–90th percentile 0.7–2.1 ft), while mean average of more than one wave period type was 5.1 seconds (10th–90th percentile 3.3–7.7 seconds). Mean water temperature was 19.7°C (10th–90th percentile 18–20.9°C). 4 of 5,819 checked values (0.1%) were excluded by quality control. Across 5 comparable years, mean wave height was below the same-month mean of 1.6 ft and mean wave period was below the same-month mean of 5.5 seconds.

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

Typical Significant Wave Height

1.2ft
Mean: 1.3 ft
P10–P90: 0.7 — 2.1 ft
Recorded extremes

0.3 — 4.7 ft

Mean Observed Wave Period

5.1secs
P10–P90: 3.3 — 7.7secs
Recorded extremes

1.7 — 11.1secs

Observed Wave Direction

NE

Circular concentration: 74%

Mean Water Temperature

19.7°C
P10–P90: 18 — 20.9°C
Recorded extremes

17.6 — 21.4°C

Available for 742 of 743 hourly samples

Compared With Previous Augusts

Historical baseline from 5,971 observations across 5 years.

Wave Height
1.3ft
0.3ft below mean
Historical mean 1.64ft
Wave Period
5.1s
0.4s below mean
Historical mean 5.5s
Water Temperature
19.7°C
1.4°C above mean
Historical mean 18.3°C

Chart showing grouped wave observations for Happisburgh. 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 Happisburgh wave buoy

Happisburgh is a Channel Coastal Observatory wave station off the northeast Norfolk coast. It supplies a nearshore North Sea record for one of England's most rapidly changing soft-cliff frontages, where communities, beaches and coastal defences are exposed to frequent erosion.

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

Metrics are rows; days run left to right.
Happisburgh wave buoy daily means Aug 2018Last observation shown
Metric
Mean significant wave height (ft)1102111221211211111111123221121
Mean peak period (s)3344543456555665445587456859656
Mean zero-crossing period (s)3333333334443444343454344544344
Mean peak wave directionEconcentration 80%Econcentration 91%NEconcentration 84%Nconcentration 91%NNEconcentration 73%Econcentration 92%ESEconcentration 88%NNEconcentration 70%NEconcentration 92%NEconcentration 92%NNEconcentration 81%Econcentration 99%NNEconcentration 93%NNEconcentration 90%NEconcentration 89%Econcentration 97%Nconcentration 81%NNEconcentration 83%NEconcentration 68%Nconcentration 98%NEconcentration 91%NEconcentration 80%Nconcentration 71%NNWconcentration 98%Nconcentration 96%NEconcentration 80%Nconcentration 90%NNEconcentration 87%NNEconcentration 82%NNEconcentration 95%NNEconcentration 99%
Mean directional spread (°)34.134.241.328.532.030.828.329.729.830.931.433.036.426.733.733.340.743.139.031.429.032.634.723.421.724.733.939.035.035.530.1
Mean water temperature(°C)20.220.420.620.720.820.921.121.120.820.420.019.919.919.819.819.719.519.419.319.419.619.819.719.418.918.618.318.118.017.817.9

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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