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Happisburgh wave buoy daily means for Feb 2025

Daily means from the Happisburgh wave buoy for Feb 2025, 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

1,344 wave-buoy observations covered all 28 days. Typical wave height was 1.8 ft (10th–90th percentile 0.7–5.5 ft), while mean average of more than one wave period type was 6.8 seconds (10th–90th percentile 4.1–9.6 seconds). Mean water temperature was 4.9°C (10th–90th percentile 4.4–5.6°C). 19 of 5,336 checked values (0.4%) were excluded by quality control. Across 11 comparable years, mean wave height was the same as the same-month mean of 2.5 ft and mean wave period was below the same-month mean of 7.2 seconds.

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

Typical Significant Wave Height

1.8ft
Mean: 2.5 ft
P10–P90: 0.7 — 5.5 ft
Recorded extremes

0.4 — 8.4 ft

Mean Observed Wave Period

6.8secs
P10–P90: 4.1 — 9.6secs
Recorded extremes

1.7 — 22.2secs

Available for 669 of 672 hourly samples

Observed Wave Direction

ENE

Circular concentration: 86%

Mean Water Temperature

4.9°C
P10–P90: 4.4 — 5.6°C
Recorded extremes

4 — 6.1°C

Compared With Previous Februarys

Historical baseline from 14,760 observations across 11 years.

Wave Height
2.5ft
0ft above mean
Historical mean 2.461ft
Wave Period
6.8s
0.4s below mean
Historical mean 7.2s
Water Temperature
4.9°C
0.4°C below mean
Historical mean 5.3°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 Feb 2025Last observation shown
Metric
Mean significant wave height (ft)1111127447644223334211111132
Mean peak period (s)84855577689876555566577617956
Mean zero-crossing period (s)4334445545554444445434344444
Mean peak wave directionNNEconcentration 95%Econcentration 99%ENEconcentration 84%Econcentration 98%NNEconcentration 84%NEconcentration 86%ENEconcentration 99%ENEconcentration 99%NEconcentration 99%NEconcentration 99%NEconcentration 99%NEconcentration 99%NEconcentration 99%NEconcentration 92%Econcentration 98%Econcentration 99%ENEconcentration 98%ENEconcentration 98%Econcentration 99%Econcentration 97%Econcentration 98%Econcentration 87%ENEconcentration 78%Econcentration 94%NNEconcentration 79%ENEconcentration 85%Nconcentration 92%NNEconcentration 96%
Mean directional spread (°)30.325.845.328.036.932.419.521.022.923.624.022.123.025.524.621.327.621.818.624.524.534.728.726.658.739.823.429.4
Mean water temperature(°C)5.25.14.94.94.94.94.84.84.84.84.84.84.84.74.64.54.44.34.24.34.75.05.15.55.65.75.75.9

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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