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Seaford wave buoy daily means for Jun 2023

Daily means from the Seaford wave buoy for Jun 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

1,433 wave-buoy observations covered all 30 days. Typical wave height was 1 ft (10th–90th percentile 0.6–2.2 ft), while mean average of more than one wave period type was 5.3 seconds (10th–90th percentile 3.1–8.7 seconds). Mean water temperature was 16.6°C (10th–90th percentile 14.9–18°C). 8 of 5,725 checked values (0.1%) were excluded by quality control. Across 9 comparable years, mean wave height was below the same-month mean of 1.7 ft and mean wave period was the same as the same-month mean of 5.3 seconds.

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

Typical Significant Wave Height

1ft
Mean: 1.2 ft
P10–P90: 0.6 — 2.2 ft
Recorded extremes

0.4 — 5.9 ft

Mean Observed Wave Period

5.3secs
P10–P90: 3.1 — 8.7secs
Recorded extremes

1.7 — 13.3secs

Observed Wave Direction

SSW

Circular concentration: 65%

Mean Water Temperature

16.6°C
P10–P90: 14.9 — 18°C
Recorded extremes

14.3 — 19.4°C

Compared With Previous Junes

Historical baseline from 6,329 observations across 9 years.

Wave Height
1.2ft
0.5ft below mean
Historical mean 1.7ft
Wave Period
5.3s
In line with the historical mean
Historical mean 5.3s
Water Temperature
16.6°C
0.6°C above mean
Historical mean 16°C

Chart showing grouped wave observations for Seaford. 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 Seaford wave buoy

Seaford is a National Network Datawell Directional WaveRider in about 11 metres of water off East Sussex. First deployed on 22 January 2008, it records waves reaching Seaford Bay between Newhaven and Beachy Head and supports assessment of the town's exposed shingle frontage.

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.
Seaford wave buoy daily means Jun 2023Last observation shown
Metric
Mean significant wave height (ft)111111111111111111111121232213
Mean maximum wave height (ft)221122222122111111222222254326
Mean peak period (s)65545554455455691010644546755445
Mean zero-crossing period (s)333344433333333344333334443334
Mean energy period (s)------------------------------
Mean reported period (s)--4344333333333344333334444334
Mean wave power, kilowatts per metre------------------------------
Mean peak wave directionSEconcentration 93%SEconcentration 99%SSEconcentration 89%SEconcentration 80%SSEconcentration 97%SSEconcentration 97%SEconcentration 98%ESEconcentration 78%SEconcentration 76%Sconcentration 76%SWconcentration 93%SWconcentration 98%SSWconcentration 70%Sconcentration 65%SSWconcentration 67%SWconcentration 84%SSWconcentration 76%SWconcentration 94%WSWconcentration 95%SSWconcentration 71%WSWconcentration 96%WSWconcentration 97%WSWconcentration 95%WSWconcentration 94%WSWconcentration 98%WSWconcentration 99%WSWconcentration 99%WSWconcentration 99%WSWconcentration 98%SWconcentration 99%
Mean directional spread (°)28.928.432.430.431.031.429.329.531.039.634.830.034.039.337.249.450.453.234.329.032.430.726.732.332.117.719.322.125.020.0
Mean reported wave direction--SEconcentration 100%SEconcentration 80%SEconcentration 95%SSEconcentration 97%SEconcentration 94%SEconcentration 81%SEconcentration 76%Sconcentration 77%SWconcentration 92%SWconcentration 98%SSWconcentration 70%SSWconcentration 65%SSWconcentration 64%SWconcentration 83%SSWconcentration 74%SWconcentration 87%WSWconcentration 94%SSWconcentration 70%WSWconcentration 96%WSWconcentration 96%WSWconcentration 95%WSWconcentration 96%WSWconcentration 98%WSWconcentration 99%WSWconcentration 99%WSWconcentration 99%WSWconcentration 97%SWconcentration 99%
Mean water temperature(°C)14.614.714.814.915.015.115.215.215.415.916.416.316.416.516.816.917.017.117.317.317.617.617.718.118.118.118.017.817.516.8

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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