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Lowestoft wave buoy daily means for Jun 2025

Daily means from the Lowestoft wave buoy for Jun 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

1,436 wave-buoy observations covered all 30 days. Typical wave height was 1.7 ft (10th–90th percentile 0.9–2.9 ft), while mean average of more than one wave period type was 4.7 seconds (10th–90th percentile 3–6 seconds). Mean water temperature was 16.5°C (10th–90th percentile 14.9–18.3°C). All 5,734 checked values passed quality control. Across 9 comparable years, mean wave height was below the same-month mean of 2 ft and mean wave period was below the same-month mean of 5 seconds.

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

Typical Significant Wave Height

1.7ft
Mean: 1.8 ft
P10–P90: 0.9 — 2.9 ft
Recorded extremes

0.5 — 5.4 ft

Mean Observed Wave Period

4.7secs
P10–P90: 3 — 6secs
Recorded extremes

1.8 — 7.1secs

Observed Wave Direction

SE

Circular concentration: 71%

Mean Water Temperature

16.5°C
P10–P90: 14.9 — 18.3°C
Recorded extremes

14.4 — 19.3°C

Compared With Previous Junes

Historical baseline from 12,819 observations across 9 years.

Wave Height
1.8ft
0.2ft below mean
Historical mean 2.034ft
Wave Period
4.7s
0.3s below mean
Historical mean 5s
Water Temperature
16.5°C
1.4°C above mean
Historical mean 15.1°C

Chart showing grouped wave observations for Lowestoft. 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 Lowestoft wave buoy

Lowestoft is a Channel Coastal Observatory wave station off the Suffolk coast at Britain's most easterly town. Its North Sea observations provide local context for the harbour approaches, developed seafront and low-lying coastline around Lowestoft and northern Suffolk.

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.
Lowestoft wave buoy daily means Jun 2025Last observation shown
Metric
Mean significant wave height (ft)124232222224221111111222222211
Mean maximum wave height (ft)226354333436232121222344333322
Mean peak period (s)456555555555654434343466545554
Mean zero-crossing period (s)334444434444443333333344434433
Mean energy period (s)------------------------------
Mean wave power, kilowatts per metre------------------------------
Mean peak wave directionSSEconcentration 74%SEconcentration 66%Sconcentration 99%SSEconcentration 99%Sconcentration 99%Sconcentration 99%SSEconcentration 98%Econcentration 32%SSEconcentration 77%SSEconcentration 65%ENEconcentration 90%ENEconcentration 97%NEconcentration 98%ESEconcentration 58%SSEconcentration 97%SSEconcentration 96%SSEconcentration 97%ESEconcentration 68%ESEconcentration 89%Econcentration 93%SEconcentration 91%SSEconcentration 97%SEconcentration 81%SSEconcentration 88%SEconcentration 94%SSEconcentration 69%SSEconcentration 93%SSEconcentration 98%SEconcentration 84%Econcentration 83%
Mean directional spread (°)36.646.820.829.722.428.232.940.140.136.942.831.936.434.138.045.235.447.038.642.545.129.642.036.041.035.535.329.741.243.5
Mean water temperature(°C)14.914.914.914.914.915.015.115.015.115.215.315.515.916.116.316.516.717.017.117.317.517.717.717.717.918.018.118.418.618.8

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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