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Lowestoft wave buoy daily means for Jul 2025

Daily means from the Lowestoft wave buoy for Jul 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

1,482 wave-buoy observations covered all 31 days. Typical wave height was 1.7 ft (10th–90th percentile 0.9–2.8 ft), while mean peak wave period was 5.1 seconds (10th–90th percentile 3.5–6.7 seconds). Mean water temperature was 19.5°C (10th–90th percentile 18.9–20.1°C). All 5,921 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 the same as the same-month mean of 5.1 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 — 2.8 ft
Recorded extremes

0.5 — 4.5 ft

Mean Observed Wave Period

5.1secs
P10–P90: 3.5 — 6.7secs
Recorded extremes

1.7 — 10.5secs

Observed Wave Direction

ENE

Circular concentration: 55%

Mean Water Temperature

19.5°C
P10–P90: 18.9 — 20.1°C
Recorded extremes

18.6 — 20.4°C

Compared With Previous Julys

Historical baseline from 13,279 observations across 9 years.

Wave Height
1.8ft
0.2ft below mean
Historical mean 1.969ft
Wave Period
5.1s
In line with the historical mean
Historical mean 5.1s
Water Temperature
19.5°C
1.7°C above mean
Historical mean 17.8°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 Jul 2025Last observation shown
Metric
Mean significant wave height (ft)1222223321112232122221132111122
Mean maximum wave height (ft)2233435432123353222342243222233
Mean peak period (s)4565556766545565444555556546567
Mean zero-crossing period (s)3344344444334444333343344334444
Mean energy period (s)-------------------------------
Mean wave power, kilowatts per metre-------------------------------
Mean peak wave directionNEconcentration 62%NNEconcentration 96%NEconcentration 87%SSEconcentration 57%Sconcentration 99%SSEconcentration 87%NNEconcentration 97%NEconcentration 99%ENEconcentration 85%ENEconcentration 93%Econcentration 91%NEconcentration 92%NEconcentration 98%ESEconcentration 53%SSEconcentration 97%SEconcentration 43%ESEconcentration 66%SEconcentration 70%Econcentration 80%ESEconcentration 52%SSEconcentration 99%SEconcentration 93%Econcentration 49%NNEconcentration 99%ENEconcentration 72%Econcentration 66%NEconcentration 77%NEconcentration 97%NEconcentration 91%NEconcentration 98%NEconcentration 98%
Mean directional spread (°)42.137.037.327.527.137.630.135.846.945.349.041.536.534.529.234.542.438.839.532.729.340.139.633.539.944.644.040.044.837.138.6
Mean water temperature(°C)19.119.119.019.019.019.119.018.818.919.119.319.419.419.619.719.619.719.920.020.020.020.020.019.919.919.919.919.819.819.919.9

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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