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Lowestoft wave buoy daily means for Nov 2021

Daily means from the Lowestoft wave buoy for Nov 2021, 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 2.2 ft (10th–90th percentile 1.1–4.5 ft), while mean average of more than one wave period type was 6 seconds (10th–90th percentile 4–7.7 seconds). Mean water temperature was 11°C (10th–90th percentile 9.3–12.4°C). 6 of 5,727 checked values (0.1%) were excluded by quality control. Across 5 comparable years, mean wave height was below the same-month mean of 3.4 ft and mean wave period was above the same-month mean of 5.9 seconds.

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

Typical Significant Wave Height

2.2ft
Mean: 2.5 ft
P10–P90: 1.1 — 4.5 ft
Recorded extremes

0.6 — 7.2 ft

Mean Observed Wave Period

6secs
P10–P90: 4 — 7.7secs
Recorded extremes

1.8 — 18.2secs

Available for 719 of 720 hourly samples

Observed Wave Direction

ENE

Circular concentration: 55%

Mean Water Temperature

11°C
P10–P90: 9.3 — 12.4°C
Recorded extremes

8.3 — 13.4°C

Compared With Previous Novembers

Historical baseline from 6,313 observations across 5 years.

Wave Height
2.5ft
0.9ft below mean
Historical mean 3.412ft
Wave Period
6s
0.1s above mean
Historical mean 5.9s
Water Temperature
11°C
0.7°C above mean
Historical mean 10.3°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 Nov 2021Last observation shown
Metric
Mean significant wave height (ft)412432322114232112114521334543
Mean maximum wave height (ft)722744433216443223226732447864
Mean peak period (s)665676774485556555686666668786
Mean zero-crossing period (s)443454453334444333444454444554
Mean energy period (s)------------------------------
Mean wave power, kilowatts per metre------------------------------
Mean peak wave directionSconcentration 99%Econcentration 69%NEconcentration 90%NNEconcentration 99%NEconcentration 98%SEconcentration 67%ENEconcentration 49%NEconcentration 80%SSEconcentration 97%SSEconcentration 95%ESEconcentration 61%Sconcentration 99%NEconcentration 50%NEconcentration 99%NEconcentration 99%ENEconcentration 57%ENEconcentration 34%SEconcentration 68%ESEconcentration 64%ENEconcentration 65%NNEconcentration 98%NEconcentration 100%NEconcentration 99%NEconcentration 99%NNEconcentration 97%Econcentration 43%NNEconcentration 99%NEconcentration 100%NEconcentration 100%SEconcentration 73%
Mean directional spread (°)23.749.044.131.239.633.243.939.131.438.346.120.138.933.234.839.739.641.449.749.731.332.438.744.534.941.134.128.129.851.3
Mean water temperature(°C)13.112.912.612.312.011.811.611.411.411.311.311.411.311.311.311.211.111.010.910.810.610.310.310.19.99.79.39.18.78.6

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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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