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Lowestoft wave buoy daily means for Dec 2019

Daily means from the Lowestoft wave buoy for Dec 2019, 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

1,485 wave-buoy observations covered all 31 days. Typical wave height was 2.7 ft (10th–90th percentile 1.3–5.6 ft), while mean average of more than one wave period type was 5.5 seconds (10th–90th percentile 4–6.9 seconds). Mean water temperature was 7.5°C (10th–90th percentile 7–8.2°C). 2 of 5,911 checked values (0%) were excluded by quality control. Across 3 comparable years, mean wave height was above the same-month mean of 2.7 ft and mean wave period was below the same-month mean of 5.9 seconds.

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

Typical Significant Wave Height

2.7ft
Mean: 3.2 ft
P10–P90: 1.3 — 5.6 ft
Recorded extremes

0.7 — 12.9 ft

Available for 742 of 743 hourly samples

Mean Observed Wave Period

5.5secs
P10–P90: 4 — 6.9secs
Recorded extremes

1.7 — 15.4secs

Available for 742 of 743 hourly samples

Observed Wave Direction

SE

Circular concentration: 70%

Mean Water Temperature

7.5°C
P10–P90: 7 — 8.2°C
Recorded extremes

6.8 — 8.7°C

Available for 742 of 743 hourly samples

Compared With Previous Decembers

Historical baseline from 4,418 observations across 3 years.

Wave Height
3.2ft
0.5ft above mean
Historical mean 2.723ft
Wave Period
5.5s
0.4s below mean
Historical mean 5.9s
Water Temperature
7.5°C
In line with the historical mean
Historical mean 7.5°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 Dec 2019Last observation shown
Metric
Mean significant wave height (ft)3321242546353343135643222432222
Mean maximum wave height (ft)54323748610494575249975343753443
Mean peak period (s)5764465679566666446665555665554
Mean zero-crossing period (s)4443354445454454345544444444444
Mean energy period (s)-------------------------------
Mean wave power, kilowatts per metre-------------------------------
Mean peak wave directionENEconcentration 86%NEconcentration 99%ENEconcentration 65%SSEconcentration 89%Sconcentration 86%Sconcentration 99%SSEconcentration 95%Sconcentration 99%NEconcentration 36%SEconcentration 60%SSEconcentration 99%Sconcentration 99%SEconcentration 86%Sconcentration 97%Sconcentration 99%SSEconcentration 99%ESEconcentration 86%SSEconcentration 98%SSEconcentration 99%SSEconcentration 98%SSEconcentration 99%SEconcentration 82%SSEconcentration 99%SSEconcentration 99%ENEconcentration 68%SEconcentration 69%ENEconcentration 91%Econcentration 76%Sconcentration 98%Sconcentration 99%ESEconcentration 91%
Mean directional spread (°)38.933.339.137.527.819.839.620.628.425.328.624.834.031.023.530.239.531.123.621.623.537.533.529.049.431.735.036.027.527.942.4
Mean water temperature(°C)8.38.18.18.07.98.08.08.28.07.87.77.67.67.57.47.37.27.17.37.37.47.37.37.37.27.27.17.17.06.96.9

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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