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Weymouth wave buoy daily means for Jul 2026

Daily means from the Weymouth wave buoy for Jul 2026, 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

1,488 wave-buoy observations covered all 31 days. Typical wave height was 0.7 ft (10th–90th percentile 0.3–1.8 ft), while mean reported wave period; measurement type unavailable was 3.3 seconds (10th–90th percentile 2–4 seconds). Mean water temperature was 19.5°C (10th–90th percentile 17.8–20.8°C). All 5,952 checked values passed quality control. Across 12 comparable years, mean wave height was below the same-month mean of 1 ft and mean wave period was below the same-month mean of 4.4 seconds.

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

Typical Wave Height

0.7ft
Mean: 0.9 ft
P10–P90: 0.3 — 1.8 ft
Recorded extremes

0.2 — 3.7 ft

Mean Wave Period

3.3secs
P10–P90: 2 — 4secs
Recorded extremes

2 — 5secs

Wave Direction

SSE

Circular concentration: 87%

Mean Water Temperature

19.5°C
P10–P90: 17.8 — 20.8°C
Recorded extremes

17.3 — 22.1°C

Compared With Previous Julys

Historical baseline from 10,868 observations across 12 years.

Wave Height
0.9ft
0.1ft below mean
Historical mean 1ft
Wave Period
3.3s
1.1s below mean
Historical mean 4.4s
Water Temperature
19.5°C
1.9°C above mean
Historical mean 17.6°C

Chart showing grouped wave observations for Weymouth. 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 Weymouth wave buoy

Weymouth is a Datawell Directional WaveRider station off the Dorset coast. First deployed in December 2006, it records the relatively sheltered wave climate around Weymouth Bay and the approaches east of Portland. Available observations include wave height, period and direction, sea temperature and calculated wave power.

Metrics are rows; days run left to right.
Weymouth wave buoy daily means Jul 2026Last observation shown
Metric
Mean wave height (ft)1111110001123221111110101111111
Mean observed period(s)4Reported4Reported4Reported3Reported4Reported3Reported3Reported3Reported3Reported3Reported3Reported4Reported4Reported4Reported3Reported4Reported4Reported3Reported3Reported3Reported4Reported3Reported2Reported3Reported3Reported3Reported4Reported3Reported3Reported3Reported3Reported
Mean wave power(kW/m)-------------------------------
Mean wave directionSSEconcentration 96%SSEconcentration 97%SSEconcentration 96%Sconcentration 88%SSEconcentration 99%SSEconcentration 99%SSEconcentration 96%SEconcentration 70%SEconcentration 95%SEconcentration 96%SEconcentration 100%SEconcentration 99%SEconcentration 100%SEconcentration 99%ESEconcentration 87%SEconcentration 99%SEconcentration 98%SEconcentration 84%SEconcentration 98%SEconcentration 98%SEconcentration 99%SSEconcentration 97%ESEconcentration 87%SEconcentration 96%Sconcentration 55%Sconcentration 75%Sconcentration 90%SSEconcentration 100%SSEconcentration 91%SSEconcentration 97%Sconcentration 85%
Mean water temperature(°C)17.717.517.717.918.118.518.819.220.420.819.519.119.019.219.419.820.019.720.019.820.020.220.220.620.319.819.920.721.120.620.2

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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.

Which wave period is shown?

The table shows the best period measurement supplied for each observation. It is not necessarily the energy period used to calculate wave power.

Tp
Peak period: the period at the strongest spectral peak.
Tavg
The provider's average wave period.
Tm02
A mean period calculated from the wave spectrum.
Tz
Mean zero-crossing period.
Reported
A legacy value whose period type was not recorded.
Mixed
A daily or monthly mean containing more than one period type.

Wave power needs a genuine energy period (Te). SurfHog does not substitute Tp, Tavg, Tm02 or Tz when Te is missing.

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.

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