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Sandown Bay wave buoy daily means for Jul 2026

Daily means from the Sandown Bay 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

1,471 wave-buoy observations covered all 31 days. Typical wave height was 0.9 ft (10th–90th percentile 0.4–2 ft), while mean average of more than one wave period type was 4.3 seconds (10th–90th percentile 2.7–5.8 seconds). Mean water temperature was 20.2°C (10th–90th percentile 18.6–21.1°C). All 5,878 checked values passed quality control. Across 16 comparable years, mean wave height was the same as the same-month mean of 1.1 ft and mean wave period was below the same-month mean of 4.8 seconds.

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

Typical Significant Wave Height

0.9ft
Mean: 1.1 ft
P10–P90: 0.4 — 2 ft
Recorded extremes

0.2 — 4.1 ft

Mean Observed Wave Period

4.3secs
P10–P90: 2.7 — 5.8secs
Recorded extremes

1.7 — 11.8secs

Observed Wave Direction

SSE

Circular concentration: 85%

Mean Water Temperature

20.2°C
P10–P90: 18.6 — 21.1°C
Recorded extremes

18.1 — 21.4°C

Compared With Previous Julys

Historical baseline from 23,348 observations across 16 years.

Wave Height
1.1ft
0ft below mean
Historical mean 1.148ft
Wave Period
4.3s
0.5s below mean
Historical mean 4.8s
Water Temperature
20.2°C
2.2°C above mean
Historical mean 18°C

Chart showing grouped wave observations for Sandown Bay. 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 Sandown Bay wave buoy

Sandown Bay is a Channel Coastal Observatory National Network wave station off the east coast of the Isle of Wight. Its nearshore record represents conditions entering the bay between Culver Down and Dunnose, helping monitor a developed and erosion-sensitive frontage exposed to English Channel seas.

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.
Sandown Bay wave buoy daily means Jul 2026Last observation shown
Metric
Mean significant wave height (ft)1111111001233222111111111111111
Mean maximum wave height (ft)1211111111345333212111111221111
Mean peak period (s)6645433444555555544443334554444
Mean zero-crossing period (s)4433333333344434433333333343333
Mean energy period (s)-------------------------------
Mean wave power, kilowatts per metre-------------------------------
Mean peak wave directionSconcentration 98%Sconcentration 100%Sconcentration 95%Sconcentration 98%Sconcentration 99%Sconcentration 99%Sconcentration 94%SSEconcentration 93%SEconcentration 98%ESEconcentration 97%ESEconcentration 99%ESEconcentration 98%ESEconcentration 98%SEconcentration 98%ESEconcentration 96%SEconcentration 96%SSEconcentration 94%SEconcentration 94%SEconcentration 94%SEconcentration 97%SEconcentration 95%Sconcentration 94%SEconcentration 92%SSEconcentration 88%Sconcentration 81%Sconcentration 99%Sconcentration 100%Sconcentration 95%SSEconcentration 94%Sconcentration 97%Sconcentration 84%
Mean directional spread (°)25.524.229.527.324.525.730.730.532.227.323.621.419.824.524.426.828.431.330.930.631.729.531.426.626.023.123.731.330.928.230.5
Mean water temperature(°C)18.418.418.618.718.919.119.219.519.819.920.120.120.220.420.720.820.820.820.720.720.820.820.820.921.020.920.820.921.021.121.1

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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