Skip to content
Surfhog home
Menu

Rhyl Flats wave buoy daily means for May 2025

Daily means from the Rhyl Flats wave buoy for May 2025, including available wave height, period, direction, wind and sea temperature data.

Last observation shown none

Data available:  to 

Latest

Period Summary

Programmatically generated summary. Hog Says

No wave-buoy observations were recorded for this period, so no wave statistics are available.

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

Typical Significant Wave Height

-ft
Mean: - ft
P10–P90: - — - ft

Mean Observed Wave Period

-secs
P10–P90: - — -secs

Typical Observed Wind

-, -mph
Mean: - mph
P10–P90: - — - mph

Mean Water Temperature

-°C
P10–P90: - — -°C

Chart showing grouped wave observations for Rhyl Flats. 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 Rhyl Flats wave buoy

Rhyl Flats (CCO station 100) is an inshore coastal wave monitoring site at 53.3817°N, 3.6009°W. It’s part of the UK’s regional Coastal Monitoring / Channel Coastal Observatory network, placed to characterise nearshore wave climate for flood risk, erosion studies, coastal engineering and local forecasting. These stations commonly use a directional wave buoy (often a Datawell Directional WaveRider class) and report significant wave height, wave period (peak/mean) and wave direction; many also report sea temperature and, where fitted, nearby meteorology.

Metrics are rows; days run left to right.

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.

Learn how SurfHog combines, checks and summarizes observations in the data and methodology notes.

› Wave Buoy List