M5 wave buoy observations on Sat, Aug 15, 2026Hourly readings from the M5 wave buoy for Sat, Aug 15, 2026, including available wave height, period, direction, wind and sea temperature data.
Sat, Aug 15, 2026
Partial period 12 of 14 expected observations so far · 86% observation coverage Line chart showing wave height, wave period and sea temperature for M5. Use the detailed observations table below for the same data in text form.
Sorry, there is no wave data :(
About M5 wave buoy M5 is an offshore data buoy in the Atlantic approaches (51.4100°N, 6.4200°W). It is positioned to monitor swell and storm waves moving toward Ireland and the UK, supporting marine warnings. It typically reports waves (height/period/direction) and basic meteorology.
Swipe sideways to see more hours.
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 height 0–40+ ft
0 5 10 15 20 25 30 40+ Wave & swell period 0–22+ s
0 4 8 12 16 20 22+ Wind speed 0–75 mph
0 10 20 30 40 50 60 75 The displayed numbers remain the source of truth; colour is an additional visual cue.
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.
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 ≈ 0.49 × Hs 2 × Te 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 Met Éireann Irish Marine Data Buoy Observation Network . › Wave Buoy List
NOTE: Automated quality checks remove individual measurements outside valid ranges or with suspect spikes, rates of change or frozen sensor values before they are shown. Automated checks cannot identify every instrument or reporting fault, so use this real-time data at your own risk.