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M2 wave buoy daily means for Oct 2013

Daily means from the M2 wave buoy for Oct 2013, 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

743 wave-buoy observations covered all 31 days. Typical wave height was 4.6 ft (10th–90th percentile 2.6–7.2 ft), while mean peak wave period was 6.2 seconds (10th–90th percentile 4.3–8.8 seconds). 4 of 2,229 checked values (0.2%) were excluded by quality control. Across 3 comparable years, mean wave height was above the same-month mean of 4.4 ft and mean wave period was above the same-month mean of 5.4 seconds.

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

Typical Significant Wave Height

4.6ft
Mean: 4.6 ft
P10–P90: 2.6 — 7.2 ft
Recorded extremes

1.5 — 11.8 ft

Mean Observed Wave Period

6.2secs
P10–P90: 4.3 — 8.8secs
Recorded extremes

2.9 — 12.2secs

Available for 739 of 743 hourly samples

Typical Observed Wind

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

Available for 0 of 743 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 743 hourly samples

Compared With Previous Octobers

Historical baseline from 2,188 observations across 3 years.

Wave Height
4.6ft
0.2ft above mean
Historical mean 4.364ft
Wave Period
6.2s
0.8s above mean
Historical mean 5.4s
Water Temperature
–
Not enough comparable data
Historical mean 14°C

Chart showing grouped wave observations for M2. 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 M2 wave buoy

M2 (WMO 62091) is part of the Irish Marine Data Buoy Observation Network, managed by the Marine Institute in collaboration with Met Éireann. Moored in the Irish Sea east of Ireland, it provides open-water context for the busy, relatively enclosed waters between the Irish and British coasts.

Its current data source reports wave height, wave period, wave direction, directional spread, wind conditions and sea temperature.

Metrics are rows; days run left to right.
M2 wave buoy daily means Oct 2013Last observation shown
Metric
Mean significant wave height (ft)5442244257654535345656535686665
Mean maximum wave height (ft)875335537108757374688898479128886
Mean peak period (s)6567755656665656856788686877566
Mean zero-crossing period (s)5444444445544544545555554555554
Mean peak wave directionEconcentration 88%SEconcentration 70%SSEconcentration 68%SSEconcentration 59%Sconcentration 63%Sconcentration 95%Sconcentration 91%SSWconcentration 72%NWconcentration 84%NNEconcentration 92%ENEconcentration 87%ENEconcentration 90%NEconcentration 94%NEconcentration 89%ENEconcentration 94%SSEconcentration 62%SSWconcentration 77%Sconcentration 86%Sconcentration 81%Sconcentration 77%Sconcentration 72%SSWconcentration 87%WSWconcentration 68%SSWconcentration 65%SEconcentration 64%SSEconcentration 79%Sconcentration 91%SSWconcentration 70%WNWconcentration 75%SSWconcentration 73%Sconcentration 79%
Mean wave directionEconcentration 96%SEconcentration 90%SSEconcentration 85%Sconcentration 68%SSWconcentration 67%SSWconcentration 97%SSWconcentration 95%SSWconcentration 92%NWconcentration 86%NNEconcentration 94%NEconcentration 90%ENEconcentration 92%NEconcentration 95%NEconcentration 93%ENEconcentration 96%SEconcentration 71%SSWconcentration 86%Sconcentration 94%Sconcentration 92%Sconcentration 95%Sconcentration 90%SSWconcentration 94%WSWconcentration 81%SSWconcentration 80%SEconcentration 81%Sconcentration 92%Sconcentration 96%SSWconcentration 89%Wconcentration 87%SSWconcentration 85%SSWconcentration 95%
Mean directional spread (°)51.754.451.353.457.545.546.151.035.742.941.437.935.436.533.251.155.643.050.048.254.653.440.750.952.959.249.446.737.142.146.9
Mean wind direction-------------------------------
Mean wind speed (mph)-------------------------------
Mean water temperature(°C)-------------------------------

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 Met Éireann Irish Marine Data Buoy Observation Network.

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

› Wave Buoy List