Skip to content
Surfhog home
Menu

M2 wave buoy daily means for Dec 2013

Daily means from the M2 wave buoy for Dec 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

741 wave-buoy observations covered all 31 days. Typical wave height was 6.7 ft (10th–90th percentile 2.6–11.3 ft), while mean peak wave period was 6.8 seconds (10th–90th percentile 4.1–10 seconds). 5 of 2,223 checked values (0.2%) were excluded by quality control. Across 3 comparable years, mean wave height was above the same-month mean of 5.4 ft and mean wave period was above the same-month mean of 5.8 seconds.

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

Typical Significant Wave Height

6.7ft
Mean: 6.8 ft
P10–P90: 2.6 — 11.3 ft
Recorded extremes

1 — 19 ft

Mean Observed Wave Period

6.8secs
P10–P90: 4.1 — 10secs
Recorded extremes

2.6 — 12.8secs

Available for 736 of 741 hourly samples

Typical Observed Wind

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

Available for 0 of 741 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 741 hourly samples

Compared With Previous Decembers

Historical baseline from 1,720 observations across 3 years.

Wave Height
6.8ft
1.4ft above mean
Historical mean 5.381ft
Wave Period
6.8s
1s above mean
Historical mean 5.8s
Water Temperature
–
Not enough comparable data
Historical mean 11.3°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 Dec 2013Last observation shown
Metric
Mean significant wave height (ft)222484355779711865118997911551456109
Mean maximum wave height (ft)223512557710101311151187161113121114177720891413
Mean peak period (s)44446545677788778977868911785698
Mean zero-crossing period (s)3334544455566655565665666575566
Mean peak wave directionNNWconcentration 61%SEconcentration 78%SSWconcentration 87%NWconcentration 82%WNWconcentration 61%WNWconcentration 79%SWconcentration 79%Sconcentration 95%Sconcentration 95%Sconcentration 94%SSWconcentration 93%Sconcentration 82%Sconcentration 89%Sconcentration 80%SSWconcentration 88%Sconcentration 85%SSWconcentration 92%Sconcentration 92%SSWconcentration 87%SSWconcentration 85%Sconcentration 90%SSWconcentration 89%Sconcentration 89%SSEconcentration 93%SSWconcentration 74%SWconcentration 52%Sconcentration 90%WSWconcentration 76%SWconcentration 80%SSWconcentration 74%Sconcentration 89%
Mean wave directionNNWconcentration 75%SSEconcentration 72%SSWconcentration 96%NWconcentration 79%WNWconcentration 60%WNWconcentration 86%SWconcentration 87%SSWconcentration 98%SSWconcentration 97%Sconcentration 97%Sconcentration 95%Sconcentration 94%Sconcentration 97%Sconcentration 91%SSWconcentration 95%SSWconcentration 96%SSWconcentration 96%Sconcentration 95%SSWconcentration 97%SSWconcentration 92%Sconcentration 97%SSWconcentration 97%Sconcentration 96%Sconcentration 98%SSWconcentration 85%SSWconcentration 88%Sconcentration 97%SWconcentration 83%SWconcentration 83%SSWconcentration 84%Sconcentration 96%
Mean directional spread (°)42.446.043.237.138.843.433.836.040.038.734.939.843.541.141.145.147.748.045.939.445.140.741.844.258.346.837.435.328.148.340.1
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