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M2 wave buoy daily means for Apr 2013

Daily means from the M2 wave buoy for Apr 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

718 wave-buoy observations covered all 30 days. Wave-height and wave-period data were unavailable. Typical wind was 16.9 mph (10th–90th percentile 7.4–24.8 mph) and mean water temperature was 7.3°C (10th–90th percentile 7.1–7.7°C). All 2,154 checked values passed quality control.

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

Typical Significant Wave Height

-ft
Mean: - ft
P10–P90: - — - ft

Available for 0 of 718 hourly samples

Mean Observed Wave Period

-secs
P10–P90: - — -secs

Available for 0 of 718 hourly samples

Typical Observed Wind

Variable, 16.9mph
Mean: 16.4 mph
P10–P90: 7.4 — 24.8 mph
Recorded extremes

1.1 — 39 mph

Circular concentration: 24%

Mean Water Temperature

7.3°C
P10–P90: 7.1 — 7.7°C
Recorded extremes

6.3 — 8.5°C

Compared With Previous Aprils

Historical baseline from 2,126 observations across 3 years.

Wave Height
–
Not enough comparable data
Historical mean 3.051ft
Wave Period
–
Not enough comparable data
Historical mean 5s
Water Temperature
7.3°C
1.6°C below mean
Historical mean 8.9°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 Apr 2013Last observation shown
Metric
Mean significant wave height (ft)------------------------------
Mean maximum wave height (ft)------------------------------
Mean peak period (s)------------------------------
Mean zero-crossing period (s)------------------------------
Mean peak wave direction------------------------------
Mean wave direction------------------------------
Mean directional spread (°)------------------------------
Mean wind directionESEconcentration 99%ESEconcentration 98%ENEconcentration 93%ENEconcentration 96%NEconcentration 98%Variableconcentration 25%SEconcentration 74%Econcentration 99%Econcentration 98%ESEconcentration 93%SEconcentration 90%Wconcentration 43%SEconcentration 83%Sconcentration 99%Sconcentration 98%SWconcentration 93%Sconcentration 95%WSWconcentration 94%Wconcentration 46%SSWconcentration 98%SSWconcentration 94%SWconcentration 92%SWconcentration 80%SSEconcentration 43%Variableconcentration 27%WNWconcentration 95%Nconcentration 49%WSWconcentration 87%WNWconcentration 91%WNWconcentration 43%
Mean wind speed (mph)19191719178122121131381728242027221317141512138191514179
Mean water temperature(°C)6.97.17.27.27.27.27.17.27.27.27.27.37.27.37.37.37.27.27.47.37.37.47.57.57.77.67.77.77.77.9

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