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M2 wave buoy daily means for Mar 2019

Daily means from the M2 wave buoy for Mar 2019, 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

470 wave-buoy observations covered 22 of 31 days (71%). Mean peak wave period was 6.3 seconds (10th–90th percentile 4.5–9.1 seconds); wave-height data were unavailable. Typical wind was 22.1 mph (10th–90th percentile 8.5–31.5 mph). 9 of 1,880 checked values (0.5%) were excluded by 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 470 hourly samples

Mean Observed Wave Period

6.3secs
P10–P90: 4.5 — 9.1secs
Recorded extremes

3.5 — 13secs

Available for 461 of 470 hourly samples

Typical Observed Wind

WSW, 22.1mph
Mean: 21 mph
P10–P90: 8.5 — 31.5 mph
Recorded extremes

0.2 — 39.5 mph

Circular concentration: 72%

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 470 hourly samples

Compared With Previous Marchs

Historical baseline from 5,879 observations across 8 years.

Wave Height
–
Not enough comparable data
Historical mean 3.707ft
Wave Period
6.3s
0.8s above mean
Historical mean 5.5s
Water Temperature
–
Not enough comparable data
Historical mean 8.2°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 Mar 2019Last observation shown
Metric
Mean significant wave height (ft)-------------------------------
Mean maximum wave height (ft)-------------------------------
Mean peak period (s)8667786556576557644---776------
Mean zero-crossing period (s)-------------------------------
Mean peak wave directionSconcentration 91%Sconcentration 97%Sconcentration 47%SWconcentration 65%Sconcentration 98%Sconcentration 80%WNWconcentration 85%SSEconcentration 31%WSWconcentration 85%SWconcentration 70%SWconcentration 77%SSWconcentration 80%WNWconcentration 91%Wconcentration 81%Wconcentration 73%Sconcentration 80%WNWconcentration 89%NNWconcentration 79%Wconcentration 100%---SSEconcentration 57%Variableconcentration 27%SEconcentration 63%------
Mean wave direction-------------------------------
Mean directional spread (°)21.022.525.526.524.422.423.828.335.532.627.624.327.628.437.327.426.116.839.4---53.166.463.3------
Mean wind directionSSWconcentration 74%SWconcentration 88%WSWconcentration 31%WSWconcentration 95%SSWconcentration 80%SWconcentration 62%WNWconcentration 93%WSWconcentration 79%WSWconcentration 86%Wconcentration 63%SWconcentration 78%WSWconcentration 93%Wconcentration 96%Wconcentration 87%Wconcentration 95%SWconcentration 61%WNWconcentration 94%Wconcentration 99%Wconcentration 91%---SWconcentration 64%WSWconcentration 78%Wconcentration 56%------
Mean wind speed (mph)14222121212229212223272928231825241311---593------
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