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M2 wave buoy daily means for Apr 2022

Daily means from the M2 wave buoy for Apr 2022, 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

719 wave-buoy observations covered all 30 days. Typical wave height was 2.8 ft (10th–90th percentile 1.3–4.6 ft), while mean peak wave period was 4.9 seconds (10th–90th percentile 3–7 seconds). Typical wind was 14.3 mph (10th–90th percentile 7.6–20.6 mph) and mean water temperature was 9.3°C (10th–90th percentile 9.1–9.6°C). 5 of 4,314 checked values (0.1%) were excluded by quality control. Across 10 comparable years, mean wave height was the same as the same-month mean of 3 ft and mean wave period was below the same-month mean of 5.2 seconds.

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

Typical Significant Wave Height

2.8ft
Mean: 3 ft
P10–P90: 1.3 — 4.6 ft
Recorded extremes

0.5 — 11.8 ft

Mean Observed Wave Period

4.9secs
P10–P90: 3 — 7secs
Recorded extremes

2.5 — 15.7secs

Available for 714 of 719 hourly samples

Typical Observed Wind

Variable, 14.3mph
Mean: 14.4 mph
P10–P90: 7.6 — 20.6 mph
Recorded extremes

1.2 — 34.8 mph

Circular concentration: 8%

Mean Water Temperature

9.3°C
P10–P90: 9.1 — 9.6°C
Recorded extremes

8.9 — 10.1°C

Compared With Previous Aprils

Historical baseline from 7,132 observations across 10 years.

Wave Height
3ft
0ft above mean
Historical mean 2.953ft
Wave Period
4.9s
0.3s below mean
Historical mean 5.2s
Water Temperature
9.3°C
0.7°C above mean
Historical mean 8.6°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 2022Last observation shown
Metric
Mean significant wave height (ft)332445QC rejected43353233322213454323211
Mean maximum wave height (ft)5425571255464334333214677423211
Mean peak period (s)543555656575844445565566544445
Mean zero-crossing period (s)433444544454544444444444434333
Mean peak wave directionNNEconcentration 80%Nconcentration 74%Variableconcentration 20%WNWconcentration 82%Wconcentration 80%SSWconcentration 90%WNWconcentration 68%Nconcentration 95%Variableconcentration 22%Sconcentration 95%SEconcentration 70%Econcentration 47%Sconcentration 97%Sconcentration 98%Sconcentration 94%Sconcentration 95%Sconcentration 97%SSWconcentration 87%SWconcentration 55%SSEconcentration 72%ENEconcentration 77%NEconcentration 91%NEconcentration 95%ENEconcentration 93%ENEconcentration 88%ENEconcentration 94%ENEconcentration 89%Econcentration 72%ENEconcentration 54%SSEconcentration 61%
Mean wave directionNNEconcentration 86%Nconcentration 77%Variableconcentration 12%Wconcentration 95%Wconcentration 90%SSWconcentration 98%WNWconcentration 76%Nconcentration 97%NWconcentration 52%Sconcentration 96%SEconcentration 89%ESEconcentration 67%Sconcentration 91%Sconcentration 99%Sconcentration 99%Sconcentration 99%Sconcentration 99%SSWconcentration 92%SSWconcentration 80%SEconcentration 86%ENEconcentration 94%NEconcentration 93%NEconcentration 96%NEconcentration 98%ENEconcentration 98%ENEconcentration 96%ENEconcentration 95%Econcentration 91%Econcentration 75%Sconcentration 79%
Mean directional spread (°)60.756.250.065.063.654.039.959.141.940.243.154.626.945.851.450.851.748.240.746.352.654.242.449.248.246.749.353.049.851.3
Mean wind directionNNWconcentration 90%Nconcentration 74%Wconcentration 54%WNWconcentration 98%WSWconcentration 94%WSWconcentration 98%WNWconcentration 96%NNWconcentration 95%Wconcentration 68%SSEconcentration 88%ESEconcentration 89%Variableconcentration 24%SWconcentration 90%Sconcentration 97%SSEconcentration 98%Sconcentration 100%Sconcentration 93%SWconcentration 91%NNWconcentration 48%NEconcentration 91%ENEconcentration 92%NEconcentration 94%NEconcentration 97%NEconcentration 99%ENEconcentration 95%ENEconcentration 94%ENEconcentration 97%Econcentration 70%ENEconcentration 87%Sconcentration 85%
Mean wind speed (mph)1514122019232616141515119141415131387161919181411149810
Mean water temperature(°C)9.19.09.19.19.19.19.19.19.29.19.19.29.39.39.39.39.39.49.59.59.49.49.59.59.69.69.69.59.79.7

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