Skip to content
Surfhog home
Menu

M2 wave buoy daily means for Apr 2026

Daily means from the M2 wave buoy for Apr 2026, 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

720 wave-buoy observations covered all 30 days. Typical wave height was 3.5 ft (10th–90th percentile 1.5–6.9 ft), while mean peak wave period was 6.1 seconds (10th–90th percentile 3.3–9.1 seconds). Typical wind was 17.2 mph (10th–90th percentile 5.4–28 mph) and mean water temperature was 9.3°C (10th–90th percentile 8.9–9.8°C). 10 of 4,320 checked values (0.2%) were excluded by quality control. Across 14 comparable years, mean wave height was above the same-month mean of 3.1 ft and mean wave period was above the same-month mean of 5.3 seconds.

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

Typical Significant Wave Height

3.5ft
Mean: 4 ft
P10–P90: 1.5 — 6.9 ft
Recorded extremes

0.4 — 14.6 ft

Mean Observed Wave Period

6.1secs
P10–P90: 3.3 — 9.1secs
Recorded extremes

2.5 — 20secs

Available for 710 of 720 hourly samples

Typical Observed Wind

Variable, 17.2mph
Mean: 17 mph
P10–P90: 5.4 — 28 mph
Recorded extremes

1.4 — 43.2 mph

Circular concentration: 26%

Mean Water Temperature

9.3°C
P10–P90: 8.9 — 9.8°C
Recorded extremes

8.9 — 10.8°C

Compared With Previous Aprils

Historical baseline from 9,946 observations across 14 years.

Wave Height
4ft
0.9ft above mean
Historical mean 3.084ft
Wave Period
6.1s
0.8s above mean
Historical mean 5.3s
Water Temperature
9.3°C
0.4°C above 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 2026Last observation shown
Metric
Mean significant wave height (ft)2456643235106357563214642221255
Mean maximum wave height (ft)368101065358151048119953271074332478
Mean peak period (s)4566668955865577655456691086456
Mean zero-crossing period (s)345554454465445554434544654444
Mean peak wave directionWSWconcentration 64%NEconcentration 32%SSWconcentration 73%SSWconcentration 72%Wconcentration 82%Sconcentration 90%SSEconcentration 83%Sconcentration 96%WSWconcentration 51%SWconcentration 43%SSWconcentration 98%SWconcentration 89%Sconcentration 96%SSEconcentration 95%Sconcentration 99%Sconcentration 99%Sconcentration 99%WSWconcentration 54%Variableconcentration 22%Variableconcentration 30%NEconcentration 95%NEconcentration 96%NEconcentration 90%SSEconcentration 81%Sconcentration 97%SEconcentration 60%SEconcentration 48%NEconcentration 90%NEconcentration 95%NEconcentration 93%
Mean wave directionSWconcentration 70%Variableconcentration 28%SWconcentration 85%SSWconcentration 82%WSWconcentration 97%SSEconcentration 92%SEconcentration 91%SSEconcentration 98%WSWconcentration 60%SWconcentration 54%SSWconcentration 97%SWconcentration 97%Sconcentration 96%SSEconcentration 96%Sconcentration 99%Sconcentration 98%Sconcentration 99%SWconcentration 86%SEconcentration 37%ENEconcentration 42%NEconcentration 97%NEconcentration 97%NEconcentration 97%ESEconcentration 91%SSEconcentration 95%SEconcentration 81%SEconcentration 66%NEconcentration 91%NEconcentration 96%NEconcentration 97%
Mean directional spread (°)197.5188.7152.9175.5222.5196.5193.4122.9182.6154.0120.8139.3162.1165.6132.1138.3137.8176.3197.9201.8163.4118.0144.1103.563.6134.8153.6193.4146.8140.6
Mean wind directionWSWconcentration 67%WSWconcentration 34%SWconcentration 79%SSWconcentration 82%WSWconcentration 93%SSEconcentration 94%SEconcentration 52%SWconcentration 62%WSWconcentration 79%SSWconcentration 71%SSWconcentration 97%SWconcentration 93%Sconcentration 94%SSEconcentration 97%Sconcentration 99%SSWconcentration 97%Sconcentration 99%Wconcentration 87%Nconcentration 79%NEconcentration 95%Econcentration 95%Econcentration 99%Econcentration 98%ENEconcentration 95%SSEconcentration 66%Sconcentration 58%Nconcentration 92%NEconcentration 93%ENEconcentration 98%Econcentration 94%
Mean wind speed (mph)13181927231995172430201323272124136102124179577142320
Mean water temperature(°C)8.98.98.98.99.09.09.29.29.19.09.08.99.09.09.09.19.29.29.39.49.39.49.49.610.010.210.29.79.69.7

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