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M2 wave buoy daily means for Mar 2024

Daily means from the M2 wave buoy for Mar 2024, 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

727 wave-buoy observations covered all 31 days. Typical wave height was 4.6 ft (10th–90th percentile 2.7–7.7 ft), while mean peak wave period was 6.2 seconds (10th–90th percentile 4.2–8.3 seconds). Typical wind was 18.9 mph (10th–90th percentile 10.2–26.3 mph) and mean water temperature was 9.2°C (10th–90th percentile 9.1–9.3°C). 1 of 4,362 checked values (0%) were excluded by quality control. Across 13 comparable years, mean wave height was above the same-month mean of 3.8 ft and mean wave period was above the same-month mean of 5.7 seconds.

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

Typical Significant Wave Height

4.6ft
Mean: 5 ft
P10–P90: 2.7 — 7.7 ft
Recorded extremes

1.5 — 11.9 ft

Mean Observed Wave Period

6.2secs
P10–P90: 4.2 — 8.3secs
Recorded extremes

2.6 — 13.4secs

Available for 726 of 727 hourly samples

Typical Observed Wind

Variable, 18.9mph
Mean: 18.4 mph
P10–P90: 10.2 — 26.3 mph
Recorded extremes

1 — 31.2 mph

Circular concentration: 25%

Mean Water Temperature

9.2°C
P10–P90: 9.1 — 9.3°C
Recorded extremes

8.8 — 9.4°C

Compared With Previous Marchs

Historical baseline from 9,246 observations across 13 years.

Wave Height
5ft
1.2ft above mean
Historical mean 3.839ft
Wave Period
6.2s
0.5s above mean
Historical mean 5.7s
Water Temperature
9.2°C
0.8°C above mean
Historical mean 8.4°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 2024Last observation shown
Metric
Mean significant wave height (ft)7536645897357655455344645364444
Mean maximum wave height (ft)1184910581314115811108768847710695106766
Mean peak period (s)66469657765677676586555466661075
Mean zero-crossing period (s)5444544565455555445444545454544
Mean peak wave directionESEconcentration 63%Nconcentration 99%Wconcentration 55%Sconcentration 94%Sconcentration 99%Sconcentration 98%SEconcentration 77%ENEconcentration 99%ENEconcentration 97%ENEconcentration 96%NEconcentration 81%Sconcentration 98%Sconcentration 100%Sconcentration 99%Variableconcentration 25%SSEconcentration 91%Sconcentration 99%Sconcentration 99%Sconcentration 100%Variableconcentration 21%Sconcentration 81%Wconcentration 73%WNWconcentration 95%Wconcentration 72%Sconcentration 98%ENEconcentration 51%SSEconcentration 58%SEconcentration 77%Sconcentration 100%Sconcentration 99%ESEconcentration 79%
Mean wave directionESEconcentration 68%Nconcentration 98%WSWconcentration 61%SSEconcentration 96%Sconcentration 99%Sconcentration 99%SEconcentration 88%ENEconcentration 99%ENEconcentration 98%ENEconcentration 97%ENEconcentration 84%Sconcentration 99%Sconcentration 100%Sconcentration 100%SWconcentration 53%SSEconcentration 76%Sconcentration 99%Sconcentration 99%Sconcentration 100%Variableconcentration 22%Sconcentration 82%Wconcentration 86%Wconcentration 96%Wconcentration 54%SSEconcentration 99%Econcentration 78%SEconcentration 77%SEconcentration 91%Sconcentration 100%Sconcentration 100%ESEconcentration 86%
Mean directional spread (°)149.4164.2180.4169.4108.6167.9203.5106.198.8125.2200.8143.5113.8124.5179.7142.3150.0169.199.4159.8143.9206.7154.7226.3151.9183.4176.9214.9113.3138.2216.1
Mean wind directionENEconcentration 79%NNWconcentration 96%WSWconcentration 78%SEconcentration 80%SSWconcentration 93%SEconcentration 95%Econcentration 93%ENEconcentration 99%NEconcentration 99%ENEconcentration 98%ESEconcentration 67%SSWconcentration 88%SWconcentration 58%SSWconcentration 95%WNWconcentration 77%SSEconcentration 65%SSWconcentration 94%SSWconcentration 96%SSWconcentration 83%Nconcentration 40%SWconcentration 95%WNWconcentration 99%WNWconcentration 98%WSWconcentration 54%SEconcentration 94%ENEconcentration 90%SSEconcentration 91%Variableconcentration 10%Sconcentration 92%Sconcentration 81%ENEconcentration 95%
Mean wind speed (mph)21191421181619252724131817221816172013111921261820152113161617
Mean water temperature(°C)9.29.29.29.29.29.29.29.29.19.19.19.19.19.19.19.19.29.29.29.39.29.18.99.19.19.29.29.29.29.29.3

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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