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M2 wave buoy daily means for May 2007

Daily means from the M2 wave buoy for May 2007, 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

743 wave-buoy observations covered all 31 days. Typical wave height was 2.6 ft (10th–90th percentile 1.3–5.6 ft), while mean zero-crossing wave period was 4 seconds (10th–90th percentile 3–5 seconds). Typical wind was 15 mph (10th–90th percentile 8.1–24.2 mph) and mean water temperature was 10.8°C (10th–90th percentile 9.8–11.9°C). All 3,689 checked values passed quality control.

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

Typical Significant Wave Height

2.6ft
Mean: 3.1 ft
P10–P90: 1.3 — 5.6 ft
Recorded extremes

0.7 — 8.5 ft

Available for 736 of 743 hourly samples

Mean Observed Wave Period

4secs
P10–P90: 3 — 5secs
Recorded extremes

2 — 6secs

Available for 740 of 743 hourly samples

Typical Observed Wind

Variable, 15mph
Mean: 15.2 mph
P10–P90: 8.1 — 24.2 mph
Recorded extremes

3.5 — 33.4 mph

Circular concentration: 29%

Available for 730 of 743 hourly samples

Mean Water Temperature

10.8°C
P10–P90: 9.8 — 11.9°C
Recorded extremes

9.5 — 12.6°C

Available for 740 of 743 hourly samples

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 May 2007Last observation shown
Metric
Mean significant wave height (ft)531224343643442225QC rejected212222254333
Mean maximum wave height (ft)-------------------------------
Mean peak period (s)-------------------------------
Mean zero-crossing period (s)4444444445454444455444333344444
Mean peak wave direction-------------------------------
Mean wave direction-------------------------------
Mean directional spread (°)-------------------------------
Mean wind directionEconcentration 98%ENEconcentration 90%NNEconcentration 89%NEconcentration 87%SSEconcentration 67%SWconcentration 93%WSWconcentration 93%WSWconcentration 91%SSWconcentration 80%SWconcentration 88%SWconcentration 65%SWconcentration 69%Nconcentration 79%NWconcentration 42%Variableconcentration 25%WSWconcentration 91%WSWconcentration 81%SWconcentration 95%WSWconcentration 97%SSWconcentration 87%Sconcentration 32%SWconcentration 73%SWconcentration 84%SWconcentration 86%NWconcentration 43%WSWconcentration 67%NNEconcentration 93%Nconcentration 98%Wconcentration 57%SSEconcentration 70%SEconcentration 88%
Mean wind speed (mph)20188111417161716191812172071313232314914101310152218161513
Mean water temperature(°C)9.69.79.99.99.810.110.410.510.510.610.710.910.710.210.310.310.510.811.111.311.511.611.812.012.011.911.511.011.211.211.3

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