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M2 wave buoy daily means for Nov 2009

Daily means from the M2 wave buoy for Nov 2009, 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

526 wave-buoy observations covered 23 of 30 days (77%). Typical wave height was 6.2 ft (10th–90th percentile 2.8–11.3 ft), while mean peak wave period was 6.8 seconds (10th–90th percentile 4.6–10.4 seconds). Typical wind was 24.1 mph (10th–90th percentile 13.1–32.5 mph) and mean water temperature was 13.5°C (10th–90th percentile 13.3–13.7°C). 2 of 3,156 checked values (0.1%) were excluded by quality control.

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

Typical Significant Wave Height

6.2ft
Mean: 6.6 ft
P10–P90: 2.8 — 11.3 ft
Recorded extremes

1 — 17.7 ft

Mean Observed Wave Period

6.8secs
P10–P90: 4.6 — 10.4secs
Recorded extremes

2.3 — 15.1secs

Available for 524 of 526 hourly samples

Typical Observed Wind

SW, 24.1mph
Mean: 23.1 mph
P10–P90: 13.1 — 32.5 mph
Recorded extremes

2.6 — 40.4 mph

Circular concentration: 53%

Mean Water Temperature

13.5°C
P10–P90: 13.3 — 13.7°C
Recorded extremes

13.1 — 14°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 Nov 2009Last observation shown
Metric
Mean significant wave height (ft)665674542437410676101479118-------
Mean maximum wave height (ft)897910676364116148119142111131611-------
Mean peak period (s)55556555654771196691010886-------
Mean zero-crossing period (s)55455444444557555676665-------
Mean peak wave directionSWconcentration 55%Wconcentration 93%WSWconcentration 99%Wconcentration 91%NWconcentration 92%Wconcentration 48%SWconcentration 75%NNEconcentration 91%SSEconcentration 78%Variableconcentration 20%Econcentration 59%Sconcentration 95%Sconcentration 79%Sconcentration 88%Sconcentration 100%SSWconcentration 93%SSWconcentration 93%Sconcentration 100%Sconcentration 100%Sconcentration 99%Sconcentration 100%SSWconcentration 96%WSWconcentration 84%-------
Mean wave directionSSWconcentration 65%WSWconcentration 93%WSWconcentration 100%WSWconcentration 89%NWconcentration 94%WSWconcentration 58%SWconcentration 84%NNEconcentration 91%SSEconcentration 89%NWconcentration 36%ESEconcentration 72%Sconcentration 96%Sconcentration 83%SSWconcentration 88%Sconcentration 100%SSWconcentration 94%SSWconcentration 99%Sconcentration 100%Sconcentration 100%SSWconcentration 99%Sconcentration 99%SSWconcentration 98%SWconcentration 96%-------
Mean directional spread (°)29.830.628.726.625.833.124.925.334.026.233.123.222.421.921.624.421.917.017.120.119.518.227.2-------
Mean wind directionSWconcentration 43%Wconcentration 97%Wconcentration 99%Wconcentration 94%WNWconcentration 94%WSWconcentration 86%Wconcentration 72%NNEconcentration 90%SSEconcentration 69%NNWconcentration 59%ESEconcentration 83%SSWconcentration 88%Sconcentration 54%WSWconcentration 74%SSWconcentration 97%SSWconcentration 66%WSWconcentration 97%SWconcentration 67%SSWconcentration 100%SWconcentration 94%Sconcentration 93%SWconcentration 95%Wconcentration 97%-------
Mean wind speed (mph)2324242626202117131616241924212824243421283226-------
Mean water temperature(°C)13.913.813.713.713.613.713.713.613.513.513.613.613.613.613.513.513.413.413.413.413.313.213.2-------

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