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M2 wave buoy daily means for Nov 2014

Daily means from the M2 wave buoy for Nov 2014, 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

715 wave-buoy observations covered all 30 days. Typical wave height was 4.2 ft (10th–90th percentile 1.8–7.8 ft), while mean peak wave period was 5.8 seconds (10th–90th percentile 3.8–8.6 seconds). Typical wind was 17.9 mph (10th–90th percentile 7.9–27.3 mph) and mean water temperature was 14°C (10th–90th percentile 13.6–14.5°C). 1 of 4,288 checked values (0%) were excluded by quality control. Across 4 comparable years, mean wave height was below the same-month mean of 4.9 ft and mean wave period was the same as the same-month mean of 5.8 seconds.

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

Typical Significant Wave Height

4.2ft
Mean: 4.5 ft
P10–P90: 1.8 — 7.8 ft
Recorded extremes

1 — 13.1 ft

Mean Observed Wave Period

5.8secs
P10–P90: 3.8 — 8.6secs
Recorded extremes

2.2 — 11.6secs

Available for 714 of 715 hourly samples

Typical Observed Wind

S, 17.9mph
Mean: 17.7 mph
P10–P90: 7.9 — 27.3 mph
Recorded extremes

0.8 — 37.8 mph

Circular concentration: 30%

Available for 713 of 715 hourly samples

Mean Water Temperature

14°C
P10–P90: 13.6 — 14.5°C
Recorded extremes

13.4 — 14.6°C

Compared With Previous Novembers

Historical baseline from 2,795 observations across 4 years.

Wave Height
4.5ft
0.4ft below mean
Historical mean 4.856ft
Wave Period
5.8s
In line with the historical mean
Historical mean 5.8s
Water Temperature
14°C
0.9°C above mean
Historical mean 13.1°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 2014Last observation shown
Metric
Mean significant wave height (ft)765539653477885353535532122532
Mean maximum wave height (ft)11877513874691011117485758643223743
Mean peak period (s)766557767677777565576644655674
Mean zero-crossing period (s)555445554455555454444443444443
Mean peak wave directionSconcentration 99%Sconcentration 97%SSWconcentration 80%NNWconcentration 85%NEconcentration 78%Sconcentration 98%SSWconcentration 82%SSWconcentration 66%Sconcentration 93%Sconcentration 79%SSEconcentration 92%SSEconcentration 95%Sconcentration 98%SSEconcentration 91%SSEconcentration 96%ENEconcentration 72%NNEconcentration 95%ENEconcentration 97%ESEconcentration 88%SSEconcentration 84%SEconcentration 79%Sconcentration 73%WNWconcentration 97%SWconcentration 78%Sconcentration 94%Econcentration 60%SSEconcentration 81%Econcentration 82%SEconcentration 46%WNWconcentration 78%
Mean wave directionSconcentration 100%SSWconcentration 99%SSWconcentration 94%NWconcentration 78%NEconcentration 85%Sconcentration 98%SSWconcentration 92%SSWconcentration 80%Sconcentration 97%Sconcentration 86%SSEconcentration 96%SSEconcentration 93%SSEconcentration 99%SSEconcentration 95%SSEconcentration 99%Econcentration 81%NNEconcentration 93%Econcentration 99%ESEconcentration 93%SSEconcentration 97%SEconcentration 92%Sconcentration 81%WNWconcentration 98%SWconcentration 82%SSEconcentration 96%Econcentration 89%SEconcentration 96%Econcentration 91%ESEconcentration 63%WNWconcentration 77%
Mean directional spread (°)18.519.723.226.431.518.927.830.325.323.427.825.123.827.123.327.727.226.237.125.838.132.028.228.533.631.825.729.924.929.0
Mean wind directionSSWconcentration 96%SWconcentration 97%WSWconcentration 89%NNWconcentration 91%NNEconcentration 56%Sconcentration 98%Wconcentration 90%SWconcentration 64%WSWconcentration 77%SSWconcentration 64%SSEconcentration 93%Sconcentration 88%SSEconcentration 82%SSEconcentration 88%SEconcentration 82%NEconcentration 83%NNEconcentration 75%ESEconcentration 99%ESEconcentration 98%SEconcentration 93%SEconcentration 95%WSWconcentration 73%WNWconcentration 98%WSWconcentration 93%Variableconcentration 28%Econcentration 83%SSEconcentration 93%Econcentration 99%Variableconcentration 15%NWconcentration 69%
Mean wind speed (mph)252120211230211891922242726161621172011191716148712191113
Mean water temperature(°C)14.114.214.114.214.314.514.514.514.414.414.414.414.314.214.114.114.114.013.913.913.913.813.813.713.713.613.513.613.513.5

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