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M2 wave buoy daily means for Nov 2013

Daily means from the M2 wave buoy for Nov 2013, 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

712 wave-buoy observations covered all 30 days. Typical wave height was 3.1 ft (10th–90th percentile 1.5–6.7 ft), while mean peak wave period was 4.8 seconds (10th–90th percentile 3.3–6.8 seconds). 4 of 2,136 checked values (0.2%) were excluded by quality control. Across 3 comparable years, mean wave height was below the same-month mean of 5.2 ft and mean wave period was below the same-month mean of 6.2 seconds.

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

Typical Significant Wave Height

3.1ft
Mean: 3.8 ft
P10–P90: 1.5 — 6.7 ft
Recorded extremes

0.5 — 13.3 ft

Mean Observed Wave Period

4.8secs
P10–P90: 3.3 — 6.8secs
Recorded extremes

2.5 — 10.4secs

Available for 708 of 712 hourly samples

Typical Observed Wind

-, -mph
Mean: - mph
P10–P90: - — - mph

Available for 0 of 712 hourly samples

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 712 hourly samples

Compared With Previous Novembers

Historical baseline from 2,083 observations across 3 years.

Wave Height
3.8ft
1.4ft below mean
Historical mean 5.217ft
Wave Period
4.8s
1.4s below mean
Historical mean 6.2s
Water Temperature
–
Not enough comparable data
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 2013Last observation shown
Metric
Mean significant wave height (ft)3853535434535632336973222222QC rejectedQC rejected
Mean maximum wave height (ft)411846575556579323581311432223276
Mean peak period (s)676556544564564445577544344455
Mean zero-crossing period (s)455444444444454334455433333344
Mean peak wave directionSconcentration 75%SSWconcentration 64%WSWconcentration 76%NNWconcentration 33%WSWconcentration 71%WSWconcentration 60%SWconcentration 84%SWconcentration 79%WSWconcentration 89%Variableconcentration 24%SSWconcentration 69%Wconcentration 92%SWconcentration 77%NNWconcentration 75%WNWconcentration 79%WSWconcentration 92%SSWconcentration 47%NWconcentration 65%NNWconcentration 79%NWconcentration 53%NNEconcentration 92%NEconcentration 84%NNWconcentration 86%NEconcentration 72%Nconcentration 44%WNWconcentration 86%WNWconcentration 93%NWconcentration 67%WNWconcentration 78%Nconcentration 84%
Mean wave directionSSWconcentration 88%SSWconcentration 72%WSWconcentration 87%NWconcentration 38%WSWconcentration 84%SWconcentration 83%SWconcentration 90%SWconcentration 92%WSWconcentration 92%NWconcentration 33%SSWconcentration 85%Wconcentration 90%SWconcentration 84%NNWconcentration 75%WNWconcentration 79%WSWconcentration 93%SSWconcentration 44%NWconcentration 70%NWconcentration 89%NWconcentration 55%NNEconcentration 94%NEconcentration 95%Nconcentration 93%ENEconcentration 89%Nconcentration 46%WNWconcentration 93%WNWconcentration 92%NWconcentration 86%WNWconcentration 81%Nconcentration 91%
Mean directional spread (°)49.350.444.647.541.641.533.537.132.642.939.227.129.836.629.129.936.641.338.033.243.534.245.945.534.128.632.939.731.536.0
Mean wind direction------------------------------
Mean wind speed (mph)------------------------------
Mean water temperature(°C)------------------------------

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