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M2 wave buoy daily means for Nov 2015

Daily means from the M2 wave buoy for Nov 2015, 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

718 wave-buoy observations covered all 30 days. Typical wave height was 5.1 ft (10th–90th percentile 1.7–9.1 ft), while mean peak wave period was 6.2 seconds (10th–90th percentile 4.2–8.8 seconds). Typical wind was 22 mph (10th–90th percentile 8.8–32 mph) and mean water temperature was 13°C (10th–90th percentile 12.3–13.7°C). 2 of 4,306 checked values (0%) were excluded by quality control. Across 5 comparable years, mean wave height was above the same-month mean of 4.8 ft and mean wave period was above the same-month mean of 5.8 seconds.

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

Typical Significant Wave Height

5.1ft
Mean: 5.4 ft
P10–P90: 1.7 — 9.1 ft
Recorded extremes

0.8 — 14 ft

Mean Observed Wave Period

6.2secs
P10–P90: 4.2 — 8.8secs
Recorded extremes

2.1 — 10.8secs

Available for 716 of 718 hourly samples

Typical Observed Wind

WSW, 22mph
Mean: 21.1 mph
P10–P90: 8.8 — 32 mph
Recorded extremes

1 — 42.7 mph

Circular concentration: 59%

Available for 716 of 718 hourly samples

Mean Water Temperature

13°C
P10–P90: 12.3 — 13.7°C
Recorded extremes

12 — 13.8°C

Compared With Previous Novembers

Historical baseline from 3,510 observations across 5 years.

Wave Height
5.4ft
0.6ft above mean
Historical mean 4.757ft
Wave Period
6.2s
0.4s above mean
Historical mean 5.8s
Water Temperature
13°C
0.3°C below mean
Historical mean 13.3°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 2015Last observation shown
Metric
Mean significant wave height (ft)222135489768859768667435535796
Mean maximum wave height (ft)32224861213111011128129812881164774611138
Mean peak period (s)985557988777668666556545545667
Mean zero-crossing period (s)644345566555556555545444444555
Mean peak wave directionSconcentration 97%Sconcentration 95%ESEconcentration 66%ENEconcentration 62%Sconcentration 97%Sconcentration 100%Sconcentration 100%Sconcentration 100%Sconcentration 99%Sconcentration 100%Sconcentration 100%Sconcentration 98%SSWconcentration 91%SSWconcentration 87%Sconcentration 100%SSWconcentration 85%Sconcentration 83%SSWconcentration 83%WSWconcentration 94%Wconcentration 89%NNWconcentration 85%Nconcentration 74%SSWconcentration 32%WNWconcentration 89%NWconcentration 98%WNWconcentration 69%SWconcentration 60%SWconcentration 87%WSWconcentration 89%Sconcentration 85%
Mean wave directionSSEconcentration 98%Sconcentration 95%SEconcentration 92%ENEconcentration 87%SSEconcentration 97%Sconcentration 100%Sconcentration 98%Sconcentration 98%Sconcentration 100%Sconcentration 100%Sconcentration 100%Sconcentration 99%SWconcentration 97%SSWconcentration 93%Sconcentration 100%SSWconcentration 96%SSWconcentration 91%SSWconcentration 93%WSWconcentration 95%Wconcentration 90%NNWconcentration 90%NNWconcentration 75%SSWconcentration 35%Wconcentration 96%NWconcentration 99%WNWconcentration 75%SWconcentration 72%SWconcentration 91%WSWconcentration 92%Sconcentration 91%
Mean directional spread (°)20.923.637.025.522.417.518.317.118.018.819.919.024.822.017.925.124.824.929.524.724.026.329.426.926.434.627.123.426.324.8
Mean wind directionSSEconcentration 68%SSEconcentration 86%Variableconcentration 21%NNEconcentration 57%Sconcentration 71%SSWconcentration 88%SSWconcentration 81%SSWconcentration 82%SWconcentration 97%SSWconcentration 99%SWconcentration 94%SWconcentration 93%WSWconcentration 98%SWconcentration 89%SSWconcentration 98%WSWconcentration 98%WSWconcentration 77%WSWconcentration 90%Wconcentration 98%WNWconcentration 95%NWconcentration 88%Nconcentration 83%WSWconcentration 79%WNWconcentration 98%WNWconcentration 98%Wconcentration 90%WSWconcentration 79%WSWconcentration 94%WSWconcentration 98%Wconcentration 35%
Mean wind speed (mph)710791417162630252027302227242328232626171623231523303116
Mean water temperature(°C)13.813.713.713.713.713.713.713.713.713.413.313.213.113.013.013.012.812.812.812.712.512.412.512.612.412.312.312.212.212.1

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