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M2 wave buoy daily means for Nov 2010

Daily means from the M2 wave buoy for Nov 2010, 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

709 wave-buoy observations covered all 30 days. Typical wave height was 4.1 ft (10th–90th percentile 2.1–10.3 ft), while mean peak wave period was 6 seconds (10th–90th percentile 4.1–9 seconds). Typical wind was 18 mph (10th–90th percentile 10.2–30 mph) and mean water temperature was 13°C (10th–90th percentile 12.4–13.4°C). 1 of 4,156 checked values (0%) were excluded by quality control.

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

Typical Significant Wave Height

4.1ft
Mean: 5.2 ft
P10–P90: 2.1 — 10.3 ft
Recorded extremes

1.5 — 16.4 ft

Available for 611 of 709 hourly samples

Mean Observed Wave Period

6secs
P10–P90: 4.1 — 9secs
Recorded extremes

2.9 — 11.4secs

Available for 708 of 709 hourly samples

Typical Observed Wind

Variable, 18mph
Mean: 19.3 mph
P10–P90: 10.2 — 30 mph
Recorded extremes

1.1 — 41.9 mph

Circular concentration: 12%

Mean Water Temperature

13°C
P10–P90: 12.4 — 13.4°C
Recorded extremes

12 — 13.7°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 2010Last observation shown
Metric
Mean significant wave height (ft)46464348941185335QC rejected7234333QC rejected5----
Mean maximum wave height (ft)6969646121451612744717103464441076666
Mean peak period (s)766754588576897587855544655555
Mean zero-crossing period (s)45554446646555446544444454----
Mean peak wave directionSconcentration 72%SSWconcentration 94%SWconcentration 81%Sconcentration 99%SWconcentration 81%NWconcentration 55%Variableconcentration 29%SSEconcentration 70%ENEconcentration 98%Variableconcentration 25%SWconcentration 89%WSWconcentration 92%SSWconcentration 90%SSWconcentration 93%SSWconcentration 80%SSWconcentration 85%SSEconcentration 96%SSEconcentration 95%Sconcentration 90%ENEconcentration 95%NEconcentration 95%NEconcentration 93%NNEconcentration 89%Nconcentration 95%NNEconcentration 98%Nconcentration 97%NNWconcentration 100%NNWconcentration 100%NNWconcentration 100%NNWconcentration 100%
Mean wave directionSconcentration 33%SSWconcentration 98%SSWconcentration 92%SSWconcentration 99%SWconcentration 94%NWconcentration 66%Variableconcentration 29%SSEconcentration 77%ENEconcentration 98%Nconcentration 37%SWconcentration 91%WSWconcentration 96%SSWconcentration 96%SSWconcentration 98%SSWconcentration 89%SSWconcentration 92%SSEconcentration 100%Sconcentration 97%Sconcentration 94%Econcentration 93%NEconcentration 97%NEconcentration 97%NNEconcentration 88%Nconcentration 97%NNEconcentration 99%Nconcentration 98%NNWconcentration 100%NNWconcentration 100%NNWconcentration 100%NNWconcentration 100%
Mean directional spread (°)23.721.532.121.527.233.928.230.425.529.223.827.728.123.822.420.827.536.028.527.427.229.227.932.523.425.829.529.529.529.5
Mean wind directionWconcentration 48%WSWconcentration 94%WSWconcentration 91%SWconcentration 92%Wconcentration 96%NWconcentration 90%Variableconcentration 14%Variableconcentration 27%ENEconcentration 94%WNWconcentration 43%WSWconcentration 86%Wconcentration 99%WSWconcentration 89%WNWconcentration 97%WSWconcentration 82%Sconcentration 79%SEconcentration 98%SSWconcentration 83%Sconcentration 68%ENEconcentration 95%NEconcentration 96%ENEconcentration 89%Nconcentration 82%Nconcentration 97%Nconcentration 93%Nconcentration 96%NNEconcentration 82%Variableconcentration 28%Econcentration 91%ENEconcentration 92%
Mean wind speed (mph)172317211915201927173628181313223120101718151415232120101426
Mean water temperature(°C)13.513.513.313.313.313.213.213.213.113.213.413.313.113.013.113.113.213.213.112.912.812.812.712.712.512.212.412.412.412.3

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