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M2 wave buoy daily means for Feb 2015

Daily means from the M2 wave buoy for Feb 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

666 wave-buoy observations covered all 28 days. Typical wave height was 3.6 ft (10th–90th percentile 1.5–7.8 ft), while mean peak wave period was 5.3 seconds (10th–90th percentile 3.8–7.4 seconds). Typical wind was 17.7 mph (10th–90th percentile 9.4–28.7 mph) and mean water temperature was 8.6°C (10th–90th percentile 8.2–8.9°C). 1 of 3,996 checked values (0%) were excluded by quality control. Across 5 comparable years, mean wave height was above the same-month mean of 3.4 ft and mean wave period was above the same-month mean of 4.8 seconds.

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

Typical Significant Wave Height

3.6ft
Mean: 4.1 ft
P10–P90: 1.5 — 7.8 ft
Recorded extremes

0.4 — 10.6 ft

Mean Observed Wave Period

5.3secs
P10–P90: 3.8 — 7.4secs
Recorded extremes

2.1 — 10secs

Available for 665 of 666 hourly samples

Typical Observed Wind

W, 17.7mph
Mean: 18.4 mph
P10–P90: 9.4 — 28.7 mph
Recorded extremes

1 — 42.9 mph

Circular concentration: 38%

Mean Water Temperature

8.6°C
P10–P90: 8.2 — 8.9°C
Recorded extremes

8 — 9.1°C

Compared With Previous Februarys

Historical baseline from 2,163 observations across 5 years.

Wave Height
4.1ft
0.7ft above mean
Historical mean 3.412ft
Wave Period
5.3s
0.5s above mean
Historical mean 4.8s
Water Temperature
8.6°C
0.3°C above mean
Historical mean 8.3°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 Feb 2015Last observation shown
Metric
Mean significant wave height (ft)QC rejected334323221237335475356873556
Mean maximum wave height (ft)115354243302410457510856912104779
Mean peak period (s)7545445445458765577456656557
Mean zero-crossing period (s)5444434434345444455445554445
Mean peak wave directionNconcentration 98%Nconcentration 94%NNEconcentration 92%NNEconcentration 96%Nconcentration 95%ENEconcentration 78%Nconcentration 93%Nconcentration 68%NWconcentration 94%Variableconcentration 25%Sconcentration 99%Sconcentration 88%Sconcentration 100%ESEconcentration 37%Sconcentration 98%Wconcentration 54%SWconcentration 70%Sconcentration 100%Sconcentration 95%WSWconcentration 94%WNWconcentration 96%SWconcentration 77%SWconcentration 94%Wconcentration 93%Sconcentration 89%WSWconcentration 65%SSWconcentration 85%Sconcentration 97%
Mean wave directionNconcentration 100%Nconcentration 98%NNEconcentration 97%NNEconcentration 98%Nconcentration 96%Econcentration 89%Nconcentration 97%NNWconcentration 83%NWconcentration 93%Econcentration 39%Sconcentration 99%Sconcentration 98%SSEconcentration 99%Econcentration 80%SSEconcentration 94%WSWconcentration 60%SWconcentration 74%Sconcentration 100%Sconcentration 98%WSWconcentration 98%WNWconcentration 97%SWconcentration 82%SWconcentration 99%Wconcentration 95%Sconcentration 97%WSWconcentration 76%SSWconcentration 90%Sconcentration 98%
Mean directional spread (°)21.227.430.426.128.736.420.129.530.035.425.329.818.525.922.022.924.818.224.628.627.725.323.928.432.524.122.420.3
Mean wind directionNWconcentration 98%NNWconcentration 94%Nconcentration 94%Nconcentration 96%NNWconcentration 83%ENEconcentration 93%Nconcentration 97%NWconcentration 76%NWconcentration 95%SSWconcentration 77%SWconcentration 93%SSWconcentration 90%SEconcentration 71%ENEconcentration 83%SSEconcentration 92%WNWconcentration 87%SWconcentration 85%SSWconcentration 100%SWconcentration 95%Wconcentration 97%WNWconcentration 97%SWconcentration 85%WSWconcentration 95%Wconcentration 97%SWconcentration 84%WSWconcentration 85%SWconcentration 89%SWconcentration 90%
Mean wind speed (mph)2316151717111712116121521141920192719182324312514232324
Mean water temperature(°C)8.98.88.88.98.98.88.78.78.68.68.68.58.68.68.78.78.78.78.78.68.58.58.48.28.28.28.18.0

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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