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M2 wave buoy daily means for Aug 2016

Daily means from the M2 wave buoy for Aug 2016, 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

735 wave-buoy observations covered all 31 days. Typical wave height was 2.1 ft (10th–90th percentile 1–4.6 ft), while mean peak wave period was 5.3 seconds (10th–90th percentile 3.3–7.4 seconds). Typical wind was 11 mph (10th–90th percentile 4.1–20.6 mph). 5 of 3,675 checked values (0.1%) were excluded by quality control. Across 5 comparable years, mean wave height was below the same-month mean of 2.7 ft and mean wave period was above the same-month mean of 5.2 seconds.

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

Typical Significant Wave Height

2.1ft
Mean: 2.5 ft
P10–P90: 1 — 4.6 ft
Recorded extremes

0.5 — 10.8 ft

Mean Observed Wave Period

5.3secs
P10–P90: 3.3 — 7.4secs
Recorded extremes

2 — 25secs

Available for 730 of 735 hourly samples

Typical Observed Wind

SW, 11mph
Mean: 11.8 mph
P10–P90: 4.1 — 20.6 mph
Recorded extremes

0.3 — 31.1 mph

Circular concentration: 40%

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 735 hourly samples

Compared With Previous Augusts

Historical baseline from 2,880 observations across 5 years.

Wave Height
2.5ft
0.2ft below mean
Historical mean 2.723ft
Wave Period
5.3s
0.1s above mean
Historical mean 5.2s
Water Temperature
–
Not enough comparable data
Historical mean 14.3°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 Aug 2016Last observation shown
Metric
Mean significant wave height (ft)2343234432433111214744211212233
Mean maximum wave height (ft)14752466435441012251055310222344
Mean peak period (s)3766655544445657545857666455755
Mean zero-crossing period (s)3544444444444443434545445344444
Mean peak wave directionSWconcentration 57%SSEconcentration 94%Sconcentration 97%SSWconcentration 78%SEconcentration 43%Sconcentration 82%SSWconcentration 87%Wconcentration 68%NWconcentration 98%NWconcentration 80%Wconcentration 98%SWconcentration 82%SSWconcentration 63%SSWconcentration 64%SSEconcentration 78%Variableconcentration 22%ESEconcentration 53%Variableconcentration 29%SSEconcentration 67%Sconcentration 96%SWconcentration 70%Sconcentration 98%SSEconcentration 92%Sconcentration 53%SSEconcentration 62%Sconcentration 87%SSEconcentration 54%ENEconcentration 33%Sconcentration 76%Sconcentration 98%SSWconcentration 78%
Mean wave directionSSWconcentration 80%SSEconcentration 97%Sconcentration 99%SSWconcentration 91%SEconcentration 68%Sconcentration 97%SSWconcentration 97%Wconcentration 84%NWconcentration 98%NWconcentration 78%Wconcentration 98%SWconcentration 88%SSWconcentration 90%Sconcentration 90%SSEconcentration 93%ESEconcentration 76%ESEconcentration 91%NEconcentration 68%SSEconcentration 89%Sconcentration 98%SSWconcentration 90%Sconcentration 99%SSEconcentration 98%SSWconcentration 59%SSEconcentration 92%Sconcentration 98%SEconcentration 67%ENEconcentration 68%SEconcentration 56%Sconcentration 98%SSWconcentration 95%
Mean directional spread (°)32.321.324.030.740.926.828.033.024.229.426.425.731.536.040.637.735.336.430.823.427.423.131.339.039.926.033.027.224.822.531.9
Mean wind directionSconcentration 39%SEconcentration 79%SWconcentration 90%WSWconcentration 87%Sconcentration 35%SSWconcentration 83%SWconcentration 90%Wconcentration 93%WNWconcentration 97%Wconcentration 92%Wconcentration 98%SSWconcentration 94%WSWconcentration 88%WSWconcentration 62%SEconcentration 95%ESEconcentration 93%Econcentration 51%NNEconcentration 33%SSEconcentration 95%SWconcentration 80%SWconcentration 78%Sconcentration 88%Sconcentration 57%NWconcentration 49%Variableconcentration 29%SSWconcentration 93%ESEconcentration 38%Nconcentration 91%SWconcentration 47%Sconcentration 95%WSWconcentration 80%
Mean wind speed (mph)1281912615191716111816116897717221611964119781612
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