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M2 wave buoy daily means for Jul 2016

Daily means from the M2 wave buoy for Jul 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

718 wave-buoy observations covered all 31 days. Typical wave height was 2.1 ft (10th–90th percentile 1–4.1 ft), while mean peak wave period was 4.8 seconds (10th–90th percentile 3–6.6 seconds). Typical wind was 12 mph (10th–90th percentile 5.7–19.7 mph). 4 of 3,590 checked values (0.1%) were excluded by quality control. Across 5 comparable years, mean wave height was below the same-month mean of 2.6 ft and mean wave period was the same as the same-month mean of 4.8 seconds.

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

Typical Significant Wave Height

2.1ft
Mean: 2.4 ft
P10–P90: 1 — 4.1 ft
Recorded extremes

0.5 — 6.7 ft

Mean Observed Wave Period

4.8secs
P10–P90: 3 — 6.6secs
Recorded extremes

2.1 — 25secs

Available for 714 of 718 hourly samples

Typical Observed Wind

SW, 12mph
Mean: 12.4 mph
P10–P90: 5.7 — 19.7 mph
Recorded extremes

0.5 — 30.1 mph

Circular concentration: 60%

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 718 hourly samples

Compared With Previous Julys

Historical baseline from 3,524 observations across 5 years.

Wave Height
2.4ft
0.2ft below mean
Historical mean 2.592ft
Wave Period
4.8s
In line with the historical mean
Historical mean 4.8s
Water Temperature
–
Not enough comparable data
Historical mean 13.5°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 Jul 2016Last observation shown
Metric
Mean significant wave height (ft)3423323355422232221122212222221
Mean maximum wave height (ft)5534533468532343220133223233321
Mean peak period (s)4554455556654456444454675554447
Mean zero-crossing period (s)4444444445443344343344444444433
Mean peak wave directionSWconcentration 88%WSWconcentration 85%SSWconcentration 69%Sconcentration 98%NWconcentration 52%Sconcentration 53%SSEconcentration 92%Sconcentration 91%Sconcentration 98%Sconcentration 100%SSWconcentration 81%Wconcentration 42%WNWconcentration 73%WNWconcentration 55%Sconcentration 96%Sconcentration 96%SSWconcentration 57%SSEconcentration 92%SEconcentration 41%SWconcentration 52%Sconcentration 71%Sconcentration 85%SSEconcentration 86%Sconcentration 58%SWconcentration 77%SSWconcentration 66%Variableconcentration 10%Sconcentration 95%Nconcentration 53%Nconcentration 36%Variableconcentration 15%
Mean wave directionSWconcentration 98%SWconcentration 95%SSWconcentration 91%SSEconcentration 97%NNWconcentration 45%SSEconcentration 69%SSEconcentration 96%Sconcentration 96%Sconcentration 99%Sconcentration 100%SSWconcentration 93%Wconcentration 59%Wconcentration 85%WNWconcentration 57%Sconcentration 99%Sconcentration 99%SSWconcentration 72%SSEconcentration 97%SEconcentration 54%SWconcentration 69%Sconcentration 83%Sconcentration 88%SSEconcentration 96%Sconcentration 91%SSWconcentration 88%SSWconcentration 86%Variableconcentration 6%Sconcentration 98%Nconcentration 40%NNWconcentration 47%Variableconcentration 21%
Mean directional spread (°)33.331.231.527.532.132.528.233.222.319.124.729.626.827.718.927.531.125.436.633.128.128.934.942.431.729.731.426.429.638.345.2
Mean wind directionWSWconcentration 93%WSWconcentration 96%SWconcentration 81%SSWconcentration 70%Wconcentration 70%Sconcentration 66%SSWconcentration 76%SWconcentration 84%Sconcentration 99%Sconcentration 98%WSWconcentration 90%Wconcentration 75%WNWconcentration 91%Wconcentration 62%SSWconcentration 99%WSWconcentration 82%SWconcentration 70%Sconcentration 87%ESEconcentration 63%SWconcentration 70%SSWconcentration 94%SWconcentration 57%Sconcentration 96%SSWconcentration 77%SWconcentration 92%SSWconcentration 83%Wconcentration 57%SSWconcentration 89%NNWconcentration 81%WNWconcentration 61%Wconcentration 59%
Mean wind speed (mph)161512131413111222221411121317101110881213139121211111197
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