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M2 wave buoy daily means for Jan 2019

Daily means from the M2 wave buoy for Jan 2019, 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

743 wave-buoy observations covered all 31 days. Mean peak wave period was 4.8 seconds (10th–90th percentile 3.5–6.4 seconds); wave-height data were unavailable. Typical wind was 17.3 mph (10th–90th percentile 9–25.3 mph). All 2,972 checked values passed quality control.

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

Typical Significant Wave Height

-ft
Mean: - ft
P10–P90: - — - ft

Available for 0 of 743 hourly samples

Mean Observed Wave Period

4.8secs
P10–P90: 3.5 — 6.4secs
Recorded extremes

2.6 — 8.9secs

Typical Observed Wind

W, 17.3mph
Mean: 17.3 mph
P10–P90: 9 — 25.3 mph
Recorded extremes

2 — 41.9 mph

Circular concentration: 52%

Mean Water Temperature

-°C
P10–P90: - — -°C

Available for 0 of 743 hourly samples

Compared With Previous Januarys

Historical baseline from 5,137 observations across 8 years.

Wave Height
–
Not enough comparable data
Historical mean 5.217ft
Wave Period
4.8s
1s below mean
Historical mean 5.8s
Water Temperature
–
Not enough comparable data
Historical mean 9.8°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 Jan 2019Last observation shown
Metric
Mean significant wave height (ft)-------------------------------
Mean maximum wave height (ft)-------------------------------
Mean peak period (s)4444554545455555665455444674446
Mean zero-crossing period (s)-------------------------------
Mean peak wave directionWNWconcentration 68%ENEconcentration 77%Sconcentration 95%Sconcentration 95%Sconcentration 88%SSEconcentration 94%SWconcentration 60%NWconcentration 93%NNEconcentration 88%Variableconcentration 7%Nconcentration 56%Wconcentration 95%Wconcentration 89%WNWconcentration 95%Sconcentration 96%SWconcentration 68%Nconcentration 89%SSEconcentration 92%SEconcentration 70%NNEconcentration 76%Variableconcentration 22%Wconcentration 85%NWconcentration 92%WNWconcentration 85%Wconcentration 97%SSWconcentration 74%NNWconcentration 87%NWconcentration 90%WSWconcentration 80%WNWconcentration 93%SEconcentration 58%
Mean wave direction-------------------------------
Mean directional spread (°)26.028.128.527.126.529.625.226.437.333.933.225.226.323.424.024.827.822.334.830.530.330.230.835.025.425.322.827.124.931.329.9
Mean wind directionNNWconcentration 63%SEconcentration 87%SSWconcentration 94%SSWconcentration 97%SWconcentration 90%SWconcentration 88%WSWconcentration 85%NWconcentration 95%Nconcentration 93%NWconcentration 87%WNWconcentration 88%Wconcentration 97%WNWconcentration 94%Wconcentration 92%SWconcentration 95%Wconcentration 83%NNWconcentration 62%SSEconcentration 98%ESEconcentration 46%Nconcentration 85%WSWconcentration 65%WNWconcentration 97%WNWconcentration 94%Wconcentration 89%Wconcentration 99%WSWconcentration 82%NWconcentration 98%WNWconcentration 90%Wconcentration 91%WNWconcentration 98%SEconcentration 87%
Mean wind speed (mph)1514141012919181011142226192120182511141823171219223118211519
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