Skip to content
Surfhog home
Menu

M2 wave buoy daily means for Jan 2013

Daily means from the M2 wave buoy for Jan 2013, 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

708 wave-buoy observations covered 30 of 31 days (97%). Mean peak wave period was 5.5 seconds; wave-height data were unavailable. Typical wind was 18.8 mph (10th–90th percentile 7.7–29 mph) and mean water temperature was 9.4°C (10th–90th percentile 9–9.8°C). All 2,364 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 708 hourly samples

Mean Observed Wave Period

5.5secs
P10–P90: 5.5 — 5.5secs
Recorded extremes

5.5 — 5.5secs

Available for 120 of 708 hourly samples

Typical Observed Wind

S, 18.8mph
Mean: 18.6 mph
P10–P90: 7.7 — 29 mph
Recorded extremes

0.8 — 41.9 mph

Circular concentration: 47%

Mean Water Temperature

9.4°C
P10–P90: 9 — 9.8°C
Recorded extremes

8.5 — 10.2°C

Compared With Previous Januarys

Historical baseline from 1,473 observations across 2 years.

Wave Height
–
Not enough comparable data
Historical mean 4.757ft
Wave Period
5.5s
0.5s above mean
Historical mean 5s
Water Temperature
9.4°C
In line with the historical mean
Historical mean 9.4°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 2013Last observation shown
Metric
Mean significant wave height (ft)-------------------------------
Mean maximum wave height (ft)---999999----------------------
Mean peak period (s)---666666----------------------
Mean zero-crossing period (s)-------------------------------
Mean peak wave direction---SWconcentration 100%SWconcentration 100%SWconcentration 100%SWconcentration 100%SWconcentration 100%SWconcentration 100%----------------------
Mean wave direction---SWconcentration 100%SWconcentration 100%SWconcentration 100%SWconcentration 100%SWconcentration 100%SWconcentration 100%----------------------
Mean directional spread (°)---21.121.121.121.121.121.1----------------------
Mean wind direction-WSWconcentration 98%SWconcentration 87%SSWconcentration 94%Sconcentration 98%Sconcentration 98%Sconcentration 98%WSWconcentration 58%Variableconcentration 29%Sconcentration 56%SSWconcentration 68%Econcentration 96%Variableconcentration 18%WNWconcentration 93%Nconcentration 42%SSEconcentration 97%SSEconcentration 98%SEconcentration 98%ESEconcentration 98%ESEconcentration 99%ESEconcentration 75%ESEconcentration 71%ESEconcentration 93%SSEconcentration 82%Sconcentration 83%SWconcentration 69%WSWconcentration 94%SWconcentration 92%SWconcentration 87%WSWconcentration 92%WSWconcentration 91%
Mean wind speed (mph)-14111521192316511141911221618292716191211131528252628222528
Mean water temperature(°C)-9.99.99.79.59.49.59.69.69.79.79.89.79.79.69.59.69.69.49.39.29.19.19.19.19.09.09.09.08.98.9

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