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M2 wave buoy daily means for Jan 2010

Daily means from the M2 wave buoy for Jan 2010, 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

741 wave-buoy observations covered all 31 days. Typical wave height was 3.9 ft (10th–90th percentile 2–8.2 ft), while mean zero-crossing wave period was 4.6 seconds (10th–90th percentile 4–6 seconds). Typical wind was 19.6 mph (10th–90th percentile 10.4–29.9 mph) and mean water temperature was 9.1°C (10th–90th percentile 8.5–10°C). 3 of 3,640 checked values (0.1%) were excluded by quality control.

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

Typical Significant Wave Height

3.9ft
Mean: 4.7 ft
P10–P90: 2 — 8.2 ft
Recorded extremes

1 — 14.8 ft

Available for 731 of 741 hourly samples

Mean Observed Wave Period

4.6secs
P10–P90: 4 — 6secs
Recorded extremes

3 — 8secs

Available for 731 of 741 hourly samples

Typical Observed Wind

Variable, 19.6mph
Mean: 19.8 mph
P10–P90: 10.4 — 29.9 mph
Recorded extremes

0 — 43.7 mph

Circular concentration: 1%

Available for 738 of 741 hourly samples

Mean Water Temperature

9.1°C
P10–P90: 8.5 — 10°C
Recorded extremes

7.1 — 10.4°C

Available for 696 of 741 hourly samples

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 2010Last observation shown
Metric
Mean significant wave height (ft)4553683247587389534674233134654
Mean maximum wave height (ft)-------------------------------
Mean peak period (s)-------------------------------
Mean zero-crossing period (s)4444554445556557544555444444554
Mean peak wave direction-------------------------------
Mean wave direction-------------------------------
Mean directional spread (°)-------------------------------
Mean wind directionNconcentration 80%WNWconcentration 53%Econcentration 98%WNWconcentration 62%NNWconcentration 78%NNEconcentration 95%NNWconcentration 66%NEconcentration 82%NEconcentration 80%ENEconcentration 95%ESEconcentration 96%ESEconcentration 98%ESEconcentration 88%Sconcentration 75%Sconcentration 92%SSWconcentration 86%SWconcentration 93%SSWconcentration 95%SEconcentration 91%ESEconcentration 62%SEconcentration 95%Wconcentration 83%WNWconcentration 96%Wconcentration 98%ENEconcentration 81%ESEconcentration 81%Wconcentration 88%Wconcentration 93%NWconcentration 86%NWconcentration 94%WNWconcentration 99%
Mean wind speed (mph)1823201426271514212921281512272421142218281313181472123282022
Mean water temperature(°C)10.310.29.99.89.89.89.68.98.99.18.89.09.18.68.89.08.98.88.99.09.08.98.98.88.68.58.48.68.58.58.5

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