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M2 wave buoy daily means for Nov 2003

Daily means from the M2 wave buoy for Nov 2003, 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

691 wave-buoy observations covered all 30 days. Typical wave height was 4.9 ft (10th–90th percentile 2.6–8.5 ft), while mean zero-crossing wave period was 5.1 seconds (10th–90th percentile 4–6 seconds). Typical wind was 20.7 mph (10th–90th percentile 11.5–29.9 mph) and mean water temperature was 13.1°C (10th–90th percentile 12.5–13.6°C). All 3,392 checked values passed quality control.

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

Typical Significant Wave Height

4.9ft
Mean: 5.5 ft
P10–P90: 2.6 — 8.5 ft
Recorded extremes

1.3 — 15.4 ft

Available for 679 of 691 hourly samples

Mean Observed Wave Period

5.1secs
P10–P90: 4 — 6secs
Recorded extremes

4 — 8secs

Available for 676 of 691 hourly samples

Typical Observed Wind

SW, 20.7mph
Mean: 20.5 mph
P10–P90: 11.5 — 29.9 mph
Recorded extremes

0 — 42.6 mph

Circular concentration: 63%

Available for 676 of 691 hourly samples

Mean Water Temperature

13.1°C
P10–P90: 12.5 — 13.6°C
Recorded extremes

12.3 — 13.8°C

Available for 677 of 691 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 Nov 2003Last observation shown
Metric
Mean significant wave height (ft)6778965774755QC rejected54555522245555QC rejected3
Mean maximum wave height (ft)------------------------------
Mean peak period (s)------------------------------
Mean zero-crossing period (s)565666665555575455554444555565
Mean peak wave direction------------------------------
Mean wave direction------------------------------
Mean directional spread (°)------------------------------
Mean wind directionWconcentration 61%SWconcentration 98%Wconcentration 95%SSWconcentration 100%Sconcentration 97%Sconcentration 77%SEconcentration 90%ESEconcentration 97%SSEconcentration 92%SSWconcentration 98%Sconcentration 98%WSWconcentration 89%SSWconcentration 84%SWconcentration 76%WNWconcentration 98%WNWconcentration 87%WSWconcentration 92%SWconcentration 96%SWconcentration 71%WSWconcentration 84%WSWconcentration 96%Wconcentration 97%NWconcentration 93%WSWconcentration 67%SWconcentration 89%Wconcentration 95%Wconcentration 100%SSWconcentration 97%SWconcentration 75%Wconcentration 74%
Mean wind speed (mph)23232428311716232317271822342318191714171191219222221222710
Mean water temperature(°C)13.613.613.613.613.613.613.413.313.213.213.213.213.113.313.213.213.113.013.113.012.912.812.612.612.612.612.512.512.612.6

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