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M2 wave buoy daily means for Feb 2020

Daily means from the M2 wave buoy for Feb 2020, 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

694 wave-buoy observations covered all 29 days. Typical wave height was 6.5 ft (10th–90th percentile 3.1–10.4 ft), while mean peak wave period was 6.4 seconds (10th–90th percentile 4.3–8.8 seconds). Typical wind was 25.4 mph (10th–90th percentile 14.2–33.7 mph) and mean water temperature was 8.8°C (10th–90th percentile 8.3–9.3°C). All 2,775 checked values passed quality control. Across 10 comparable years, mean wave height was above the same-month mean of 4.5 ft and mean wave period was above the same-month mean of 5.6 seconds.

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

Typical Significant Wave Height

6.5ft
Mean: 6.8 ft
P10–P90: 3.1 — 10.4 ft
Recorded extremes

1.2 — 14.6 ft

Available for 232 of 694 hourly samples

Mean Observed Wave Period

6.4secs
P10–P90: 4.3 — 8.8secs
Recorded extremes

2.9 — 14.1secs

Available for 232 of 694 hourly samples

Typical Observed Wind

WSW, 25.4mph
Mean: 24.6 mph
P10–P90: 14.2 — 33.7 mph
Recorded extremes

3.4 — 45.5 mph

Circular concentration: 74%

Available for 693 of 694 hourly samples

Mean Water Temperature

8.8°C
P10–P90: 8.3 — 9.3°C
Recorded extremes

8.1 — 9.5°C

Available for 693 of 694 hourly samples

Compared With Previous Februarys

Historical baseline from 4,912 observations across 10 years.

Wave Height
6.8ft
2.3ft above mean
Historical mean 4.462ft
Wave Period
6.4s
0.8s above mean
Historical mean 5.6s
Water Temperature
8.8°C
0.1°C above mean
Historical mean 8.7°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 Feb 2020Last observation shown
Metric
Mean significant wave height (ft)6QC rejected66237912996669QC rejected9767885766369
Mean maximum wave height (ft)10599331013191514889141413109111212610885914
Mean peak period (s)67564468966588898666777755467
Mean zero-crossing period (s)54554456756555666555555545456
Mean peak wave directionSSWconcentration 88%Sconcentration 98%WSWconcentration 95%NWconcentration 87%SWconcentration 55%Sconcentration 100%Sconcentration 95%Sconcentration 99%SSWconcentration 92%WSWconcentration 96%WSWconcentration 98%SWconcentration 83%Sconcentration 51%Sconcentration 99%Sconcentration 100%Sconcentration 98%SSWconcentration 91%SSWconcentration 80%SSWconcentration 78%WSWconcentration 67%Sconcentration 97%SWconcentration 86%SSWconcentration 60%SSWconcentration 57%Wconcentration 96%Wconcentration 95%WNWconcentration 77%Sconcentration 97%Sconcentration 99%
Mean wave directionSSWconcentration 98%Sconcentration 98%WSWconcentration 98%NWconcentration 82%WSWconcentration 37%Sconcentration 99%SSEconcentration 99%Sconcentration 99%SSWconcentration 97%SWconcentration 97%WSWconcentration 98%SWconcentration 89%SSWconcentration 37%Sconcentration 100%Sconcentration 100%SSWconcentration 99%SSWconcentration 96%SWconcentration 91%SSWconcentration 86%SWconcentration 79%Sconcentration 99%SWconcentration 93%SWconcentration 82%SSWconcentration 66%WSWconcentration 97%Wconcentration 92%Wconcentration 79%Sconcentration 98%SSWconcentration 98%
Mean directional spread (°)26.723.427.628.330.623.921.819.322.528.727.230.622.523.719.021.327.224.819.520.917.627.125.121.423.427.123.419.916.7
Mean wind directionWSWconcentration 94%SSWconcentration 85%Wconcentration 99%WNWconcentration 95%SWconcentration 82%Sconcentration 88%SSEconcentration 97%SSWconcentration 97%SWconcentration 89%WSWconcentration 98%Wconcentration 99%SWconcentration 72%Variableconcentration 28%SSWconcentration 94%SSWconcentration 95%SWconcentration 98%WSWconcentration 96%WSWconcentration 93%SWconcentration 89%WSWconcentration 85%SSWconcentration 98%WSWconcentration 95%Wconcentration 76%WSWconcentration 49%Wconcentration 99%Wconcentration 92%WNWconcentration 89%Sconcentration 94%WSWconcentration 94%
Mean wind speed (mph)2317252413142631313434241920293128262426272516252622172431
Mean water temperature(°C)9.49.39.39.39.39.39.39.29.29.19.08.99.09.09.19.18.98.68.58.58.48.48.38.38.38.38.38.48.5

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