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M2 wave buoy daily means for Nov 2019

Daily means from the M2 wave buoy for Nov 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

720 wave-buoy observations covered all 30 days. Typical wave height was 4.6 ft (10th–90th percentile 1.9–8.8 ft), while mean peak wave period was 6.1 seconds (10th–90th percentile 4.1–8.1 seconds). Typical wind was 17.4 mph (10th–90th percentile 7.9–28.8 mph) and mean water temperature was 13.3°C (10th–90th percentile 12.5–14.2°C). All 2,880 checked values passed quality control. Across 8 comparable years, mean wave height was the same as the same-month mean of 5 ft and mean wave period was above the same-month mean of 6 seconds.

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

Typical Significant Wave Height

4.6ft
Mean: 5 ft
P10–P90: 1.9 — 8.8 ft
Recorded extremes

0.8 — 11.9 ft

Available for 240 of 720 hourly samples

Mean Observed Wave Period

6.1secs
P10–P90: 4.1 — 8.1secs
Recorded extremes

2.6 — 15.5secs

Available for 240 of 720 hourly samples

Typical Observed Wind

Variable, 17.4mph
Mean: 18.3 mph
P10–P90: 7.9 — 28.8 mph
Recorded extremes

0.8 — 40.6 mph

Circular concentration: 25%

Mean Water Temperature

13.3°C
P10–P90: 12.5 — 14.2°C
Recorded extremes

12 — 14.3°C

Compared With Previous Novembers

Historical baseline from 5,620 observations across 8 years.

Wave Height
5ft
0ft above mean
Historical mean 4.954ft
Wave Period
6.1s
0.1s above mean
Historical mean 6s
Water Temperature
13.3°C
0.1°C above mean
Historical mean 13.2°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 Nov 2019Last observation shown
Metric
Mean significant wave height (ft)5434725554785884326107552465534
Mean maximum wave height (ft)8645102888610127121255381410872696645
Mean peak period (s)6967646655665775556776656710655
Mean zero-crossing period (s)564453454455455444565553455544
Mean peak wave directionSconcentration 98%Sconcentration 99%Variableconcentration 5%SEconcentration 44%NNEconcentration 98%Wconcentration 46%ENEconcentration 52%NNEconcentration 94%Variableconcentration 25%ENEconcentration 62%Wconcentration 76%WNWconcentration 84%SWconcentration 42%NEconcentration 93%NNEconcentration 99%NEconcentration 97%Nconcentration 98%Nconcentration 37%SSEconcentration 99%SSEconcentration 96%ESEconcentration 75%Econcentration 94%ENEconcentration 93%Econcentration 47%SSEconcentration 84%SSEconcentration 95%SSEconcentration 66%NNEconcentration 74%NEconcentration 67%ESEconcentration 79%
Mean wave directionSconcentration 99%Sconcentration 99%Variableconcentration 16%ESEconcentration 36%NNEconcentration 99%WSWconcentration 43%ENEconcentration 35%NNEconcentration 99%Variableconcentration 29%ENEconcentration 66%Wconcentration 87%WNWconcentration 90%SWconcentration 32%NEconcentration 94%NNEconcentration 100%NNEconcentration 97%Nconcentration 99%NEconcentration 75%SSEconcentration 99%SSEconcentration 99%ESEconcentration 89%Econcentration 95%ENEconcentration 94%ENEconcentration 62%SSEconcentration 97%SSEconcentration 97%SEconcentration 66%NNEconcentration 92%ENEconcentration 92%ESEconcentration 91%
Mean directional spread (°)21.621.326.024.322.332.527.226.438.026.028.725.730.121.625.131.626.435.520.019.030.835.026.735.328.527.828.327.233.638.0
Mean wind directionSconcentration 91%Variableconcentration 23%NWconcentration 75%NNEconcentration 52%Nconcentration 93%WSWconcentration 45%NEconcentration 62%NNEconcentration 67%Variableconcentration 13%Econcentration 39%WNWconcentration 98%WNWconcentration 96%Variableconcentration 26%NNEconcentration 97%NNEconcentration 99%Nconcentration 95%Nconcentration 94%Econcentration 49%SSEconcentration 97%SSEconcentration 98%ESEconcentration 95%ESEconcentration 98%ENEconcentration 97%ESEconcentration 35%SSEconcentration 84%SSEconcentration 87%NEconcentration 62%NNEconcentration 79%Econcentration 91%ESEconcentration 96%
Mean wind speed (mph)219121521111715211831312128251516924301718189162215171114
Mean water temperature(°C)14.214.314.314.214.114.014.014.013.913.813.513.413.313.213.213.113.012.912.812.812.912.912.812.712.712.612.512.512.512.3

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