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M2 wave buoy daily means for Nov 2018

Daily means from the M2 wave buoy for Nov 2018, 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

716 wave-buoy observations covered all 30 days. Mean peak wave period was 6.8 seconds (10th–90th percentile 4.3–9.7 seconds); wave-height data were unavailable. Typical wind was 20.7 mph (10th–90th percentile 12.7–29.8 mph) and mean water temperature was 12.9°C. All 3,470 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 716 hourly samples

Mean Observed Wave Period

6.8secs
P10–P90: 4.3 — 9.7secs
Recorded extremes

3.3 — 17.1secs

Typical Observed Wind

SSE, 20.7mph
Mean: 21.1 mph
P10–P90: 12.7 — 29.8 mph
Recorded extremes

4.6 — 45 mph

Circular concentration: 52%

Available for 714 of 716 hourly samples

Mean Water Temperature

12.9°C
P10–P90: 12.9 — 12.9°C
Recorded extremes

12.8 — 13°C

Available for 608 of 716 hourly samples

Compared With Previous Novembers

Historical baseline from 4,904 observations across 7 years.

Wave Height
–
Not enough comparable data
Historical mean 4.954ft
Wave Period
6.8s
0.9s above mean
Historical mean 5.9s
Water Temperature
12.9°C
0.4°C below mean
Historical mean 13.3°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 2018Last observation shown
Metric
Mean significant wave height (ft)------------------------------
Mean maximum wave height (ft)------------------------------
Mean peak period (s)54886677810975976666765565578129
Mean zero-crossing period (s)------------------------------
Mean peak wave directionWconcentration 71%Wconcentration 64%Sconcentration 100%Sconcentration 98%SSEconcentration 92%Sconcentration 99%SSWconcentration 80%Sconcentration 94%SSEconcentration 98%Sconcentration 97%Sconcentration 96%Sconcentration 99%SSWconcentration 84%Sconcentration 100%Sconcentration 99%Sconcentration 98%ESEconcentration 84%ENEconcentration 97%ENEconcentration 98%ENEconcentration 98%ENEconcentration 69%ESEconcentration 84%ENEconcentration 94%ENEconcentration 94%NEconcentration 94%ENEconcentration 75%SSEconcentration 93%Sconcentration 99%Sconcentration 99%SSWconcentration 83%
Mean wave direction------------------------------
Mean directional spread (°)25.929.417.318.832.124.540.222.518.525.824.219.526.817.016.320.237.521.919.620.127.434.329.126.727.828.625.021.723.929.3
Mean wind directionWNWconcentration 98%WSWconcentration 72%Sconcentration 98%Sconcentration 73%SSEconcentration 95%SSEconcentration 98%SWconcentration 59%Sconcentration 97%Sconcentration 95%SSWconcentration 96%SSWconcentration 97%SSWconcentration 97%SWconcentration 86%Sconcentration 98%Sconcentration 97%SSEconcentration 89%Econcentration 98%Econcentration 100%Econcentration 98%ENEconcentration 97%ESEconcentration 82%ESEconcentration 94%Econcentration 99%Econcentration 97%Econcentration 96%ESEconcentration 93%SSEconcentration 76%Sconcentration 90%SSWconcentration 73%WSWconcentration 99%
Mean wind speed (mph)151932151523172327161924233023141422242621161618181525332324
Mean water temperature(°C)13.012.912.912.912.912.912.912.912.912.912.912.912.912.912.912.912.912.912.912.912.912.912.912.912.912.9----

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