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M2 wave buoy daily means for Jul 2013

Daily means from the M2 wave buoy for Jul 2013, 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

657 wave-buoy observations covered 28 of 31 days (90%). Wave-height and wave-period data were unavailable. Typical wind was 9.2 mph (10th–90th percentile 3.6–15.6 mph) and mean water temperature was 14.6°C (10th–90th percentile 12.7–16.7°C). All 1,970 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 657 hourly samples

Mean Observed Wave Period

-secs
P10–P90: - — -secs

Available for 0 of 657 hourly samples

Typical Observed Wind

Variable, 9.2mph
Mean: 9.4 mph
P10–P90: 3.6 — 15.6 mph
Recorded extremes

0.5 — 27.2 mph

Circular concentration: 18%

Mean Water Temperature

14.6°C
P10–P90: 12.7 — 16.7°C
Recorded extremes

11.6 — 18.5°C

Available for 656 of 657 hourly samples

Compared With Previous Julys

Historical baseline from 2,128 observations across 3 years.

Wave Height
–
Not enough comparable data
Historical mean 2.526ft
Wave Period
–
Not enough comparable data
Historical mean 4.7s
Water Temperature
14.6°C
1.1°C above mean
Historical mean 13.5°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 Jul 2013Last observation shown
Metric
Mean significant wave height (ft)-------------------------------
Mean maximum wave height (ft)-------------------------------
Mean peak period (s)-------------------------------
Mean zero-crossing period (s)-------------------------------
Mean peak wave direction-------------------------------
Mean wave direction-------------------------------
Mean directional spread (°)-------------------------------
Mean wind directionWSWconcentration 83%SSWconcentration 94%WSWconcentration 83%WSWconcentration 86%SWconcentration 62%Sconcentration 98%NWconcentration 48%NNEconcentration 95%NNEconcentration 90%NNEconcentration 98%NEconcentration 87%SSWconcentration 52%NEconcentration 48%Variableconcentration 29%WSWconcentration 42%WSWconcentration 85%SSWconcentration 74%NNEconcentration 83%NNEconcentration 97%ENEconcentration 96%ENEconcentration 92%Econcentration 89%Sconcentration 96%SSEconcentration 98%SSEconcentration 73%Sconcentration 91%SEconcentration 76%SSWconcentration 78%---
Mean wind speed (mph)131913161113675116486693591210111113101167---
Mean water temperature(°C)12.912.913.113.213.513.514.114.715.013.414.015.814.614.616.016.317.317.416.416.116.015.514.913.612.713.413.713.4---

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