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M2 wave buoy daily means for Jun 2023

Daily means from the M2 wave buoy for Jun 2023, 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

707 wave-buoy observations covered all 30 days. Typical wave height was 1.9 ft (10th–90th percentile 1–3.8 ft), while mean peak wave period was 4.7 seconds (10th–90th percentile 2.8–7.1 seconds). Typical wind was 11.9 mph (10th–90th percentile 4.8–19.7 mph) and mean water temperature was 13.9°C (10th–90th percentile 11.5–16.3°C). 5 of 4,242 checked values (0.1%) were excluded by quality control. Across 11 comparable years, mean wave height was below the same-month mean of 2.6 ft and mean wave period was below the same-month mean of 5.1 seconds.

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

Typical Significant Wave Height

1.9ft
Mean: 2.1 ft
P10–P90: 1 — 3.8 ft
Recorded extremes

0.8 — 6.5 ft

Mean Observed Wave Period

4.7secs
P10–P90: 2.8 — 7.1secs
Recorded extremes

2.5 — 13.4secs

Available for 702 of 707 hourly samples

Typical Observed Wind

ESE, 11.9mph
Mean: 12 mph
P10–P90: 4.8 — 19.7 mph
Recorded extremes

0.9 — 26.3 mph

Circular concentration: 31%

Mean Water Temperature

13.9°C
P10–P90: 11.5 — 16.3°C
Recorded extremes

11 — 17.9°C

Compared With Previous Junes

Historical baseline from 7,228 observations across 11 years.

Wave Height
2.1ft
0.5ft below mean
Historical mean 2.625ft
Wave Period
4.7s
0.4s below mean
Historical mean 5.1s
Water Temperature
13.9°C
2°C above mean
Historical mean 11.9°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 Jun 2023Last observation shown
Metric
Mean significant wave height (ft)332212244321122111322144333223
Mean maximum wave height (ft)442223477532222122432266545435
Mean peak period (s)453334455797344665453555545534
Mean zero-crossing period (s)343333344455334444443344444434
Mean peak wave directionENEconcentration 94%ENEconcentration 90%ENEconcentration 84%ENEconcentration 94%Econcentration 93%Econcentration 90%ENEconcentration 94%ENEconcentration 94%ENEconcentration 94%Econcentration 57%Sconcentration 99%Sconcentration 83%NEconcentration 77%Econcentration 87%ENEconcentration 78%SEconcentration 54%Sconcentration 87%SSEconcentration 61%Sconcentration 92%Sconcentration 95%SSWconcentration 82%SSEconcentration 34%Sconcentration 96%Sconcentration 98%Sconcentration 96%SWconcentration 78%Sconcentration 97%SSWconcentration 59%Wconcentration 52%Sconcentration 89%
Mean wave directionENEconcentration 95%ENEconcentration 93%ENEconcentration 94%ENEconcentration 94%Econcentration 91%Econcentration 90%ENEconcentration 96%ENEconcentration 97%ENEconcentration 97%ENEconcentration 96%Sconcentration 93%Sconcentration 94%NEconcentration 80%Econcentration 96%Econcentration 94%SEconcentration 76%Sconcentration 90%SSEconcentration 80%Sconcentration 99%Sconcentration 98%SSWconcentration 93%SSEconcentration 65%Sconcentration 95%Sconcentration 100%Sconcentration 99%SSWconcentration 94%Sconcentration 99%SSWconcentration 75%WSWconcentration 54%Sconcentration 94%
Mean directional spread (°)177.7178.0170.8173.6194.1207.3193.4138.7133.8151.170.6108.5175.5213.4187.3143.9151.6170.6191.4168.1198.5170.4187.6173.8165.5149.4173.0182.5175.6175.2
Mean wind directionNEconcentration 96%NEconcentration 91%NEconcentration 92%NEconcentration 91%NEconcentration 93%NEconcentration 93%ENEconcentration 94%ENEconcentration 98%ENEconcentration 98%Econcentration 75%SSEconcentration 75%NNEconcentration 32%NEconcentration 73%ENEconcentration 89%Econcentration 82%ESEconcentration 69%ESEconcentration 87%SEconcentration 77%Sconcentration 98%Sconcentration 98%SWconcentration 76%Econcentration 75%Sconcentration 99%Sconcentration 97%Sconcentration 74%SWconcentration 90%Sconcentration 98%SWconcentration 52%WSWconcentration 61%SWconcentration 93%
Mean wind speed (mph)141391110121418171066911658619131082118141317101417
Mean water temperature(°C)12.312.011.911.811.711.711.711.611.711.912.313.313.113.514.314.614.214.515.816.116.517.115.714.614.815.415.615.715.615.5

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