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M2 wave buoy daily means for Jul 2024

Daily means from the M2 wave buoy for Jul 2024, 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

729 wave-buoy observations covered all 31 days. Typical wave height was 2.3 ft (10th–90th percentile 1.2–4.2 ft), while mean peak wave period was 4.4 seconds (10th–90th percentile 2.8–6.2 seconds). Typical wind was 11.5 mph (10th–90th percentile 5.5–18.7 mph) and mean water temperature was 14°C (10th–90th percentile 12.8–15.1°C). 8 of 4,374 checked values (0.2%) were excluded by quality control. Across 12 comparable years, mean wave height was the same as the same-month mean of 2.4 ft and mean wave period was below the same-month mean of 4.9 seconds.

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

Typical Significant Wave Height

2.3ft
Mean: 2.4 ft
P10–P90: 1.2 — 4.2 ft
Recorded extremes

0.4 — 5.8 ft

Mean Observed Wave Period

4.4secs
P10–P90: 2.8 — 6.2secs
Recorded extremes

2.6 — 9.1secs

Available for 721 of 729 hourly samples

Typical Observed Wind

WSW, 11.5mph
Mean: 11.9 mph
P10–P90: 5.5 — 18.7 mph
Recorded extremes

0.8 — 27 mph

Circular concentration: 35%

Mean Water Temperature

14°C
P10–P90: 12.8 — 15.1°C
Recorded extremes

12.1 — 16.5°C

Compared With Previous Julys

Historical baseline from 8,343 observations across 12 years.

Wave Height
2.4ft
0ft below mean
Historical mean 2.428ft
Wave Period
4.4s
0.5s below mean
Historical mean 4.9s
Water Temperature
14°C
In line with the historical mean
Historical mean 14°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 2024Last observation shown
Metric
Mean significant wave height (ft)2335332143431112234233233321212
Mean maximum wave height (ft)4457443265662124356444454432323
Mean peak period (s)4455444456554344545546556453334
Mean zero-crossing period (s)3444444344443334444444444443333
Mean peak wave directionWNWconcentration 77%NWconcentration 74%SSWconcentration 64%Wconcentration 94%WSWconcentration 78%WNWconcentration 57%WSWconcentration 55%SSEconcentration 60%ENEconcentration 92%NWconcentration 31%Nconcentration 92%NNEconcentration 98%NNEconcentration 76%Econcentration 57%Sconcentration 54%NNWconcentration 65%Sconcentration 79%Sconcentration 98%Sconcentration 99%Sconcentration 69%WSWconcentration 51%Sconcentration 93%NEconcentration 40%SSWconcentration 81%Sconcentration 96%SWconcentration 78%SSEconcentration 92%SWconcentration 63%SSWconcentration 81%WNWconcentration 47%NEconcentration 85%
Mean wave directionWNWconcentration 77%NWconcentration 80%SSWconcentration 74%Wconcentration 96%SWconcentration 85%Wconcentration 53%SWconcentration 68%SSEconcentration 79%ENEconcentration 95%NNWconcentration 58%Nconcentration 90%NNEconcentration 97%NEconcentration 91%Econcentration 61%Sconcentration 83%NNWconcentration 57%Sconcentration 73%Sconcentration 99%Sconcentration 99%Sconcentration 79%WSWconcentration 52%Sconcentration 98%ENEconcentration 45%Sconcentration 85%Sconcentration 98%SWconcentration 85%SSEconcentration 96%SSWconcentration 87%SSWconcentration 95%Variableconcentration 25%NEconcentration 83%
Mean directional spread (°)188.2218.9212.2233.1198.9201.2192.8206.4181.2201.0190.0191.6210.1229.9195.3197.1145.3216.7203.7192.4209.2170.4224.4206.9154.9213.8225.2223.7190.7202.8193.8
Mean wind directionWNWconcentration 81%Wconcentration 70%WSWconcentration 56%Wconcentration 96%WSWconcentration 68%Wconcentration 77%Wconcentration 72%ESEconcentration 63%ENEconcentration 78%NWconcentration 63%NNWconcentration 95%NNWconcentration 96%NWconcentration 40%SSEconcentration 84%Econcentration 37%WNWconcentration 67%SWconcentration 78%Sconcentration 99%Sconcentration 97%SWconcentration 45%SWconcentration 79%SSWconcentration 82%Variableconcentration 27%Sconcentration 95%SWconcentration 80%SWconcentration 87%SSWconcentration 84%SWconcentration 67%Sconcentration 92%Nconcentration 50%Nconcentration 93%
Mean wind speed (mph)13151520141311914141612559111217181314109161113791079
Mean water temperature(°C)13.313.213.012.712.913.213.313.312.912.912.913.013.414.214.614.815.014.614.614.614.614.714.514.113.813.814.214.514.815.516.0

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