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M5 wave buoy daily averages for Sep 2025 last observation shown Data available:  to  Monthly averages for

Average Wave Height

6 ft
1.3 — 11.5 ft

Average Wave period

6 secs
3 — 9 secs

Average Water temperature

16 °C
14.9 — 17.2 °C

Average Wind

SW, 18 mph
0 — 36 mph

Chart showing grouped wave observations for M5. Use the table on this page for a text version of the same measurements.

About M5 wave buoy

M5 is an offshore data buoy in the Atlantic approaches (51.4100°N, 6.4200°W). It is positioned to monitor swell and storm waves moving toward Ireland and the UK, supporting marine warnings. It typically reports waves (height/period/direction) and basic meteorology.

M5 wave buoy daily averages Sep 2025 last observation shown
Day Wave height (ft) Wave Period (s) Wind Direction Wind Speed (mph) Water Temp (°C)
8 6 W 24 16.7
5 6 SSW 9 16.8
6 6 W 18 16.8
7 7 WNW 17 16.8
5 6 SW 14 16.8
6 5 SSE 22 16.9
9 6 SW 22 16.9
6 6 WSW 18 16.8
8 6 SSW 21 16.8
7 6 WSW 22 16.7
10 6 W 29 16.5
8 6 WSW 25 16.2
7 6 W 22 16.0
7 5 SSW 24 15.9
11 7 W 26 15.3
7 6 WSW 20 15.3
10 6 SW 25 15.2
8 6 SSW 18 15.2
7 6 SSW 19 15.3
5 5 N 17 15.4
5 5 N 23 15.1
3 4 NNE 15 14.9
2 4 ENE 9 15.2
3 6 SE 9 15.4
3 6 SE 10 15.5
4 5 SSE 14 15.6
7 6 WSW 16 15.5
4 6 W 11 15.5
3 5 SW 11 15.5
4 5 SSW 18 15.5

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