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Sea Crossings

State of Sea until 1800 Monday 25 March 2019

Dublin - Holyhead

Moderate.

Rosslare - South Wales

Moderate.

Cork - South Wales

Moderate.

Rosslare - France

Moderate to rough.

Cork - France

Moderate to rough.

Legend

Sea Crossings WMO Code Wave height Characteristics
0 0 metres (0 ft) Calm (glassy)
1 0 to 0.1 metres (0.00 to 0.33 ft) Calm (rippled)
2 0.1 to 0.5 metres (3.9 in to 1 ft 7.7 in) Smooth (wavelets)
3 0.5 to 1.25 metres (1 ft 8 in to 4 ft 1 in) Slight
4 1.25 to 2.5 metres (4 ft 1 in to 8 ft 2 in) Moderate
5 2.5 to 4 metres (8 ft 2 in to 13 ft 1 in) Rough
6 4 to 6 metres (13 to 20 ft) Very rough
7 6 to 9 metres (20 to 30 ft) High
8 9 to 14 metres (30 to 46 ft) Very high
9 Over 14 metres (46 ft) Phenomenal

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