Weekend Surf Forecast - April 28th to 30th

Report Date: Friday 28 April 2017

For tips on forecasting see my book Surf Science, in paperback and animated versions Available at www.surfscience.org

Summary

Small in many places, with a pulse of swell later

Best bet

Northwest Ireland

Synopsis at 00:00 UTC

Today’s chart shows a fairly tight area of low pressure just east of Cape Farewell, expanding southwest towards the Bay of Biscay and weakening over the next few days. A short fetch on its southwest flank is generating a pulse of surf for northwest facing areas. The rest of the North Atlantic contains quite weak pressure gradients, with an area of relatively high pressure west of the Azores. The upper airstream is moderate, and local pressure gradients are weak or moderate.
NAO index (large positive values usually mean potentially good surf): +20 mb

Area forecasts

Southwest Wales Friday:
Very small or flat practically everywhere, with light northwest winds, backing west later

Saturday:
Continuing very small or flat in most places, with some short-period windseas generated by fresh southerly winds, gusting strong southeast later

Sunday:
Wave heights increase to around three feet or so, with some tiny longer-period swell mixed with the dominant windseas, driven by strong southeast winds

North Devon and Cornwall

Friday:
Very small or flat in most places, with light perhaps moderate northwest winds

Saturday:
A small swell arrives, perhaps reaching three feet at exposed spots later, with fresh south winds gusting strong southeast later

Sunday:
The swell becomes very mixed, around three or four feet at exposed spots, with fresh gusting strong southerly winds veering southwest then west later

South Coast of England

Friday:
Very small or flat practically everywhere, with light winds from a westerly quarter

Saturday:
Continuing very small or flat, with moderate southerly winds becoming fresh southeast later

Sunday:
Winds back southerly, fresh perhaps gusting strong, and wave heights pick up to around three feet and lumpy

East coast of England

Friday:
Average-quality north swell, around three or four feet at northerly exposures, with moderate northerly winds, decreasing steadily throughout the day

Saturday:
The north swell drops to around two or three feet, and winds change to moderate southeast, gusting fresh later

Sunday:
Winds increase to strong perhaps gale-force southeast, and wave heights increase to a lumpy four or five feet from the east

North Coast of Scotland

Friday:
Small, average-quality north swell, up to three feet or so at exposed spots, with light east then moderate perhaps fresh southeast winds

Saturday:
The north swell disappears and a small west swell arrives, around three or four feet at westerly exposures, with strong southeast winds

Sunday:
The west swell becomes more lined up, around four feet or so at exposed spots, but struggles against strong perhaps gale-force southeast winds

Northwest Ireland

Friday:
Small, average-quality west swell, up to about three feet or so at westerly exposures, with light to moderate southerly winds

Saturday:
A more solid swell arrives from the west, up to six feet at westerly exposures, smaller elsewhere, with strong south-southeast winds

Sunday:
The swell increases and swings more northwest, around to eight feet at exposed spots, with strong easterly winds

Southwest Ireland

Friday:
Small, average-quality swell, averaging around three feet or so, with lumpy conditions in many places in fresh southwest winds

Saturday:
The swell increases to six feet or so from the west, and winds increase to strong or gale-force southerlies

Sunday:
Winds veer west-northwest, strong to gale-force, and wave heights increase to a very lumpy ten feet or so at exposed spots

Southwest France

Friday:
Small, weak surf, struggling to reach three feet in most places, with light becoming moderate then fresh northeast winds

Saturday:
Wave heights drop to almost nothing, and winds change to moderate or fresh southeast

Sunday:
A swell arrives from the west-northwest, up to about three or four feet, but hampered by fresh gusting strong southwest winds, veering west later

North coast of Spain – east of Gijón

Friday:
Small, weak north swell, struggling to exceed three feet anywhere, with windless conditions then moderate to fresh north-easterlies

Saturday:
Wave heights drop to nothing practically everywhere, and winds are moderate to fresh southeast

Sunday:
A more solid swell arrives from the west-northwest, around four or five feet at exposed spots, with strong southwest winds veering west later

North coast of Spain – west of Gijón

Friday:
Small, sloppy north swell, struggling to exceed three feet at most spots, with fresh east-northeast winds

Saturday:
The swell drops to almost nothing at first but picks up later from the northwest, perhaps hitting three feet, with light northwest winds

Sunday:
The swell picks up to around five or six feet, and winds pick up to strong westerlies, making things lumpy at exposed spots

Northwest Galicia
Friday:
Small, weak north swell, perhaps failing to reach many spots altogether, with fresh to strong northeast winds
Saturday:
A longer-period west-northwest swell arrives, around three feet or so at exposed spots, hampered by fresh west-southwest winds
Sunday:
Wave heights pick up to well over six feet at exposed spots, with very lumpy conditions in strong westerly winds

Portugal – north of Lisbon

Friday:
Average-quality north-northwest swell, perhaps around four feet or so at northwest exposures, smaller elsewhere, with moderate to fresh easterly winds

Saturday:
Small at first but then a west-northwest swell arrives, around three feet or so, hampered by fresh westerly winds

Sunday:
The swell becomes more solid, hitting six feet or so at exposed spots, but accompanied by fresh to strong west or northwest winds

*Portugal – south of Lisbon * Friday:
Small northwest swell, around three feet or so at exposed spots, with fresh to strong east or northeast winds

Saturday:
The swell drops to almost nothing, and winds become moderate then fresh west-northwest

Sunday:
A northwest swell arrives, around four feet or so at northwest exposures, hampered in many places by fresh westerly winds veering northwest later