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Anglesey Seasonal Surf Averages

Based on the last ten years data for this location this page gives seasonal trends and an idea of what kind of conditions you can expect and when. Of course these are just averages - it's worth reading carefully to understand exactly what they mean and to recognise the kind of variation you could expect on a trip because an average can never tell the whole story. Click on a month below to see more detail.
If you want a past forecast for a specific date range then click here.

Local Photo


Swell Consistency and Wind Overview

Wind Swell Ground Swell
51%
23%

28%

Jan
43%
22%

21%

Feb
36%
22%

14%

Mar
25%
8%

17%

Apr
22%
3%

19%

May
16%
2%

14%

Jun
6%
 
6%

Jul
6%
 
6%

Aug
22%
6%

16%

Sep
31%
7%

24%

Oct
35%
13%

22%

Nov
41%
20%

21%

Dec
This graph shows the percentage of days that had a ridable wind swell (7 seconds period or more) or groundswell (10 seconds period or more) of over 3ft. It also shows the dominant wind direction. Not all of these days will neccessarily give great surf, and very short lived wind swells or longer period secondary swells may produce surf not recorded, but it gives a clear idea of the seasonal trend and a rough guide to the chances of scoring something ridable.

Monthly Overview

Jan
Swell
Consistency
51%
Average Swell
Height
7ft
Average Swell
Period
11s
Dominant Wind
Dominant Swell
Feb
Swell
Consistency
43%
Average Swell
Height
7ft
Average Swell
Period
11s
Dominant Wind
Dominant Swell
Mar
Swell
Consistency
36%
Average Swell
Height
5ft
Average Swell
Period
11s
Dominant Wind
Dominant Swell
Apr
Swell
Consistency
25%
Average Swell
Height
4ft
Average Swell
Period
10s
Dominant Wind
Dominant Swell
May
Swell
Consistency
22%
Average Swell
Height
3ft
Average Swell
Period
9s
Dominant Wind
Dominant Swell
Jun
Swell
Consistency
16%
Average Swell
Height
3ft
Average Swell
Period
9s
Dominant Wind
Dominant Swell
Jul
Swell
Consistency
6%
Average Swell
Height
2ft
Average Swell
Period
8s
Dominant Wind
Dominant Swell
Aug
Swell
Consistency
6%
Average Swell
Height
2ft
Average Swell
Period
8s
Dominant Wind
Dominant Swell
Sep
Swell
Consistency
22%
Average Swell
Height
4ft
Average Swell
Period
9s
Dominant Wind
Dominant Swell
Oct
Swell
Consistency
31%
Average Swell
Height
6ft
Average Swell
Period
9s
Dominant Wind
Dominant Swell
Nov
Swell
Consistency
35%
Average Swell
Height
6ft
Average Swell
Period
10s
Dominant Wind
Dominant Swell
Dec
Swell
Consistency
41%
Average Swell
Height
7ft
Average Swell
Period
10s
Dominant Wind
Dominant Swell

Understanding this Data

These swell averages are calculated ONLY on swells of more than 7 seconds period. This means this is the average height of a swell that's likely to produce ridable surf NOT an average of every wave heading toward the beach in a month. Likewise the period is the average period OVER 7 seconds. There will be days that have short period wind swells that won't produce and ridable swell and these are excluded from the averages. The consistency figure gives the percentage of days that meet this condition.

For example if the consistency is 50% you could expect the 'average' swell for about 15 days in the month. Of course an average tells only part of the story. A combination of very large and very small swells may produce the same average as a consistent medium sized swell.

Monthly Data

January
February
March
April
May
June
July
August
September
October
November
December

Nearby Spots

Barmouth
Tywyn to Aberdovey
Borth / Ynyslas
Isle of Man
Newgale
Whitesands Bay
Dublin Area
Tenby South Beach
Manorbier
Llangennith / Rhossili
Freshwater West
Langland Bay
Aberavon
Porthcawl - Coney Beach
Putsborough
Croyde Beach
Sandymouth
Bude - Crooklets
Widemouth Bay
Machrihanish
Polzeath
Harlyn
Constantine
Mawgan Porth
Watergate Bay
Tramore - Strand
Lusty Glaze
Newquay - Towan / Great Western
Exmouth
Newquay - Fistral North
Sidmouth (Lyme Bay)
Teignmouth
Whitsand Bay
Perranporth (Droskyn)
Portrush
Lyme Regis
Porthtowan
Bantham
Gwithian
Falmouth
Praa Sands
Islay (Machir Bay)
Sennen
Belhaven Bay (Dunbar)
North Malin
Pease Bay
Bournemouth
St Andrews East
Sunderland
Coldingham Bay
Beadnell Bay
Saltburn Beach
Rossnowlagh
Bundoran - The Peak
Isle of Wight - Compton
Lunan Bay
Port Bharrapol (Tiree)
Whitby
Vazon Bay - Beach - Guernsey
Strandhill
Scarborough - South Bay
Scarborough - North Bay
Cayton Bay - Pumphouse
East Wittering
Filey
Stonehaven
Trestaou
Le Dossen
Pors Ar Villec (Locquirec)
Le Rozel