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Isle of Man 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
52%
22%

30%

Jan
35%
17%

18%

Feb
36%
20%

16%

Mar
29%
9%

20%

Apr
24%
4%

20%

May
17%
2%

15%

Jun
6%
 
6%

Jul
6%
 
6%

Aug
23%
6%

17%

Sep
32%
7%

25%

Oct
34%
11%

23%

Nov
41%
19%

22%

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
52%
Average Swell
Height
7ft
Average Swell
Period
10s
Dominant Wind
Dominant Swell
Feb
Swell
Consistency
35%
Average Swell
Height
6ft
Average Swell
Period
11s
Dominant Wind
Dominant Swell
Mar
Swell
Consistency
36%
Average Swell
Height
5ft
Average Swell
Period
10s
Dominant Wind
Dominant Swell
Apr
Swell
Consistency
29%
Average Swell
Height
4ft
Average Swell
Period
10s
Dominant Wind
Dominant Swell
May
Swell
Consistency
24%
Average Swell
Height
3ft
Average Swell
Period
9s
Dominant Wind
Dominant Swell
Jun
Swell
Consistency
17%
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
23%
Average Swell
Height
4ft
Average Swell
Period
9s
Dominant Wind
Dominant Swell
Oct
Swell
Consistency
32%
Average Swell
Height
6ft
Average Swell
Period
9s
Dominant Wind
Dominant Swell
Nov
Swell
Consistency
34%
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

Hells Mouth
Barmouth
Tywyn to Aberdovey
Machrihanish
Borth / Ynyslas
Dublin Area
Whitesands Bay
Portrush
Newgale
Tenby South Beach
Manorbier
Freshwater West
Islay (Machir Bay)
Llangennith / Rhossili
Langland Bay
Aberavon
Porthcawl - Coney Beach
Belhaven Bay (Dunbar)
North Malin
St Andrews East
Putsborough
Croyde Beach
Pease Bay
Tramore - Strand
Coldingham Bay
Sandymouth
Bude - Crooklets
Widemouth Bay
Port Bharrapol (Tiree)
Lunan Bay
Beadnell Bay
Sunderland
Polzeath
Harlyn
Rossnowlagh
Constantine
Bundoran - The Peak
Mawgan Porth
Watergate Bay
Lusty Glaze
Newquay - Towan / Great Western
Newquay - Fistral North
Exmouth
Sidmouth (Lyme Bay)
Teignmouth
Perranporth (Droskyn)
Saltburn Beach
Whitsand Bay
Lyme Regis
Stonehaven
Porthtowan
Bantham
Lossiemouth
Gwithian
Strandhill
Falmouth
Praa Sands
Aberdeen - Beach
Whitby
Sandend (Moray Firth)
Sennen
Banff - Beach
Scarborough - North Bay
Scarborough - South Bay
Cayton Bay - Pumphouse
Bournemouth
Enniscrone
Filey
Scarasta
Peterhead (Sandford Bay)