Llanddwyn Island Surf Forecast

/ Wales – Anglesy (10 surf breaks) /

UK (471 surf breaks) / Lat Long: (53.13° N 4.42° W)

Surf Forecasts:

Llanddwyn Island surfForecast / Wales – Anglesy / UK

12 Day Weather and Surf, issued 6 pm Saturday 30 Aug 2025 BST

Forecast update in hr min s Forecast update imminent

Llanddwyn Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Llanddwyn Island sea temperature is 17.8° C
(Which is 2.1°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Llanddwyn Island this week:

The most powerful waves expected at Llanddwyn Island in the next 12 days are 3.0m 9s and forecast to arrive on Wednesday (Sep 03) at 4PM. Winds are predicted to be onshore at the time the swell arrives.

Wave Type	Time (BST) & Date	Wave Height & Period
Next good surf (1 star+)	-	-
Best Surf	-	-
Most Powerful	4PM (Wed 3rd Sep)	10ft (3.0m) 9s

Table - best surf conditions forecast for Llanddwyn Island over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Heavy rain (total 29mm), heaviest during Sat afternoon. Very mild (max 17°C on Sat afternoon, min 13°C on Mon night). Winds decreasing (strong winds from the SSW on Sun afternoon, light winds from the SSW by Mon night).											Days 3-6 Weather Summary Heavy rain (total 40mm), heaviest during Wed night. Very mild (max 17°C on Tue afternoon, min 12°C on Thu night). Winds increasing (calm on Tue afternoon, strong winds from the SSW by Wed morning).
	Sat 30		Sunday 31			Monday 01			Tuesday 02			Wednesday 03			Thursday 04			Friday 05
	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	SSW	SW	SW	SW	SW	SW	SW	WSW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SSW	SSW
Period(s) (?)	6	8	8	8	8	8	6	7	7	7	8	6	9	9	9	9	9	8	8	5	6
Wave Graph (?)
Energy (?)	271	564	707	1023	746	276	145	172	49	36	59	278	1246	246	92	145	91	84	65	76	227
Wind (km/h)	S	SSW	SSW	SSW	SSW	SW	SW	SW	S	SW	S	SSW	SSW	SSE	W	SW	W	W	SW	S	SSE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	on	cross- on	cross- on	cross- on	on	on	on	cross- on	on	cross- on	cross- on	on	cross	cross- on	on	cross- on	cross- on	on	cross- on	cross- on
High Tide / height (m)		2:41AM 3.01		3:10PM 2.85	3:53AM 2.74		4:45PM 2.70		5:46AM 2.66	6:33PM 2.79		7:13AM 2.79		7:39PM 3.04	8:06AM 3.02		8:22PM 3.35	8:44AM 3.29		8:55PM 3.69	9:17AM 3.57
Low Tide / height (m)		8:56PM 1.26	9:23AM 1.42		9:53PM 1.51	10:32AM 1.63		11:24PM 1.65	12:12PM 1.64		1:06AM 1.52		1:34PM 1.43	2:10AM 1.22		2:26PM 1.11	2:55AM 0.84		3:07PM 0.78	3:34AM 0.45

	Sat 30		Sunday 31			Monday 01			Tuesday 02			Wednesday 03			Thursday 04			Friday 05
Sunrise	-	-	6:24	-	-	6:26	-	-	6:28	-	-	6:28	-	-	6:31	-	-	6:33	-	-	6:33
Sunset	8:12	-	-	8:09	-	-	8:07	-	-	8:05	-	-	8:02	-	-	8:00	-	-	7:58	-	-

Rain (mm)	5	-	2	1	10	3	3	3	2	-	4	1	-	23	1	4	7	-	-	-	2
Temp. °C	17	15	16	16	15	16	16	14	16	17	17	17	17	15	15	16	13	14	15	14	14
Feels °C (?)	10	7	7	7	7	10	11	10	14	16	11	9	9	13	10	11	6	10	11	10	8

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Wales - Anglesy

Wind Update The cross-on wind has turned onshore at Llanddwyn Island (strong winds from the SSW at Caernarfon Airport 7 km from Llanddwyn Island). A 2.3m swell from the SW
1 hour 32 minutes ago Llanddwyn Island

Expand

View all

1 h 32 min ago

44 km/h

SSW

Onshore

Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Llanddwyn Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

Information about the Llanddwyn Island Surf forecast

The above surf forecast table for Llanddwyn Island provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Llanddwyn Island can be found by selecting the local surf guide option on the grey menu. Our Llanddwyn Island surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Llanddwyn Island) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Llanddwyn Island may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Are you planning a holiday in Anglesy? If you are looking for accommodation near Llanddwyn Island, camping, hotels and holiday cottages in Anglesy, consider staying in Anglesey which is 15 km (9 miles) away. Other places in and around Anglesy where you can find information about places to rent, and car hire include Holyhead which is 25 km (16 miles) away, Bangor, Porthmadog and Llandudno.