Llanddwyn Island surfForecast / Wales – Anglesy / UK

information circle12 Day Weather and Surf, issued 6 pm Tuesday 01 Jul 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
15.1° C
(Which is 1.1°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 1.6m 6s and forecast to arrive on Saturday (Jul 05) at 1AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 5s period and expected on Wednesday (Jul 02) at 10AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 1AM (Sat 5th Jul)5ft (1.6m) 6s

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

Updates in  hr  min  s Forecast update imminent
Tue
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sun
13
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.1
SW
0.1
SW
0.2
WSW
0.1
W
0.1
SW
0.4
SW
0.6
SW
0.7
SW
0.6
SW
1.5
SW
1.6
SW
1.2
SW
1.3
SW
1.3
WSW
1.1
NW
1
W
0.7
NW
0.6
NW
0.3
SW
0.2
W
0.4
SW
0.2
WSW
0.5
SW
0.6
SW
0.6
SW
0.8
SW
0.8
SW
0.8
SW
0.7
SW
0.6
SW
0.6
SW
0.6
SW
0.4
SW
0.3
SW
0.1
SW
0.1
W
Period(s) (?)1110109105343666675554635546455566455546
Wave
Graph
(?)Metric surfscale
Energy (?)55946762010136202113128144891013219153731319123841383527151610412
Wind
(km/h)
20
N
10
NNE
15
NNW
10
WNW
5
WNW
10
WSW
20
SSW
15
SW
25
SSW
35
SSW
30
SW
25
SW
30
SW
25
WSW
30
WNW
30
NW
20
WNW
15
WSW
10
WSW
5
NW
10
WNW
15
SW
15
S
15
SSW
20
SW
5
SW
20
SSW
25
SW
20
WSW
20
SW
15
SSW
20
SSW
25
SW
25
SSW
20
SSW
20
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
crosscrossonononononononononcross-
on
crosscross-
on
ononcrosscross-
on
oncross-
on
ononononononononcross-
on
onononcross-
on
High Tide
/ height (m)
2:52AM
3.59
3:36PM
3.07
3:49AM
3.37
4:35PM
2.99
4:50AM
3.20
5:35PM
2.98
5:52AM
3.11
6:32PM
3.03
6:51AM
3.09
7:25PM
3.13
7:46AM
3.15
8:13PM
3.26
8:34AM
3.24
8:56PM
3.42
9:17AM
3.35
9:36PM
3.58
9:56AM
3.46
10:13PM
3.74
10:32AM
3.54
10:48PM
3.89
11:08AM
3.59
11:22PM
4.01
11:43AM
3.62
Low Tide
/ height (m)
9:03PM
0.99
9:44AM
0.82
9:51PM
1.20
10:35AM
1.04
10:48PM
1.35
11:32AM
1.19
11:56PM
1.43
12:36PM
1.26
1:07AM
1.38
1:38PM
1.22
2:08AM
1.24
2:31PM
1.11
2:58AM
1.05
3:16PM
0.96
3:42AM
0.84
3:57PM
0.79
4:22AM
0.65
4:35PM
0.63
5:02AM
0.47
5:13PM
0.51
5:40AM
0.34
5:50PM
0.43
6:20AM
0.25
Tue
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sun
13
Sunrise--4:54--4:56--4:56--4:58--4:58--5:00--5:01--5:01--5:03--5:03--5:05--5:05
Sunset9:46--9:46--9:45--9:45--9:45--9:45--9:44--9:43--9:43--9:42--9:40--9:39--
rain showersclearpart cloudclearclearpart cloudpart cloudpart cloudpart cloudlight rainheavy rainheavy rainlight rainrain showersrain showersclearpart cloudpart cloudpart cloudpart cloudcloudcloudpart cloudlight rainlight rainpart cloudcloudcloudlight rainpart cloudpart cloudlight rainpart cloudcloudcloudpart cloud
Rain (mm)
1--------11623322--------32---1--1----
Temp. °C131314151514151515151415151414161514151513151515161616161616161616161618
Feels °C (?)1011101213101113101091111107111111121311121313141512121314141213131415

Short Range Forecast: Some drizzle, heaviest during Tue afternoon. Very mild (max 15°C on Wed afternoon, min 11°C on Tue night). Winds increasing (light winds from the WNW on Wed night, fresh winds from the SW by Fri morning).

Days 3-6 Weather Summary Heavy rain (total 47mm), heaviest during Sat morning. Very mild (max 16°C on Sun afternoon, min 12°C on Sun night). Winds decreasing (strong winds from the WNW on Sun morning, light winds from the WSW by Mon morning).

Days 6-9 Weather Summary Light rain (total 5mm), mostly falling on Wed morning. Very mild (max 16°C on Wed afternoon, min 12°C on Mon night). Wind will be generally light.

Long Range Forecast: Light rain (total 2mm), mostly falling on Thu night. Very mild (max 18°C on Sun morning, min 15°C on Thu afternoon). Mainly fresh winds.

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

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