Llanddwyn Island surfForecast / Wales – Anglesy / UK

information circle12 Day Weather and Surf, issued 6 am Friday 04 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
15.3° C
(Which is 1.0°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 1.8m 7s and forecast to arrive on Friday (Jul 04) at 10PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Monday (Jul 07) at 7AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful10PM (Fri 4th Jul)6ft (1.8m) 7s

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

Updates in  hr  min  s Forecast update imminent
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
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 (?)
0.8
SW
1.6
SW
1.8
SW
1.3
SW
1.2
SW
1.1
WSW
1.2
W
0.6
SW
0.4
SW
0.2
WSW
0.5
WNW
0.5
NW
0.6
WNW
0.3
WNW
0.1
SW
0.1
SW
0.1
SW
0.1
SW
0.2
WSW
0.4
SW
0.4
SW
0.4
SW
0.1
W
0.1
W
0.1
W
0.1
W
0.1
W
0.6
SW
0.5
SW
0.3
SW
0.1
W
Period(s) (?)467757566644445444-----3434111177544410
Wave
Graph
(?)Metric surfscale
Energy (?)1916027914474110624894139156111100000164363221151123
Wind
(km/h)
25
SSW
35
SW
30
SW
25
SW
25
SSW
20
W
25
WNW
25
NW
25
NNW
30
NNW
25
NW
5
NNW
15
NW
10
WNW
10
SSW
5
WSW
10
SW
10
S
5
WSW
10
SW
5
SSE
10
S
15
SSW
15
S
15
S
10
WSW
10
E
5
N
15
S
20
SSE
25
S
20
SSW
20
S
30
SSW
20
SSW
5
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
ononononcross-
on
cross-
on
cross-
on
crosscross-
off
cross-
off
crosscross-
off
crosscross-
on
cross-
on
ononcross-
on
glassoncrosscross-
on
oncross-
on
cross-
on
oncross-
off
glasscross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
glass
High Tide
/ height (m)
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
11:58PM
4.08
12:21PM
3.61
12:36AM
4.09
1:02PM
3.56
1:17AM
4.04
Low Tide
/ height (m)
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
6:29PM
0.42
7:00AM
0.22
7:08PM
0.47
7:41AM
0.24
7:49PM
0.57
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Sunrise4:56--4:58--4:58--5:00--5:01--5:01--5:03--5:03--5:05--5:05--5:07--5:07--
Sunset-9:45--9:45--9:45--9:44--9:43--9:43--9:42--9:40--9:39--9:38--9:37--9:37-
part cloudlight rainmod rainpart cloudcloudrain showersrain showerspart cloudpart cloudpart cloudclearclearpart cloudpart cloudpart cloudclearpart cloudpart cloudclearclearclearclearclearclearclearpart cloudpart cloudpart cloudcloudpart cloudpart cloudrain showerspart cloudpart cloudpart cloudpart cloud
Rain (mm)
-38--12------------------------2----
Temp. °C151414161616151614141614131416181918202019212118212219191919211815171716
Feels °C (?)10881313141111991413101215181817212020202017192120201718181613131516

Short Range Forecast: Moderate rain (total 14mm), heaviest on Fri night. Very mild (max 16°C on Sat morning, min 12°C on Sun night). Mainly fresh winds.

Days 3-6 Weather Summary Mostly dry. Very mild (max 19°C on Wed afternoon, min 12°C on Mon night). Winds decreasing (fresh winds from the NNW on Mon morning, light winds from the NNW by Mon night).

Days 6-9 Weather Summary Mostly dry. Warm (max 22°C on Sat afternoon, min 16°C on Fri night). Wind will be generally light.

Long Range Forecast: Light rain (total 2mm), mostly falling on Mon afternoon. Warm (max 21°C on Mon morning, min 15°C on Mon night). Wind will be generally light.

  • 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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