Llandanwg surfForecast / Wales – Mid / UK

information circle12 Day Weather and Surf, issued 12 am Thursday 03 Jul 2025 BST
Forecast update in hr  min  s Forecast update imminent
Llandanwg surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Llandanwg sea temperature is
17.2° C
(Which is 3.0°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Llandanwg this week:

The most powerful waves expected at Llandanwg in the next 12 days are 1.5m 7s 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 1.3m 6s period and expected on Monday (Jul 07) at 1PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 1AM (Sat 5th Jul)5ft (1.5m) 7s

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

Updates in  hr  min  s Forecast update imminent
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Mon
14
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
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 (?)
0.2
WSW
0.4
SW
0.4
SW
0.7
WSW
0.6
SW
1.3
SW
1.5
WSW
1
WSW
0.9
WSW
1.1
W
1.3
W
0.8
W
1.1
NW
1.3
NW
1.1
NW
0.3
NW
0.4
NW
0.4
NW
0.1
W
0.4
SW
0.2
WSW
0.1
SW
0.2
WSW
0.4
SW
0.4
SW
0.2
WSW
0.1
SW
0.1
SW
0.1
W
0.1
W
0.1
W
0.1
W
0.1
W
0.1
W
0.4
SW
Period(s) (?)95543677745556544474443-4554477751062
Wave
Graph
(?)Metric surfscale
Energy (?)1310817109720593764794336813364478352110462112211311
Wind
(km/h)
0
NNE
10
WSW
15
SW
10
W
25
SW
30
SW
30
SW
15
SW
20
SW
25
WNW
25
WNW
25
WNW
35
NW
30
NNW
30
NNW
15
NNW
10
NW
10
WNW
5
S
10
SSW
5
SW
10
SSE
5
WSW
10
WSW
15
S
15
SSW
15
SSW
20
SSW
20
SSW
20
SSW
20
SSW
20
SSW
10
SSW
5
SSE
10
SW
10
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glasscross-
on
oncross-
on
onononononcross-
on
crosscrosscrosscross-
off
cross-
off
cross-
off
crosscross-
on
cross-
on
cross-
on
oncross-
on
ononcross-
on
cross-
on
ononononcross-
on
cross-
on
cross-
on
glassonon
High Tide
/ height (m)
2:20AM
3.40
2:58PM
2.98
3:23AM
3.19
4:07PM
2.94
4:32AM
3.09
5:13PM
3.00
5:36AM
3.11
6:08PM
3.14
6:30AM
3.21
6:55PM
3.33
7:16AM
3.36
7:37PM
3.54
7:56AM
3.52
8:16PM
3.75
8:34AM
3.68
8:53PM
3.96
9:11AM
3.81
9:30PM
4.15
9:49AM
3.91
10:08PM
4.30
10:27AM
3.96
10:47PM
4.39
11:07AM
3.96
Low Tide
/ height (m)
9:23AM
1.14
9:26PM
1.37
10:09AM
1.28
10:22PM
1.46
11:04AM
1.35
11:31PM
1.47
12:10PM
1.36
12:46AM
1.39
1:16PM
1.28
1:50AM
1.23
2:11PM
1.14
2:41AM
1.04
2:57PM
0.98
3:26AM
0.85
3:39PM
0.82
4:08AM
0.69
4:19PM
0.69
4:49AM
0.56
4:57PM
0.62
5:29AM
0.48
5:34PM
0.60
6:08AM
0.45
6:12PM
0.64
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Mon
14
Sunrise-4:56--4:56--4:58--4:58--5:00--5:01--5:01--5:03--5:03--5:05--5:07--5:07-
Sunset--9:43--9:43--9:42--9:42--9:40--9:39--9:39--9:38--9:37--9:37--9:36--9:35
clearclearclearpart cloudpart cloudlight rainheavy rainlight raincloudlight rainrain showerspart cloudrain showerspart cloudclearclearclearclearpart cloudpart cloudcloudpart cloudcloudpart cloudpart cloudcloudcloudcloudcloudpart cloudpart cloudcloudcloudclearpart cloudcloud
Rain (mm)
-----2141-22-1-----------------------
Temp. °C141414141515151616161516141516141616141617151717161616161717171819171919
Feels °C (?)1313111211111214141210119910111414131516151716151514151416151820182019

Short Range Forecast: Moderate rain (total 17mm), heaviest on Fri night. Very mild (max 16°C on Sat morning, min 12°C on Wed night). Winds increasing (calm on Wed night, fresh winds from the SW by Fri night).

Days 3-6 Weather Summary Light rain (total 5mm), mostly falling on Sat night. Very mild (max 16°C on Sat night, min 12°C on Sun night). Winds decreasing (fresh winds from the NW on Sun night, light winds from the W by Tue afternoon).

Days 6-9 Weather Summary Mostly dry. Very mild (max 17°C on Wed afternoon, min 13°C on Tue night). Wind will be generally light.

Long Range Forecast: Mostly dry. Very mild (max 19°C on Sun afternoon, min 15°C on Fri 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 Llandanwg Surf forecast

The above surf forecast table for Llandanwg provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Llandanwg can be found by selecting the local surf guide option on the grey menu. Our Llandanwg 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 (Llandanwg) 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 Llandanwg 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.

Llandanwg is 10 km (6 miles) from Porthmadog. If you plan a holiday in Mid Wales, look for hotels and other accommodation in Porthmadog. Porthmadog has rooms for a wide range of budgets as well as car hire and transport links.

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