Llandanwg surfForecast / Wales – Mid / UK

information circle12 Day Weather and Surf, issued 6 pm Saturday 05 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
17.4° 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 0.8m 7s and forecast to arrive on Sunday (Jul 06) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Monday (Jul 07) at 4AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 1AM (Sun 6th Jul)2.5ft (0.8m) 7s

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

Updates in  hr  min  s Forecast update imminent
Sat
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thu
17
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 (?)
1.1
SW
0.8
WSW
0.6
WSW
0.6
WSW
0.4
SW
0.2
WSW
0.8
NW
0.6
NW
0.5
NW
0.3
WNW
0.1
W
0.1
SW
0.1
SW
0.1
W
0.1
W
0.1
W
0.1
W
0.1
W
0.2
WSW
0.2
WSW
0.3
SW
0.6
WSW
0.8
WSW
0.7
SW
0.7
SW
0.6
WSW
0.4
WSW
0.6
WSW
0.4
SW
Period(s) (?)77766743447447-6------9111188251111109955
Wave
Graph
(?)Metric surfscale
Energy (?)11996615012524101162111010000002346612715120710055312214
Wind
(km/h)
25
SW
15
SSW
20
NW
20
NW
25
NNW
20
NNW
25
NW
20
NW
10
NW
10
W
5
S
5
WNW
10
W
5
ENE
0
W
5
WNW
10
E
5
SSE
0
W
10
E
10
SE
10
SSW
5
SE
5
SSW
5
WNW
15
ENE
10
ENE
20
E
10
S
15
NW
10
WNW
10
SE
10
SSW
10
W
10
E
10
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on
crosscrosscross-
off
cross-
off
crosscrosscrosscross-
on
cross-
on
glasscross-
on
glassglasscross-
on
cross-
off
glassglasscross-
off
cross-
off
cross-
on
glassglassglassoffcross-
off
cross-
off
cross-
on
crosscrosscrossoncross-
on
cross-
off
cross
High Tide
/ height (m)
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
11:27PM
4.40
11:50AM
3.89
12:10AM
4.32
12:35PM
3.78
12:57AM
4.16
Low Tide
/ height (m)
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
6:49AM
0.48
6:49PM
0.73
7:30AM
0.56
7:30PM
0.85
8:14AM
0.69
Sat
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thu
17
Sunrise--4:58--5:00--5:01--5:01--5:03--5:03--5:05--5:07--5:07--5:09--5:09--5:11
Sunset9:42--9:42--9:40--9:39--9:39--9:38--9:37--9:37--9:36--9:35--9:34--9:32--
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Rain (mm)
-31------------------1--2--2--------
Temp. °C161615161415171515161418181721211924252326272021222222191917191618181619
Feels °C (?)131511121010151213141318181821212024262324262122232222171916171517171619

Short Range Forecast: Light rain (total 4mm), mostly falling on Sat night. Very mild (max 17°C on Mon afternoon, min 12°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 24°C on Fri morning, min 14°C on Tue night). Wind will be generally light.

Days 6-9 Weather Summary Light rain (total 3mm), mostly falling on Sat afternoon. Warm (max 27°C on Sat afternoon, min 18°C on Sat night). Wind will be generally light.

Long Range Forecast: Light rain (total 2mm), mostly falling on Mon afternoon. Very mild (max 19°C on Mon afternoon, min 15°C on Tue 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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