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Surf Forecasts:

Llandanwg surfForecast / Wales – Mid / UK

information circle12 Day Weather and Surf, issued 11 am Friday 23 Jan 2026 GMT
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
6.6° C
 (Which is 1.8°C colder than average for this time of year)

Best Forecast Surf Conditions for Llandanwg this week:

The surf forecast for Llandanwg over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jan 25) at 6PM. The primary swell is predicted to be 0.9m and 17s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Llandanwg in the next 12 days are 1.6m 12s and forecast to arrive on Friday (Jan 30) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Saturday (Jan 24) at 12AM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Sun 25th Jan)3ft (0.9m) 17s
Best Surf 6PM (Sun 25th Jan)3ft (0.9m) 17s
Most Powerful 6PM (Fri 30th Jan)5ft (1.6m) 12s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Light rain (total 7mm), mostly falling on Sat night. Mild temperatures (max 8°C on Fri afternoon, min 6°C on Fri morning). Winds decreasing (near gales from the ESE on Sat night, light winds from the E by Sun night).

Days 3-6 Weather Summary Heavy rain (total 40mm), heaviest during Mon night. Mild temperatures (max 8°C on Wed night, min 3°C on Tue morning). Winds decreasing (strong winds from the E on Tue night, calm by Wed afternoon).

Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
2
0
0
1
1
0
0
0
1
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.4
WSW
0.4
WSW
0.9
WSW
0.6
WSW
0.5
WSW
0.7
WSW
0.9
WSW
0.3
WSW
0.8
WSW
0.6
WSW
0.4
WSW
0.7
SW
0.8
WSW
0.4
WSW
0.4
WSW
0.7
WSW
0.7
SW
0.4
WSW
0.4
WSW
0.5
WSW
0.7
SW
Period(s) (?)1017161715159181612118101616111017151413
Wave
Graph
(?)Metric surfscale
Energy kJ (?)3611739222913320712960273101456912280871051089778104167
Wind
(km/h)
35
E
35
ESE
50
ESE
40
ESE
40
ESE
40
SE
30
ESE
20
ENE
15
ESE
25
SE
30
SE
10
NE
10
ENE
30
E
45
E
35
E
10
NE
20
S
30
SSE
35
SSW
35
SW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crosscross-
off		cross-
off		cross-
off		cross-
off		crossoffcross-
off		cross-
off		cross-
off		cross-
off		offcross-
on		cross-
on		cross-
on		on
High Tide
/ height (m)
10:44AM
4.41
11:06PM
3.92
11:26AM
4.26
11:51PM
3.76
12:12PM
4.02
12:41AM
3.56
1:07PM
3.73
1:43AM
3.36
2:17PM
3.47
3:00AM
3.25
3:39PM
3.36
4:21AM
3.36
4:58PM
3.47
Low Tide
/ height (m)
5:55PM
0.53
5:50AM
0.77
6:31PM
0.69
6:24AM
0.94
7:12PM
0.89
7:08AM
1.13
8:06PM
1.10
8:19AM
1.30
9:26PM
1.27
10:09AM
1.35
11:07PM
1.26
11:51AM
1.16
12:28AM
1.06
Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
Sunrise8:12--8:11--8:10--8:08--8:07--8:06--8:03--
Sunset-4:43--4:45--4:46--4:49--4:51--4:52--4:53-
light rain
part cloud
cloud
cloud
cloud
rain showers
cloud
cloud
light rain
part cloud
light rain
rain showers
part cloud
cloud
mod rain
light rain
light rain
rain showers
part cloud
light rain
mod rain
Rain (mm)
1----5--1-222--6217-49
Temp. °C787787676776675668987
Feels °C (?)-10-3-2-12-122-10210-3-23-221-1
  • 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Llandanwg 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.

View detailed surf forecast for Llandanwg at:
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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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