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Surf Forecasts:

Llandanwg surfForecast / Wales – Mid / UK

information circle16 Day Weather and Surf, issued 5 pm Friday 13 Mar 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
8.4° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Llandanwg this week:

The surf forecast for Llandanwg over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Mar 14) at 12AM. The primary swell is predicted to be 0.9m and 10s period with a secondary swell of 0.2m and 5s. Another secondary swell of 0.6m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Llandanwg in the next 16 days are 1.9m 8s and forecast to arrive on Monday (Mar 16) at 6PM. 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 4s period and expected on Saturday (Mar 14) at 12PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sat 14th Mar)3ft (0.9m) 10s
Best Surf12AM (Sat 14th Mar)3ft (0.9m) 10s
Most Powerful 6PM (Mon 16th Mar)6ft (1.9m) 8s

Table - best surf conditions forecast for Llandanwg over the next 16 days.

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

Short Range Forecast Moderate rain (total 14mm), heaviest on Sun night. Mild temperatures (max 9°C on Sun morning, min 4°C on Sun night). Winds increasing (calm on Sat morning, fresh winds from the W by Sun afternoon).

Days 3-6 Weather Summary Light rain (total 6mm), mostly falling on Mon afternoon. Very mild (max 15°C on Wed afternoon, min 8°C on Mon afternoon). Winds decreasing (fresh winds from the S on Tue morning, calm by Wed morning).

Fri
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
1
1
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.8
WSW
0.9
WSW
0.7
WSW
0.6
WSW
0.4
SW
1.1
SW
1.4
WSW
1.7
W
1.7
WSW
1.7
WSW
1.6
SW
1.5
SW
1.6
SW
1.2
SW
0.7
SW
0.6
WSW
0.4
SW
0.3
WSW
0.2
WSW
0.2
WSW
0.1
W
Period(s) (?)7109985576688891111998815
Wave
Graph
(?)Metric surfscale
Energy kJ (?)29814271501759106274219229299264346242119792215764
Wind
(km/h)
30
WSW
15
NNW
5
WNW
15
WSW
10
WSW
30
SSW
35
W
30
W
35
WSW
30
SW
25
S
30
S
35
S
20
S
10
E
5
E
10
ENE
10
E
5
ESE
10
E
10
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
off		glassononcross-
on		cross-
on		cross-
on		ononcross-
on		cross-
on		cross-
on		cross-
on		cross-
off		glasscross-
off		cross-
off		cross-
off		cross-
off		cross-
off
High Tide
/ height (m)
4:14PM
2.60
4:54AM
2.86
5:27PM
2.86
5:46AM
3.22
6:08PM
3.19
6:23AM
3.62
6:43PM
3.55
6:57AM
4.02
7:17PM
3.91
7:31AM
4.39
7:51PM
4.22
8:06AM
4.69
8:26PM
4.47
8:43AM
4.87
Low Tide
/ height (m)
11:05PM
1.69
11:57AM
1.47
12:14AM
1.38
12:48PM
1.10
12:59AM
1.03
1:28PM
0.72
1:37AM
0.71
2:04PM
0.39
2:12AM
0.45
2:38PM
0.14
2:47AM
0.26
3:13PM
0.00
3:21AM
0.16
Fri
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Sunrise--6:33--6:31--6:28--6:26--6:24--6:22--6:20
Sunset6:15--6:16--6:19--6:21--6:22--6:24--6:27--
rain showers
rain showers
clear
part cloud
light rain
light rain
light rain
rain showers
part cloud
light rain
light rain
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
Rain (mm)
22--1225-51----------
Temp. °C767769858891111101415121314912
Feels °C (?)-1232230-321344513149101159
  • 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 16 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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