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Surf Forecasts:

Llandanwg surfForecast / Wales – Mid / UK

information circle12 Day Weather and Surf, issued 5 am Tuesday 10 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
8.3° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Llandanwg this week:

The most powerful waves expected at Llandanwg in the next 12 days are 3.0m 10s and forecast to arrive on Thursday (Mar 12) at 9AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 5s period and expected on Saturday (Mar 14) at 6PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 9AM (Thu 12th Mar)10ft (3.0m) 10s

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

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

Short Range Forecast Heavy rain (total 35mm), heaviest during Thu night. Very mild (max 10°C on Tue night, min 4°C on Thu night). Winds decreasing (near gales from the SSW on Thu morning, moderate winds from the WNW by Thu night).

Days 3-6 Weather Summary Moderate rain (total 17mm), heaviest on Fri afternoon. Mild temperatures (max 9°C on Sun morning, min 4°C on Fri morning). Winds increasing (light winds from the SW on Sat afternoon, strong winds from the WSW by Sun night).

Tuesday
10
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.1
SW
1.5
SW
1.7
SW
1.7
W
1.5
WSW
2
SW
3
WSW
2.2
WSW
1.6
WSW
2.1
WSW
1.9
WSW
1.9
W
1.3
W
1.2
WSW
1.5
SW
1.4
WSW
1.5
WSW
2.4
WSW
2
WSW
1.7
WSW
2
SW
Period(s) (?)67876810109887657768878
Wave
Graph
(?)Metric surfscale
Energy kJ (?)72212362262156441150894245249441933111972222173151709438270532
Wind
(km/h)
30
S
35
S
35
SW
35
W
30
WSW
45
SSW
55
SSW
50
SW
25
WNW
45
WSW
40
WSW
35
W
20
WNW
15
WSW
20
S
25
SW
30
WSW
35
WNW
35
W
30
SW
25
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
on		oncross-
on		ononononcross-
on		oncross-
on		cross-
on		cross-
on		cross-
on		cross-
on		ononcross-
on		cross-
on		oncross-
on
High Tide
/ height (m)
11:58AM
3.29
12:15AM
3.14
12:41PM
2.91
1:09AM
2.83
1:57PM
2.61
3:02AM
2.66
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
Low Tide
/ height (m)
6:19PM
1.42
6:49AM
1.49
7:15PM
1.68
8:15AM
1.73
9:03PM
1.82
10:24AM
1.74
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
Tuesday
10
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Sunrise6:43--6:41--6:39--6:37--6:33--6:31--6:28--
Sunset-6:09--6:12--6:14--6:15--6:16--6:19--6:21-
light rain
light rain
rain showers
clear
part cloud
rain showers
light rain
light rain
rain showers
light rain
thunderstorm
rain showers
rain showers
part cloud
rain showers
rain showers
part cloud
light rain
cloud
cloud
cloud
Rain (mm)
127--144162342-11-4---
Temp. °C881079910107576778998899
Feels °C (?)213-12-1-100-5-2-322241-2023
  • 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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