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Surf Forecasts:

Llandanwg surfForecast / Wales – Mid / UK

information circle12 Day Weather and Surf, issued 5 am Friday 09 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
7.7° C
 (Which is 1.2°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 Friday (Jan 09) at 9PM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.2m and 6s. Another secondary swell of 0.7m and 5s 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 12 days are 2.3m 10s and forecast to arrive on Sunday (Jan 11) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 4s period and expected on Friday (Jan 16) at 9AM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Fri 9th Jan)2ft (0.6m) 11s
Best Surf 6AM (Tue 13th Jan)3.5ft (1.1m) 11s
Most Powerful 9PM (Sun 11th Jan)7.5ft (2.3m) 10s

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 Moderate rain (total 18mm), heaviest on Sun afternoon. Very mild (max 11°C on Sun afternoon, min 2°C on Sat morning). Winds increasing (calm on Fri night, strong winds from the S by Sun afternoon).

Days 3-6 Weather Summary Heavy rain (total 24mm), heaviest during Tue morning. Very mild (max 10°C on Mon morning, min 4°C on Tue night). Winds decreasing (fresh winds from the SSW on Mon morning, calm by Wed morning).

Friday
09
Saturday
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
1
1
0
0
0
0
0
0
0
0
1
0
0
1
1
2
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.6
WSW
0.5
WSW
0.6
WSW
0.6
WSW
0.6
WSW
0.4
SW
1.1
SW
1.2
SW
2.1
SW
2
SW
1.7
WSW
1.3
SW
0.9
WSW
0.8
SW
1.5
WNW
1.5
W
1.2
WSW
1.5
WSW
1.1
WSW
1.2
WSW
0.7
SW
Period(s) (?)111112111010791010111111116659101010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)796611179612312122078480065742921514515117378362231275101
Wind
(km/h)
20
NNW
20
NNW
5
NE
5
E
10
SE
25
SSE
35
SSE
35
SSE
40
SSW
35
SSW
30
SW
15
SSE
15
ENE
30
SSW
20
N
5
ENE
5
SSW
10
ESE
20
WNW
30
W
15
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		glassglasscrosscrosscrosscross-
on		cross-
on		ononcross-
on		cross-
off		cross-
on		cross-
off		glassglasscross-
off		cross-
on		cross-
on		cross-
on
High Tide
/ height (m)
12:01PM
3.91
12:28AM
3.30
12:50PM
3.55
1:22AM
3.07
1:48PM
3.23
2:29AM
2.92
3:00PM
3.02
3:46AM
2.90
4:17PM
2.97
4:54AM
3.02
5:20PM
3.07
5:48AM
3.21
6:10PM
3.24
Low Tide
/ height (m)
7:15PM
0.85
7:12AM
1.14
7:56PM
1.11
7:57AM
1.35
8:42PM
1.33
8:54AM
1.51
9:42PM
1.47
10:16AM
1.58
11:04PM
1.50
11:49AM
1.50
12:19AM
1.40
12:53PM
1.30
1:11AM
1.21
Friday
09
Saturday
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Sunrise8:26--8:25--8:23--8:23--8:22--8:22--8:21--
Sunset-4:20--4:22--4:22--4:24--4:25--4:28--4:30-
light rain
rain showers
clear
clear
part cloud
light rain
light rain
mod rain
rain showers
light rain
rain showers
part cloud
mod rain
light rain
rain showers
clear
part cloud
light rain
light rain
rain showers
rain showers
Rain (mm)
12---126623-1035--1221
Temp. °C4543368111010989106665776
Feels °C (?)-20000-2032324641441002
  • 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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Latest Updates

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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:
surf-forecast.com

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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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