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Surf Forecasts:

Porth Dinllaen surfForecast / Wales – Lleyn / UK

information circle12 Day Weather and Surf, issued 5 pm Monday 12 Jan 2026 GMT
Forecast update in hr  min  s Forecast update imminent
Porth Dinllaen surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Porth Dinllaen sea temperature is
8.6° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Porth Dinllaen this week:

The surf forecast for Porth Dinllaen over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jan 17) at 12AM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.4m and 16s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Porth Dinllaen in the next 12 days are 1.8m 11s and forecast to arrive on Tuesday (Jan 13) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Wednesday (Jan 14) at 6PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sat 17th Jan)3.5ft (1.1m) 8s
Best Surf12AM (Sat 17th Jan)3.5ft (1.1m) 8s
Most Powerful12AM (Tue 13th Jan)6ft (1.8m) 11s

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

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

Short Range Forecast Moderate rain (total 11mm), heaviest on Tue morning. Very mild (max 10°C on Mon afternoon, min 6°C on Wed night). Winds decreasing (strong winds from the S on Wed night, light winds from the SW by Thu morning).

Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Fri morning. Mild temperatures (max 8°C on Thu afternoon, min 6°C on Sat night). Winds increasing (calm on Thu night, fresh winds from the SSE by Fri morning).

Mon
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2.1
SW
1.8
SW
1.4
SW
0.9
SW
0.6
SW
0.9
SW
1.4
SSW
2.2
SW
1.2
SW
0.8
SW
0.6
SW
1.5
SSW
1.1
SW
1.1
SW
1
SW
0.8
SSW
0.6
SW
0.3
SW
0.3
SW
0.1
SW
0.1
W
Period(s) (?)1111111110105888866888877712
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1112792462163791420530187825418110317314288378823
Wind
(km/h)
40
SW
35
SSW
25
WSW
25
NW
20
WNW
25
SSW
35
S
30
WSW
15
SW
5
SW
15
WSW
30
S
30
S
25
SE
15
E
15
E
20
NE
10
NNE
5
NE
10
ESE
20
ESE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
off		cross-
on		oncross-
on		cross-
off		cross-
off		crosscrosscrosscross-
on		cross-
off		cross-
off		offcross-
off		cross-
off		crosscross-
on		crossoffcross-
off
High Tide
/ height (m)
3:38PM
2.71
4:24AM
2.61
4:51PM
2.67
5:28AM
2.71
5:54PM
2.74
6:22AM
2.87
6:46PM
2.86
7:08AM
3.06
7:28PM
3.01
7:47AM
3.26
8:05PM
3.14
8:22AM
3.45
8:39PM
3.25
8:55AM
3.62
Low Tide
/ height (m)
10:33PM
1.28
11:10AM
1.38
11:50PM
1.29
12:28PM
1.27
12:53AM
1.18
1:23PM
1.09
1:40AM
1.01
2:07PM
0.87
2:20AM
0.82
2:46PM
0.66
2:56AM
0.63
3:23PM
0.47
3:31AM
0.47
Mon
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Sunrise--8:25--8:23--8:23--8:22--8:22--8:21--8:19
Sunset4:25--4:28--4:29--4:30--4:31--4:34--4:36--
rain showers
rain showers
light rain
clear
clear
cloud
cloud
rain showers
part cloud
cloud
part cloud
rain showers
light rain
part cloud
part cloud
cloud
part cloud
cloud
cloud
part cloud
cloud
Rain (mm)
214----4---22--------
Temp. °C10109777798878877877876
Feels °C (?)224011-223550112435631
  • 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 Porth Dinllaen 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 Porth Dinllaen at:
surf-forecast.com

Information about the Porth Dinllaen Surf forecast

The above surf forecast table for Porth Dinllaen provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Porth Dinllaen can be found by selecting the local surf guide option on the grey menu. Our Porth Dinllaen 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 (Porth Dinllaen) 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 Porth Dinllaen 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.

Are you planning a holiday in Lleyn Peninsula? If you are looking for accommodation near Porth Dinllaen, camping, hotels and holiday cottages in Lleyn Peninsula, consider staying in Porthmadog which is 29 km (18 miles) away. Other places in and around Lleyn Peninsula where you can find information about places to rent, and car hire include Anglesey which is 35 km (22 miles) away, Holyhead, Bangor and Llandudno.

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