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Surf Forecasts:

Porth Dinllaen surfForecast / Wales – Lleyn / UK

information circle12 Day Weather and Surf, issued 5 am Tuesday 13 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
8.4° 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 1.9m 7s and forecast to arrive on Thursday (Jan 15) 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 1.6m 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 (Thu 15th Jan)6ft (1.9m) 7s

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. Mild temperatures (max 9°C on Wed night, min 6°C on Tue morning). Winds decreasing (strong winds from the S on Wed night, calm by Thu night).

Days 3-6 Weather Summary Moderate rain (total 10mm), heaviest on Sat night. Mild temperatures (max 8°C on Fri morning, min 6°C on Sat night). Winds decreasing (fresh winds from the SSE on Fri afternoon, light winds from the S by Sun night).

Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.5
WSW
0.9
SW
0.6
SW
0.7
SW
0.1
SW
1.9
SW
1.1
SW
0.8
SW
0.6
SW
0.2
WSW
0.9
SW
1.1
SW
0.8
SW
0.6
SW
0.4
SW
0.3
SW
0.3
SW
0.4
SSW
0.1
W
0.1
W
0.3
SSW
Period(s) (?)111110101478881668888775984
Wave
Graph
(?)Metric surfscale
Energy kJ (?)5331637910083941638041266614510043229810213
Wind
(km/h)
35
WNW
20
NW
15
WNW
20
SSW
35
S
25
SSW
15
SW
5
SE
5
WSW
30
S
35
SSE
25
SE
20
ESE
10
NE
20
NNE
10
ENE
10
SSE
10
SE
10
ESE
15
NE
10
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		ononcross-
off		cross-
off		cross-
off		crossoffcross-
on		cross-
off		cross-
off		offcross-
off		crosscrosscross-
off		cross-
off		offoffcrosscross-
off
High Tide
/ height (m)
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
9:11PM
3.33
Low Tide
/ height (m)
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
3:59PM
0.32
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Sunrise8:25--8:23--8:23--8:22--8:22--8:21--8:19--
Sunset-4:28--4:29--4:30--4:31--4:34--4:36--4:37-
rain showers
clear
clear
cloud
cloud
rain showers
cloud
cloud
rain showers
rain showers
rain showers
part cloud
clear
part cloud
light rain
light rain
cloud
cloud
light rain
light rain
clear
Rain (mm)
3----7--122---42--11-
Temp. °C877779877887787677765
Feels °C (?)0111-1344510-1253345311
  • 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 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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