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Surf Forecasts:

Porth Dinllaen surfForecast / Wales – Lleyn / UK

information circle12 Day Weather and Surf, issued 11 pm Thursday 20 Nov 2025 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
12.6° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Porth Dinllaen this week:

The most powerful waves expected at Porth Dinllaen in the next 12 days are 3.5m 10s and forecast to arrive on Sunday (Nov 23) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Saturday (Nov 22) at 12AM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful12PM (Sun 23rd Nov)11ft (3.5m) 10s

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 Heavy rain (total 21mm), heaviest during Fri night. Very mild (max 12°C on Sat night, min 7°C on Thu night). Winds increasing (calm on Fri morning, gales from the WSW by Sun afternoon).

Days 3-6 Weather Summary Light rain (total 8mm), mostly falling on Sun night. Mild temperatures (max 9°C on Sun night, min 7°C on Wed morning). Winds decreasing (near gales from the N on Sun night, calm by Tue night).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thu
27
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
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 (?)
0.6
NW
0.2
WNW
0.5
WSW
1.8
SW
1.1
SW
0.7
SW
0.1
W
3
WSW
3
W
1
WSW
0.5
SW
0.2
WSW
0.1
W
0.9
NNW
0.7
NNW
0.2
WNW
0.1
W
0.7
WSW
1.8
WSW
1.6
WSW
1.4
WSW
Period(s) (?)6436771389108811664113677
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2515010244310301603192357353353210254256197
Wind
(km/h)
20
NNE
0
S
30
SW
45
SSW
25
NW
20
SW
45
SSW
50
W
60
WSW
45
NW
50
N
50
N
40
N
30
NNE
30
N
15
NE
10
S
25
SW
35
SW
35
SW
40
SW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crossglasscrosscross-
off		oncrosscross-
off		cross-
on		crossoncross-
on		cross-
on		cross-
on		cross-
on		cross-
on		crosscross-
off		crosscrosscrosscross
High Tide
/ height (m)
8:48AM
3.59
9:06PM
3.44
9:20AM
3.57
9:39PM
3.34
9:53AM
3.50
10:12PM
3.20
10:28AM
3.40
10:47PM
3.04
11:05AM
3.27
11:26PM
2.87
11:48AM
3.14
12:14AM
2.71
12:39PM
3.02
Low Tide
/ height (m)
3:25AM
0.55
3:47PM
0.48
3:59AM
0.62
4:23PM
0.54
4:34AM
0.71
5:01PM
0.64
5:11AM
0.82
5:43PM
0.77
5:52AM
0.94
6:29PM
0.89
6:36AM
1.05
7:19PM
0.98
7:26AM
1.16
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thu
27
Sunrise-7:50--7:52--7:54--7:56--7:58--7:58--8:00-
Sunset--4:15--4:14--4:13--4:12--4:10--4:09--4:08
clear
part cloud
cloud
rain showers
clear
cloud
rain showers
part cloud
cloud
mod rain
part cloud
cloud
rain showers
clear
clear
clear
cloud
cloud
cloud
cloud
cloud
Rain (mm)
---12--9--7--1--------
Temp. °C7781010101299999999899111211
Feels °C (?)0513454-2-4-1-2-2022452453
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Latest Updates

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Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.

Feel that? If you are in the northern hemisphere, you will have had that first bite of winter. The lick of a frost, the chill of a cold offshore breeze and the sound of winter swells pounding the shores. If you are near the mountains, your favourite jackets, gloves, and footwear might get dusted off and prepped for battle. And in that beautiful Venn diagram, you will find PrimaLoft. They have spent over 40 years developing innovative insulations that have powered your warmest winter gear. In t

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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:
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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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