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Surf Forecasts:

Porth Dinllaen surfForecast / Wales – Lleyn / UK

information circle12 Day Weather and Surf, issued 5 am Friday 30 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
7.6° C
 (Which is slightly cooler than normal)

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 Friday (Jan 30) at 3PM. The primary swell is predicted to be 1.9m and 17s period. 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 2.0m 17s and forecast to arrive on Friday (Jan 30) at 12PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Wednesday (Feb 04) at 12PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Fri 30th Jan)6ft (1.9m) 17s
Best Surf 3PM (Fri 30th Jan)6ft (1.9m) 17s
Most Powerful12PM (Fri 30th Jan)6.5ft (2.0m) 17s

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 18mm), heaviest on Fri night. Mild temperatures (max 9°C on Sun night, min 7°C on Fri morning). Winds decreasing (fresh winds from the SE on Fri morning, light winds from the SSW by Sun afternoon).

Days 3-6 Weather Summary Moderate rain (total 11mm), heaviest on Mon afternoon. Mild temperatures (max 9°C on Mon morning, min 7°C on Wed morning). Winds decreasing (near gales from the ESE on Mon afternoon, light winds from the SE by Tue morning).

Friday
30
Saturday
31
Sunday
01
Monday
02
Tuesday
03
Wednesday
04
Thursday
05
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
2
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.1
WSW
1.9
SW
1.2
WSW
1.2
WSW
1.7
WSW
0.9
WSW
0.8
SW
0.7
SW
0.6
SW
0.4
SW
0.3
SW
0.3
SW
0.2
WSW
0.4
WSW
0.6
WSW
0.6
WSW
1.6
SSW
1.3
SW
1.2
SW
1.1
SW
0.7
SW
Period(s) (?)191716161614121099881716161468999
Wave
Graph
(?)Metric surfscale
Energy kJ (?)913186964964115033672009447271092910716615818818324119678
Wind
(km/h)
30
SE
20
ESE
25
ENE
15
NNW
30
WNW
15
S
15
W
5
SSW
15
E
35
ESE
50
ESE
50
ESE
25
S
20
SSE
30
SE
30
SE
35
SE
35
ESE
20
ESE
15
SE
25
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffcross-
off		cross-
on		cross-
on		cross-
off		cross-
on		cross-
off		cross-
off		offoffoffcross-
off		offoffoffoffoffoffoffoff
High Tide
/ height (m)
6:35PM
3.21
7:00AM
3.49
7:30PM
3.40
7:50AM
3.78
8:19PM
3.55
8:36AM
4.01
9:02PM
3.63
9:19AM
4.15
9:43PM
3.64
9:59AM
4.16
10:22PM
3.58
10:39AM
4.05
11:01PM
3.47
Low Tide
/ height (m)
1:23PM
0.59
1:48AM
0.57
2:19PM
0.25
2:37AM
0.33
3:07PM
-0.03
3:21AM
0.15
3:51PM
-0.19
4:01AM
0.06
4:32PM
-0.23
4:39AM
0.06
5:10PM
-0.14
5:16AM
0.17
5:47PM
0.06
Friday
30
Saturday
31
Sunday
01
Monday
02
Tuesday
03
Wednesday
04
Thursday
05
Sunrise8:04--8:03--8:02--8:00--7:58--7:56--7:54--
Sunset-4:58--4:59--5:00--5:02--5:05--5:07--5:08-
part cloud
cloud
heavy rain
light rain
rain showers
part cloud
cloud
cloud
cloud
light rain
light rain
light rain
cloud
cloud
part cloud
cloud
light rain
light rain
cloud
part cloud
light rain
Rain (mm)
--1521----132----23--3
Temp. °C8888888899989989888910
Feels °C (?)1333244632-1-445210-1353
  • 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:
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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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