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Surf Forecasts:

Porth Dinllaen surfForecast / Wales – Lleyn / UK

information circle12 Day Weather and Surf, issued 5 pm Sunday 15 Feb 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
7.7° 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 Thursday (Feb 19) at 3PM. The primary swell is predicted to be 1.0m and 14s 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 3.0m 9s and forecast to arrive on Friday (Feb 20) at 6PM. 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 5s period and expected on Wednesday (Feb 18) at 3PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Thu 19th Feb)3.5ft (1.0m) 14s
Best Surf 3PM (Thu 19th Feb)3.5ft (1.0m) 14s
Most Powerful 6PM (Fri 20th Feb)10ft (3.0m) 9s

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 Light rain (total 7mm), mostly falling on Sun afternoon. Mild temperatures (max 9°C on Sun afternoon, min 3°C on Tue night). Winds increasing (light winds from the ENE on Tue afternoon, near gales from the ESE by Wed morning).

Days 3-6 Weather Summary Some drizzle, heaviest during Fri afternoon. Very mild (max 10°C on Fri night, min 3°C on Wed night). Winds decreasing (near gales from the E on Wed night, light winds from the ESE by Thu afternoon).

Sun
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.3
WSW
2
WSW
2.2
W
1.9
W
1.5
NW
0.9
NW
0.6
WSW
0.4
SW
0.4
SW
0.3
SW
0.4
SW
0.7
SW
1
WSW
0.4
SW
2.1
SSW
3
SW
2.3
SW
1.9
SW
1.6
SW
1.8
SW
1.9
SW
Period(s) (?)56766688810101414106887778
Wave
Graph
(?)Metric surfscale
Energy kJ (?)77291414297156604823151727211390283661125724362233296382
Wind
(km/h)
40
W
45
W
40
W
35
WNW
40
NW
15
NNE
15
ENE
20
ESE
45
ESE
50
E
40
E
25
E
10
ESE
35
S
50
S
55
SSW
50
SW
40
SW
45
SW
45
SW
40
SW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
on		cross-
on		cross-
on		oncrosscross-
off		offoffcross-
off		cross-
off		cross-
off		offcross-
off		cross-
off		cross-
off		crosscrosscrosscrosscross
High Tide
/ height (m)
7:50PM
3.09
8:04AM
3.49
8:20PM
3.29
8:34AM
3.74
8:51PM
3.46
9:04AM
3.94
9:23PM
3.60
9:37AM
4.08
9:56PM
3.69
10:11AM
4.12
10:32PM
3.70
10:48AM
4.05
11:10PM
3.63
11:29AM
3.87
Low Tide
/ height (m)
2:34AM
0.57
3:00PM
0.35
3:08AM
0.35
3:35PM
0.12
3:42AM
0.19
4:09PM
-0.03
4:16AM
0.12
4:45PM
-0.08
4:52AM
0.13
5:20PM
-0.02
5:28AM
0.22
5:58PM
0.15
6:07AM
0.39
Sun
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunrise--7:33--7:31--7:30--7:28--7:26--7:24--7:20
Sunset5:28--5:30--5:31--5:34--5:36--5:37--5:39--
thunderstorm
rain showers
part cloud
rain showers
rain showers
part cloud
cloud
part cloud
part cloud
cloud
cloud
clear
clear
part cloud
cloud
light rain
cloud
cloud
cloud
cloud
cloud
Rain (mm)
31-21----------1-----
Temp. °C97786554454565791010101010
Feels °C (?)0-3-30-4-10-2-10-7-9-12-5-5-112222
  • 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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