Porth Dinllaen surfForecast / Wales – Lleyn / UK

information circle16 Day Weather and Surf, issued 12 am Wednesday 22 Apr 2026 BST
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
10.3° C
(Which is 1.4°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Porth Dinllaen this week:

The most powerful waves expected at Porth Dinllaen in the next 16 days are 0.7m 11s and forecast to arrive on Friday (Apr 24) at 4PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Wednesday (Apr 22) at 4AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 4PM (Fri 24th Apr)2.5ft (0.7m) 11s

Table - best surf conditions forecast for Porth Dinllaen over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Very mild (max 16°C on Thu afternoon, min 7°C on Tue night). Winds decreasing (fresh winds from the E on Tue night, calm by Fri morning).

Days 3-6 Weather Summary Mostly dry. Very mild (max 16°C on Mon afternoon, min 12°C on Fri night). Wind will be generally light.

Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Tue
28
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
Wave Height (m) & direction (?)
0.6
E
0.1
W
0.1
W
0.2
ESE
0.1
SW
0.4
SW
0.5
SW
0.6
SW
0.7
SW
0.6
SW
0.6
SW
0.6
WSW
0.5
SW
0.4
SW
0.4
SW
0.4
SW
0.3
SW
0.3
SW
0.2
WSW
0.2
WSW
0.1
W
Period(s) (?)38162111110111111111010998887815
Wave
Graph
(?)Metric surfscale
Energy kJ (?)01505294510112194947347212017109564
Wind
(km/h)
30
E
25
E
25
ESE
15
E
15
E
10
E
10
ESE
5
ESE
10
NW
5
SE
5
S
5
NW
0
E
5
S
10
W
0
NNW
5
NNE
15
N
10
ESE
5
ESE
5
NNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
glassonglassglassglassglasscross-
off
cross-
on
glassglasscross-
on
cross-
off
offcross-
on
High Tide
/ height (m)
12:16AM
3.69
12:48PM
3.34
1:10AM
3.40
1:50PM
2.95
2:17AM
3.13
3:13PM
2.66
3:45AM
2.98
4:57PM
2.61
5:17AM
3.03
6:15PM
2.76
6:23AM
3.19
7:05PM
2.96
7:12AM
3.36
Low Tide
/ height (m)
7:39AM
0.43
8:03PM
0.83
8:43AM
0.66
9:09PM
1.06
9:59AM
0.81
10:25PM
1.17
11:20AM
0.80
11:45PM
1.12
12:34PM
0.66
12:54AM
0.94
1:33PM
0.48
1:49AM
0.73
2:20PM
0.34
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Tue
28
Sunrise-6:05--6:03--6:01--5:58--5:56--5:54--5:52-
Sunset--8:29--8:30--8:31--8:34--8:36--8:37--8:39
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
cloud
cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
Rain (mm)
---------------------
Temp. °C91214111316151414141213131313131416171516
Feels °C (?)16861013121211121011111110111113141413
  • 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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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 16 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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