Porth Dinllaen surfForecast / Wales – Lleyn / UK

information circle12 Day Weather and Surf, issued 11 am Saturday 06 Dec 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
10.7° C
(Which is 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 12 days are 4.0m 12s and forecast to arrive on Tuesday (Dec 09) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Tuesday (Dec 09) at 3AM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful12PM (Tue 9th Dec)13ft (4.0m) 12s

Table - best surf conditions forecast for Porth Dinllaen over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Heavy rain (total 32mm), heaviest during Mon night. Very mild (max 13°C on Sun morning, min 11°C on Sat morning). Winds increasing (light winds from the S on Sat night, strong winds from the SW by Sun night).

Days 3-6 Weather Summary Light rain (total 6mm), mostly falling on Tue morning. Very mild (max 14°C on Tue morning, min 10°C on Wed morning). Winds decreasing (near gales from the S on Tue morning, fresh winds from the WSW by Wed afternoon).

Saturday
06
Sunday
07
Monday
08
Tuesday
09
Wednesday
10
Thursday
11
Friday
12
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
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 (?)
3
WSW
2.5
WSW
1.9
WSW
1.1
SW
1.8
SW
2.1
SW
2.1
SW
2
SW
0.6
WSW
4
SW
3
SW
2.1
SW
2.1
SW
1.9
WSW
1.5
WSW
1.8
SW
1.6
SW
1.5
SSW
1.3
SW
1.7
SW
1.4
SW
Period(s) (?)118101071110111711121212611676788
Wave
Graph
(?)Metric surfscale
Energy kJ (?)19337947112132799289908841933522225613411160288499265239170169320257
Wind
(km/h)
45
WSW
45
WSW
30
SW
35
SE
30
W
40
SSW
30
SW
30
SSW
40
SE
55
SSW
35
SW
40
SW
35
WSW
35
WSW
40
SW
45
S
50
S
40
SSE
45
SSE
45
S
25
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
on
crossoffcross-
on
cross-
off
crosscross-
off
offcross-
off
crosscrosscrosscrosscrosscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
High Tide
/ height (m)
9:21PM
3.85
9:40AM
4.06
10:09PM
3.66
10:28AM
3.95
10:59PM
3.39
11:18AM
3.76
11:51PM
3.10
12:12PM
3.52
12:50AM
2.84
1:12PM
3.27
2:00AM
2.66
2:21PM
3.07
Low Tide
/ height (m)
4:09PM
-0.08
4:29AM
0.20
5:00PM
-0.04
5:16AM
0.35
5:51PM
0.09
6:05AM
0.53
6:44PM
0.28
6:54AM
0.73
7:39PM
0.50
7:47AM
0.93
8:37PM
0.70
8:46AM
1.10
9:38PM
0.85
Saturday
06
Sunday
07
Monday
08
Tuesday
09
Wednesday
10
Thursday
11
Friday
12
Sunrise8:14--8:15--8:15--8:18--8:18--8:19--8:21--
Sunset-4:02--4:01--4:01--4:01--4:00--4:00--4:00-
thunderstorm
light rain
part cloud
light rain
rain showers
thunderstorm
part cloud
light rain
heavy rain
light rain
light rain
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
light rain
rain showers
Rain (mm)
32-522-21651--------34
Temp. °C111111131212111213141211101111111111111210
Feels °C (?)213665564453333212234
  • 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 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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