Snow-ForecastSnow-ForecastMountain-ForecastMountain-ForecastTide-ForecastTide-ForecastWeather-ForecastWeather-Forecast
Search by country, region, or break
Search by country, region, or break

Quick Links

Surf Forecasts:

Porth Dinllaen surfForecast / Wales – Lleyn / UK

information circle12 Day Weather and Surf, issued 6 am Wednesday 17 Sep 2025 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
16.6° C
 (Which is 1.3°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 12 days are 2.3m 8s and forecast to arrive on Wednesday (Sep 17) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Thursday (Sep 18) at 10AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 1PM (Wed 17th Sep)7.5ft (2.3m) 8s

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 23mm), heaviest during Fri night. Very mild (max 18°C on Fri afternoon, min 14°C on Wed night). Winds decreasing (strong winds from the SW on Wed morning, light winds from the N by Fri night).

Days 3-6 Weather Summary Heavy rain (total 29mm), heaviest during Sat morning. Very mild (max 16°C on Sat morning, min 9°C on Sat night). Winds decreasing (severe gales from the NW on Sat night, light winds from the NNE by Sun night).

Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
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
See all maps
Wave Height (m) & direction (?)
2.5
SW
2.2
SW
1.6
SW
1.5
SW
2.1
SW
1.9
SW
1.8
SW
1.5
SW
0.9
SW
0.5
SW
0.4
SW
0.3
SW
0.1
W
0.9
NNW
0.7
NNW
0.6
NNW
0.7
NW
0.7
NW
0.8
NW
0.6
NW
0.1
W
Period(s) (?)88757776698814565454412
Wave
Graph
(?)Metric surfscale
Energy kJ (?)79456423704283442920443725114423016162219133
Wind
(km/h)
45
SW
40
SW
30
SW
35
SSW
40
SSW
35
SSW
35
S
35
SSW
5
N
35
SSE
40
SSW
60
NNW
45
N
30
NNE
20
NNE
25
N
30
NNW
30
NNW
30
NNW
20
N
10
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscrosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
on		cross-
off		cross-
off		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
off
High Tide
/ height (m)
6:23PM
2.98
7:10AM
2.86
7:22PM
3.26
7:55AM
3.08
8:05PM
3.53
8:31AM
3.29
8:42PM
3.74
9:05AM
3.46
9:17PM
3.88
9:37AM
3.59
9:50PM
3.94
10:09AM
3.66
10:23PM
3.90
Low Tide
/ height (m)
12:57PM
1.08
1:37AM
0.67
1:57PM
0.80
2:29AM
0.39
2:43PM
0.54
3:12AM
0.17
3:23PM
0.35
3:49AM
0.05
3:58PM
0.23
4:22AM
0.01
4:30PM
0.19
4:52AM
0.07
5:00PM
0.22
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Sunrise6:54--6:56--6:56--6:58--7:01--7:01--7:03--
Sunset-7:30--7:27--7:24--7:22--7:20--7:17--7:15-
cloud
clear
rain showers
light rain
cloud
light rain
light rain
cloud
heavy rain
rain showers
light rain
heavy rain
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
clear
Rain (mm)
--22-12-1616112---------
Temp. °C171615161717171815161410111212121313131515
Feels °C (?)10109111212131315107-624666881312
  • 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

Eyeball surf reportRecent Eyeball Surf Reports for Wales - Lleyn

  1. weather stationWind Update Still cross-shore at Porth Dinllaen (gales from the SW at Aberdaron 21 km from Porth Dinllaen). A 2.4m swell from the SW

    2 hours 1 minute ago Porth Dinllaen
Expand
<
>
View all

21 km away, 2 h 1 min ago

63 km/h
SW
0.0
16.6
Air / Water (°C)
Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

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:
surf-forecast.com

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.

Nearest
Nearest
Nearest