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Surf Forecasts:

Porth Dinllaen surfForecast / Wales – Lleyn / UK

information circle12 Day Weather and Surf, issued 11 pm Wednesday 28 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
7.9° 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 Saturday (Jan 31) at 9AM. The primary swell is predicted to be 1.2m and 14s period with a secondary swell of 0.3m and 3s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Porth Dinllaen in the next 12 days are 1.8m 18s 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 1.6m 5s period and expected on Friday (Jan 30) at 12AM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Sat 31st Jan)4ft (1.2m) 14s
Best Surf 9AM (Sat 31st Jan)4ft (1.2m) 14s
Most Powerful12PM (Fri 30th Jan)6ft (1.8m) 18s

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 22mm), heaviest during Fri night. Mild temperatures (max 8°C on Fri morning, min 6°C on Wed night). Winds decreasing (near gales from the SE on Thu night, calm by Sat morning).

Days 3-6 Weather Summary Heavy rain (total 22mm), heaviest during Mon morning. Mild temperatures (max 9°C on Tue morning, min 7°C on Sat night). Winds increasing (light winds from the S on Sun afternoon, strong winds from the SE by Tue afternoon).

Thursday
29
Friday
30
Saturday
31
Sunday
01
Monday
02
Tuesday
03
Wed
04
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
1
0
1
0
1
0
1
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.1
SW
1.3
SW
1.1
SW
0.8
SW
1.1
WSW
1.7
SW
1.2
WSW
1.2
WSW
1.2
WSW
1.2
SW
1.1
WSW
0.9
WSW
0.4
SW
0.7
SW
0.4
WSW
0.4
WSW
1
WSW
1.2
SW
1.3
SW
1
SW
1.1
SW
Period(s) (?)1110912191715141714121117914171616969
Wave
Graph
(?)Metric surfscale
Energy kJ (?)298318188161904169763253077153434721174787311150674628175216
Wind
(km/h)
25
SE
35
SE
50
SE
50
SE
40
SSE
30
SE
20
NE
5
SSE
15
SW
20
SSE
10
W
5
S
25
ESE
35
ESE
25
SSW
40
SSE
35
SE
50
SE
40
SSE
45
SE
65
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffoffoffoffoffcrossglasscrosscross-
off		cross-
on		cross-
off		cross-
off		cross-
off		cross-
off		offoffoffoffoffoff
High Tide
/ height (m)
4:50AM
2.95
5:28PM
3.04
6:01AM
3.19
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
Low Tide
/ height (m)
11:35PM
1.02
12:15PM
0.92
12:50AM
0.83
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
Thursday
29
Friday
30
Saturday
31
Sunday
01
Monday
02
Tuesday
03
Wed
04
Sunrise-8:06--8:04--8:03--8:02--8:00--7:58--7:56-
Sunset--4:55--4:58--4:59--5:00--5:02--5:05--5:07
part cloud
clear
cloud
light rain
part cloud
cloud
heavy rain
light rain
part cloud
mod rain
rain showers
cloud
cloud
heavy rain
rain showers
part cloud
part cloud
part cloud
part cloud
light rain
light rain
Rain (mm)
---3--181-61--132----14
Temp. °C777788788888888899887
Feels °C (?)1-4-4-1-1135434520200-2-1-2-7
  • 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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