Porth Dinllaen Surf Break

Lat Long: 52.94° N 4.56° W

Porth Dinllaen Surf Forecast and Surf Report

Issued: 6 pm 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Porth Dinllaen sea temperature is
18.5°C
2.7° 

Porth Dinllaen surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Porth Dinllaen surf forecast from 30 Aug 2026:

  • Most powerful swell: Wednesday 2 Sep, 10PM (local time) - 6ft (1.9m), 7s period, SW swell with 344 kJ wave energy.

Best Forecast Surf Conditions for Porth Dinllaen this week:

The most powerful waves expected at Porth Dinllaen in the next 16 days are 1.9m 7s and forecast to arrive on Wednesday (Sep 02) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Wednesday (Sep 02) at 7AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful10PM (Wed 2nd Sep)6ft (1.9m) 7s

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


Short Range Forecast

Moderate rain (total 17mm), heaviest on Sun afternoon. Very mild (max 18°C on Wed morning, min 15°C on Sun night). Mainly fresh winds.

Days 5-7 Weather Summary

Moderate rain (total 10mm), heaviest on Thu night. Very mild (max 18°C on Thu night, min 13°C on Fri night). Winds decreasing (near gales from the SW on Thu night, moderate winds from the WNW by Sat morning).

Sun
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
SSW
5
0.9
SW
8
0.8
SW
8
0.7
SW
8
0.5
WSW
8
0.6
SW
4
1.1
SW
5
1.1
SW
5
1.7
SW
6
1.6
SW
6
1.9
SW
7
1.5
WSW
5
1.3
SW
5
1.6
SW
6
1.5
WSW
7
1.5
WSW
6
1.2
WNW
5
0.9
NW
5
0.5
SW
6
0.4
SW
4
Wave Graph
Metric surfscale
Energy kJ
0
99
80
72
32
12
0
68
219
177
335
125
84
190
222
143
69
36
16
7
Wind (km/h)
30
S
10
WSW
35
WNW
25
WNW
15
WSW
25
SW
30
SW
25
SW
35
SSW
35
SSW
30
SW
30
WSW
25
SW
55
SW
40
WSW
35
WSW
40
WNW
25
NW
15
WSW
10
SW
Wind State
cross-off
cross
on
on
cross
cross
cross
cross
cross-off
cross-off
cross
cross
cross
cross
cross-on
cross-on
on
on
cross-on
cross
High Tide
10:50PM4.01m
11:09AM3.66m
11:25PM3.96m
11:44AM3.62m
00:03AM3.82m
12:24PM3.50m
00:46AM3.58m
1:09PM3.29m
1:36AM3.27m
2:05PM3.04m
2:42AM2.95m
3:20PM2.84m
Low Tide
5:30PM0.20m
5:58AM0.09m
6:06PM0.28m
6:33AM0.23m
6:43PM0.42m
7:12AM0.45m
7:25PM0.63m
7:56AM0.73m
8:16PM0.86m
8:52AM1.01m
9:25PM1.07m
10:10AM1.21m
10:59PM1.14m
thunderstorm
rain showers
cloud
cloud
part cloud
clear
light rain
mod rain
rain showers
part cloud
part cloud
cloud
light rain
mod rain
part cloud
rain showers
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:24
6:26
6:28
6:30
6:31
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:12
8:09
8:07
8:05
8:02
8:00
7:58
 mm
4
2
1
7
3
2
7
1
Temp °C
16
16
15
16
16
16
16
16
18
17
17
16
17
18
15
18
15
13
15
16
Feels °C
11
14
9
13
13
12
11
12
14
13
13
12
13
10
8
12
8
8
12
14
  • 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
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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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