Porth Ceriad Surf Break

Lat Long: 52.79° N 4.51° W

Porth Ceriad Surf Forecast and Surf Report

Issued: 12 am 08 Sep 2026 (local time)

Forecast update in  hr  min

Today's Porth Ceriad sea temperature is
17.9°C
2.2° 

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


Porth Ceriad surf forecast from 8 Sep 2026:

  • Best quality surf: Sunday 13 Sep, 7AM (local time) - 4ft (1.2m), 7s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Saturday 12 Sep, 10PM (local time) - 6ft (1.9m), 6s period, SW swell with 302 kJ wave energy.
  • Next surfable swell (1★+): Friday 11 Sep, 7PM (local time) - 2ft (0.6m), 8s period with WSW swell.

Best Forecast Surf Conditions for Porth Ceriad this week:

The surf forecast for Porth Ceriad over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 11) at 7PM. The primary swell is predicted to be 0.6m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Porth Ceriad in the next 16 days are 1.9m 6s and forecast to arrive on Saturday (Sep 12) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Wednesday (Sep 09) at 1AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Fri 11th Sep)2ft (0.6m) 8s
Best Surf 7AM (Sun 13th Sep)4ft (1.2m) 7s
Most Powerful10PM (Sat 12th Sep)6ft (1.9m) 6s

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


The Lowdown

Alright, grab a coffee and listen up. I’m Rusty.

We’re looking at a pretty lean run ahead at Porth Ceriad. Honestly, for the next week and a half there’s nothing that’s really gonna get the heart pumping. The pattern for the first several days is mostly small, weak swells with a lot of wind problems. There’s a big gap here with over a week of poor to very ordinary conditions before we see a little flicker. So if you’ve got the itch, you might have to sit on your hands for a while.

Starting Tuesday the 8th, there’s swell – about 4 ft from the west – but that 30 km/h WNW wind being cross-off isn’t saving this one. The wave energy is weak, only 102 (that’s just barely in the moderate bracket), and the period is short at 5 seconds, just a sloppy windswell. The call is poor, and I’m not recommending it. It stays like that through Wednesday and Thursday with wind getting worse, strong cross-onshore and messy conditions on Thursday hitting 123 for energy, but the period is a pathetic 4 seconds. No go.

Friday the 11th is cleaner but tiny – 2 ft and dropping. The whole weekend is poor. A little blip shows up on Sunday the 13th: 3 ft swell from the SW, and for a moment the wind goes glassy in the morning – that’s a rare treat for a spot that often gets chopped up. The energy is a weak 93, but that glassy surface and fairly consistent break would offer some clean if small surf. It’s a beginner-friendly 3 ft. I’d say if you’re desperate, Sunday morning is your best bet in this whole run, but don’t expect any power.

The following week is dead. Monday and Tuesday tiny with onshore winds. Not until Thursday the 17th afternoon do we see anything: a clean 2 ft swell with NW wind offshore at 25 km/h. The energy is only 50, so again, small clean waves for a quiet session. That’s probably the second best slot – for beginners or anyone wanting an easy paddle.

After that, we fade into nearly nothing through the 23rd. There are long-period swells (up to 17 seconds) appearing around the 21st and 22nd, but the height is 0.3 ft – literally flat. With that kind of period it’d break straight and suck at a beach setup like this, but it’s academic because there’s nothing to ride.

Crowds at Porth Ceriad can be an issue “often,” but with this stretch of poor to tiny surf, you’ll likely have the place to yourself.

Honest truth: if you’re hanging for a wave, wait for Sunday morning the 13th for a glassy but weak 3 ft wave. Or Thursday the 17th afternoon for small, clean, offshore conditions. That’s all she wrote.

Rusty.

Short Range Forecast

Light rain (total 7mm), mostly falling on Thu afternoon. Very mild (max 16°C on Mon night, min 13°C on Tue morning). Winds decreasing (strong winds from the SW on Mon night, light winds from the W by Wed morning).

Days 4-6 Weather Summary

Light rain (total 7mm), mostly falling on Thu night. Very mild (max 17°C on Sat night, min 13°C on Fri morning). Winds decreasing (strong winds from the SSW on Sat morning, calm by Sun morning).

Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
AM
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
1
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)
1.3
W
5
1.3
W
5
0.6
WSW
6
0.6
WSW
8
0.5
SW
8
0.4
SW
8
0.9
SW
4
1.4
SW
6
1.3
SW
7
0.7
SW
9
0.6
SW
8
0.5
SW
8
0.4
SW
7
1.3
SW
5
1.8
SW
7
1
SW
7
0.7
SW
7
0.5
SW
6
0.4
SW
6
0.6
SW
5
0.7
SW
5
Wave Graph
Metric surfscale
Energy kJ
80
0
22
43
31
15
32
123
169
75
54
29
14
96
267
93
49
20
9
17
21
Wind (km/h)
30
WNW
35
WNW
35
NW
25
WNW
15
SW
25
SSW
35
S
40
SSW
20
WNW
30
NNW
20
NNW
15
SSW
35
SSW
40
SSW
25
WSW
5
W
15
SSW
25
S
20
SW
25
SW
25
S
Wind State
cross-off
cross-off
cross-off
cross-off
cross-on
cross-on
on
cross-on
cross-off
cross-off
cross-off
on
on
cross-on
cross
glassy
on
on
cross-on
cross-on
on
High Tide
6:32AM3.46m
6:56PM3.92m
7:27AM3.80m
7:46PM4.33m
8:12AM4.10m
8:30PM4.65m
8:54AM4.33m
9:11PM4.83m
9:33AM4.45m
9:50PM4.85m
10:10AM4.47m
10:28PM4.72m
10:46AM4.37m
11:05PM4.46m
Low Tide
1:53PM0.82m
2:25AM0.38m
2:41PM0.50m
3:11AM0.08m
3:23PM0.27m
3:51AM-0.09m
4:02PM0.14m
4:29AM-0.11m
4:37PM0.12m
5:03AM0.00m
5:10PM0.20m
5:34AM0.22m
5:41PM0.37m
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
light rain
rain showers
clear
clear
clear
part cloud
light rain
rain showers
part cloud
clear
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:39
6:39
6:41
6:43
6:45
6:47
6:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:51
7:49
7:45
7:44
7:40
7:38
7:37
 mm
4
3
3
1
Temp °C
14
16
15
13
14
15
16
16
16
14
15
14
15
16
17
17
17
18
17
18
18
Feels °C
7
9
7
8
11
10
10
9
12
9
11
12
8
9
14
15
16
18
15
15
15
  • Map Icons:
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  • 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 Ceriad Surf forecast

The above surf forecast table for Porth Ceriad provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Porth Ceriad can be found by selecting the local surf guide option on the grey menu. Our Porth Ceriad 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 Ceriad) 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 Ceriad 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.

Porth Ceriad is 29 km (18 miles) from Porthmadog. If you plan a holiday in Lleyn Peninsula, look for hotels and other accommodation in Porthmadog. Porthmadog has rooms for a wide range of budgets as well as car hire and transport links.

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