Porth Ceriad Surf Break

Lat Long: 52.79° N 4.51° W

Porth Ceriad Surf Forecast and Surf Report

Issued: 12 am 10 Sep 2026 (local time)

Forecast update in  hr  min

Today's Porth Ceriad sea temperature is
18.1°C
2.5° 

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 10 Sep 2026:

  • Best quality surf: Friday 11 Sep, 1PM (local time) - 2ft (0.6m), 7s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 10 Sep, 4PM (local time) - 7ft (2.1m), 7s period, SW swell with 410 kJ wave energy.
  • Next surfable swell (1★+): Friday 11 Sep, 1PM (local time) - 2ft (0.6m), 7s period with SW 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 1PM. The primary swell is predicted to be 0.6m and 7s 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 2.1m 7s and forecast to arrive on Thursday (Sep 10) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Tuesday (Sep 15) at 7PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Fri 11th Sep)2ft (0.6m) 7s
Best Surf 1PM (Fri 11th Sep)2ft (0.6m) 7s
Most Powerful 4PM (Thu 10th Sep)7ft (2.1m) 7s

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


The Lowdown

Alright, let’s get into it. It’s Rusty here.

To be straight with you, the next couple of weeks at Porth Ceriad are looking pretty grim overall. There’s surf on offer, but it’s mostly small and the wind is going to make a mess of things more often than not. The first real chance to get wet isn’t until the morning of Thursday the 18th of September, and even then it’s only just surfable. The water temp is sitting at 65°F, which is much warmer than normal for this time of year – a real standout that’s going to feel good in a wetsuit.

The best window in the whole run is the morning of Sunday the 20th of September. We’ve got a 6ft swell rolling in from the west with a 6-second period. The combined wave energy is moderate (284). The wind is glassy, dead calm, and that’s a major point – it’s going to be clean as a whistle. This is the one to circle on the calendar. The swell direction (west) isn't the absolute optimum (southwest) but it's close enough to make it work. The wave comment says “expect good surf conditions” and I believe it. It’s the only session in the whole 16-day stretch that earns that kind of hype. Crowds are often at Porth Ceriad, so expect company.

Now, for the rest of it: Thursday the 18th of September morning has clean 4ft waves, but it’s rated as very ordinary. The wind is light offshore from the NNW, so it’s rideable, but not a standout. The whole run before that is a write-off: on the 10th and 12th we get some bigger swell up to 7ft (moderate energy of 371 and 347), but the wind is strong and cross-onshore, turning it into a messy, choppy scene. The 19th of September gets a bump in size again with 7ft from the west-southwest, but again cross-shore wind and chop spoil it. That’s too big for beginners and with that wind, only worth looking at if you’re a masochist.

After that standout Sunday morning, the wind returns to onshore on Sunday afternoon and the waves drop off fast. The rest of the forecast is small, weak, and wind-affected. The very last session on Wednesday afternoon the 24th of September is glassy and a tiny 2ft, but it’s so small it’s hard to call it surf.

So there it is. One golden window: the morning of Sunday the 20th of September at Porth Ceriad. Clean, chest-high west swell, glassy. Mark it. The rest is a lot of waiting.

Rusty.

Short Range Forecast

Light rain (total 5mm), mostly falling on Thu afternoon. Very mild (max 18°C on Thu night, min 14°C on Wed night). Winds decreasing (strong winds from the SSW on Thu morning, light winds from the WNW by Fri afternoon).

Days 4-6 Weather Summary

Light rain (total 9mm), mostly falling on Tue morning. Very mild (max 18°C on Mon morning, min 13°C on Sun morning). Winds increasing (light winds from the WNW on Sun morning, fresh winds from the S by Mon night).

Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
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
1
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)
1.2
SW
5
2.1
SW
7
1.4
WSW
7
0.7
SW
8
0.6
WSW
8
0.9
SW
4
2
SW
6
2
SW
7
1.1
SW
7
0.6
SW
6
0.5
SW
6
0.4
SW
6
1.1
SW
5
1.5
SW
6
1.5
SW
6
1
SW
6
0.6
WSW
6
0.3
SW
6
0.2
WSW
6
0.1
W
11
0.1
W
9
Wave Graph
Metric surfscale
Energy kJ
67
410
185
57
44
29
325
347
111
34
20
9
69
141
161
73
25
5
3
2
2
Wind (km/h)
40
S
40
SSW
25
WNW
25
NW
5
WNW
30
SSW
40
SW
35
SW
15
NW
15
N
10
W
25
SSW
25
SW
30
SSW
30
S
35
S
25
NW
40
NNW
40
NNW
35
NNW
25
NW
Wind State
on
cross-on
cross-off
cross-off
cross-off
on
cross-on
cross-on
cross-off
off
cross
on
cross-on
cross-on
on
on
cross-off
cross-off
off
off
cross-off
High Tide
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
11:22AM4.16m
11:41PM4.11m
11:57AM3.87m
00:18AM3.70m
Low Tide
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
6:02AM0.51m
6:10PM0.60m
6:28AM0.82m
6:38PM0.87m
light rain
light rain
rain showers
part cloud
clear
part cloud
cloud
part cloud
rain showers
part cloud
cloud
rain showers
part cloud
part cloud
part cloud
rain showers
thunderstorm
rain showers
rain showers
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:43
6:45
6:47
6:48
6:50
6:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:45
7:44
7:40
7:38
7:37
7:34
7:31
 mm
1
2
2
2
1
5
1
2
2
Temp °C
16
17
18
14
14
16
17
18
17
14
14
16
18
18
17
17
18
15
14
14
14
Feels °C
9
12
14
10
13
10
11
13
16
13
12
13
15
14
14
12
15
9
7
8
10
  • 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 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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