Porth Ceriad Surf Break

Lat Long: 52.79° N 4.51° W

Porth Ceriad Surf Forecast and Surf Report

Issued: 6 am 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Porth Ceriad sea temperature is
19.2° C
3.3° 

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 17 Aug 2026:

  • Most powerful swell: Wednesday 19 Aug, 7PM (local time) - 5.5ft (1.7m), 6s period, WSW swell with 216 kJ wave energy.

Best Forecast Surf Conditions for Porth Ceriad this week:

The most powerful waves expected at Porth Ceriad in the next 16 days are 1.7m 6s and forecast to arrive on Wednesday (Aug 19) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Thursday (Aug 20) at 1PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 7PM (Wed 19th Aug)5.5ft (1.7m) 6s

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


The Lowdown

Alright folks, Rusty here. Let's have a proper look at what Porth Ceriad has in store for us over the next couple of weeks.

To be straight with you, it’s a tough run ahead. The first ten days or so are looking pretty bleak. We’ve got a long, frustrating gap from now all the way through until the afternoon of Wednesday, the 26th of August, where there’s nothing really worth paddling out for. The swell just isn’t there. It’s tiny, weak stuff with barely any push – a lot of readings below 2ft and combined wave energy numbers mostly in the single digits or teens. There’s some clean offshore wind here and there, but with no swell, it’s just a flat, pretty ocean.

Then, finally, things start to rumble to life. On Wednesday afternoon, the 26th, the swell jumps to 8ft from the SW with a period of 7 seconds. The combined energy hits 481 – that’s a proper kick of power, but with that strong cross-off breeze at 16 mph, it’s going to be a bit raw and only for the experienced. It’s still a bit of a dicey call, with marginal conditions. Thursday morning, the 27th, gets even bigger, with 8ft of WSW swell and that energy number roaring up to 1006. That’s a lot of water moving, and the period is still a short 8 seconds, so it’ll be a lumpy, powerful beast. With the fresh cross-off breeze from the NW at 19 mph, this is expert territory only, and honestly, it looks like a better day for the kite crew than paddle surfers at this exposed beach.

The real standout, the one you’ve been waiting for, is the afternoon of Sunday, the 30th of August. We’ve got a nice-looking south-west swell at 7ft, with a period of 7 seconds, and the wind is set to be a clean, moderate offshore from the north at 12 mph. That offshore wind will groom that swell into some clean, hollow lines, and the combined energy of 335 is solid. This is your best chance for a proper session, though that 7ft is pushing it for beginners. It’s promising, but it’s still a week and a half away, so keep an eye on it.

After that, it drops off again into early September with smaller, less organised swell and more onshore wind. There’s a little glimmer on Tuesday morning, the 1st of September, with 4ft of SW swell and light cross-off wind, but the wave quality is described as just "ordinary."

So, to sum it up: a long flat spell, a couple of wild and woolly days for experts only, and one real shot at some clean, offshore waves on Sunday afternoon, the 30th of August. That’s your pick of the 16 days.

Rusty.

Short Range Forecast

Light rain (total 6mm), mostly falling on Mon night. Very mild (max 19°C on Tue afternoon, min 15°C on Tue night). Winds increasing (light winds from the NW on Mon morning, fresh winds from the WSW by Wed morning).

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Thu morning. Very mild (max 17°C on Thu morning, min 13°C on Thu night). Mainly fresh winds.

Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
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
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)
0.5
SW
5
0.4
SW
5
0.9
WSW
5
0.9
WSW
6
0.6
WSW
6
0.9
WSW
4
1.3
WSW
5
1.6
SW
6
1.5
WSW
6
0.6
SW
7
0.4
SW
6
0.1
SW
14
0.1
SW
13
0.4
NW
4
0.1
W
16
0.1
SW
15
0.1
SW
15
0.1
SW
15
0.1
SW
14
0.4
NW
4
0.1
SW
14
Wave Graph
Metric surfscale
Energy kJ
13
7
40
66
22
27
90
184
145
35
10
8
7
3
7
9
9
8
8
7
8
Wind (km/h)
15
NW
10
W
25
WSW
20
W
15
SW
35
W
35
WSW
35
SW
25
WNW
25
N
30
NNW
20
N
15
NNW
15
NW
20
N
20
N
25
NNW
15
N
15
NNW
20
NNW
20
N
Wind State
cross-off
cross
cross-on
cross-off
cross-on
cross
cross-on
cross-on
cross-off
off
off
off
off
cross-off
off
off
off
off
off
cross-off
off
High Tide
11:55AM4.03m
00:15AM4.20m
12:35PM3.75m
00:56AM3.78m
1:17PM3.43m
1:41AM3.34m
2:05PM3.11m
2:38AM2.96m
3:15PM2.85m
4:06AM2.73m
4:55PM2.79m
5:42AM2.76m
6:14PM2.97m
Low Tide
6:49PM0.61m
7:18AM0.70m
7:22PM0.88m
7:50AM1.04m
7:58PM1.17m
8:25AM1.34m
8:46PM1.43m
9:17AM1.59m
10:04PM1.63m
10:53AM1.71m
00:05AM1.62m
12:43PM1.59m
1:27AM1.39m
part cloud
part cloud
light rain
cloud
cloud
part cloud
cloud
light rain
rain showers
rain showers
clear
part cloud
clear
clear
part cloud
clear
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:03
6:05
6:07
6:07
6:09
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:40
8:38
8:37
8:34
8:31
8:30
8:28
 mm
2
3
1
2
Temp °C
16
17
18
16
19
18
15
17
17
17
17
15
14
16
14
15
15
15
14
15
15
Feels °C
15
15
16
13
15
14
8
12
13
13
11
11
10
12
8
10
10
11
12
12
12
  • 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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