Porth Ceriad Surf Break

Lat Long: 52.79° N 4.51° W

Porth Ceriad Surf Forecast and Surf Report

Issued: 12 am 15 Sep 2026 (local time)

Forecast update in  hr  min

Today's Porth Ceriad sea temperature is
17.7°C
2.3° 

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 15 Sep 2026:

  • Best quality surf: Sunday 20 Sep, 1AM (local time) - 4ft (1.2m), 6s period, SW swell with cross-offshore winds.
  • Most powerful swell: Friday 18 Sep, 10PM (local time) - 7ft (2.1m), 7s period, SW swell with 384 kJ wave energy.
  • Next surfable swell (1★+): Sunday 20 Sep, 1AM (local time) - 4ft (1.2m), 6s 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 Sunday (Sep 20) at 1AM. The primary swell is predicted to be 1.2m and 6s period with a secondary swell of 0.1m and 14s. Another secondary swell of 0.9m and 6s is also forecast. 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 Friday (Sep 18) 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 5s period and expected on Thursday (Sep 17) at 10PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Sun 20th Sep)4ft (1.2m) 6s
Best Surf 1AM (Sun 20th Sep)4ft (1.2m) 6s
Most Powerful10PM (Fri 18th Sep)7ft (2.1m) 7s

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


The Lowdown

Alright, grab your wettie, ‘cause I’ve had a look at the charts for Porth Ceriad, and it’s a bit of a tale of two weeks. We’ve got a run of surf on the way, but the conditions are gonna make you work for it. To be straight with you, the whole window is a bit messy, but there’s a couple of moments that might just be worth the paddle out.

The first week is all about a fresh, westerly wind that’s gonna be blowing across the swell, not exactly offshore. For Tuesday the 15th, we’re lookin’ at some 4ft swell from the WSW with a short, 6-second period. The energy’s weak at 113, and that cross-off breeze is gonna keep the surface clean-ish but a bit bumpy. It’s a poor surf day, not a total flat spell, but nothing to get excited about. Wednesday the 16th drops right off to nothing – 1ft is all we get, so don’t bother.

We get a bit of a pulse for Thursday the 17th, with the swell jumping to 5ft from the WSW. The energy’s climbing to a moderate 181, but the wind stays cross-off, and that 7-second period is still short, so it’s gonna be a bit walled and messy. Friday’s a washout with a strong cross-onshore wind and a dropping swell. Then Saturday the 19th is the biggest of the run, with 6ft from the SW and moderate energy (286). That’s the standout size-wise, but the cross-onshore wind is gonna make it lumpy and choppy. It’s the biggest, but it’s not the cleanest.

After that, the swell fades again. Sunday morning on the 20th sees a drop to 3ft with onshore winds. The rest of the week into the 22nd is just small, weak dribble with a few onshore breezes. It’s a real bummer of a stretch, with no clean, rideable swell. The water temp is about average for this time of year, so nothing crazy there.

Now, lookin’ into the second week, it’s a dry spell. From the 23rd of September right through to the 30th, we’re talking about ankle-biters. The swell is mostly under 2ft and the energy readings are pathetic – single digits and low double digits. There’s a hint of some long-period energy on the 23rd and 25th, but it’s a massive 16-second period on a 0.3ft wave – that’s just an ocean swell, not a surfable wave. The mornings are glassy on the 26th with a light offshore, which would be nice, but there’s no swell to push in. It’s a week for fixing your fins and doing something else.

So, for this period, most of the days are just blown out or flat. The only real punch of swell is that Saturday the 19th, but it’s gonna be a messy one. If you’re desperate for a wave, that’s your biggest chance, but it’ll be for the experienced heads who don’t mind the chop. The first week has more size, but it’s fighting a cross-off wind all the way. The second week is a total blank. Honestly, if you see any decent surfable conditions, it’s gonna be a bonus. You might be better off with a kiteboard with those cross-shore winds, but for a paddle surfer, it’s a tough outlook.

Hang in there, and don’t be afraid to check back – these forecasts change.

Rusty

Short Range Forecast

Moderate rain (total 16mm), heaviest on Mon night. Very mild (max 18°C on Mon night, min 13°C on Tue night). Winds decreasing (strong winds from the SSW on Mon night, moderate winds from the W by Wed afternoon).

Days 4-6 Weather Summary

Moderate rain (total 10mm), heaviest on Fri night. Very mild (max 19°C on Sat afternoon, min 13°C on Thu night). Winds decreasing (strong winds from the SSW on Fri afternoon, calm by Sat night).

Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
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
1
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)
1.3
WSW
6
1.2
W
5
0.6
SW
6
0.4
SW
7
0.6
WSW
5
1.4
SW
5
1.5
WSW
7
1.4
W
5
1.5
W
6
1.1
W
5
1.2
SW
5
1.9
SW
7
1.8
SW
7
1.8
SW
7
1.2
SW
6
0.8
SW
6
0.6
SW
6
1
SW
5
0.8
SW
5
0.6
SW
4
0.6
SW
4
Wave Graph
Metric surfscale
Energy kJ
113
82
30
13
20
110
181
106
0
56
67
325
286
279
116
46
24
46
25
16
14
Wind (km/h)
30
W
25
W
35
NW
30
NW
20
W
40
WSW
30
WNW
35
W
30
WNW
30
WSW
40
SW
40
WSW
30
WSW
25
WSW
10
NW
5
S
15
S
15
SSW
15
SSE
10
SSW
5
S
Wind State
cross-off
cross-off
cross-off
cross-off
cross
cross-on
cross-off
cross
cross-off
cross
cross-on
cross-on
cross-on
cross-on
cross-off
on
on
on
on
cross-on
on
High Tide
11:22AM4.16m
11:41PM4.11m
11:57AM3.87m
00:18AM3.70m
12:34PM3.53m
00:57AM3.28m
1:15PM3.17m
1:45AM2.89m
2:13PM2.85m
3:05AM2.60m
4:04PM2.70m
5:14AM2.61m
5:48PM2.90m
Low Tide
6:02AM0.51m
6:10PM0.60m
6:28AM0.82m
6:38PM0.87m
6:53AM1.13m
7:13PM1.16m
7:27AM1.41m
8:05PM1.45m
8:28AM1.66m
9:31PM1.65m
10:10AM1.77m
11:24PM1.64m
11:57AM1.65m
00:48AM1.40m
part cloud
rain showers
rain showers
part cloud
part cloud
rain showers
part cloud
part cloud
clear
part cloud
light rain
mod rain
part cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:50
6:52
6:54
6:56
6:56
6:58
7:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:34
7:31
7:29
7:27
7:24
7:22
7:20
 mm
1
1
4
3
7
Temp °C
15
16
15
14
15
15
14
16
14
15
14
16
17
19
17
15
16
17
16
17
16
Feels °C
9
12
10
9
10
9
8
10
7
9
7
10
13
15
15
13
15
17
15
17
16
  • 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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