Porth Ceriad Surf Break

Lat Long: 52.79° N 4.51° W

Porth Ceriad Surf Forecast and Surf Report

Issued: 12 pm 06 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 6 Sep 2026:

  • Best quality surf: Friday 11 Sep, 1PM (local time) - 2ft (0.6m), 6s period, SW swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 1PM (local time) - 3.5ft (1.1m), 13s period, WSW swell with 434 kJ wave energy.
  • Next surfable swell (1★+): Friday 11 Sep, 1PM (local time) - 2ft (0.6m), 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 Friday (Sep 11) at 1PM. The primary swell is predicted to be 0.6m and 6s period with a secondary swell of 0.4m and 8s. 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 1.1m 13s and forecast to arrive on Monday (Sep 07) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s period and expected on Wednesday (Sep 09) at 1AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Fri 11th Sep)2ft (0.6m) 6s
Best Surf 1PM (Fri 11th Sep)2ft (0.6m) 6s
Most Powerful 1PM (Mon 7th Sep)3.5ft (1.1m) 13s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what Porth Ceriad has on the menu over the next couple of weeks.

Right off the bat, I gotta say, it’s looking pretty grim for a good paddle. The water’s sitting at 64°, which is a solid 4° warmer than normal for this time of year – feels more like a late summer swim than an autumn session, but don’t get too stoked, because the waves just aren’t cooperating.

The whole 16-day window is a bit of a desert, honestly. We’re looking at a long stretch with nothing rideable. Starting Sunday September 6th, it’s poor surf conditions with onshore winds (22 mph from the SSE in the morning, easing a bit to 16 mph from the SSW by afternoon) and tiny, weak swell – energy levels are barely a whisper at 66 and 86 (weak energy). The swell is short-period windswell at 5-6 seconds, completely out of sorts.

Monday September 7th is the most interesting, but not in a good way. There’s a pulse of long-period (14 seconds) groundswell from the WSW pushing the combined energy up to 456 (moderate energy) with a head-high 3 ft on the morning, bumping to 5 ft in the afternoon. Sounds promising, right? Wrong. Monday morning is blown out with a 16 mph cross-shore, and the afternoon is even worse – 22 mph cross-onshore from the SW making it a lumpy mess. The wave comment says "poor surf conditions" across the board, and I trust that.

Tuesday September 8th sees a clean-looking morning with a cross-offshore breeze from the W at 22 mph, and 5 ft swell. But again, the energy is low (139 - moderate) and the period is a weak 6 seconds. It’s not holding together. By afternoon, the wind swings cross-shore at 25 mph and it turns into a washing machine.

From Wednesday September 9th right through to the end of the forecast on Monday September 21st, it’s a relentless run of tiny, weak swells, wrong winds, and "poor surf conditions" ratings. We see occasional clean windows (like Friday September 11th afternoon with a light NW breeze, or September 18th Friday afternoon with a cross-offshore), but the swell is barely knee-high (2 ft to 4 ft at best) and the energy is pathetic – all two-digit figures (weak energy) or low three-digit (moderate energy). The period stays short, mostly 4-8 seconds, except for a couple of weird 11-12 second spikes on September 15th that deliver almost no height (0.3 ft). That’s not surf, that’s just a ripple.

Honestly, there isn’t a single standout day in this entire outlook. If you’re desperate for a paddle on a longboard, maybe the Friday September 11th afternoon or Saturday September 19th morning might give you a tiny, clean ankle-snapper, but don’t hold your breath. For any real wave riding, this is a total write-off. The surf setup looks more interesting for kite surfing than paddle surfing on any day with decent wind, but for us wave hunters, it’s a blank run. It’s the kind of stretch that’s more normal for this spot when the autumn lulls set in.

Rusty.

Short Range Forecast

Moderate rain (total 15mm), heaviest on Mon night. Warm (max 20°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the W on Sun night, strong winds from the SW by Mon night).

Days 4-6 Weather Summary

Light rain (total 6mm), mostly falling on Fri night. Very mild (max 18°C on Thu night, min 13°C on Wed morning). Mainly strong winds.

Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
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
1
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
1.1
SW
6
1.2
SW
6
1
WSW
14
1.4
SW
5
2.2
SW
7
1.5
W
6
1.6
W
6
1.9
WNW
6
0.8
WSW
6
0.7
WSW
8
1
SW
5
1.6
SW
6
1.3
SW
6
1.1
SW
6
0.9
SW
6
0.6
SW
8
0.4
SW
8
1.1
SW
6
0.9
SW
6
0.6
SW
7
Wave Graph
Metric surfscale
Energy kJ
56
80
102
389
94
400
139
154
0
46
52
41
187
136
86
56
53
20
93
70
43
Wind (km/h)
35
SSE
25
SSW
30
SW
25
WSW
35
SW
45
SW
35
W
40
W
45
WNW
30
NW
15
WSW
30
SW
35
SW
30
SW
35
WSW
20
NW
10
NW
25
S
45
SSW
25
SW
15
SW
Wind State
on
on
cross-on
cross
cross-on
cross-on
cross-off
cross
cross-off
cross-off
cross-on
cross-on
cross-on
cross-on
cross
cross-off
cross-off
on
cross-on
cross-on
cross-on
High Tide
4:32PM3.23m
5:21AM3.19m
5:54PM3.50m
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
Low Tide
11:30AM1.41m
00:19AM1.15m
12:52PM1.16m
1:31AM0.77m
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
part cloud
part cloud
part cloud
cloud
cloud
rain showers
clear
part cloud
part cloud
part cloud
clear
light rain
rain showers
part cloud
rain showers
part cloud
clear
light rain
rain showers
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:35
6:37
6:39
6:39
6:41
6:43
6:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:55
7:52
7:51
7:49
7:45
7:44
7:40
 mm
15
1
1
2
2
2
Temp °C
19
20
17
16
16
16
14
16
14
14
14
15
17
17
18
15
15
16
17
18
18
Feels °C
14
16
14
11
10
7
6
8
5
10
11
9
12
13
13
12
13
12
10
15
16
  • 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 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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