Porth Ceriad Surf Break

Lat Long: 52.79° N 4.51° W

Porth Ceriad Surf Forecast and Surf Report

Issued: 12 am 06 Sep 2026 (local time)

Forecast update in  hr  min

Today's Porth Ceriad sea temperature is
18.0°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 6 Sep 2026:

  • Best quality surf: Monday 7 Sep, 7AM (local time) - 3ft (0.9m), 6s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Saturday 12 Sep, 10PM (local time) - 6ft (1.9m), 7s period, SW swell with 305 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 7AM (local time) - 3ft (0.9m), 6s 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 Monday (Sep 07) at 7AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.3m and 15s. 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 7s 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 1.8m 6s period and expected on Wednesday (Sep 09) at 1AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Mon 7th Sep)3ft (0.9m) 6s
Best Surf 7AM (Mon 7th Sep)3ft (0.9m) 6s
Most Powerful10PM (Sat 12th Sep)6ft (1.9m) 7s

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


The Lowdown

Alright, Rusty here. Let’s have a look at what’s coming our way for Porth Ceriad over the next couple of weeks.

Right off the bat, I’ve got to be straight with you – it’s a rough start. We’re looking at a long, frustrating gap. From now through the 14th of September, there is genuinely nothing worth paddling out for. The wind is howling from the wrong directions, mostly onshore or cross-onshore, and the swell is small, weak, and messy. The combined wave energy is barely registering, often below 100, which tells you there’s just no push behind it. You’ll be bobbing around on a washing machine, not a wave. It’s a solid week plus of flat or poor conditions.

Things finally start to flicker to life on Tuesday the 15th of September, and that’s where our one and only real standout sits. Tuesday morning is the pick of the whole forecast. We’ve got a clean 5 ft swell rolling in from the SW, and the wind is a light breeze from the WNW, clocking in as cross-offshore. That means clean, peeling faces. The combined energy jumps to 157 (moderate wave energy), so there’s some proper grunt in the water. This is a beginner-friendly break, and with conditions that clean, it’ll be a fun, easy session. Small but workable.

Now, the afternoon of the 15th sees the swell bump up to 6 ft, but the wind swings WSW and goes cross-shore, introducing a slight chop. Still rideable, but nowhere near as nice as that morning glass. It’s a bit lumpy, and the crowd situation at Porth Ceriad is noted as "often" busy, so expect company if you time it for that afternoon push.

The only other window worth a mention is Friday the 18th of September. A moderate offshore breeze from the NNW keeps things tidy, and we’ve got a consistent 4 ft SW swell with combined energy around 100. It’s surfable, but very ordinary. Not a standout, just a “get wet if you’re desperate” kind of day. The wind is moderate offshore, so the waves will be clean, but the energy is on the lower side.

After that, the swell fades right out again for the rest of the run into the 21st, with tiny, weak pulses and poor wind. It’s a classic case of one brief window of joy surrounded by a whole lot of nothing.

So, if you’ve got a date, mark it for the morning of Tuesday the 15th. That’s your one true shot at a clean, fun session. The rest of this 16-day run is a write-off for paddle surfing. If the wind keeps up like this on the 15th afternoon, it might actually look more interesting for a kite foiler than a longboarder.

Rusty.

Short Range Forecast

Light rain (total 6mm), mostly falling on Sat night. Warm (max 20°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the WNW on Sun night, strong winds from the SW by Mon night).

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Thu night. Very mild (max 17°C on Thu night, min 13°C on Tue night). Winds decreasing (strong winds from the WNW on Tue night, light winds from the W by Wed night).

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
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)
0.9
SW
5
1.1
SW
6
1.2
SW
6
0.4
SW
14
1.2
SW
5
1.7
WSW
6
1.5
W
5
1.5
W
5
1.8
WNW
6
1.4
WNW
6
0.8
WSW
5
0.7
WSW
4
1.1
SW
5
1.3
SW
6
1.1
SW
7
0.7
SW
7
0.5
SW
8
0.4
SW
8
0.4
SW
8
1.3
SSW
5
1.6
WSW
7
Wave Graph
Metric surfscale
Energy kJ
42
87
96
52
62
209
115
126
0
0
31
16
53
104
118
49
31
20
14
90
236
Wind (km/h)
30
SSE
30
SSW
25
SW
20
W
30
SW
40
WSW
30
W
30
W
40
NW
30
NW
20
WSW
10
W
20
SSW
30
SSW
25
SW
25
NW
20
NNW
0
NE
25
S
40
SSW
30
SW
Wind State
on
on
cross-on
cross
cross-on
cross-on
cross
cross
cross-off
cross-off
cross-on
cross-off
on
on
cross-on
cross-off
cross-off
glassy
on
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
clear
part cloud
part cloud
cloud
cloud
rain showers
clear
part cloud
clear
clear
part cloud
part cloud
cloud
light rain
rain showers
clear
clear
clear
part cloud
light rain
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
4
1
3
3
Temp °C
19
20
17
15
16
16
14
16
14
14
16
16
15
16
17
16
15
14
17
17
17
Feels °C
14
15
13
11
11
8
8
10
6
9
11
13
11
12
13
12
11
12
12
11
13
  • 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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