Porth Ceriad Surf Break

Lat Long: 52.79° N 4.51° W

Porth Ceriad Surf Forecast and Surf Report

Issued: 12 am 26 Aug 2026 (local time)

Forecast update in  hr  min

Today's Porth Ceriad sea temperature is
18.5°C
2.7° 

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 26 Aug 2026:

  • Best quality surf: Friday 28 Aug, 1PM (local time) - 3.5ft (1.0m), 6s period, SW swell with cross-offshore winds.
  • Most powerful swell: Saturday 29 Aug, 10PM (local time) - 6ft (1.8m), 9s period, SW swell with 454 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 1PM (local time) - 3.5ft (1.0m), 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 (Aug 28) at 1PM. The primary swell is predicted to be 1.0m 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 1.8m 9s and forecast to arrive on Saturday (Aug 29) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Monday (Aug 31) at 7AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Fri 28th Aug)3.5ft (1.0m) 6s
Best Surf 1PM (Fri 28th Aug)3.5ft (1.0m) 6s
Most Powerful10PM (Sat 29th Aug)6ft (1.8m) 9s

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


The Lowdown

G’day, Rusty here. Let’s be straight up – if you’re after a decent wave at Porth Ceriad over the next 16 days, you’re gonna be doing a lot more waiting than surfing. There’s almost no real surf to speak of, so don’t be in a rush to paddle out.

First up, from now – Wednesday 26th August – right through to the end of the month, it’s a total write-off. We’re talking ankle-sloshers under 0.7 ft with weak energy (9–13). The wind is a mess of cross and onshore directions and there’s rain around. Nothing to even bother looking at.

Thursday 27th is just as grim – even less swell at 0.3 ft and the wind is all over the shop. The water temp anomaly is about average for this time of year, but who cares when you can’t even get wet.

Friday 28th sees a bit of life, with the swell bumping up to 4 ft from the SW, but the period is a weak 6 seconds and it’s cross-onshore at 19 mph. The combined energy is moderate at 106, but it’s lumpy and messy – definitely not one to get excited about. The size is still okay for beginners, but the quality is shithouse.

Saturday 29th is worse – onshore winds ramping up to 28 mph, 7 ft of junky SW swell, and that moderate energy jumps to 347. It’s messy, blown out, and only for the hardcore or the kite crew.

Sunday 30th through Wednesday 2nd September is more of the same – small, weak, and onshore or cross-onshore. The swell rarely tops 5 ft, and when it does, the period is short and the wind ruins it. Combined energy stays under 230 most days.

Finally, a little window appears late in the piece. On Friday 4th September morning, we get a glimpse of what could’ve been – 3 ft from the SW, with a clean offshore N wind at 9 mph. The waves are surfable but ordinary, and the energy is weak (48). It’s a beginner-friendly size and the conditions are clean, so if you’re desperate and have a foamie, it’s the best of a bad bunch.

Sunday 6th September afternoon is another potential – 5 ft from the SSE, glassy conditions with light air, and the energy is moderate (101). The period is only 5 seconds though, so it’s a bit fat and crumbly, but at least it’s clean.

Then things get ugly again – Monday 7th September brings a 10 ft SW swell with a 9-second period, but it’s onshore at 28 mph with a massive energy reading of 1332. That’s a lot of power, but it’s a horrendous, blown-out mess – only for expert kamikazes or kites. After that, it fades back to tiny, weak, and wind-affected through to the 10th.

Bottom line:
Porth Ceriad isn’t firing at all. The best you can hope for is the morning of Friday 4th September – a clean 3 ft offshore morning for the beginners, or Sunday 6th September afternoon if you want a glassy but short-period 5 ft. Everything else is a complete write-off. A blank run like this is pretty normal for the area when the wind and swell don’t line up.

Rusty.

Short Range Forecast

Heavy rain (total 40mm), heaviest during Thu afternoon. Warm (max 22°C on Wed afternoon, min 16°C on Thu afternoon). Winds increasing (light winds from the NE on Wed afternoon, fresh winds from the SSW by Thu night).

Days 4-6 Weather Summary

Moderate rain (total 19mm), heaviest on Fri night. Very mild (max 18°C on Sat morning, min 14°C on Sun night). Winds decreasing (strong winds from the SSW on Sat morning, light winds from the W by Sun night).

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
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
1
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)
0.2
SSW
8
0.2
SSW
8
0.1
SW
7
0.1
SW
12
0.1
W
12
0.8
SSW
4
1.2
SW
6
0.9
SW
7
1.3
SW
5
1.4
SW
6
2
SW
7
1.6
SW
9
1
SW
9
0.6
SW
9
0.6
SW
7
0.7
SW
7
1.2
SW
5
1.8
SW
6
1.6
WSW
7
1
SW
7
0.6
SW
7
Wave Graph
Metric surfscale
Energy kJ
6
6
2
6
3
21
106
73
92
138
347
446
162
61
34
56
65
247
229
104
42
Wind (km/h)
15
E
5
NE
15
ENE
10
ESE
20
SW
25
SW
30
SW
10
SW
30
SSW
35
SSW
45
SW
35
W
20
SSE
25
SSW
25
NW
30
WNW
35
SW
15
W
25
SSW
30
SW
40
SW
Wind State
cross
cross-off
cross-off
cross
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross
on
on
cross-off
cross-off
cross-on
cross
cross-on
cross-on
cross-on
High Tide
8:04AM3.49m
8:20PM3.91m
8:37AM3.75m
8:52PM4.21m
9:08AM3.98m
9:23PM4.45m
9:41AM4.17m
9:56PM4.61m
10:14AM4.29m
10:31PM4.67m
10:49AM4.33m
11:07PM4.61m
11:27AM4.26m
11:46PM4.43m
Low Tide
3:01PM0.77m
3:27AM0.54m
3:34PM0.55m
4:01AM0.34m
4:07PM0.40m
4:34AM0.22m
4:39PM0.34m
5:06AM0.19m
5:11PM0.35m
5:39AM0.26m
5:43PM0.44m
6:11AM0.42m
6:15PM0.60m
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cloud
part cloud
mod rain
heavy rain
mod rain
rain showers
part cloud
rain showers
rain showers
rain showers
clear
rain showers
rain showers
rain showers
part cloud
rain showers
part cloud
part cloud
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part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:18
6:20
6:22
6:22
6:24
6:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:21
8:19
8:16
8:14
8:12
8:09
8:07
 mm
6
23
9
2
5
4
1
4
2
2
1
Temp °C
20
22
22
17
17
16
17
18
17
18
18
16
16
17
16
14
17
17
16
17
17
Feels °C
20
22
21
17
16
13
17
17
14
13
12
10
13
13
13
8
12
13
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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