Porth Ceriad Surf Break

Lat Long: 52.79° N 4.51° W

Porth Ceriad Surf Forecast and Surf Report

Issued: 12 pm 28 Aug 2026 (local time)

Forecast update in  hr  min

Today's Porth Ceriad sea temperature is
19.0°C
3.2° 

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 28 Aug 2026:

  • Best quality surf: Sunday 30 Aug, 1AM (local time) - 3ft (0.9m), 9s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 3 Sep, 1PM (local time) - 8ft (2.4m), 7s period, SW swell with 566 kJ wave energy.
  • Next surfable swell (1★+): Sunday 30 Aug, 1AM (local time) - 3ft (0.9m), 9s 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 (Aug 30) at 1AM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.4m and 4s. 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 2.4m 7s and forecast to arrive on Thursday (Sep 03) 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 0.9m 5s period and expected on Monday (Aug 31) at 10AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Sun 30th Aug)3ft (0.9m) 9s
Best Surf 1AM (Sun 30th Aug)3ft (0.9m) 9s
Most Powerful 1PM (Thu 3rd Sep)8ft (2.4m) 7s

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


The Lowdown

IMPERIAL

Alright folks, Rusty here. Let's be straight with you. This 16-day stretch for Porth Ceriad is a tough one to call. There are a couple of glimmers, but honestly, you’ll be waiting a long time for anything decent. The water’s sitting at a very unusual 66° – that’s over 5° warmer than normal for this time of year, which is a real shock to the system if you’re used to neoprene this time of August.

We kick off Friday the 28th with absolutely nothing to report. Tiny, weak 1ft SW slop with no energy (energy levels of just 7 and 13) and unfavourable wind. Saturday the 29th isn't any better, with a messy 3ft cross-shore chop in the morning. There is a clean window Saturday afternoon with a light cross-off breeze, but the wave height is only 1ft – not even worth paddling for.

Sunday the 30th through to the following week is mostly a write-off. We get a bump in swell on Monday the 31st with a 4ft SW swell and some moderate energy (182), and the wind is a clean cross-off, but the quality is still rated as poor. That about sums up the whole first week.

Now, there is one bright spot, but you have to be patient. On Sunday, September 6th in the afternoon, we finally get a pulse. The swell jumps to a solid 6ft from the SW, with a combined energy of 205 (moderate). The real winner here is the wind: light and clean from the NW, giving us a glassy cross-off. This is the best the forecast gets, and it's still 9 days out, so keep an eye on it. That 6ft is a bit much for beginners but should be fun for intermediate and above.

The rest of the second week fades fast. Monday the 7th is clean in the morning but tiny, and by Thursday the 10th we’re down to 0.3ft of useless wind swell. A long-period groundswell (12 seconds) tries to show up on Saturday the 12th of September, but it’s only 0.3ft – a tease at best.

So, the standout is that Sunday, September 6th afternoon session. It’s the only wave with any size and clean conditions. The rest of the month is a waiting game. When it's this flat, forecasts can shift, but right now, it's a quiet spell.

Rusty.

Short Range Forecast

Heavy rain (total 22mm), heaviest during Sun afternoon. Very mild (max 18°C on Sun morning, min 15°C on Sun night). Winds increasing (light winds from the NNE on Sat afternoon, fresh winds from the S by Sun afternoon).

Days 4-6 Weather Summary

Moderate rain (total 13mm), heaviest on Wed morning. Very mild (max 18°C on Mon night, min 15°C on Mon morning). Winds increasing (light winds from the SW on Tue afternoon, strong winds from the SW by Wed afternoon).

Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
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
1
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)
0.3
SW
6
0.4
SW
6
1.1
SW
5
0.8
SW
6
0.4
SW
6
0.9
SW
9
0.6
SW
8
1.1
SW
5
1.1
SW
8
1.1
SW
9
0.9
SW
8
0.9
WSW
5
1
W
4
0.5
SW
6
0.4
SW
6
0.8
SW
4
1.6
SW
6
1.1
SW
7
2
SW
6
2.1
SW
7
1.3
WSW
7
Wave Graph
Metric surfscale
Energy kJ
6
10
58
45
12
147
58
53
131
182
105
33
38
15
8
16
181
118
316
452
173
Wind (km/h)
10
WNW
15
SW
30
SW
25
E
10
NNE
15
WNW
25
S
35
S
15
WSW
25
WNW
15
W
20
W
20
W
10
SW
25
SSW
25
SSW
40
SW
25
WSW
20
SW
45
SW
45
WSW
Wind State
cross-off
cross-on
cross-on
cross
cross-off
cross-off
on
on
cross-on
cross-off
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
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
12:07PM4.09m
00:30AM4.13m
12:53PM3.82m
1:20AM3.76m
Low Tide
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
6:44AM0.65m
6:48PM0.80m
7:21AM0.92m
7:31PM1.04m
rain showers
clear
rain showers
mod rain
light rain
rain showers
rain showers
rain showers
thunderstorm
part cloud
clear
cloud
part cloud
clear
rain showers
light rain
light rain
light rain
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
6:22
6:22
6:24
6:26
6:28
6:30
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:16
8:14
8:12
8:09
8:07
8:05
8:02
 mm
1
2
6
2
1
3
5
2
4
5
2
2
Temp °C
17
17
17
17
17
16
18
16
16
15
17
18
15
16
17
16
17
18
17
17
17
Feels °C
16
16
14
14
17
13
13
10
13
11
15
15
11
13
13
10
12
15
11
11
10
  • 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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