Porth Ceriad Surf Break

Lat Long: 52.79° N 4.51° W

Porth Ceriad Surf Forecast and Surf Report

Issued: 12 pm 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Porth Ceriad sea temperature is
19.2° C
3.3° 

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 16 Aug 2026:

  • Most powerful swell: Wednesday 19 Aug, 7PM (local time) - 5ft (1.6m), 6s period, SW swell with 176 kJ wave energy.

Best Forecast Surf Conditions for Porth Ceriad this week:

The most powerful waves expected at Porth Ceriad in the next 16 days are 1.6m 6s and forecast to arrive on Wednesday (Aug 19) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Thursday (Aug 20) at 7AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 7PM (Wed 19th Aug)5ft (1.6m) 6s

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


The Lowdown

Right then, let’s have a look at what’s on the cards for Porth Ceriad.

Honestly, mate, I’m looking at the next two and a bit weeks and it’s a bit of a struggle. We’ve got a long, quiet spell ahead. From Sunday the 16th right the way through to Tuesday the 25th of August, the surf is basically flat. We’re talking ankle-snappers at best, with swell heights mostly scraping 0.3ft to 1ft. The energy is just not there – the combined energy readings are all below 100, mostly single digits or low teens, which is about as weak as it gets. It’s going to be a long, drawn-out wait.

Now, there’s a bit of early hope on Wednesday the 19th when a pulse pushes swell up to 5ft to 5ft from the WSW and SW, with the energy climbing into three digits (121 on the Wednesday morning, 158 on the afternoon). But the wind is a total mess – strong cross and cross-onshore breezes up to 25 mph, and it’s described as lumpy and messy. For a spot that’s exposed and faces SW, that’s not going to be clean. That’s more of a kite-surfing sort of day for a paddle.

The real standout, and I mean the *only* proper window I’d circle on the calendar, is a few weeks out. Things look like they might actually line up around Friday the 28th and Saturday the 29th of August. On the 28th, we’ve got a solid 4ft SW swell with a period of 8 seconds pushing through. The combined energy is really strong – 227 on the morning and 266 on the afternoon. The wind is the problem then, being onshore and cross-onshore. But then look at Saturday the 29th of August morning: we get the same 4ft of swell from the W, with a 5-second period, and the wind swings to a clean cross-offshore breeze from the WNW at 16 mph. That should clean things right up.

That Saturday morning is your best bet. It’s not a huge swell, but it’s backed by that strong wave energy (92) and the wind will be perfect for Porth Ceriad. It’s a beginner-friendly spot, fairly consistent, and it’s exposed to that SW fetch, so the WNW wind will be blowing straight off the land. It’s a bit far out to lock in, but that’s the one to keep an eye on. The water is sitting at 67°F on the 16th, which is a whopping 6° warmer than usual – that’s very unusual, bathwater stuff for mid-August.

So, to wrap it up: a long, flat, frustrating start, then a messy pulse mid-week, but the real promise is that Saturday the 29th morning. It’s a rare highlight in a bleak run – let’s hope it holds.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Mon night. Very mild (max 18°C on Mon night, min 14°C on Sun morning). Winds increasing (calm on Sun morning, fresh winds from the WSW by Tue night).

Days 4-6 Weather Summary

Light rain (total 9mm), mostly falling on Wed morning. Very mild (max 17°C on Wed afternoon, min 13°C on Thu night). Mainly strong winds.

Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
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)
0.1
SW
7
0.1
SW
7
0.4
SW
3
0.4
WSW
5
0.4
SW
5
0.9
SW
4
0.7
SW
6
0.6
WSW
6
0.9
WSW
4
1.5
WSW
5
1.6
SW
6
1.4
WSW
5
0.7
SW
6
0.5
SW
6
0.1
SW
14
0.1
SW
14
0.5
NW
4
0.1
W
16
0.1
SW
15
0.1
SW
15
0.1
SW
15
Wave Graph
Metric surfscale
Energy kJ
2
2
3
9
7
27
37
22
29
121
154
117
40
21
8
7
9
7
9
9
8
Wind (km/h)
0
SSE
10
SW
10
SW
15
NW
5
W
30
WSW
20
NW
15
SW
30
W
35
WSW
40
SW
30
W
35
NW
35
N
15
NNW
25
NNW
30
NNW
20
N
20
NNW
30
NNW
20
N
Wind State
glassy
cross-on
cross-on
cross-off
cross
cross-on
cross-off
cross-on
cross
cross
cross-on
cross
cross-off
off
cross-off
cross-off
cross-off
off
off
cross-off
off
High Tide
11:16AM4.24m
11:35PM4.56m
11:55AM4.03m
00:15AM4.20m
12:35PM3.75m
00:56AM3.78m
1:17PM3.43m
1:41AM3.34m
2:05PM3.11m
2:38AM2.96m
3:15PM2.85m
4:06AM2.73m
4:55PM2.79m
Low Tide
6:16PM0.37m
6:46AM0.37m
6:49PM0.61m
7:18AM0.70m
7:22PM0.88m
7:50AM1.04m
7:58PM1.17m
8:25AM1.34m
8:46PM1.43m
9:17AM1.59m
10:04PM1.63m
10:53AM1.71m
00:05AM1.62m
part cloud
part cloud
cloud
cloud
part cloud
light rain
cloud
cloud
rain showers
light rain
rain showers
rain showers
rain showers
part cloud
rain showers
part cloud
clear
clear
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:00
6:01
6:03
6:05
6:07
6:07
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:43
8:40
8:38
8:37
8:34
8:31
8:30
 mm
3
1
1
1
3
2
2
Temp °C
15
16
17
16
16
18
16
18
18
15
17
17
16
15
15
14
15
13
13
15
14
Feels °C
14
14
17
15
16
16
13
15
14
8
12
12
9
8
12
9
9
7
8
9
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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