Porth Ceriad Surf Break

Lat Long: 52.79° N 4.51° W

Porth Ceriad Surf Forecast and Surf Report

Issued: 6 pm 27 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 27 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 4PM (local time) - 4ft (1.2m), 5s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 3 Sep, 7AM (local time) - 6ft (1.8m), 6s period, SW swell with 247 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 1 Sep, 4PM (local time) - 4ft (1.2m), 5s 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 Tuesday (Sep 01) at 4PM. The primary swell is predicted to be 1.2m and 5s period with a secondary swell of 0.3m 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 1.8m 6s and forecast to arrive on Thursday (Sep 03) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Saturday (Aug 29) at 10PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 4PM (Tue 1st Sep)4ft (1.2m) 5s
Best Surf 4PM (Tue 1st Sep)4ft (1.2m) 5s
Most Powerful 7AM (Thu 3rd Sep)6ft (1.8m) 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 coming up for Porth Ceriad. I’ve got to be straight with you—this is a tough one. The whole 16-day window is basically a write-off for any kind of decent surf. There isn’t a single standout session, and honestly, most of it looks pretty grim. You’re looking at a long stretch of poor surf conditions, with only a couple of brief moments that are even worth mentioning, and even then, it’s not great.

The water temperature is sitting at about 65°, which is a notable 5° warmer than usual for this time of year. That’s a bit unusual, so you’ll be surfing in warmer water than you’d expect, but that’s about the only positive.

We start off with a real flat spell. Thursday the 27th and Friday the 28th see tiny, weak swell—only about 0.3 ft to 2 ft—with some cross-off winds that keep things clean but totally unrideable. The combined swell energy is negligible, barely reaching double digits (12). There’s just nothing to work with.

Saturday the 29th and Sunday the 30th are a complete mess. The wind swings onshore and gets strong, up to 22 mph, making the surface lumpy and choppy. Swell picks up a touch to 2 ft to 3 ft, but it’s short-period (6-8 seconds) and weak energy-wise, maxing out at 132 on the Sunday afternoon. It’s just not worth getting wet.

Monday the 31st is the closest we get to something half-decent. The morning shows a 4 ft swell from the WSW, with a 9-second period and cross-off winds from the WNW at 16 mph. The combined energy jumps to 459, which is the highest we’ll see, but the wave comment still says “poor surf conditions.” It’s clean, but it’s just not coming together for a proper wave. The afternoon drops back down.

From there, it’s a downward spiral. Tuesday the 1st of September and Wednesday the 2nd are small and choppy, with onshore winds. Thursday the 3rd sees a 6 ft swell, but it’s cross-shore with a cross-chop and only a 7-second period, so it’s messy and not surfable.

The only glimmer comes on Saturday the 5th of September. The morning has a 7 ft swell from the WSW with a 7-second period and light cross-shore winds. The combined energy is 428, and the wave comment is “marginal surf forecast or questionable tide conditions.” It gets a score of 1 out of 10, which is the highest in the whole forecast. For a beginner-friendly spot like Porth Ceriad, 7 ft is getting too big, and with that short period, it’s going to be a bit of a washing machine. But if you’re an experienced surfer and you’re desperate, it might offer a few lumpy, powerful lines, especially if the tide lines up.

After that, it’s back to small, weak, and windy for the rest of the second week. Sunday the 6th has some offshore wind (N, 6 mph) but only 2 ft of swell, and by Monday the 7th, it’s onshore and messy again. The rest of the period is more of the same—small swell, strong winds, and clean but tiny conditions that won’t get you anywhere.

So, there you have it. A blank run like this is more normal for this area, but it doesn’t mean it stays poor forever. Forecasts can change, so keep an eye out, but for now, I’d say leave the board at home.

Rusty.

Short Range Forecast

Heavy rain (total 20mm), heaviest during Sat morning. Very mild (max 18°C on Thu afternoon, min 15°C on Sat night). Winds increasing (light winds from the SSW on Thu afternoon, fresh winds from the SE by Sat morning).

Days 5-7 Weather Summary

Light rain (total 6mm), mostly falling on Sun afternoon. Very mild (max 17°C on Sun afternoon, min 14°C on Mon morning). Winds decreasing (fresh winds from the WSW on Mon night, light winds from the WSW by Wed morning).

Thu
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
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
1
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)
0.1
W
12
0.1
W
12
0.3
SW
6
0.5
SW
6
1.3
SW
5
0.8
SW
6
0.8
SW
6
1.1
SW
9
0.7
SW
8
0.5
SW
8
0.8
SW
7
0.9
SW
8
0.7
SW
9
0.8
WSW
8
0.9
WSW
5
1.2
SW
5
0.6
SW
6
0.4
SW
6
0.1
W
16
1.1
SW
5
Wave Graph
Metric surfscale
Energy kJ
3
4
6
19
96
54
56
225
74
33
65
100
81
82
35
73
25
11
5
49
Wind (km/h)
15
ENE
15
SW
20
WNW
15
WSW
30
SSW
35
SE
20
SSW
25
WNW
25
S
30
SW
10
SW
25
NW
15
WSW
30
SW
30
WSW
10
NW
10
N
10
NW
10
SSW
30
SSW
Wind State
cross-off
cross-on
cross-off
cross
cross-on
cross-on
on
cross-off
on
cross-on
cross-on
cross-off
cross
cross-on
cross
cross-off
off
cross-off
on
cross-on
High Tide
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
12:07PM4.09m
00:30AM4.13m
Low Tide
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
6:44AM0.65m
6:48PM0.80m
light rain
rain showers
light rain
clear
rain showers
rain showers
part cloud
part cloud
rain showers
rain showers
rain showers
part cloud
cloud
part cloud
rain showers
part cloud
part cloud
clear
part cloud
rain showers
<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
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:19
8:16
8:14
8:12
8:09
8:07
8:05
 mm
4
1
3
3
8
1
3
2
1
1
Temp °C
18
17
16
17
17
17
17
16
18
17
16
15
16
16
16
17
17
14
16
17
Feels °C
18
16
14
16
14
12
14
14
15
13
14
11
11
10
13
16
15
12
14
13
  • Map Icons:
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  • 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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