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

Right then, let’s have a look at what we’ve got. To be straight with you, this stretch is looking pretty grim for a proper surf. There’s no real standout session in the whole 16-day window, so we’re going to be waiting a while for anything worth paddling out for. The first couple of weeks are basically a write-off for any decent waves, with a big gap of flat or poor conditions. We’re looking at a long, quiet spell.

The only spot in the frame is Porth Ceriad. It’s a beginner-friendly, exposed break that’s fairly consistent, but that doesn’t mean much when the conditions are this rough. The water temp here is running about 65°, which is a solid 5° warmer than average for this time of year – that's a notable anomaly, and it’ll feel pretty balmy compared to normal.

Right from the start, Tuesday the 25th is a no-go. You’ve got a tiny 0.3 ft SW swell with weak energy (12) and a light cross-off breeze, but it’s just not enough to surf. That flat spell drags on. The first flicker of anything happens on Friday the 28th morning. A 4 ft WSW swell shows up, but it’s short period at 6 seconds and the energy is still weak (106). The wind is cross-off, so it’s clean, but the waves are poor quality. That doesn’t last and it gets messy by the afternoon.

We get a bit more hope on Sunday the 30th morning with a 3 ft SW swell and a 9-second period, giving us moderate energy (125), and the wind is directly onshore. It’s not clean, but it’s the best we’ve seen, and still the “poor surf conditions” tag sticks. All through the rest of August and into early September, it’s just a mess of onshore winds, lumpy chop, and tiny swell. The sessions on the 31st and 1st are blown out completely, with near gale-force winds.

Finally, we get a tiny glimmer on Wednesday the 2nd of September. The morning turns glassy, with a light wind from the SSW and a 2 ft SW swell. The combined energy is weak (43), but it’s clean – glassy conditions at Porth Ceriad. The report says “surfable waves but very ordinary conditions” – this is your best bet, but it’s not a standout, just the least bad window in a very quiet spell. The afternoon goes cross-onshore and choppy again.

After that, it’s back to the same story. Thursday the 3rd sees a big jump in swell height to 7 ft with strong energy (489), but it’s blown out by a near gale. That’s too much for beginners anyway and it’s messy. The pattern repeats: small clean windows on the 4th afternoon with a light offshore, and again on the 6th morning with glassy conditions and a 4 ft swell. But none of it is good quality surf. The last few days swing into bigger, unruly swell over 8 ft (like on the 7th with 10 ft and 1159 energy) but with terrible winds – only for experts, and even then it’d be a struggle.

Honestly, this is a bleak outlook. Porth Ceriad has a few clean, glassy mornings, but the swell is tiny or the quality is just poor. If you’re itching for a paddle, the morning of September 2nd or the morning of September 6th are the only real options, and they’re both just ordinary. For most of the next two weeks, it’s a waiting game.

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
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<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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