Porth Ceriad Surf Break

Lat Long: 52.79° N 4.51° W

Porth Ceriad Surf Forecast and Surf Report

Issued: 6 pm 26 Aug 2026 (local time)

Forecast update in  hr  min

Today's Porth Ceriad sea temperature is
18.6°C
2.8° 

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: Tuesday 1 Sep, 7PM (local time) - 2.5ft (0.8m), 6s period, SW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 2 Sep, 10PM (local time) - 6.5ft (2.0m), 6s period, SW swell with 297 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 1 Sep, 7PM (local time) - 2.5ft (0.8m), 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 Tuesday (Sep 01) at 7PM. The primary swell is predicted to be 0.8m and 6s period with a secondary swell of 0.6m and 5s. 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 2.0m 6s and forecast to arrive on Wednesday (Sep 02) at 10PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Monday (Aug 31) at 1PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Tue 1st Sep)2.5ft (0.8m) 6s
Best Surf 7PM (Tue 1st Sep)2.5ft (0.8m) 6s
Most Powerful10PM (Wed 2nd Sep)6.5ft (2.0m) 6s

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


The Lowdown

Alright, let’s get real about this stretch. I’m lookin’ at the charts for Porth Ceriad and, honestly, it’s a tough one. For a spot that’s usually exposed to the southwest, we’re in for a lot of waiting around. The first proper surfable pulse doesn’t show up until the very end of the first week, but even then, conditions are a mess.

We kick off Wednesday the 26th of August with barely a ripple—0.7 ft of swell from the SSW, and it’s just a weak, short-period thing. The water’s sitting at 66°F, which is a solid 5°F warmer than normal for this time of year, so that’s a nice surprise if you’re just having a swim. But for surfing? Forget it. That tiny, weak energy (9) and the cross-off breeze aren’t doing us any favours. Thursday and Friday are total washouts with even smaller waves and poor wind, so don’t bother padding up.

We get a bit of a pulse into the weekend. Saturday the 29th morning is a write-off—22 mph cross-onshore winds and chop, but the afternoon cleans up a bit with a lighter cross-off breeze and a tiny 2 ft swell. Still, with only 30 energy and a 6-second period, it’s not worth the drive. Sunday the 30th brings onshore winds and rain, so it’s ugly.

The first real chance comes Monday the 31st of August. We’ve got 4 ft of SW swell, an 8-second period, and moderate energy (166). The morning shows a cross-off WNW breeze at 19 mph, which should keep it reasonably clean. It’s not a standout, but it’s the best we’ve seen so far. The afternoon gets lumpy with a cross-shore wind, so aim for the early session.

Tuesday the 1st of September sees a bump in size—5 ft from the W—but the period drops to 6 seconds, which is pure wind swell. The morning is clean with a cross-off breeze, but that short period means the waves will be fat and crumbly, not really offering much shape. The energy is moderate (154). This is a beginner-friendly size, but don’t expect anything special.

Then we hit a weird gap. Wednesday the 2nd of September is glassy calm, with a 0.3 ft, 16-second groundswell. That’s an incredibly long period, but there’s no height to ride. It’s the kind of day you just sit and watch the ocean breathe. Thursday the 3rd brings strong winds and messy surf, so no go.

The next real window is Saturday the 5th of September. This one is a bit of a beast. We’re looking at 8 ft of SW swell with an 8-second period, and the combined energy jumps to 703—that’s strong, punchy wave energy. The wind is light and variable from the south, so it’s clean. But listen, 8 ft is solid and only for experienced surfers. The period is short, so those waves will be steep and dumpy, more suited to reef breaks than a beach. At Porth Ceriad, a beach break, this could be a close-out mess. The water temp is unknown for this date, but given the earlier anomaly, it’s likely still warm. The Sunday the 6th of September holds similar size (6 ft) but with a cross-onshore wind, so Saturday morning is the target.

After that, the swell drops off and the wind goes bad again. The rest of the second week is a write-off: tiny waves, onshore winds, and a lot of chop. The 8th of September has a nice offshore breeze from the NNW, but the swell is only 2 ft, so it’s a clean, tiny day for a longboard or a beginner.

The standout is the morning of Saturday the 5th of September. If you’re an experienced surfer, that’s the one to circle. 8 ft of SW swell, strong energy (703), and clean conditions. But it’s a short-period swell, so expect it to be a bit dumpy and punchy. For the intermediates, the morning of Monday the 31st of August is your best bet—4 ft, clean, and manageable.

Overall, it’s a period of waiting, with only a couple of windows that are worth your time. The first week is mostly a bust, and the second week has one solid pulse for the brave. The rest is flat or blown out. Keep an eye on the forecasts, because right now, it’s a lean stretch.

Rusty

Short Range Forecast

Heavy rain (total 48mm), heaviest during Thu morning. Warm (max 22°C on Wed afternoon, min 16°C on Thu morning). Winds increasing (light winds from the NE on Wed afternoon, fresh winds from the SE by Sat morning).

Days 5-7 Weather Summary

Heavy rain (total 30mm), heaviest during Sat afternoon. Very mild (max 17°C on Sat afternoon, min 14°C on Mon night). Mainly strong winds.

Wed
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
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
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
0.1
W
12
0.1
SW
12
0.1
SW
12
0.5
SW
3
0.9
SSW
6
1
SW
7
1.1
SW
5
1
SW
6
0.6
SW
6
1.1
SW
10
0.7
SW
9
0.9
SW
8
1.1
SW
7
1.1
SW
8
1.1
SW
9
1.5
WSW
6
1.6
W
6
1.2
W
5
0.8
W
4
Wave Graph
Metric surfscale
Energy kJ
6
3
6
6
5
63
96
65
81
30
217
84
102
115
166
190
175
154
82
21
Wind (km/h)
10
NE
20
E
15
ENE
10
ESE
20
SW
15
W
20
SW
30
SW
35
SE
15
NNE
25
WNW
25
SSW
30
S
20
SW
30
WNW
30
WSW
35
WSW
30
WNW
20
WSW
0
NNE
Wind State
cross-off
cross
cross-off
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-off
cross-off
on
on
cross-on
cross-off
cross
cross
cross-off
cross
glassy
High Tide
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
3:27AM0.54m
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
part cloud
rain showers
heavy rain
heavy rain
rain showers
mod rain
rain showers
rain showers
mod rain
mod rain
rain showers
rain showers
mod rain
rain showers
cloud
cloud
rain showers
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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
1
13
12
4
7
1
2
8
9
1
1
9
2
8
Temp °C
22
21
17
17
17
16
17
17
17
17
16
17
16
16
15
16
16
14
16
15
Feels °C
21
19
16
17
16
15
15
13
12
16
12
14
11
13
10
10
10
8
12
13
  • 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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