
Surf Forecasts:
Porth Ceriad surf forecast from 5 Sep 2026:
- Most powerful swell: Monday 7 Sep, 7PM (local time) - 7ft (2.2m), 7s period, SW swell with 447 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 2.2m 7s and forecast to arrive on Monday (Sep 07) 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 1.7m 6s period and expected on Wednesday (Sep 09) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Mon 7th Sep) | 7ft (2.2m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s coming up for Porth Ceriad over the next couple of weeks.
First thing you need to know: it’s a rough stretch ahead. For a spot that’s exposed to the southwest, we’re just not getting the quality we need. The wind is the main problem—it’s onshore or cross-shore for most of the period, and the swell is small and weak. The water temp is about what you’d expect for this time of year, nothing weird there.
We kick off Saturday the 5th of September with a weak 3ft swell from the WSW, but the wind is a cross-shore breeze at 15 km/h, and the combined energy is a paltry 75. It’s poor. Sunday the 6th is even worse—onshore winds at 30 km/h and lumpy surf. Monday the 7th sees a bit more size, 4ft in the morning, but it’s cross-on and choppy. By Monday afternoon the wind cranks up to 45 km/h and the swell hits 6ft, but it’s a total mess. This is a classic case of big, windy, ugly surf. If you’re into kite surfing, this might look interesting, but for a paddle surfer, it’s a write-off.
Tuesday the 8th is the same story—6ft of messy cross-shore slop with combined energy in the 270–280 range, but the wind is too strong and the quality is zero. Wednesday the 9th morning gives us a brief moment of clean conditions with a cross-offshore breeze, but the swell drops to 3ft. It’s ridable for a beginner, but nothing to get excited about. Thursday the 10th sees a 5ft swell with a 7-second period, but the wind is cross-shore and cross-on all day, making it choppy and lumpy.
From Friday the 11th onwards, it’s flat or near flat. We get a few days of tiny, weak waves—0.7ft, 1ft, 0.3ft—with some clean conditions, but honestly, the swell is barely there. The combined energy is in the single digits. This is a dead period. There’s a gap of several days with no real surf on offer. The 11th through the 20th of September is basically a drought.
There is no standout here. Not a single session you’d want to paddle out for. The only break in the picture is Porth Ceriad itself, and it’s a beginner-friendly, fairly consistent spot, but it needs a clean, decent swell to work. It’s not getting that. The best we can say is that a few mornings have clean wind, but the waves are just too small to matter.
Look, this is a blank run. It happens. Forecasts can change, so don’t give up hope, but as it stands, leave your board in the car for the next two weeks.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Sat night. Warm (max 20°C on Sun afternoon, min 14°C on Fri night). Winds increasing (light winds from the WSW on Sat morning, strong winds from the SW by Mon afternoon). | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Wed night. Very mild (max 17°C on Thu morning, min 13°C on Mon night). Winds decreasing (strong winds from the WSW on Tue morning, light winds from the WSW by Wed night). | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | WSW 6 | SW 6 | SSW 4 | SW 5 | SW 6 | SW 6 | WSW 5 | SW 6 | WSW 7 | WSW 6 | WSW 6 | W 6 | WSW 6 | SW 6 | WSW 5 | SW 7 | SW 7 | WSW 5 | W 5 | WSW 8 | WSW 6 |
Wave Graph | |||||||||||||||||||||
49 | 17 | 13 | 25 | 50 | 96 | 61 | 216 | 241 | 281 | 271 | 0 | 43 | 38 | 48 | 192 | 93 | 33 | 0 | 7 | 20 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-on | cross-on | cross | cross-on | cross | cross-off | cross-off | cross-off |
High Tide | 3:01PM3.24m | 3:49AM3.13m | 4:32PM3.23m | 5:21AM3.19m | 5:54PM3.50m | 6:32AM3.46m | 6:56PM3.92m | 7:27AM3.80m | 7:46PM4.33m | 8:12AM4.10m | 8:30PM4.65m | 8:54AM4.33m | 9:11PM4.83m | ||||||||
Low Tide | 9:45AM1.42m | 10:41PM1.35m | 11:30AM1.41m | 00:19AM1.15m | 12:52PM1.16m | 1:31AM0.77m | 1:53PM0.82m | 2:25AM0.38m | 2:41PM0.50m | 3:11AM0.08m | 3:23PM0.27m | 3:51AM-0.09m | 4:02PM0.14m | ||||||||
6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | |
— | 7:58 | — | — | 7:55 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — | — | 7:45 | — | — | 7:44 | — | |
mm | — | — | 3 | — | — | — | — | 3 | 1 | — | — | — | — | — | 5 | — | — | — | — | — | — |
Temp °C | 14 | 15 | 15 | 19 | 20 | 17 | 15 | 15 | 16 | 15 | 16 | 15 | 15 | 15 | 16 | 17 | 17 | 17 | 14 | 16 | 15 |
Feels °C | 12 | 12 | 11 | 14 | 15 | 13 | 10 | 7 | 10 | 7 | 9 | 7 | 9 | 9 | 13 | 13 | 12 | 13 | 6 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | NW 5 | NW 4 | WSW 6 | SW 5 | W 13 | W 16 | — | — | — | — | — | — | WSW 6 | NW 5 | NNW 4 | — | WSW 7 | WSW 7 | — | WSW 8 | WSW 6 |
19 | 7 | 4 | 25 | 3 | 5 | — | — | — | — | — | — | 43 | 22 | 2 | — | 79 | 33 | — | 7 | 20 | |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SW 13 | — | W 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 8 |
7 | 7 | 7 | 7 | — | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | |
Swell 3 Height (m) Direction Period (s) | — | SW 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 6 | SW 6 | SSW 4 | SSE 3 | SW 6 | SW 6 | WSW 5 | SW 6 | WSW 7 | WSW 6 | WSW 6 | W 6 | NW 5 | SW 6 | WSW 5 | SW 7 | SW 7 | WSW 5 | W 5 | W 5 | NW 5 |
49 | 17 | 13 | 4 | 50 | 96 | 61 | 216 | 241 | 281 | 271 | 178 | 65 | 38 | 48 | 192 | 93 | 30 | 66 | 55 | 66 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 236 | 132 | 184 | 393 | 200 | 355 | 272 | 120 | 272 | 460 | 549 | 354 | 317 | 298 | 3 | 460 | 241 | 291 | 373 | 129 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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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.










