Surf Forecasts:
Porth Ceriad surf forecast from 3 Sep 2026:
- Best quality surf: Saturday 5 Sep, 7AM (local time) - 2.5ft (0.7m), 6s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 1PM (local time) - 3.5ft (1.1m), 12s period, SW swell with 367 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 7AM (local time) - 2.5ft (0.7m), 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 Saturday (Sep 05) at 7AM. The primary swell is predicted to be 0.7m and 6s period with a secondary swell of 0.1m and 14s. 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 1.1m 12s and forecast to arrive on Monday (Sep 07) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s period and expected on Tuesday (Sep 08) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 5th Sep) | 2.5ft (0.7m) 6s |
| Best Surf | 7AM (Sat 5th Sep) | 2.5ft (0.7m) 6s |
| Most Powerful | 1PM (Mon 7th Sep) | 3.5ft (1.1m) 12s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, this is Rusty. I’m looking at Porth Ceriad for the next 16 days, and I’m gonna level with you: it’s a pretty sorry stretch of surf. Nothing here is going to get your heart racing.
Right from the start on Thursday the 3rd, it’s onshore and messy. We’ve got a 2 ft swell from the SW on Thursday afternoon, but a fresh cross-onshore wind at 22 mph is making it lumpy. Friday the 4th is also cross-shore and choppy with similar size. The pattern holds through the weekend and into the start of the next week: lots of wind, small or onshore swell, not a clean wave to be found.
There’s a real dry spell from the 3rd all the way until late on Thursday the 10th. That afternoon we get a 7 ft SW swell with a 7-second period and a combined energy of 371 (moderate energy), but the wind is light and cross-shore, making it marginal and tide-dependent. Not the one to chase.
Your best bet, and I mean the only real chance, is Friday the 11th. Both the morning and afternoon sessions see a fresh offshore wind from the N and NNW at 19 mph, giving clean conditions. The morning has a 4 ft SW swell (7-second period, 189 energy) and the afternoon has a 4 ft swell (8-second period, 142 energy). For a beach break like Porth Ceriad, that offshore wind is a gift, and that’s the highlight of the whole 16 days. The waves are short-period, but they’ll be clean and workable for a beginner. After Friday, the swell vanishes into tiny foam balls – nothing above 2 ft for the rest of the forecast, even if the wind goes glassy on the 14th and 15th.
So no real standouts here. Water temp is average for this time of year. If you’re itching to paddle, make it Friday the 11th. Otherwise, it's a waiting game. Forecasts change, so don’t write it off completely.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Thu night. Very mild (max 18°C on Wed night, min 14°C on Fri morning). Winds decreasing (strong winds from the SW on Wed night, light winds from the SW by Sat morning). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Mon afternoon. Warm (max 21°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the S on Sat night, strong winds from the SW by Mon afternoon). | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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) | SW 7 | SW 6 | SW 6 | WSW 5 | SW 6 | W 5 | WSW 6 | SW 6 | SW 4 | S 5 | SW 6 | SW 5 | WSW 13 | SW 6 | WSW 7 | W 6 | WSW 9 | WSW 6 | WSW 6 | SW 7 | SW 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 156 | 169 | 167 | 113 | 123 | 83 | 26 | 17 | 7 | 34 | 85 | 47 | 286 | 172 | 273 | 0 | 86 | 24 | 3 | 2 | 47 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross | cross-off | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross | cross-on | cross | cross | cross | cross-off | cross-off | cross-on | cross-on |
High Tide | 12:53PM3.82m | 1:20AM3.76m | 1:48PM3.50m | 2:24AM3.37m | 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 | ||||||||
Low Tide | 7:21AM0.92m | 7:31PM1.04m | 8:15AM1.21m | 8:50PM1.27m | 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 | |||||||
 | |  |  | |  | |  |  | | | | |  | | | | | | |  | |
 | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — |
 | — | 8:02 | — | — | 8:00 | — | — | 7:58 | — | — | 7:55 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — |
mm | — | — | 9 | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | 3 |
Temp °C | 18 | 17 | 17 | 15 | 17 | 16 | 14 | 15 | 16 | 19 | 21 | 18 | 15 | 16 | 14 | 15 | 16 | 14 | 14 | 15 | 15 |
Feels °C | 13 | 12 | 11 | 8 | 11 | 10 | 14 | 12 | 12 | 14 | 17 | 14 | 10 | 7 | 5 | 6 | 8 | 6 | 9 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | — | — | SW 14 | — | NW 5 | SW 8 | WSW 6 | NW 4 | SW 4 | SW 13 | SW 13 | SW 12 | NW 4 | NW 4 | — | — | WSW 9 | WSW 6 | WSW 6 | SW 7 | — |
| kJ | — | — | 8 | — | 12 | 15 | 26 | 3 | 4 | 7 | 6 | 6 | 12 | 1 | — | — | 86 | 24 | 3 | 2 | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | SW 14 | NW 5 | SW 13 | WSW 6 | W 13 | — | W 16 | WSW 13 | — | — | — | — | SW 8 | SW 8 | — | — |
| kJ | — | — | — | — | — | 8 | 14 | 7 | 4 | 3 | — | 5 | 16 | — | — | — | — | 16 | 2 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 14 | SW 8 | SW 13 | W 8 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 7 | 2 | 7 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 7 | SW 6 | SW 6 | WSW 5 | SW 6 | W 5 | — | SW 6 | SSE 2 | S 5 | SW 6 | SW 5 | WSW 13 | SW 6 | WSW 7 | W 6 | W 6 | NW 5 | NW 5 | WNW 5 | SW 5 |
| kJ | 156 | 169 | 167 | 113 | 123 | 83 | — | 17 | 1 | 34 | 85 | 47 | 286 | 172 | 273 | 231 | 210 | 85 | 57 | 28 | 47 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 252 | 460 | 141 | 299 | 494 | 126 | 3 | 247 | 125 | 363 | 324 | 262 | 298 | 638 | 120 | 785 | 460 | 291 | 277 | 298 | 296 |
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.
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