Surf Forecasts:
Llandanwg surf forecast from 25 Jul 2026:
- Most powerful swell: Sunday 26 Jul, 1PM (local time) - 3.5ft (1.1m), 5s period, W swell with 67 kJ wave energy.
Best Forecast Surf Conditions for Llandanwg this week:
The most powerful waves expected at Llandanwg in the next 16 days are 1.1m 5s and forecast to arrive on Sunday (Jul 26) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Sun 26th Jul) | 3.5ft (1.1m) 5s |
Table - best surf conditions forecast for Llandanwg over the next 16 days.
Short Range ForecastLight rain (total 3mm), mostly falling on Sat afternoon. Very mild (max 19°C on Tue morning, min 14°C on Sun night). Winds increasing (light winds from the SW on Sat afternoon, fresh winds from the WNW by Sun morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Wed morning, min 14°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Sat 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | ||||||||||||||
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 4 | WSW 4 | W 5 | W 5 | WNW 4 | NW 5 | SW 4 | SW 5 | SW 6 | SW 5 | WSW 4 | SW 4 | SW 4 | WSW 5 | WSW 5 | SW 5 | WSW 6 | WSW 6 | SW 5 | WSW 4 |
Wave Graph  | ||||||||||||||||||||
 kJ | 16 | 22 | 60 | 55 | 26 | 8 | 18 | 27 | 8 | 11 | 2 | 1 | 1 | 29 | 17 | 13 | 41 | 14 | 7 | 2 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross | cross | on | on | on | cross-on | cross-on | glassy | glassy | cross-on | cross-on | cross | cross | glassy | glassy | cross | cross-off |
High Tide | 6:26PM3.16m | 6:53AM3.16m | 7:16PM3.38m | 7:38AM3.34m | 7:57PM3.62m | 8:17AM3.52m | 8:34PM3.86m | 8:52AM3.68m | 9:09PM4.07m | 9:25AM3.81m | 9:42PM4.24m | 9:58AM3.91m | 10:15PM4.35m | |||||||
Low Tide | 1:38AM1.36m | 1:57PM1.30m | 2:28AM1.14m | 2:40PM1.09m | 3:08AM0.92m | 3:17PM0.88m | 3:44AM0.71m | 3:51PM0.70m | 4:19AM0.55m | 4:24PM0.58m | 4:54AM0.45m | 4:57PM0.53m | ||||||||
 |  |  | |  |  | |  | | |  |  | | | | | | | | | |
 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — |
 | — | 9:21 | — | — | 9:20 | — | — | 9:17 | — | — | 9:16 | — | — | 9:15 | — | — | 9:14 | — | — | 9:12 |
mm | 1 | 1 | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 16 | 17 | 16 | 15 | 16 | 18 | 19 | 20 | 18 | 23 | 23 | 18 | 18 | 19 | 17 | 19 | 20 | 16 |
Feels °C | 14 | 17 | 10 | 13 | 14 | 12 | 14 | 19 | 19 | 21 | 19 | 24 | 23 | 18 | 18 | 18 | 16 | 18 | 18 | 15 |
Swell 1 Height (m) Direction Period (s) | — | — | — | — | — | NW 5 | NW 4 | — | SW 6 | SW 5 | WSW 4 | SW 4 | SW 4 | — | WSW 5 | NW 4 | WSW 6 | WSW 6 | SW 5 | WSW 4 |
| kJ | — | — | — | — | — | 8 | 1 | — | 8 | 11 | 2 | 1 | 1 | — | 17 | 3 | 41 | 14 | 7 | 2 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 4 | NW 4 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 4 | WSW 4 | W 5 | W 5 | WNW 4 | WSW 5 | SW 4 | SW 5 | SW 4 | — | — | — | — | WSW 5 | NW 4 | SW 5 | — | — | — | — |
| kJ | 16 | 22 | 60 | 55 | 26 | 8 | 18 | 27 | 7 | — | — | — | — | 29 | 5 | 13 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 399 | 367 | 622 | 500 | 293 | 294 | 291 | 285 | 219 | 285 | 263 | 289 | 285 | 226 | 142 | 499 | 25 | 138 | 317 | 129 |
Best forecast wave conditions in Mid Wales | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Llandanwg surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Llandanwg Surf forecast
The above surf forecast table for Llandanwg provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Llandanwg can be found by selecting the local surf guide option on the grey menu. Our Llandanwg 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 (Llandanwg) 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 Llandanwg 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.
Llandanwg is 10 km (6 miles) from Porthmadog. If you plan a holiday in Mid Wales, 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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