Surf Forecasts:
Llandanwg surf forecast from 15 Nov 2026:
- Best quality surf: Thursday 19 Nov, 3AM (local time) - 3.5ft (1.1m), 16s period, WSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 17 Nov, 12PM (local time) - 10ft (3.0m), 10s period, WSW swell with 1,455 kJ wave energy.
- Next surfable swell (1★+): Sunday 15 Nov, 12PM (local time) - 2.5ft (0.8m), 8s period with SW swell.
Best Forecast Surf Conditions for Llandanwg this week:
The surf forecast for Llandanwg over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Nov 15) at 12PM. The primary swell is predicted to be 0.8m and 8s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Llandanwg in the next 16 days are 3.0m 10s and forecast to arrive on Tuesday (Nov 17) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Nov 17) at 12AM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Sun 15th Nov) | 2.5ft (0.8m) 8s |
| Best Surf | 3AM (Thu 19th Nov) | 3.5ft (1.1m) 16s |
| Most Powerful | 12PM (Tue 17th Nov) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Llandanwg over the next 16 days.
Short Range ForecastHeavy rain (total 35mm), heaviest during Mon night. Very mild (max 11°C on Tue afternoon, min 5°C on Mon afternoon). Winds increasing (calm on Sun morning, strong winds from the WSW by Tue morning). | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Wed afternoon. Very mild (max 11°C on Wed morning, min 4°C on Fri night). Winds decreasing (fresh winds from the E on Thu morning, calm by Fri afternoon). | ||||||||||||||||||||
Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | |||||||||||||||
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 8 | NW 6 | SW 10 | WSW 9 | WSW 9 | WSW 9 | WSW 10 | WSW 12 | WSW 12 | WSW 15 | WSW 16 | WSW 15 | WSW 14 | WSW 16 | WSW 13 | WSW 12 | WSW 11 | SW 10 | SSW 7 | W 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 54 | 61 | 136 | 47 | 33 | 7 | 977 | 1420 | 872 | 330 | 766 | 620 | 405 | 299 | 291 | 147 | 90 | 44 | 35 | 47 | 381 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross | cross | cross-off | cross-off | cross-on | on | on | on | on | on | cross-off | cross-off | off | off | glassy | cross-off | cross-off | on | cross-on |
High Tide | 11:12AM3.51m | 11:34PM3.07m | 11:57AM3.28m | 00:25AM2.84m | 12:55PM3.11m | 1:35AM2.72m | 2:09PM3.05m | 3:03AM2.79m | 3:27PM3.17m | 4:13AM3.04m | 4:28PM3.42m | 5:04AM3.39m | 5:19PM3.74m | ||||||||
Low Tide | 6:31PM1.28m | 6:35AM1.45m | 7:32PM1.38m | 7:38AM1.53m | 8:35PM1.38m | 8:45AM1.54m | 9:37PM1.29m | 9:51AM1.45m | 10:36PM1.11m | 10:52AM1.28m | 11:29PM0.89m | 11:47AM1.05m | 00:18AM0.67m | ||||||||
 | |  |  |  |  | | |  | | |  | | |  |  | |  |  | | | |
 | 7:37 | — | — | 7:39 | — | — | 7:41 | — | — | 7:43 | — | — | 7:45 | — | — | 7:47 | — | — | 7:48 | — | — |
 | — | 4:22 | — | — | 4:21 | — | — | 4:20 | — | — | 4:17 | — | — | 4:16 | — | — | 4:15 | — | — | 4:14 | — |
mm | 1 | 2 | — | — | — | 18 | 4 | 4 | 6 | 3 | 5 | 6 | — | — | — | — | — | — | 10 | — | 4 |
Temp °C | 9 | 9 | 7 | 7 | 7 | 10 | 10 | 11 | 10 | 11 | 11 | 10 | 7 | 7 | 6 | 7 | 8 | 5 | 6 | 10 | 9 |
Feels °C | 7 | 7 | -1 | 3 | 4 | 5 | 0 | 6 | 5 | 8 | 7 | 7 | 1 | 0 | -1 | 4 | 5 | 2 | 2 | 3 | 1 |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 8 | WSW 11 | SW 10 | WNW 4 | WSW 9 | — | — | — | WSW 12 | WSW 15 | WSW 16 | WSW 15 | WSW 14 | WSW 16 | WSW 13 | WSW 12 | WSW 11 | SW 10 | WSW 9 | WSW 8 |
| kJ | 54 | 61 | 47 | 47 | 7 | 7 | — | — | — | 330 | 766 | 620 | 405 | 299 | 291 | 147 | 90 | 44 | 35 | 16 | 244 |
Swell 2 Height (m) Direction Period (s) | W 11 | W 11 | — | — | WSW 9 | — | — | — | — | — | NW 7 | — | — | — | — | — | — | — | — | E 3 | — |
| kJ | 2 | 2 | — | — | 33 | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | 1 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | NW 7 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 3 | — | NW 6 | WNW 5 | — | SE 4 | WSW 9 | WSW 10 | WSW 12 | WNW 5 | — | E 3 | ENE 3 | ENE 2 | ENE 3 | — | — | — | E 3 | SSW 7 | W 7 |
| kJ | 1 | — | 136 | 29 | — | 22 | 977 | 1420 | 872 | 14 | — | 1 | 3 | 1 | 1 | — | — | — | 2 | 47 | 381 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 128 | 60 | 217 | 135 | 30 | 532 | 360 | 130 | 128 | 25 | 60 | 10 | 1 | 148 | 10 | 1 | 1 | 45 | 131 | 339 | 287 |
Best forecast wave conditions in Mid Wales | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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