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Surf Forecasts:
Llandanwg surfForecast / Wales – Mid / UK
16 Day Weather and Surf, issued 6 pm Sunday 31 May 2026 BSTForecast update in hr min s Forecast update imminent
Llandanwg surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Llandanwg sea temperature is
14.8° C
(Which is 3.1°C warmer than normal for this time of year)Llandanwg surf forecast from 31 May 2026:
- Most powerful swell: Thursday 4 Jun, 4AM (local time) - 7ft (2.2m), 8s period, WSW swell with 620 kJ wave energy.
Best Forecast Surf Conditions for Llandanwg this week:
The most powerful waves expected at Llandanwg in the next 16 days are 2.2m 8s and forecast to arrive on Thursday (Jun 04) at 4AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Thu 4th Jun) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Llandanwg over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 23mm), heaviest during Mon morning. Very mild (max 15°C on Sun afternoon, min 12°C on Tue night). Winds increasing (light winds from the WNW on Tue morning, fresh winds from the SW by Wed morning). | Days 5-7 Weather SummaryHeavy rain (total 25mm), heaviest during Wed afternoon. Very mild (max 13°C on Wed afternoon, min 10°C on Thu night). Winds decreasing (strong winds from the SW on Thu morning, light winds from the SSE by Fri night). | ||||||||||||||||||||
Sun 31 | Monday 1 | Tuesday 2 | Wednesday 3 | Thursday 4 | Friday 5 | Saturday 6 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
WSW 11 | WSW 11 | SW 5 | SW 6 | SW 6 | WSW 7 | SW 7 | WSW 9 | SW 5 | SW 7 | WSW 8 | WSW 8 | WSW 12 | W 5 | W 5 | WSW 4 | SW 4 | SSW 4 | SW 5 | SW 8 | WSW 9 | |
113 | 41 | 49 | 44 | 45 | 29 | 21 | 46 | 59 | 429 | 558 | 508 | 560 | 154 | 85 | 28 | 16 | 23 | 60 | 184 | 53 | |
Wind (km/h) | |||||||||||||||||||||
on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | on | |
High Tide | 9:07PM4.04m | 9:26AM3.89m | 9:42PM4.05m | 10:01AM3.82m | 10:17PM4.01m | 10:36AM3.71m | 10:53PM3.93m | 11:11AM3.57m | 11:30PM3.83m | 11:49AM3.41m | 00:10AM3.70m | 12:31PM3.26m | 00:54AM3.58m | ||||||||
Low Tide | 4:10AM0.74m | 4:19PM0.85m | 4:46AM0.76m | 4:54PM0.89m | 5:25AM0.81m | 5:32PM0.96m | 6:07AM0.90m | 6:11PM1.04m | 6:50AM1.00m | 6:52PM1.14m | 7:36AM1.08m | 7:37PM1.23m | 8:24AM1.13m | ||||||||
 |  |  | |  |  | | |  |  | | | | | | | | | | | | |
 | — | — | 4:58 | — | — | 4:56 | — | — | 4:56 | — | — | 4:56 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 |
 | — | 9:29 | — | — | 9:30 | — | — | 9:30 | — | — | 9:31 | — | — | 9:34 | — | — | 9:35 | — | — | 9:36 | 9:37 |
— | 2 | 6 | 7 | 3 | — | — | 1 | 4 | 4 | 5 | 3 | 2 | 4 | — | — | 4 | 3 | — | 3 | — | |
Temp °C | 15 | 13 | 14 | 15 | 14 | 14 | 15 | 14 | 14 | 13 | 13 | 12 | 11 | 12 | 12 | 12 | 11 | 12 | 14 | 13 | 14 |
12 | 11 | 12 | 13 | 12 | 12 | 12 | 13 | 9 | 7 | 7 | 5 | 3 | 7 | 6 | 6 | 7 | 7 | 9 | 9 | 10 | |
Swell 1 Height (m) Direction Period (s) | — | WSW 11 | WSW 11 | WSW 10 | SW 10 | WSW 7 | SW 7 | WSW 9 | NW 4 | — | — | — | — | — | — | NW 5 | WSW 7 | W 13 | W 13 | SW 8 | WSW 9 |
 kJ | — | 24 | 23 | 11 | 4 | 29 | 21 | 46 | 1 | — | — | — | — | — | — | 4 | 5 | 3 | 3 | 184 | 53 |
Swell 2 Height (m) Direction Period (s) | — | WSW 11 | WSW 11 | W 14 | W 14 | W 13 | W 13 | — | — | — | — | — | — | — | — | — | SW 13 | W 12 | — | — | W 14 |
| kJ | — | 41 | 23 | 4 | 4 | 3 | 3 | — | — | — | — | — | — | — | — | — | 6 | 3 | — | — | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 14 | — | — | — | — | — | — | — | — | — | — | — | — | SW 9 | — | — | — | — |
| kJ | — | — | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 11 | SW 5 | SW 5 | SW 6 | SW 6 | — | — | WSW 4 | SW 5 | SW 7 | WSW 8 | WSW 8 | WSW 12 | W 5 | W 5 | WSW 4 | SW 4 | SSW 4 | SW 5 | — | — |
| kJ | 113 | 31 | 49 | 44 | 45 | — | — | 10 | 59 | 429 | 558 | 508 | 560 | 154 | 85 | 28 | 16 | 23 | 60 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 277 | 60 | 179 | 205 | 135 | 25 | 287 | 25 | 330 | 306 | 330 | 367 | 370 | 462 | 287 | 277 | 179 | 262 | 276 | 205 | 262 |
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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