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Porth Dinllaen Surf Forecast
/ Wales – Lleyn (14 surf breaks) /
Surf Forecasts:
Porth Dinllaen surfForecast / Wales – Lleyn / UK
12 Day Weather and Surf, issued 5 pm Thursday 04 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Porth Dinllaen surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Porth Dinllaen sea temperature is
10.8° C
(Which is normal for this time of year)Best Forecast Surf Conditions for Porth Dinllaen this week:
The surf forecast for Porth Dinllaen over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Dec 09) at 12AM. The primary swell is predicted to be 1.7m and 11s period with a secondary swell of 0.4m and 18s. Another secondary swell of 0.4m and 18s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Porth Dinllaen in the next 12 days are 3.0m 16s and forecast to arrive on Saturday (Dec 06) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 6s period and expected on Friday (Dec 05) at 3PM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 9th Dec) | 5.5ft (1.7m) 11s |
| Best Surf | 12AM (Tue 9th Dec) | 5.5ft (1.7m) 11s |
| Most Powerful | 3PM (Sat 6th Dec) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Porth Dinllaen over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 24mm), heaviest during Fri afternoon. Very mild (max 11°C on Fri afternoon, min 8°C on Thu afternoon). Mainly gales. | Days 3-6 Weather Summary Heavy rain (total 50mm), heaviest during Mon night. Very mild (max 13°C on Tue afternoon, min 10°C on Sun night). Winds decreasing (fresh winds from the W on Sun afternoon, light winds from the WNW by Mon night). | ||||||||||||||||||||||
Thu 04 | Friday 05 | Saturday 06 | Sunday 07 | Monday 08 | Tuesday 09 | Wednesday 10 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 8 | 9 | 9 | 8 | 9 | 12 | 16 | 7 | 10 | 10 | 6 | 11 | 11 | 11 | 10 | 10 | 12 | 7 | 8 | 7 | 9 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 75 | 124 | 48 | 314 | 1069 | 1527 | 3986 | 561 | 213 | 108 | 194 | 990 | 757 | 659 | 119 | 102 | 3179 | 659 | 856 | 527 | 1242 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | cross- off | off | cross- off | cross | cross | cross- on | off | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | cross- off | cross- on | cross- off | cross- off | ||
High Tide / height (m) | 7:44PM 3.93 | 8:07AM 3.99 | 8:32PM 3.95 | 8:53AM 4.07 | 9:21PM 3.85 | 9:40AM 4.06 | 10:09PM 3.66 | 10:28AM 3.95 | 10:59PM 3.39 | 11:18AM 3.76 | 11:51PM 3.10 | 12:12PM 3.52 | 12:50AM 2.84 | ||||||||||
Low Tide / height (m) | 2:53AM 0.10 | 3:19PM -0.02 | 3:41AM 0.12 | 4:09PM -0.08 | 4:29AM 0.20 | 5:00PM -0.04 | 5:16AM 0.35 | 5:51PM 0.09 | 6:05AM 0.53 | 6:44PM 0.28 | 6:54AM 0.73 | 7:39PM 0.50 | 7:47AM 0.93 | ||||||||||
Thu 04 | Friday 05 | Saturday 06 | Sunday 07 | Monday 08 | Tuesday 09 | Wednesday 10 | |||||||||||||||||
| Sunrise | - | - | 8:12 | - | - | 8:14 | - | - | 8:15 | - | - | 8:15 | - | - | 8:18 | - | - | 8:18 | - | - | 8:19 | ||
| Sunset | 4:04 | - | - | 4:02 | - | - | 4:02 | - | - | 4:01 | - | - | 4:01 | - | - | 4:01 | - | - | 4:00 | - | - | ||
 |  |  |  | | | | | | |  | | |  |  |  |  | |  | | | |||
Rain (mm) | - | 1 | 1 | 8 | 6 | 3 | 2 | 1 | 2 | 2 | - | 2 | 4 | 13 | 14 | 9 | 2 | 4 | 1 | - | 1 | ||
| Temp. °C | 8 | 9 | 9 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 11 | 12 | 12 | 11 | 12 | 13 | 12 | 11 | 10 | 11 | 12 | ||
| Feels °C (?) | 2 | 4 | 0 | 1 | 0 | 4 | 1 | 3 | 5 | 5 | 4 | 5 | 8 | 8 | 8 | 7 | 8 | 4 | 1 | 4 | 2 | ||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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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 Porth Dinllaen 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 Porth Dinllaen Surf forecast
The above surf forecast table for Porth Dinllaen provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Porth Dinllaen can be found by selecting the local surf guide option on the grey menu. Our Porth Dinllaen 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 Dinllaen) 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 Dinllaen 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.
Are you planning a holiday in Lleyn Peninsula? If you are looking for accommodation near Porth Dinllaen, camping, hotels and holiday cottages in Lleyn Peninsula, consider staying in Porthmadog which is 29 km (18 miles) away. Other places in and around Lleyn Peninsula where you can find information about places to rent, and car hire include Anglesey which is 35 km (22 miles) away, Holyhead, Bangor and Llandudno.
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