Surf Forecasts:
Porth Dinllaen surf forecast from 10 Nov 2026:
- Best quality surf: Tuesday 10 Nov, 6PM (local time) - 2.5ft (0.8m), 11s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 18 Nov, 12PM (local time) - 13ft (4.0m), 16s period, WSW swell with 8,461 kJ wave energy.
- Next surfable swell (1★+): Tuesday 10 Nov, 6PM (local time) - 2.5ft (0.8m), 11s period with SW swell.
Best Forecast Surf Conditions for Porth Dinllaen this week:
The surf forecast for Porth Dinllaen over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Nov 10) at 6PM. The primary swell is predicted to be 0.8m and 11s period with a secondary swell of 0.4m and 15s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Porth Dinllaen in the next 16 days are 4.0m 16s and forecast to arrive on Wednesday (Nov 18) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 5s period and expected on Wednesday (Nov 25) at 6AM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 10th Nov) | 2.5ft (0.8m) 11s |
| Best Surf | 6PM (Tue 10th Nov) | 2.5ft (0.8m) 11s |
| Most Powerful | 12PM (Wed 18th Nov) | 13ft (4.0m) 16s |
Table - best surf conditions forecast for Porth Dinllaen over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 10°C on Wed afternoon, min 7°C on Thu afternoon). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Sun night. Very mild (max 12°C on Sun night, min 7°C on Fri morning). Winds increasing (calm on Fri afternoon, strong winds from the SE by Sun night). | ||||||||||||||||||||
Tuesday 10 | Wednesday 11 | Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | |||||||||||||||
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 11 | SW 12 | SW 13 | WSW 12 | WSW 12 | SW 11 | SW 10 | SW 10 | SW 10 | SW 9 | SW 9 | WSW 12 | SW 11 | SW 11 | SW 11 | SSW 5 | SSW 5 | SW 6 | SW 9 | SW 10 | SW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 104 | 161 | 253 | 264 | 187 | 97 | 54 | 50 | 25 | 13 | 13 | 13 | 18 | 29 | 29 | 33 | 24 | 15 | 52 | 120 | 79 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross-on | off | cross-off | cross-off | off | off | cross-off | off | cross-off | on | cross-on |
High Tide | 9:00PM3.61m | 9:15AM3.70m | 9:35PM3.49m | 9:50AM3.60m | 10:11PM3.31m | 10:25AM3.45m | 10:47PM3.10m | 11:02AM3.27m | 11:25PM2.86m | 11:43AM3.06m | 00:08AM2.63m | 12:32PM2.88m | 1:05AM2.44m | ||||||||
Low Tide | 3:44PM0.34m | 3:57AM0.50m | 4:18PM0.43m | 4:29AM0.65m | 4:54PM0.56m | 5:03AM0.80m | 5:32PM0.73m | 5:40AM0.96m | 6:15PM0.90m | 6:21AM1.11m | 7:04PM1.06m | 7:10AM1.24m | 8:00PM1.16m | ||||||||
 | |  |  |  |  | | | | | |  | | | | | |  |  | | | |
 | 7:31 | — | — | 7:33 | — | — | 7:35 | — | — | 7:37 | — | — | 7:37 | — | — | 7:39 | — | — | 7:41 | — | — |
 | — | 4:31 | — | — | 4:30 | — | — | 4:28 | — | — | 4:27 | — | — | 4:24 | — | — | 4:23 | — | — | 4:22 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 3 | 1 | — |
Temp °C | 8 | 9 | 9 | 9 | 10 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 8 | 9 | 12 | 13 | 12 | 11 |
Feels °C | 4 | 5 | 5 | 5 | 6 | 3 | 0 | 0 | 2 | 4 | 5 | 5 | 2 | 3 | 2 | 3 | 2 | 7 | 9 | 7 | 4 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 12 | SW 13 | WSW 12 | WSW 12 | SW 11 | SW 10 | SW 10 | SW 10 | SW 9 | SW 9 | WSW 8 | SW 11 | SW 11 | SW 10 | SSW 5 | SSW 5 | SW 6 | SW 9 | SW 10 | SW 10 |
| kJ | 104 | 161 | 253 | 264 | 187 | 97 | 54 | 50 | 25 | 13 | 13 | 7 | 18 | 29 | 17 | 33 | 24 | 15 | 52 | 120 | 79 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | NW 5 | — | — | NNW 5 | NNW 4 | WSW 12 | SW 13 | — | SW 11 | WSW 11 | WSW 10 | SW 10 | — | — | — |
| kJ | — | — | — | — | — | — | 7 | — | — | 4 | 2 | 13 | 7 | — | 29 | 11 | 11 | 4 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 13 | — | SW 8 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 4 | — | 3 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 4 | ESE 3 | E 3 | ENE 3 | — | — | N 5 | N 3 | N 5 | — | — | — | SSW 3 | SSW 4 | SSW 5 | SE 3 | ESE 3 | NE 3 | NW 5 | WNW 4 | S 4 |
| kJ | 1 | 3 | 1 | 2 | — | — | 18 | 11 | 8 | — | — | — | 5 | 11 | 24 | 3 | 4 | 4 | 35 | 16 | 12 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 28 | 28 | 14 | 14 | 13 | 13 | 127 | 31 | 14 | 127 | 127 | 120 | 120 | 120 | 120 | 198 | 285 | 298 | 31 | 62 | 13 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 16 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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