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Porth Dinllaen Surf Forecast
/ Wales – Lleyn (14 surf breaks) /
Surf Forecasts:
Porth Dinllaen surfForecast / Wales – Lleyn / UK
48hr Weather and Surf, issued 6 pm Wednesday 20 May 2026 BSTForecast 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
12.0° C
(Which is 1.0°C warmer than normal for this time of year)How big are the waves at Porth Dinllaen today?
The current surf forecast for Porth Dinllaen at 3AM is: 0.4m 10s primary swell from a Southwest direction (forecast issued at 06:00pm May 20). An open ocean swell of 1.2m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 0.5ft (0.1m) | 15s |
| Afternoon (21 May) | 3.5ft (1.1m) | 6s |
| Evening (21 May) | 2.5ft (0.8m) | 7s |
Table - waves today at Porth Dinllaen. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 3mm), mostly falling on Wed night. Very mild (max 16°C on Thu afternoon, min 12°C on Wed afternoon). Winds decreasing (fresh winds from the SW on Wed afternoon, light winds from the S by Fri night). | ||||||||||||||||||||||||
Wed 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | |
Swell Height Map |  |    |    |    | ||||||||||||||||||||
SW 6 | SW 6 | SW 6 | SW 10 | SW 8 | SW 6 | SW 6 | W 15 | SW 6 | SW 7 | SW 7 | SW 7 | W 15 | SW 9 | SW 8 | SW 7 | SW 7 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | |
200 | 161 | 146 | 24 | 75 | 0 | 135 | 4 | 85 | 75 | 75 | 64 | 4 | 21 | 21 | 75 | 62 | 157 | 151 | 145 | 96 | 48 | 47 | 46 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 00:07AM3.78m | 12:42PM3.26m | 1:03AM3.55m | 1:44PM2.95m | 2:08AM3.33m | |||||||||||||||||||
Low Tide | 6:59PM0.49m | 7:35AM0.25m | 7:53PM0.69m | 8:35AM0.43m | 8:51PM0.88m | 9:39AM0.58m | ||||||||||||||||||
 |  |  |  |  |  | | |  | | | |  | | | | | | | | | | | | |
 | — | — | — | — | 5:11 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:09 | — | — | — |
 | — | 9:15 | — | — | — | — | — | — | — | 9:17 | — | — | — | — | — | — | — | 9:19 | — | — | — | — | — | 9:21 |
— | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 14 | 15 | 16 | 16 | 16 | 15 | 14 | 14 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 |
5 | 6 | 8 | 8 | 7 | 7 | 9 | 10 | 10 | 14 | 14 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 12 | |
Swell 1 Height (m) Direction Period (s) | — | — | SW 8 | SW 10 | SW 8 | — | W 15 | W 15 | W 15 | SW 7 | SW 7 | W 15 | W 14 | SW 9 | SW 8 | SW 10 | SW 11 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 |
 kJ | — | — | 70 | 24 | 75 | — | 5 | 4 | 4 | 75 | 75 | 4 | 4 | 21 | 16 | 28 | 29 | 157 | 151 | 145 | 96 | 48 | 47 | 46 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 15 | W 15 | W 15 | W 15 | — | WSW 10 | — | — | — | — | SW 4 | SW 4 | WSW 4 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 4 | 4 | 4 | 4 | — | 21 | — | — | — | — | 4 | 4 | 1 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 6 | SW 6 | SW 6 | SW 6 | SSW 5 | SW 6 | SW 6 | SW 6 | SW 6 | — | — | SW 7 | SW 4 | SSW 5 | SSW 6 | SW 7 | SW 7 | — | — | — | — | SW 4 | — | — |
| kJ | 200 | 161 | 146 | 86 | 67 | 122 | 135 | 105 | 85 | — | — | 64 | 29 | 36 | 55 | 75 | 62 | — | — | — | — | 6 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 272 | 268 | 62 | 76 | 217 | 217 | 197 | 149 | 151 | 151 | 14 | 87 | 149 | 31 | 149 | 13 | 154 | 13 | 41 | 13 | 13 | 13 | 87 | 13 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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