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Cable Bay (Porth Trecastell) Surf Forecast
/ Wales – Anglesy (10 surf breaks) /
Surf Forecasts:
Cable Bay (Porth Trecastell) surfForecast / Wales – Anglesy / UK
48hr Weather and Surf, issued 6 pm Wednesday 13 May 2026 BSTForecast update in hr min s Forecast update imminent
Cable Bay (Porth Trecastell) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cable Bay (Porth Trecastell) sea temperature is
11.5° C
(Which is 1.2°C warmer than normal for this time of year)How big are the waves at Cable Bay (Porth Trecastell) today?
The current surf forecast for Cable Bay (Porth Trecastell) at 10PM is: 0.1m 16s primary swell from a Southwest direction and 0.3m 7s secondary swell from a Southwest direction (forecast issued at 06:00pm May 13). An open ocean swell of 1.9m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 May) | - | - |
| Afternoon (13 May) | 1.5ft (0.5m) | 7s |
| Evening (13 May) | 1ft (0.3m) | 7s |
Table - waves today at Cable Bay (Porth Trecastell). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 7mm), mostly falling on Wed night. Very mild (max 11°C on Wed afternoon, min 8°C on Wed night). Winds decreasing (strong winds from the NNW on Wed night, calm by Fri night). | ||||||||||||||||||||||||
Wed 13 | Thursday 14 | Friday 15 | Sat 16 | |||||||||||||||||||||
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 7 | SW 7 | SW 7 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | |
19 | 19 | 10 | 10 | 10 | 10 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | |
Wind (km/h) | ||||||||||||||||||||||||
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 | cross-off | cross-off | cross-off | cross-off | cross | cross-on | glassy | on | cross-on | cross-on | on | |
High Tide | 7:41PM3.46m | 7:48AM3.79m | 8:21PM3.75m | 8:32AM4.03m | 9:00PM4.00m | 9:16AM4.22m | ||||||||||||||||||
Low Tide | 1:55PM0.61m | 2:15AM0.82m | 2:43PM0.34m | 3:03AM0.52m | 3:29PM0.12m | 3:50AM0.23m | ||||||||||||||||||
 | |  | |  |  |  | | | |  |  | | | | |  | | | |  |  | | | |
 | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — |
 | — | 9:06 | — | — | — | — | — | — | — | 9:07 | — | — | — | — | — | — | — | 9:09 | — | — | — | — | — | 9:10 |
— | — | — | — | — | 1 | 1 | 1 | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 11 | 10 | 9 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 9 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 |
5 | 3 | 1 | -1 | 0 | -1 | 1 | 1 | 3 | 4 | 5 | 0 | 2 | 1 | 1 | 2 | 2 | 5 | 6 | 7 | 6 | 6 | 5 | 6 | |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | N 5 | N 5 | N 5 | NNW 5 | NNW 4 | N 4 |
 kJ | 19 | 19 | 8 | 2 | 2 | 2 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 17 | 18 | 13 | 8 | 4 | 1 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 7 | — | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 13 | SW 13 | — | — | SW 13 |
| kJ | 10 | 10 | 10 | 10 | 10 | 10 | 2 | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | 7 | — | — | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | S 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 13 | — |
| kJ | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | — |
Wind waves Height (m) Direction Period (s) | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 5 | NNW 5 | — | — | — | WSW 3 | WSW 3 | WSW 2 |
| kJ | 209 | 183 | 307 | 527 | 473 | 423 | 363 | 383 | 349 | 289 | 384 | 407 | 249 | 161 | 132 | 71 | 48 | 26 | — | — | — | 1 | 1 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1525 | 618 | 604 | 605 | 886 | 320 | 370 | 352 | 1189 | 284 | 53 | 75 | 63 | 244 | 325 | 284 | 284 | 272 | 272 | 272 | 272 | 259 | 272 | 272 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Ocean Swells (m)- Wind Speed (km/h)
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