- Forecast
- Maps
- Live
- Weather State
- Spot Information
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 Sunday 31 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
13.8° C
(Which is 2.3°C warmer than normal for this time of year)How big are the waves at Cable Bay (Porth Trecastell) today (31 May):
- Afternoon surf: Afternoon surf (31 May, local time) - 1ft (0.3m), 12s period with SW swell.
- Evening surf: Evening surf (31 May, local time) - 3ft (0.9m), 5s period with SSW swell.
The current surf forecast for Cable Bay (Porth Trecastell) at 10PM is: 1.1m 5s primary swell from a Southwest direction and 0.3m 12s secondary swell from a Southwest direction (forecast issued at 06:00pm May 31). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 May) | - | - |
| Afternoon (31 May) | 1ft (0.3m) | 12s |
| Evening (31 May) | 3ft (0.9m) | 5s |
Table - waves today at Cable Bay (Porth Trecastell). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 15mm), heaviest on Mon morning. Very mild (max 15°C on Tue afternoon, min 12°C on Sun night). Winds increasing (light winds from the W on Mon night, strong winds from the S by Wed morning). | ||||||||||||||||||||||||
Sun 31 | Monday 1 | Tuesday 2 | Wed 3 | |||||||||||||||||||||
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 12 | SW 12 | SW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SW 6 | SSW 6 | SSW 6 | SSW 6 | SW 6 | SW 7 | WSW 4 | SW 4 | SSW 5 | SSW 6 | SSW 7 | |
23 | 23 | 53 | 90 | 117 | 129 | 119 | 90 | 151 | 149 | 115 | 87 | 55 | 34 | 24 | 25 | 26 | 39 | 25 | 19 | 25 | 61 | 283 | 332 | |
Wind (km/h) | ||||||||||||||||||||||||
on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | cross-on | cross-on | on | |
High Tide | 10:18PM3.78m | 10:40AM3.62m | 10:54PM3.79m | 11:17AM3.55m | 11:31PM3.75m | 11:54AM3.43m | ||||||||||||||||||
Low Tide | 4:50PM0.60m | 5:12AM0.49m | 5:25PM0.63m | 5:48AM0.50m | 6:00PM0.69m | 6:26AM0.57m | ||||||||||||||||||
 |  |  |  |  |  | | | | | | | | | | |  | |  | | | | | | |
 | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — |
 | — | 9:32 | — | — | — | — | — | — | — | 9:34 | — | — | — | — | — | — | — | 9:35 | — | — | — | — | — | 9:36 |
— | — | — | — | 1 | 2 | 1 | 3 | 2 | 1 | 1 | — | 1 | 1 | — | — | — | — | — | — | — | — | 1 | 1 | |
Temp °C | 14 | 14 | 13 | 12 | 13 | 12 | 13 | 13 | 14 | 13 | 13 | 13 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 13 | 12 | 12 | 12 | 13 |
10 | 10 | 9 | 7 | 8 | 6 | 8 | 9 | 10 | 9 | 9 | 9 | 10 | 12 | 11 | 11 | 11 | 13 | 13 | 10 | 9 | 7 | 5 | 7 | |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 14 | SW 11 | SW 14 | SW 14 | SW 14 | SSW 6 | SW 6 | SSW 6 | SSW 6 | WNW 3 | — | SW 7 | — | — | WNW 4 | — | — |
 kJ | 23 | 23 | 23 | 34 | 23 | 19 | 5 | 8 | 4 | 8 | 8 | 8 | 55 | 34 | 24 | 25 | 1 | — | 25 | — | — | 1 | — | — |
Swell 2 Height (m) Direction Period (s) | SW 15 | — | — | — | — | SW 14 | SW 14 | SW 11 | SW 14 | SW 10 | SW 10 | W 10 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | — | — | — | — | — | — |
| kJ | 9 | — | — | — | — | 8 | 8 | 5 | 8 | 4 | 4 | 2 | 7 | 7 | 7 | 7 | 7 | 7 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 4 | SSW 4 | SW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SW 6 | — | WNW 3 | WNW 3 | SSW 6 | SW 6 | WSW 3 | WSW 4 | SW 4 | SSW 5 | SSW 6 | SSW 7 |
| kJ | 12 | 20 | 53 | 90 | 117 | 129 | 119 | 90 | 151 | 149 | 115 | 87 | 44 | — | 1 | 1 | 26 | 39 | 6 | 19 | 25 | 61 | 283 | 332 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 302 | 258 | 105 | 105 | 226 | 226 | 226 | 226 | 248 | 264 | 226 | 173 | 96 | 44 | 44 | 44 | 283 | 44 | 44 | 44 | 105 | 269 | 285 | 256 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 Cable Bay (Porth Trecastell) 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.
Nearest