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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 12 pm Saturday 16 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
11.2° C
(Which is slightly warmer than usual)How big are the waves at Cable Bay (Porth Trecastell) today?
The current surf forecast for Cable Bay (Porth Trecastell) at 5PM is: 0.6m 4s primary swell from a Southwest direction and 0.1m 13s secondary swell from a Southwest direction (forecast issued at 12:00pm May 16). An open ocean swell of 0.2m 4s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 May) | 0.5ft (0.1m) | 13s |
| Afternoon (16 May) | 2ft (0.6m) | 3s |
| Evening (16 May) | 2.5ft (0.7m) | 4s |
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 14mm), heaviest on Mon night. Very mild (max 12°C on Mon night, min 8°C on Sat night). Winds increasing (calm on Sun night, fresh winds from the SSW by Mon night). | ||||||||||||||||||||||||
Sat 16 | Sunday 17 | Monday 18 | Tue 19 | |||||||||||||||||||||
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 | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 13 | S 13 | SW 4 | SW 4 | WSW 4 | W 4 | W 5 | W 5 | W 5 | SW 5 | SW 5 | SW 5 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SSW 6 | SSW 6 | SW 6 | SSW 4 | S 4 | SSW 5 | S 6 | |
7 | 3 | 9 | 12 | 14 | 28 | 42 | 41 | 43 | 35 | 49 | 90 | 119 | 96 | 56 | 40 | 29 | 24 | 22 | 5 | 5 | 9 | 24 | 94 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | on | glassy | on | on | on | cross-on | cross-off | cross | cross | cross-on | |
High Tide | 9:16AM4.22m | 9:42PM4.19m | 10:02AM4.30m | 10:24PM4.29m | 10:49AM4.27m | 11:09PM4.30m | ||||||||||||||||||
Low Tide | 4:14PM-0.01m | 4:37AM0.01m | 5:00PM-0.03m | 5:24AM-0.11m | 5:47PM0.04m | 6:14AM-0.11m | ||||||||||||||||||
 | | | |  |  |  |  | | |  | |  | | | |  | | | | | | | | |
 | 5:18 | — | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 | — |
 | — | — | — | 9:10 | — | — | — | — | — | — | — | 9:13 | — | — | — | — | — | — | — | 9:14 | — | — | — | 9:15 |
1 | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | 4 | 3 | |
Temp °C | 9 | 10 | 10 | 10 | 10 | 9 | 8 | 9 | 9 | 10 | 9 | 9 | 9 | 9 | 8 | 9 | 9 | 10 | 11 | 11 | 11 | 10 | 10 | 12 |
6 | 6 | 5 | 7 | 5 | 3 | 3 | 4 | 3 | 4 | 2 | 4 | 4 | 5 | 6 | 8 | 6 | 5 | 7 | 7 | 8 | 6 | 6 | 6 | |
Swell 1 Height (m) Direction Period (s) | NNW 5 | N 4 | N 4 | — | S 13 | S 13 | S 13 | — | — | NW 4 | — | S 12 | — | — | SW 6 | SW 6 | SW 6 | WNW 3 | — | SW 6 | SW 5 | SW 6 | SSW 5 | — |
 kJ | 4 | 1 | 1 | — | 3 | 3 | 3 | — | — | 7 | — | 3 | — | — | 56 | 40 | 29 | 1 | — | 5 | 5 | 1 | 24 | — |
Swell 2 Height (m) Direction Period (s) | SW 13 | S 13 | SW 13 | SW 13 | — | — | — | — | — | — | SW 12 | — | — | — | — | WNW 4 | WNW 4 | WNW 3 | — | — | — | — | — | — |
| kJ | 7 | 3 | 7 | 7 | — | — | — | — | — | — | 6 | — | — | — | — | 3 | 2 | 1 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SW 3 | SW 4 | SW 4 | WSW 4 | W 4 | W 5 | W 5 | W 5 | SW 5 | SW 5 | SW 5 | SW 6 | SW 6 | WNW 4 | — | — | SSW 6 | SSW 6 | SSW 3 | SSW 4 | S 4 | SE 4 | S 6 |
| kJ | — | 3 | 9 | 12 | 14 | 28 | 42 | 41 | 43 | 35 | 49 | 90 | 119 | 96 | 3 | — | — | 24 | 22 | 4 | 4 | 9 | 8 | 94 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 272 | 256 | 261 | 277 | 261 | 261 | 261 | 185 | 261 | 261 | 256 | 244 | 244 | 44 | 44 | 44 | 44 | 248 | 248 | 198 | 259 | 259 | 285 | 285 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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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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