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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 Saturday 30 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
12.9° C
(Which is 1.4°C warmer than normal for this time of year)How big are the waves at Cable Bay (Porth Trecastell) today (30 May):
- Afternoon surf: Afternoon surf (30 May, local time) - 2.5ft (0.8m), 4s period with SSW swell.
- Evening surf: Evening surf (30 May, local time) - 3ft (0.9m), 4s period with SSW swell.
The current surf forecast for Cable Bay (Porth Trecastell) at 9PM is: 0.9m 4s primary swell from a South-southwest direction and 0.1m 14s secondary swell from a Southwest direction, 0.1m 9s secondary swell from a Southwest direction (forecast issued at 06:00pm May 30). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 May) | - | - |
| Afternoon (30 May) | 2.5ft (0.8m) | 4s |
| Evening (30 May) | 3ft (0.9m) | 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 ForecastHeavy rain (total 28mm), heaviest during Mon night. Very mild (max 15°C on Sat afternoon, min 12°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||||||
Sat 30 | Sunday 31 | Monday 1 | Tue 2 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
SSW 4 | SSW 4 | SSW 4 | SW 5 | SW 5 | SW 5 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SW 6 | SW 6 | SW 6 | |
17 | 18 | 34 | 45 | 33 | 26 | 23 | 23 | 23 | 23 | 23 | 39 | 69 | 86 | 82 | 86 | 90 | 119 | 97 | 65 | 59 | 37 | 38 | 40 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | |
High Tide | 9:43PM3.74m | 10:03AM3.65m | 10:18PM3.78m | 10:40AM3.62m | 10:54PM3.79m | 11:17AM3.55m | ||||||||||||||||||
Low Tide | 4:14PM0.59m | 4:35AM0.52m | 4:50PM0.60m | 5:12AM0.49m | 5:25PM0.63m | 5:48AM0.50m | ||||||||||||||||||
 | |  |  |  |  |  | | | | | | | |  | |  | |  | | | | | | |
 | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — |
 | — | 9:31 | — | — | — | — | — | — | — | 9:32 | — | — | — | — | — | — | — | 9:34 | — | — | — | — | — | 9:35 |
— | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 11 | 1 | 13 | — | — | — | — | — | |
Temp °C | 15 | 14 | 13 | 12 | 13 | 13 | 13 | 13 | 14 | 14 | 13 | 13 | 12 | 12 | 13 | 13 | 14 | 14 | 13 | 13 | 12 | 13 | 13 | 13 |
10 | 9 | 8 | 8 | 10 | 11 | 10 | 9 | 10 | 10 | 9 | 9 | 7 | 7 | 8 | 9 | 10 | 11 | 9 | 10 | 9 | 12 | 11 | 10 | |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 14 | SW 5 | SW 5 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 6 | SW 6 | SW 6 |
 kJ | 8 | 7 | 7 | 32 | 33 | 26 | 23 | 23 | 23 | 23 | 23 | 23 | 5 | 5 | 5 | 5 | 8 | 8 | 8 | 8 | 7 | 37 | 38 | 40 |
Swell 2 Height (m) Direction Period (s) | SW 11 | SW 9 | W 9 | W 9 | WSW 12 | SW 12 | SW 15 | WNW 3 | — | SW 8 | SW 8 | — | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 10 | W 10 | — | SW 13 | SW 13 | SW 13 |
| kJ | 4 | 3 | 2 | 1 | 15 | 24 | 9 | 1 | — | 3 | 2 | — | 8 | 8 | 8 | 8 | 8 | 8 | 4 | 2 | — | 7 | 7 | 7 |
Swell 3 Height (m) Direction Period (s) | SW 8 | — | W 9 | — | SW 15 | SW 15 | — | SW 15 | SW 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 3 | — | 2 | — | 9 | 9 | — | 9 | 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 4 | SSW 4 | SSW 4 | SW 5 | — | — | SW 5 | SW 5 | SW 4 | SSW 4 | SSW 4 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | — | — | WNW 3 |
| kJ | 17 | 18 | 34 | 45 | — | — | 23 | 23 | 12 | 9 | 9 | 39 | 69 | 86 | 82 | 86 | 90 | 119 | 97 | 65 | 59 | — | — | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 150 | 299 | 44 | 248 | 167 | 105 | 167 | 167 | 44 | 44 | 302 | 258 | 105 | 105 | 73 | 226 | 226 | 226 | 226 | 248 | 248 | 167 | 44 | 44 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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