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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 Friday 29 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
12.8° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Cable Bay (Porth Trecastell) today (29 May):
- Morning surf: Morning surf (29 May, local time) - 3.5ft (1.0m), 5s period with SW swell.
- Afternoon surf: Afternoon surf (29 May, local time) - 3ft (0.9m), 5s period with SW swell.
- Evening surf: Evening surf (29 May, local time) - 3ft (0.9m), 5s period with SW swell.
The current surf forecast for Cable Bay (Porth Trecastell) at 4PM is: 0.9m 5s primary swell from a Southwest direction and 0.1m 15s secondary swell from a Southwest direction (forecast issued at 12:00pm May 29). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 May) | 3.5ft (1.0m) | 5s |
| Afternoon (29 May) | 3ft (0.9m) | 5s |
| Evening (29 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 ForecastSome drizzle, heaviest during Sun night. Very mild (max 15°C on Fri morning, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Fri 29 | Saturday 30 | Sunday 31 | Mon 1 | |||||||||||||||||||||
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 5 | SW 5 | SW 5 | SSW 5 | SW 5 | SSW 5 | SSW 5 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 5 | SW 5 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 5 | SSW 5 | SSW 5 | |
47 | 40 | 33 | 29 | 36 | 47 | 32 | 20 | 15 | 16 | 17 | 24 | 34 | 43 | 32 | 24 | 23 | 23 | 23 | 23 | 23 | 35 | 33 | 40 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | cross-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 | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 8:47AM3.60m | 9:08PM3.66m | 9:25AM3.63m | 9:43PM3.74m | 10:03AM3.65m | 10:18PM3.78m | ||||||||||||||||||
Low Tide | 3:37PM0.59m | 3:58AM0.59m | 4:14PM0.59m | 4:35AM0.52m | 4:50PM0.60m | 5:12AM0.49m | ||||||||||||||||||
 |  | | |  |  | |  | | | | |  | | | | | | | | | | |  | |
 | 5:00 | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:56 | — |
 | — | — | — | 9:30 | — | — | — | — | — | — | — | 9:31 | — | — | — | — | — | — | — | 9:32 | — | — | — | 9:34 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | |
Temp °C | 13 | 15 | 15 | 14 | 13 | 13 | 12 | 12 | 13 | 14 | 15 | 14 | 13 | 13 | 13 | 12 | 13 | 13 | 14 | 14 | 13 | 12 | 12 | 12 |
9 | 11 | 11 | 10 | 9 | 9 | 8 | 9 | 9 | 10 | 10 | 10 | 9 | 9 | 10 | 9 | 11 | 10 | 11 | 10 | 10 | 8 | 8 | 8 | |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | WSW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 5 | SW 12 | SW 11 |
 kJ | 9 | 8 | 8 | 9 | 9 | 9 | 9 | 10 | 10 | 8 | 8 | 7 | 7 | 32 | 15 | 24 | 23 | 23 | 23 | 23 | 23 | 25 | 23 | 5 |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 9 | SW 9 | W 9 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 8 | SW 8 | SW 12 | — | SW 14 |
| kJ | — | — | — | 6 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 3 | 3 | 1 | 9 | 9 | 9 | 9 | 9 | 3 | 3 | 23 | — | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 9 | W 9 | W 9 | S 11 | SW 8 | — | W 9 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 3 | 2 | 2 | 2 | 3 | — | 2 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 5 | SW 5 | SW 5 | SSW 5 | SW 5 | SSW 5 | SSW 5 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 5 | SW 5 | SW 5 | SW 5 | SW 5 | SW 4 | SW 4 | SW 5 | SW 5 | SSW 5 | SSW 5 |
| kJ | 47 | 40 | 33 | 29 | 36 | 47 | 32 | 20 | 15 | 16 | 17 | 24 | 34 | 43 | 32 | 22 | 17 | 18 | 14 | 19 | 23 | 35 | 33 | 40 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 342 | 261 | 299 | 185 | 185 | 172 | 150 | 150 | 179 | 285 | 285 | 248 | 118 | 105 | 105 | 167 | 44 | 44 | 319 | 294 | 105 | 89 | 105 | 198 |
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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