Porth Trwyn
Anglesey · United Kingdom
Rating right now
An open W-facing sand beach on the Irish Sea near Anglesey, Porth Trwyn works on SW–N groundswell; E–SE winds offshore, with conditions most reliable april–october.
10-day forecast
Local time · updates hourly
Wave height & period
Wind
| Time | Rating | Waves | Swell | Wind | Air |
|---|---|---|---|---|---|
Water temperature by month
This month: ~15.2°C (59.4°F) on average
Jan
9.6°C
49.3°F · 8.2–11°C
Feb
8.6°C
47.5°F · 7.5–9.6°C
Mar
8.2°C
46.8°F · 7.3–9.3°C
Apr
9°C
48.2°F · 8–10°C
May
10.2°C
50.4°F · 8.5–11.5°C
Jun
12.1°C
53.8°F · 11.2–13.2°C
Jul
13.7°C
56.7°F · 12.1–14.9°C
Aug
15°C
59°F · 14.3–15.8°C
Sep
15.2°C
59.4°F · 14–16.3°C
Oct
14.5°C
58.1°F · 13.2–16.1°C
Nov
12.7°C
54.9°F · 10.9–14.3°C
Dec
11°C
51.8°F · 9.9–12.6°C
25-year monthly averages from the NOAA OISST satellite record — typical range min–max, not a live reading.
Know before you go
Best swell
SW–N
Best wind
E–SE
Break type
Beach break
Best season
April–October
Safety: Friendly by surf standards, but rip currents and drop-in etiquette still apply. Shifting sandbars create moving rip currents — learn to spot them and use them to get out back.
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