Trearddur Bay (Holy Island)
- Freeride, Shortboard
- Best for
- Beginner
- Skill Level
- Ocean
- Spot Type
- Busy
- Crowd Level
This spot information is AI-assisted and has not been human verified. It may be incomplete, outdated, or incorrect. Verify safety, access, local rules, and current conditions with official or local sources before riding.
About
Trearddur Bay (Holy Island) is a sandy, ocean-facing bay/horse-shoe style beach break on Anglesey. It’s described as exposed with generally small surf, but with the potential to hold and manage larger Atlantic swells during autumn and winter. Providers emphasize that waves can be unreliable, so choosing the right swell/wind combination is important. For surfing, the most consistently recommended setup is northeast offshore wind with a southwest swell, which tends to groom the waves and keep them cleaner. Wave quality varies in reporting (from poor to average), and the ride is typically short—often punchy or mushy depending on swell period. The break is described as exposed overall, but the bay orientation filters out some of the most aggressive energy, and parts of the area can be sheltered by headlands depending on wind direction. Water conditions are cool year-round, and you should plan for wetsuit use in all seasons. Hazards include rocks and rip currents; additionally, submerged rocks are noted near the edges, and boat moorings can be present in summer. Summer months can also be busy with tourists and swimmers, and zoned swimming areas are mentioned. Beyond surfing, the bay is also described as a multi-sport venue for wind sports: kitesurfing freeride and foiling, windsurfing freeride/wave/foil for intermediate riders, and wingfoiling progression for beginners, with a minimum depth stated for foiling. Overall, it’s positioned as a practical, accessible alternative when more exposed west-facing beaches become too intense.
- NE offshore winds can clean up the waves for surfing
- Sandy beach access with easy shore entry
- Bay orientation helps manage bigger Atlantic swell energy
- Multi-sport usability including kite, wind and wingfoil
- Beginner-friendly sandy beach break when conditions are right
- Works with NE offshore winds and SW swells for cleaner waves
- Bay layout can filter more aggressive energy from bigger Atlantic swells
- Parking and basic facilities are available
- Unreliable wave conditions with no strong seasonal pattern reported
- Cool water year-round
- Hazards include rocks and rip currents (and submerged rocks near edges)
- Crowds can build when conditions are good
Wind, water and seasons
Wind
- Direction
- NE
- Offshore directions
- NE
- Wind Range
- 12–25 kts
- Wind Type
- Gradient — Providers describe gradient/prevailing Atlantic-driven wind; NE winds are cited as the best offshore direction for cleaning surf.
- Reliability
- unreliable
- Gust Factor
- Light gusts
- Best Months
- January, February, March
- Shadow Zones
- The northern end of the bay can be sheltered by the headland in certain wind directions.
Water & beach
- Water Type
- Ocean
- Beach
- Sand — Sandy beach.
- Beach Size
- Big
- Waves
- Small
- Launch
- Medium — Beach access with easy shore entry; spacious sandy launch areas at most tide states, though the beach narrows at high tide.
- Launch Difficulty
- Easy
Through the year
Extremely busy with tourists and swimmers in July and August; quieter in winter and dominated by water sports enthusiasts.
October to January sees the most frequent storm activity and rainfall.
By sport
What to expect for each.
Described as a good freeriding/foiling option, particularly when other nearby conditions are too challenging; the bay offers a more protected environment.
- Kite Sizes
- 9–12 m²
Popular for freeriding and beginner wave sailing; described as relatively safe and a good alternative to more exposed nearby spots.
- Sail Sizes
- 5–7.5 m²
Described as deep enough for foiling even at mid-tides, with a relatively sheltered environment for learning and progression.
- Foil Friendly
- Yes
- Min Depth
- 1.5 meters
- Wing Sizes
- 4–6 m²
Exposed sandy beach break in a bay/horseshoe setting that can work for beginners when swell is manageable. Functions best with NE offshore winds and southwest swells; works when larger west-facing beaches are too intense.
- Wave Direction
- Both
- Optimal Swell
- SW
- Swell Height
- 1.5–3 m
- Optimal Tide
- Mid — One provider notes best with mid tide.
- Shelter
- Semi-sheltered — Overall described as exposed, but the bay orientation filters aggressive energy; headlands at both ends shelter parts of the break depending on wind direction.
- Wind Effect
- Northeast winds provide offshore conditions that groom/clean the waves; onshore winds make the surf messy.
- Bigger Swell
- Handles larger Atlantic swells well; also noted that it can hold bigger swells in autumn/winter.
- Wave Quality
- Average — Also described as poor in other reporting; overall quality varies with conditions.
- Wave Power
- Soft — Also described as moderate depending on conditions.
- Wave Shape
- Mixed — Often mushy/mushy-peeling feel described, with mixed shape overall.
- Peel Speed
- Slow — Rides described as slow/punchy depending on swell period.
- Ride Length
- Short — Rides are typically short and punchy or mushy depending on swell period.
- Typical Ride Length
- 40–80 m
- Ride Length Details
- Typical rides are short and punchy or mushy depending on swell period.
Check the forecast before you go
See wind, waves, weather and session windows for Trearddur Bay (Holy Island) in the full forecast view.
Trearddur Bay (Holy Island) wind and wave forecast summary
- Wind
- 9–34 ktsGusts 54 kts
- Direction
- SW222°
- Strongest day
- Sun, Oct 2534 kts
- Windy days
- 7/712 kts or more
- Waves
- 0.6–3.9 m6s period
- Temperature
- 11–15 °C
Over the next 7 days, Trearddur Bay (Holy Island) is forecast for daytime winds of 9–34 kts, peaking around 34 kts on Sunday, October 25 with gusts to 54 kts. The prevailing direction is SW. Waves run 0.6–3.9 m with a period of about 6s. Based on the Wavind model, in the spot’s local time.
Other spots in the area
What to know before you launch
Safety, access, restrictions, rescue, and local rules can change. Treat these details as informational and confirm them locally before launching.
Hazards
- Rips
- Rocks
- Submerged rocks near edges
- Boat moorings
- Heavy crowds in summer
Rescue & support
- Lifeguard
- Seasonal — Lifeguards are seasonal.
- Rescue & Self-Rescue
- Limited — Rescue availability described as limited; RNLI provides rescue services with a lifeboat station at the northern end of the beach.
- Emergency Info
- Holyhead Coastguard: 01407 762051, VHF 14/16. Emergency: 999.
- Localism / Vibe
- None — No localism issues indicated.
Rules of the spot
Warden on site 8:30-5:30pm during season. Respect designated swimming zones during peak summer months; avoid kiting or windsurfing through boat mooring areas.
- Seasonal dog restrictions
- Zoned swimming areas in summer
- Check the tide as the beach can almost disappear at very high spring tides.
- Wear a wetsuit year-round; autumn/winter is colder and often more challenging.
- Park at the main pay-and-display lot for easiest access.
- Respect zoned swimming areas during peak summer months.
Getting there & access
- Nearest City
- Holyhead
- Nearest Town
- Trearddur Bay
- Parking
- Parking available at beach; several pay-and-display car parks adjacent to the beach and along the promenade.
- Access
- From A55: cross Britannia Bridge, continue to Junction 3 (Valley/Y Fali), take left at crossroads, pass Four Mile Bridge to Trearddur Bay. Continue to shops, turn left at petrol station for beach. Follow signs for Trearddur Bay via the A55 Expressway.
- Cost Level
- Moderate
- Local Language
- English, Welsh
What's on the beach
- Accommodation
- Nearby town — Holiday homes/cottages and other accommodation options are available in Trearddur Bay and surrounding areas.
- Food & Drink
- Food and drink nearby; one provider mentions pubs, cafes and restaurants overlooking the beach.
- Equipment Rental:
- No dedicated rental shops on the beach; many riders bring their own gear or rent from shops in the nearby area.
- Gear Storage
- Specific gear storage facilities are limited.
- Gear Repair
- Basic sail/board repair services available via specialist shops in the nearby Rhosneigr area (short drive).
No schools or services are listed for this spot yet.
From riders who've been here
Latest reported conditions
Spot questions
Frequently asked questions
When is the best season at Trearddur Bay (Holy Island)?
The best overall months at Trearddur Bay (Holy Island) are September, October, November. The best wind months are January, February, March.
Which wind directions work at Trearddur Bay (Holy Island)?
Trearddur Bay (Holy Island) works with NE winds. Offshore directions are NE.
What equipment sizes are recommended at Trearddur Bay (Holy Island)?
Recommended equipment sizes at Trearddur Bay (Holy Island): Kitesurfing: 9–12 m² · Windsurfing: 5–7.5 m² · Wingfoiling: 4–6 m². The typical wind range is 12–25 kts.
What skill level is Trearddur Bay (Holy Island) suitable for?
Trearddur Bay (Holy Island) suits these riding levels: Kitesurfing: Beginner · Windsurfing: Intermediate · Wingfoiling: Beginner · Surfing: Beginner.