Surfing Cas en Bas: The Complete Guide

Cas en Bas is a sandy-bottom beach break located in Gros Islet, St Lucia, offering a right-hander along the Caribbean's tropical waters. Cas en Bas is St Lucia's main surf beach—a consistent beach break on the northeast coast that draws the island's small surf community. Rated as intermediate difficulty with lightly crowded conditions, this beach break is a worthy destination for surfers looking beyond the usual suspects.

Best Conditions

Swell Direction: The ideal swell direction is NE (45°), with workable conditions from NNE to E (20°–80°). Swells outside this window will either miss the break or produce disorganized waves.

Swell Size: Cas en Bas needs a minimum of 0.6m / 2ft to start working and handles swells up to 2m / 7ft before conditions deteriorate.

Swell Period: Look for a swell period of at least 8 seconds, with 12 seconds being the sweet spot. Longer periods deliver more organized, powerful waves with better shape.

Wind: True offshore here blows from the W (270°). The full offshore range spans WSW to WNW (240°–300°). Glassy conditions under 4km/h from any direction also produce excellent surf. Plan for early morning dawn patrol sessions.

Tide: This spot works best at all tides. Optimal tide range is 0.2m–2.5m.

When to Go

Primary Season: The prime window at Cas en Bas runs November, December, January, February, March (Nov–Mar). This is when swell consistency and direction align most reliably with the break.

Secondary Season: A secondary window opens September, October (Sep–Oct). While not as consistent, patient surfers can still score quality sessions during this period.

Season Notes: St Lucia's main surf beach.

Water Temperature: Expect water temperatures around 27°C / 81°F. Boardshorts or a thin rashguard are all you need.

Getting There

The nearest airport is UVF, roughly 60 minutes by car.

Access: Northeast St Lucia. Island's surf hub.

Direct flights are available from major hubs including JFK, MIA, ATL, LHR, YYZ. Arrange your pickup in advance as transport options are limited.

Hazards & Tips

Known Hazards:

🌀 Strong rips — Dangerous currents

St Lucia's main surf beach.

Safety Tips:

Study the currents before paddling out. Know your exit strategy

Skill Level: This spot is rated intermediate (4/10). Crowd Level: Typically lightly crowded (3/10).

Check the Live Forecast

Planning a session at Cas en Bas? Check the live forecast on Strike Mission to see today's conditions and the 10-day outlook. Our Strike Score algorithm rates this spot from 0 to 100 every day, factoring in swell direction, size, period, wind, and tide — so you know exactly when to paddle out.

Don't leave your next surf trip to chance. Let the data tell you when Cas en Bas is firing.

*Conditions data sourced from Strike Mission's verified spot database.*