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. With the iconic Pitons visible in the distance, the setting is pure Caribbean magic.
Model forecast for swell, wind and tide.
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Water temp
27°C
Wetsuit
Boardshorts / Rashguard
Difficulty
4/10
Crowd level
3/10
Access: Northeast St Lucia. Island's surf hub.
Cas en Bas is a beach break in Gros Islet, St Lucia, that mostly breaks right.
Cas en Bas picks up swell from the NNE round to the E, and it's best when it's coming straight out of the NE. It starts working at around 0.6m and handles up to about 2m, with the sweet spot around 1.2 to 1.7m. Period matters too: aim for 12s or longer, as anything under 8s tends to be weak. These are the numbers our scoring uses, so treat them as a guide rather than a promise.
A W wind is dead offshore at Cas en Bas, and anything from the WSW round to the WNW keeps it clean. The morning is typically the best window, roughly 6am to 10am. Light winds from other directions can still be fine; strong offshores can make it hard to get into waves.
Cas en Bas has a preferred tide range, roughly 0.2m to 2.5m on the local chart.
The most reliable run of swell at Cas en Bas comes Nov to Mar. There's a second window in Sep to Oct too. St Lucia's main surf beach.
The water at Cas en Bas averages around 27°C, so boardshorts or a rashguard will do. It shifts a few degrees through the year, so check the season before you pack.
It's more of an intermediate wave, rated 4/10 for difficulty, so newer surfers are best off sticking to the smaller days. The lineup is usually quiet (crowd 3/10). St Lucia's main surf beach.
The nearest airport on our list is UVF, then it's roughly a one-hour drive. Northeast St Lucia. Island's surf hub.
Peak: Nov, Dec, Jan, Feb, Mar
Secondary: Sep, Oct
St Lucia's main surf beach.
🏄♀️ Martinique's longboard wave • Mellow right • Perfect for progression
🏄 Martinique's surf hub • Multiple peaks • Contest venue
⚠️ Martinique's heaviest • Sharp reef left • Experts only
🇫🇷 Martinique's crown jewel • Heavy hollow reef • Experienced only
🌿 Authentic Martinique • Less crowded • Local vibe
🌴 Remote Martinique right • Rainforest access • Uncrowded power
Compare this break with other destinations in these surf guides.