Cupecoy
Pull to refresh
Swl 3
0.3ft 9s.
1kJ
Swl 2
0.5ft 11s.
2kJ
Swl 1
0.9ft 8s.
4kJ
Wnd
13mph
17mph
Hourly Forecast
Timezone: America/Lower_Princes
⏱️s.
⚡️kJ
🔮
🌒
Join Surfnerd+ to check
weekend forecasts
Tuesday 2
Wednesday 3
Thursday 4
Friday 5
Saturday 6
Sunday 7
to unlock wave energy
Tap any forecast cell to see the forecast arrows update on the map.
Surfnerd Logo
Join Surfnerd for free to check this forecast
Join Surfnerd to check forecasts, set your homespot, save and create spots and log your surf sessions.
Sign up with Google

Cupecoy surf guide

Cupecoy is a surf spot located on the southern coast of St. Martin. This place is known for its righthand reef break, which is a bit inconsistent but can deliver decent waves under the right conditions. It’s not always packed with surfers, so if you’re looking for some space, Cupecoy might be worth checking out. Do keep in mind that this spot is primarily suited for experienced surfers.

The best setup for Cupecoy happens when there’s a solid swell coming from the NorthWest, ideally in the range of 3ft (about 0.9 meters). The waves can pitch with a couple of barrelling sections, making it fun for those who can handle it. A NorthEast wind will give you the best conditions, and you can surf at any tide: low, mid, or high. However, it's more suitable for intermediate surfers due to the uneven reef break.

While Cupecoy can provide some fun days on the water, it’s not always the most reliable spot. Since it's a reef break, be cautious with the changing conditions and always keep an eye on the swell size. If you hit it at the right time, you might just enjoy a good session.

Surf reports and surf forecasts nearby Cupecoy

Friar's Bay
Collectivite De Saint Martin, Saint Martin
Beach break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Wilderness
Collectivite De Saint Martin, Saint Martin
Point break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Cupecoy
Sint Maarten, Sint Maarten
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Mullet Bay
Sint Maarten, Sint Maarten
Beach break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Le Galion
Collectivity Of Saint Martin, Saint Martin
Beach break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
The Bowl
Collectivity Of Saint Martin, Saint Martin
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Guana Bay
Sint Maarten, Sint Maarten
Beach break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Anse des Lézards
Unknown Region, Unknown Country
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Anse des Cayes
Unknown Region, Unknown Country
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
St Jean
Unknown Region, Unknown Country
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9

Readme

Welcome! If you’re new to surf forecasting, check out this quick guide.

Forecast Cheat Sheet

Short on time? Focus on wave energy. It’s the best single metric to gauge how big and powerful the waves will be.

Click any table cell to jump to that forecast hour. The map will update with forecast arrows, so you can see if wind and swell direction are lining up.

Use the table sidebar to switch units for height and speed.

Log your surf sessions to compare forecasts with real sessions and sharpen future predictions.

On the map, click a metric label to bring that arrow to the front — handy when arrows overlap.

Models and Updates

Surfnerd blends multiple global and local wind and swell models using advanced interpolation and spatial techniques to create an "ensemble" forecast. Forecasts are refreshed hourly.

Surf Predictions

Our AI-driven algorithm scores surf quality, shown by green, orange, and gray dots. Each forecast hour is rated for wind, swell, and tide quality, then combined into an overall score. Here’s the scale:

Perfect
Good
Average
Bad or No Data

Session logs also feed the algorithm — the more you log, the smarter your forecasts get.

With Surfnerd, no more "you should have been here yesterday"

Wind certainty

Wind certainty tells you how much the weather models agree on the forecast.

  • High certainty: Models agree closely; forecast is reliable.
  • Medium certainty: Some disagreement; conditions may shift slightly.
  • Low certainty: Models diverge; treat forecast with caution.

We calculate this by comparing wind speed, gust and direction from multiple models (like GFS, ECMWF, Arome, and Harmonie) and seeing how closely they match. They are weighted, meaning that some models count more than others, depending on how good they are for a certain spot.

Surfnerd Logo
Join Surfnerd+ and get:
  • Weekend
    + weekday forecasts
    (vs weekdays only)
  • 12-day
    forecast range
    (vs 5-day)
  • 1-hour
    forecast steps
    (vs 3-hour)
  • Wave energy
    metric
    (power rating)
  • Secondary & tertiary
    swells
    (complete picture)
"Great Forecasts. Nothing more, nothing less."
Login to do spot actions