Grand Isle 29.3
#5350 of 5756 surf spots in the world · 🇺🇸 United States of America · Louisiana · near Houma
Wind is the enemy here, peaks in August, gentle enough to learn.
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Best time to surf Grand Isle
The best time to surf Grand Isle is August. It rarely works. In August the water sits around 31°C, so pack boardshorts, and the typical wave is 0.5 m. The nearest airport is MSY (89 km) and the nearest town is Houma (82 km).
| Month | Surfable | Clean | Size | Water | Suit |
|---|---|---|---|---|---|
| Jan | 77% | 0% | 0.9 m | 18°C | 3/2 |
| Feb | 82% | 0% | 0.9 m | 17°C | 3/2 |
| Mar | 77% | 0% | 0.9 m | 22°C | 2mm |
| Apr | 82% | 0% | 0.9 m | 24°C | vest |
| May | 71% | 0% | 0.7 m | 27°C | boardies |
| Jun | 47% | 0% | 0.6 m | 30°C | boardies |
| Jul | 25% | 0% | 0.5 m | 31°C | boardies |
| Aug | 26% | 1% | 0.5 m | 31°C | boardies |
| Sep | 46% | 0% | 0.6 m | 29°C | boardies |
| Oct | 64% | 0% | 0.8 m | 26°C | boardies |
| Nov | 75% | 0% | 0.9 m | 22°C | vest |
| Dec | 75% | 0% | 0.8 m | 19°C | 2mm |
What is under Grand Isle
Eight kilometres out along its swell window the sea floor drops to 81 m, shoaling steadily over the last kilometres. Alongside the bank the survey finds a channel, 215 m against 81 m, deep enough to bend swell onto one peak instead of spreading it along the beach.
Measured, not estimated: NOAA ETOPO 2022 global relief at 15 arc-seconds, about 460 m per cell, sampled along this spot’s own swell window. At that scale the survey sees passes and channels; it cannot see a reef ledge, so nothing here is said about how the wave breaks.
Why 29.3
Seven parts, each normalised 0 to 1 and multiplied by its weight; the sum is scaled so the best spot in the world scores 100. Wave quality and what the spot does on its best days carry more than half of it, which is what separates this from a ranking of where the water is warm.
The detail
Faces 144° with 53% open water around it. Friendly morning wind 47% of days. Mean peak period 5.5 s. Days over 3 m: 0%. On its best tenth of days it reaches 1.4 m, with a peak period of 7 s. Mellow days (0.4 to 1.2 m): 70%. Months that work: 8 of 12. Coordinates 29.218, -89.996 (OpenStreetMap).
What it costs to be here
Remote spot, so the local estimate is 15% below the country average. Estimate: World Bank PPP price level for United States of America (2025, United States = 1.00) applied to a fixed surfer basket, then adjusted for how remote the spot is. Your own number moves with the season and how you live.
Sumba has eight spots in this ranking, the best of them inside the world top 50. A cabin is €11,500. The land it sits on is separate, from €6,500 (€9,950 oceanfront), on an 80-year lease that extends at the end. Water, septic and electricity are another €6,500, and furniture is on top, so a finished cabin lands around €28,000 plus the land, payable in instalments.
Eco Beach City is run by the same people as SurfRanking, so treat this as our own advert, not a recommendation. It is an off-plan property in Indonesia: take your own legal and financial advice before paying anything.
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