Not enough data yet. Log a session to help build the accuracy score.
This guide was generated from conditions data. Know this spot? Submit your own tips below.
Nihiwatu (now Nihi Sumba) is a legendary left-hand reef break on the remote island of Sumba, Indonesia. The wave breaks over an extremely shallow volcanic coral shelf, producing fast, barreling lefts of extraordinary quality. Access was historically controlled by the adjacent luxury resort, making it one of surfing's most exclusive waves. The surrounding coastline is wild and undeveloped, with traditional Sumbanese villages and dense savannah providing a dramatically different landscape to typical Indonesian surf destinations.
South-westerly Indian Ocean groundswells from May through October deliver the goods. The wave needs 4ft-plus swell and handles up to 10ft. Easterly trade winds blow offshore during the dry season. The wave is tide-sensitive: mid-tide provides the safest barrel with adequate water over the reef. Low tide exposes the coral dangerously.
The take-off zone is concentrated on the outside reef ledge where the swell jacks abruptly from deep to shallow water. The barrel begins immediately from the drop. Position yourself on the boil at the reef edge. The deep-water channel provides entry and exit.
Extremely shallow coral reef with severe laceration risk on any wipeout. The wave is fast, powerful, and breaks very close to the reef surface. Hold-downs drive you across sharp coral. The remote location means limited medical facilities. Infections develop rapidly from untreated cuts.
Access is via the Nihi Sumba resort or by boat from other accommodation on the island. Sumba is reached by flight from Bali to Tambolaka airport. The resort manages numbers in the water. Independent access requires local knowledge and boat hire.
The controlled access keeps numbers very low (typically 5-10 surfers maximum). Guests at the resort have priority. The experience is as close to a private wave as exists in Indonesia.
The wave is faster and shallower than it appears. A step-up board with extra speed handles the pace. Reef boots, helmet, and full first aid kit are non-negotiable. Mid-tide sessions only unless you have extensive shallow reef experience. Respect the Sumbanese culture; the island has deep traditional beliefs that should be honoured.
No recent check-ins. Be the first to report.
Record your session, conditions and gear.
Based on historical weekly averages
Combining historical conditions with school holiday crowd pressure to find the sweet spot.
How busy each week is based on school holiday overlap from feeder markets.
The timing score combines two signals: historical conditions quality (how good the skiing or surfing typically is in a given week, based on 5 years of weather data) and crowd pressure (how many of this destination's feeder markets have school holidays that week).
Crowd pressure is weighted by each feeder country's share of visitors. If 40% of a resort's visitors come from France and France is on holiday, that contributes 0.40 to the crowd pressure score. Crowds can reduce the timing score by up to 35%, ensuring conditions still matter most.
Scores: 5 = great conditions with low crowds (the sweet spot). 4 = great conditions with moderate crowds, or good conditions with low crowds. 3 = average. 2 = below average conditions or very crowded. 1 = poor conditions or peak holiday chaos.
Last 29 days of logged conditions.
Sign up to save favourite spots and get surf alerts
Create free accountCreate a free profile and let employers in Nihiwatu find you.
Create Profile →Current conditions refresh every 3 hours when the cron runs. Hourly data updates every 30 minutes. The 7-day forecast, luck factor, and packing notes are all pre-computed at the same time.
We compare the 7-day forecast to the last 5 years of marine data for the same week at Nihiwatu. The delta tells you whether conditions are shaping up better, worse, or about the same as a typical mid-June.
We score each day of the 7-day forecast using the same algorithm as the leaderboard, and highlight the highest scorer.
Open-Meteo's Marine API (swell height, period, water temperature) and Weather API (wind and conditions).
Honestly, no. Every break has tide windows, swell directions and reef contours that a global model cannot see. Treat the score as a starting point, then check a local cam.
The best week for surf at Nihiwatu is the week of 30 November (score 3/5) with low crowds.
Rideable waves with moderate energy. Reasonable period putting some grunt behind each wave. Strong offshore, clean but tough to paddle into.
Heads up: thunderstorms forecast, and jellyfish: peak season.
Indicators derived from forecast data, not official warnings. Always check local lifeguard or official advice.
Crystal clear water: ~18m visibility
Daily scores over the last 12 months at Nihiwatu