Sumatra on That Margies Swell
No tide data for this spot or date range.
Mawi is a quality, south coast, dry season break that works in all swell sizes, set in a beautiful west-facing bay. Consistent spot that attracts boats and land-based surfers from Kuta and Grupuk losmens when... more
Wave Height Modifier
You can calibrate our breaking wave estimates in two ways: If the forecast is consistently over or under-calling the waves then use the 'wave height modifier' to adjust the scale. If the forecast is getting things wrong for particular swell directions then try adjusting the 'optimum swell direction'. Trial and error coupled with local knowledge will let you fine tune things where there are problems - although be aware some subtle local factors like a blocking headland, a deep water channel and tidal currents etc. will get missed. The breaking wave estimate is only ever a guide to using our detailed swell data to make the final call.
Optimum Swell Direction
A detailed long range Mawi Surf forecast, surf report and (where available) surf webcams. This surf forecast will be useful for both Mawi and nearby surf spots in the Bali + Lombok area. The information here is carefully calibrated and checked, please do read the surf forecasting help information first which will give you a good idea how to start interpreting this information.
15 day surf forecasts and advanced tools.
Enhanced iOS and Android apps.
All this from only US$2.89/month.