Mawi Surf Forecast and Surf Report

Alright, let’s break it down. We’ve got a long, solid run of south-west groundswell hitting Mawi, a reef break that loves that direction. This one’s for advanced surfers only—once the swell pushes past 8 ft, it’s expert territory, and even the smaller days pack a punch. Water temp is about average for this time of year, nothing unusual.

The action starts Sunday, 13 September, with clean cross-off winds out of the SE and a solid 6 ft SW groundswell with an 18-second period—that’s proper long-period energy. The combined swell energy is strong (2786), and that same mix holds through Monday and Tuesday, though the period drops to 15-16 seconds. Winds stay clean, but the wave quality is held back a bit by tricky tide conditions.

Wednesday and Thursday, 16-17 September, keep the same vibe: 6 ft to 7 ft SW/SSW swell, moderate SE breeze, still cross-off. Energy stays moderate to strong (1287-1754). Not firing on all cylinders yet, but far from flat.

Friday, 18 September, things turn. The swell drops to 6 ft in the morning and 4 ft in the afternoon, but the wind goes lighter—almost glassy by afternoon with a light SE breeze. The period holds at 14-16 seconds, energy is decent (1020-1064), and the conditions are marked as "excellent for experienced surfers." Saturday 19 September is similar: 5 ft SW, clean, light winds, excellent.

Now here’s the first standout. Sunday, 20 September, sees the swell kick back up to 7 ft to 7 ft from the SW, period at 16 seconds, with a gentle SE breeze. Combined energy jumps to nearly 2000-2110, and conditions are excellent. That’s your best bet in the first week—solid, clean, powerful lines at Mawi with that long-period SW groundswell and favorable cross-off wind. Crowds can show up sometimes, but with the size and the advanced-only nature, it won’t be a zoo.

Monday 21 September keeps the quality with 6 ft to 7 ft SW, light SE wind, excellent conditions. Tuesday 22 September starts clean but the afternoon gets more marginal as the wind picks up.

Then we hit a bigger pulse around Wednesday 23 September and Thursday 24 September: 8 ft to 8 ft SSW swell, 16 seconds, but wind is up to 12-15 mph from the SE, cross-off but stiff. That’s heavy swell, but quality is just marginal due to wind and tide.

Into the second week, we get a serious standout. Friday, 25 September, brings a big 10 ft SSW groundswell with an 18-second period—very long period, very powerful. Combined energy is massive (5267). That’s a lot of water moving. Wind is still cross-off from the SE at 12 mph. This is only for experts—at 10 ft, it’s a proper session. Conditions are noted as marginal, likely due to size and some wind, but the raw energy is undeniable. Saturday 26 September drops back to 8 ft, still SSW, still punchy.

Then Sunday, 27 September, looks excellent again. Wind goes very light—3 mph from the SSE in the morning, near glassy, and 6 mph from the south in the afternoon. The swell holds at 7 ft to 8 ft from the SSW, period at 14-15 seconds. That’s clean, powerful, and much more manageable than the 10 ft day. For a late-window call, this is the one to circle.

Monday 28 September finishes with 7 ft SSW, light SE wind, and excellent conditions.

Overall, if you’re experienced, the standout days are Sunday 20 September and Sunday 27 September. Both offer clean, powerful SW groundswell with light-to-gentle winds. The 25 September is for the brave—10 ft of long-period SSW is a beast. Everything else is solid but not spectacular. Mawi is consistent, exposed, and ready to go for this whole stretch.

Rusty.

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