
Surf Forecasts:
Prainha surf forecast from 11 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 12AM (local time) - 5ft (1.6m), 9s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 14 Sep, 9PM (local time) - 7.5ft (2.3m), 8s period, ESE swell with 686 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 3AM (local time) - 2.5ft (0.7m), 8s period with E swell.
Best Forecast Surf Conditions for Prainha this week:
The surf forecast for Prainha over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 11) at 3AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.3m and 13s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 2.3m 8s and forecast to arrive on Monday (Sep 14) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Friday (Sep 11) at 6PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 11th Sep) | 2.5ft (0.7m) 8s |
| Best Surf | 12AM (Wed 16th Sep) | 5ft (1.6m) 9s |
| Most Powerful | 9PM (Mon 14th Sep) | 7.5ft (2.3m) 8s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’ve been staring at the charts for Prainha and I gotta be straight with you – it’s a tough run ahead. We’re looking at a long, frustrating gap before anything remotely worth paddling out for shows up. For the first four days, from Friday the 11th right through Monday the 14th, it’s just no-go. We’ve got onshore winds, lumpy chop, and poor surf conditions all the way. That’s a solid four-day blank.
Things finally start to look a little more hopeful on Tuesday morning the 15th. That’s the standout of the whole outlook, and it’s not saying much, but it’s the best we’ve got. The morning session sees chest-to-head high sets around 5ft, coming out of the ESE, with a clean, workable surface thanks to a gentle cross-offshore breeze. The combined swell energy is moderate at 332, so there’s some push in the water. The period is short at 8 seconds though, so it’ll be a bit weak and not super lined up – more of a beach-break closeout kind of feel. This spot is exposed and the optimum swell direction is from the south, so this ESE angle is a bit off, but for this region, it’s what we’ve got. The water temp is about average for the time of year. Prainha is an advanced wave and it can get crowded sometimes, so expect company if you head out. Tuesday afternoon the wind swings a bit cross-on and the quality drops off.
After that, we’re back into ordinary conditions through Wednesday and Thursday the 16th and 17th, with messy wind and poor surf. The rest of the second week is a real mixed bag of marginal conditions. We get a couple of brief windows – like Saturday morning the 19th, where we see a glassy 4ft wave from the east with a period of 8 seconds and moderate energy (195), but it’s described as “surfable but very ordinary.” Then Sunday afternoon the 20th looks clean with a cross-offshore breeze, but again, just mediocre chest-high stuff.
The only other flicker of life is way out on Thursday the 24th of September, when we get a clean, gentle offshore wind from the WSW with a 3ft wave from the east. It’s small and the period is short at 7 seconds, but the combined energy is 104, so it’s weak. It’s surfable, but you’ll be fighting for scraps.
Honestly, for this entire 16-day window, there are no true standouts. If you’re desperate, Tuesday morning the 15th is the pick, but keep the expectations low. The area tends to be hit-or-miss, and a blank run like this is part of the deal sometimes. Hang tight.
Rusty
Short Range ForecastHeavy rain (total 82mm), heaviest during Sat night. Warm (max 21°C on Thu night, min 15°C on Sat night). Winds increasing (calm on Thu night, fresh winds from the SSE by Fri night). | Days 5-7 Weather SummaryHeavy rain (total 47mm), heaviest during Sun night. Very mild (max 18°C on Tue morning, min 15°C on Sun night). Winds decreasing (fresh winds from the E on Sun night, light winds from the SSW by Tue morning). | ||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||
Wave Height (m) Direction Period (s) | E 8 | E 8 | E 13 | E 8 | SE 7 | SE 7 | SE 5 | SE 6 | SE 8 | ESE 8 | SSE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | E 9 | SE 7 | SE 8 | SSE 8 |
Wave Graph | |||||||||||||||||||
55 | 40 | 6 | 28 | 163 | 139 | 60 | 61 | 297 | 319 | 213 | 477 | 367 | 300 | 315 | 402 | 136 | 125 | 392 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | cross | cross | cross | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-on | cross-off | cross | cross | cross |
High Tide | 2:28AM1.38m | 3:06PM1.32m | 3:02AM1.40m | 3:34PM1.27m | 3:36AM1.37m | 4:00PM1.20m | 4:11AM1.30m | 4:24PM1.12m | 4:47AM1.20m | 4:46PM1.03m | 5:29AM1.08m | 5:05PM0.94m | |||||||
Low Tide | 8:27AM0.01m | 8:19PM0.30m | 8:43AM0.05m | 8:38PM0.22m | 9:03AM0.11m | 9:02PM0.16m | 9:27AM0.19m | 9:31PM0.14m | 9:52AM0.29m | 10:01PM0.16m | 10:20AM0.40m | 10:35PM0.22m | |||||||
— | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — | |
6:05 | — | 6:05 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | |
mm | 5 | 3 | 3 | 8 | 1 | 6 | 28 | 15 | 13 | 31 | 5 | 4 | 3 | — | — | 3 | 1 | — | 3 |
Temp °C | 21 | 19 | 20 | 20 | 17 | 17 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 17 | 16 | 17 |
Feels °C | 23 | 19 | 20 | 20 | 13 | 13 | 13 | 14 | 15 | 12 | 14 | 14 | 15 | 18 | 18 | 18 | 13 | 12 | 15 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | SE 12 | ENE 5 | E 7 | E 8 | E 8 | SE 6 | ESE 8 | ESE 7 | E 7 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | E 9 | E 8 | E 8 | SE 7 |
55 | 40 | 6 | 21 | 39 | 29 | 31 | 61 | 120 | 99 | 114 | 196 | 367 | 300 | 315 | 402 | 90 | 49 | 102 | |
Swell 2 Height (m) Direction Period (s) | SE 14 | SSE 13 | E 13 | E 8 | E 12 | E 12 | E 11 | E 8 | E 8 | E 8 | SE 8 | SE 12 | SE 11 | SSE 10 | SSE 10 | — | SE 12 | E 14 | E 8 |
30 | 16 | 3 | 28 | 3 | 3 | 3 | 31 | 31 | 11 | 36 | 6 | 5 | 20 | 36 | — | 22 | 4 | 32 | |
Swell 3 Height (m) Direction Period (s) | E 14 | E 13 | — | E 12 | — | — | — | — | — | SE 13 | SE 12 | — | SE 13 | S 8 | — | — | — | — | E 13 |
4 | 3 | — | 3 | — | — | — | — | — | 7 | 6 | — | 7 | 12 | — | — | — | — | 3 | |
Wind waves Height (m) Direction Period (s) | — | — | ENE 8 | — | SE 7 | SE 7 | SE 5 | — | SE 8 | ESE 8 | SSE 8 | ESE 8 | — | — | — | ESE 9 | SE 7 | SE 8 | SSE 8 |
— | — | 60 | — | 163 | 139 | 60 | — | 297 | 319 | 213 | 477 | — | — | — | 301 | 136 | 125 | 392 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 4 | 85 | 4 | 182 | 129 | 129 | 126 | 121 | 128 | 281 | 172 | 128 | 0 | 80 | 0 | 210 | 129 | 61 |
Best forecast wave conditions in Santa Catarina - Norte | |||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Prainha Surf forecast
The above surf forecast table for Prainha provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Prainha can be found by selecting the local surf guide option on the grey menu. Our Prainha surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Prainha) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Prainha may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Prainha is 14 km (9 miles) from Sao Francisco do Sul. If you plan a holiday in Santa Catarina - Norte, look for hotels and other accommodation in Sao Francisco do Sul. Sao Francisco do Sul has rooms for a wide range of budgets as well as car hire and transport links.










