
Surf Forecasts:
Prainha surf forecast from 7 Sep 2026:
- Best quality surf: Monday 7 Sep, 9PM (local time) - 2ft (0.6m), 10s period, SE swell with glassy winds.
- Most powerful swell: Sunday 13 Sep, 6AM (local time) - 7.5ft (2.3m), 13s period, SSE swell with 1,872 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 9PM (local time) - 2ft (0.6m), 10s period with SE 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 Monday (Sep 07) at 9PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.3m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 2.3m 13s and forecast to arrive on Sunday (Sep 13) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 8s period and expected on Friday (Sep 11) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 7th Sep) | 2ft (0.6m) 10s |
| Best Surf | 9PM (Mon 7th Sep) | 2ft (0.6m) 10s |
| Most Powerful | 6AM (Sun 13th Sep) | 7.5ft (2.3m) 13s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Hey, Rusty here. Let's have a look at what Prainha has in store for us over the next couple of weeks.
Alright, the pattern is pretty clear – we've got some small, ordinary surf hanging around for the first week, but the real action is a late-developing swell that’ll make things interesting in the second week. The water’s sitting at 69°F which is a touch warmer than usual for this time of year, so that’s a little bonus.
Monday the 7th kicks off with a 6ft SSE swell, period 9 seconds, offering a solid 506 (moderate wave energy) for the morning. The wind is cross-off from the SSW, around 9 mph, so it’s decent, but the report flags it as marginal due to tide. It’s an advanced break, Prainha, and it's very consistent when conditions line up, so there’s potential, but Monday morning is only just okay.
From there, things flatten out. Tuesday the 8th is tiny with a weak 2ft swell, and the rest of that week stays small – 1ft to 3ft through to Saturday the 13th. A lot of those afternoons get messy with onshore breezes. Wednesday morning the 9th is glassy with 3ft at 8 seconds (145 energy), but it’s ordinary. There’s a real gap of several days here where the surf is just not worth paddling out for.
Now, the standout. It comes on Monday the 14th afternoon. This is the one you’re waiting for. The combined energy jumps right up to 866 (strong wave energy), with a 7ft E swell. The period is a short 7 seconds, but the real story is the wind – it’s offshore from the WSW at 9 mph, and the report is calling for “very good surf conditions.” That 7ft is decent size for an advanced break, and with clean offshore wind, Prainha will be offering the best waves we’ll see in this whole forecast window. Because it’s a whole week out, it’s a promising call, but I’d be locking in my plans now.
The following week sees a return to smaller surf. Tuesday the 15th has a 3ft SE groundswell with a period of 11 seconds (388 energy) and cross-off wind in the morning, but it’s a marginal tide situation. Wednesday the 16th morning has a bigger 6ft SSE swell at 9 seconds (764 energy), but it’s cross-on shore, so messy. The final few days from the 18th on are mostly small and onshore, nothing to get excited about.
So, the clear best bet is Monday afternoon the 14th at Prainha. The rest of the period is small or a write-off. Keep an eye on that day.
Stay stoked.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Wed night. Very mild (max 19°C on Wed afternoon, min 13°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 72mm), heaviest during Thu afternoon. Warm (max 21°C on Fri afternoon, min 16°C on Sat night). Winds increasing (calm on Thu afternoon, fresh winds from the SSE by Sat afternoon). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
AM | PM | 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) | SSE 9 | SE 11 | SE 10 | SE 10 | SE 10 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 12 | E 8 | E 8 | SE 9 | SE 13 | SE 13 | SE 12 |
Wave Graph | |||||||||||||||||||||
436 | 29 | 80 | 60 | 24 | 55 | 117 | 132 | 104 | 74 | 72 | 41 | 61 | 65 | 5 | 84 | 63 | 515 | 290 | 537 | 607 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | glassy | off | cross-on | cross-off | glassy | cross-on | cross-off | cross | glassy | off | glassy | cross-on | cross-on | cross-off | cross | cross | cross | cross-on | cross-on |
High Tide | 12:52PM1.24m | 00:36AM1.07m | 1:31PM1.32m | 1:16AM1.21m | 2:05PM1.35m | 1:52AM1.32m | 2:37PM1.35m | 2:28AM1.38m | 3:06PM1.32m | 3:02AM1.40m | 3:34PM1.27m | 3:36AM1.37m | 4:00PM1.20m | ||||||||
Low Tide | 8:04PM0.43m | 7:41AM0.09m | 8:23PM0.43m | 8:02AM0.03m | 8:27PM0.42m | 8:16AM0.00m | 8:16PM0.38m | 8:27AM0.01m | 8:19PM0.30m | 8:43AM0.05m | 8:38PM0.22m | 9:03AM0.11m | 9:02PM0.16m | ||||||||
6:20 | — | — | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | |
— | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:06 | — | |
mm | — | — | — | — | — | — | — | — | 8 | 15 | 19 | 25 | 4 | 1 | 8 | — | — | — | 4 | 10 | 26 |
Temp °C | 13 | 15 | 15 | 16 | 17 | 17 | 18 | 19 | 19 | 19 | 19 | 18 | 19 | 21 | 21 | 20 | 18 | 17 | 17 | 16 | 17 |
Feels °C | 9 | 13 | 14 | 16 | 18 | 18 | 17 | 18 | 20 | 19 | 21 | 19 | 20 | 21 | 20 | 16 | 12 | 11 | 13 | 12 | 14 |
Swell 1 Height (m) Direction Period (s) | SE 6 | SE 5 | SE 10 | SE 10 | SE 6 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | E 8 | SE 13 | SE 13 | SE 12 |
42 | 18 | 80 | 60 | 18 | 55 | 117 | 132 | 104 | 74 | 72 | 41 | 61 | 65 | 112 | 84 | 63 | 11 | 290 | 537 | 607 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 11 | SE 12 | SE 12 | ENE 6 | SE 10 | SE 10 | SE 11 | SE 12 | SE 13 | SE 16 | E 9 | SSE 13 | SE 12 | E 12 | E 12 | ESE 12 | E 11 | E 9 | E 8 | — |
23 | 29 | 24 | 24 | 8 | 35 | 28 | 33 | 23 | 25 | 39 | 16 | 16 | 6 | 3 | 3 | 13 | 3 | 24 | 22 | — | |
Swell 3 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | SE 10 | ESE 12 | — | SSE 13 | SSE 12 | SE 17 | SE 16 | SE 14 | E 13 | E 13 | SE 11 | S 11 | — | — | — | — | — |
5 | 5 | 5 | 5 | 24 | 15 | — | 34 | 54 | 11 | 64 | 33 | 3 | 3 | 5 | 2 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSE 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 3 | SE 9 | SE 6 | — | E 8 |
436 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 515 | 62 | — | 12 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 128 | 0 | 0 | 73 | 0 | 0 | 73 | 0 | 4 | 0 | 0 | 0 | 54 | 40 | 58 | 133 | 133 | 129 | 128 | 224 |
Best forecast wave conditions in Santa Catarina - Norte | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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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.










