Surf Forecasts:
Prainha surf forecast from 26 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 3AM (local time) - 1.5ft (0.5m), 16s period, SE swell with offshore winds.
- Most powerful swell: Tuesday 1 Sep, 6PM (local time) - 6ft (1.8m), 8s period, SSE swell with 446 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 3AM (local time) - 1.5ft (0.5m), 16s 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 Wednesday (Aug 26) at 3AM. The primary swell is predicted to be 0.5m and 16s period with a secondary swell of 0.5m and 12s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.8m 8s and forecast to arrive on Tuesday (Sep 01) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 8s period and expected on Friday (Aug 28) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 26th Aug) | 1.5ft (0.5m) 16s |
| Best Surf | 3AM (Wed 26th Aug) | 1.5ft (0.5m) 16s |
| Most Powerful | 6PM (Tue 1st Sep) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, grab your board and listen up. It's Rusty here, and I'm looking at the charts for you.
The window ahead is a tough one for Prainha. There's a big gap of nothing to start with. We don't see any proper surf on offer until Wednesday the 26th of August, and that's the only real standout in the whole run. After that first day, it's a long, drawn-out stretch of mostly poor conditions right through until the first week of September. It gets a little more interesting again around the 8th and 9th of September, but those are long-range calls.
Right, let's get into the one morning that actually fires.
Wednesday morning, August 26th – This is it, the pick of the bunch. Prainha will be handling a nice, clean 3 ft groundswell rolling in from the southeast. The period is a very long 16 seconds, so these waves will have real power and shape. The combined swell energy is moderate. What makes this special is the wind: a glassy 3 mph westerly. It’ll be dead calm, making for absolutely perfect, clean conditions. This is for the advanced crew though; that long-period swell on an exposed break will take some reading. Crowds are possible here, so get there early. The water temp for this break is basically what you'd expect for the time of year.
Now, the rest of the run is ordinary. Friday the 28th through to Tuesday the 1st of September, the swell is small and short-period, around 8 to 9 seconds, with messy cross-shore winds. The combined energy is weak to moderate. It's basically unsurfable. Wednesday morning the 9th of September looks promising on the charts, with glassy conditions and a 4 ft swell from the southeast at a 9-second period, giving a moderate to strong kick of energy. But that's a long way out, so the confidence isn't there yet. The 10th of September also has a good-looking long-period swell in the morning but again, it's in the second week.
Like I always say, a blank run like this is just how it goes sometimes. The forecast can change, but for now, don't hold your breath for Prainha.
Rusty, signing out.
Short Range ForecastMostly dry. Warm (max 21°C on Fri afternoon, min 15°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Mon afternoon. Warm (max 24°C on Sat morning, min 19°C on Sat afternoon). Wind will be generally light. | ||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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) | SE 16 | SE 16 | SE 15 | SE 15 | SE 14 | SE 14 | SE 13 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 8 | E 8 | E 9 | E 9 | E 9 | E 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 73 | 348 | 421 | 438 | 293 | 179 | 106 | 142 | 191 | 190 | 153 | 201 | 148 | 91 | 91 | 159 | 126 | 95 | 99 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | on | cross-on | cross | on | cross-on | cross | cross-on | glassy | glassy | cross | cross-off | cross-off | cross | glassy | cross-off | cross-on | cross |
High Tide | 1:33AM1.23m | 2:15PM1.34m | 2:09AM1.33m | 2:48PM1.38m | 2:43AM1.39m | 3:22PM1.39m | 3:19AM1.41m | 3:55PM1.35m | 3:56AM1.39m | 4:30PM1.28m | 4:35AM1.33m | 5:07PM1.17m | |||||||
Low Tide | 8:02AM0.05m | 8:20PM0.34m | 8:21AM0.00m | 8:29PM0.31m | 8:40AM-0.03m | 8:43PM0.27m | 9:01AM-0.02m | 9:03PM0.24m | 9:26AM0.02m | 9:28PM0.22m | 9:54AM0.11m | 9:57PM0.22m | |||||||
 |  | | |  | | | | | | | | | | | |  |  |  | |
 | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:28 | — | — |
 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 16 |
Temp °C | 16 | 18 | 19 | 19 | 19 | 20 | 20 | 20 | 21 | 21 | 24 | 20 | 20 | 19 | 20 | 20 | 20 | 20 | 20 |
Feels °C | 16 | 18 | 19 | 20 | 21 | 21 | 20 | 22 | 21 | 21 | 25 | 19 | 20 | 19 | 20 | 21 | 21 | 22 | 19 |
Swell 1 Height (m) Direction Period (s) | SE 12 | SE 16 | SE 15 | SE 15 | SE 14 | E 6 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 8 | E 8 | E 9 | E 9 | E 9 | E 9 |
| kJ | 73 | 348 | 421 | 438 | 293 | 51 | 94 | 142 | 191 | 190 | 153 | 201 | 148 | 91 | 91 | 159 | 126 | 95 | 99 |
Swell 2 Height (m) Direction Period (s) | SE 16 | ENE 4 | ENE 5 | E 5 | E 6 | SE 14 | SE 13 | SE 12 | SE 12 | SSE 11 | SE 10 | SE 10 | SSE 6 | SSE 5 | SE 10 | SE 10 | SSE 7 | SE 7 | SE 7 |
| kJ | 66 | 4 | 4 | 11 | 33 | 179 | 106 | 51 | 21 | 11 | 4 | 4 | 27 | 9 | 4 | 4 | 4 | 12 | 11 |
Swell 3 Height (m) Direction Period (s) | ENE 3 | — | — | — | — | — | — | — | — | — | — | — | SE 10 | SE 10 | S 7 | SSE 9 | — | — | — |
| kJ | 1 | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | 1 | 8 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | NE 5 | ENE 5 | — | — | — | — | — | ENE 8 | — | SSE 10 | S 6 | S 5 | SSE 4 | — | — | — | — |
| kJ | — | — | 6 | 36 | — | — | — | — | — | 376 | — | 88 | 66 | 17 | 3 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 73 | 4 | 4 | 73 | 4 | 4 | 73 | 0 | 0 | 126 | 11 | 0 | 128 | 0 | 0 | 4 | 4 |
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.
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