
Surf Forecasts:
Prainha surf forecast from 5 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 3AM (local time) - 1.5ft (0.4m), 11s period, SE swell with glassy winds.
- Most powerful swell: Saturday 8 Aug, 3AM (local time) - 3ft (0.9m), 12s period, SE swell with 209 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 3AM (local time) - 1.5ft (0.4m), 11s 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 05) at 3AM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.6m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 0.9m 12s and forecast to arrive on Saturday (Aug 08) at 3AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 8s period and expected on Saturday (Aug 08) at 9AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 5th Aug) | 1.5ft (0.4m) 11s |
| Best Surf | 3AM (Wed 5th Aug) | 1.5ft (0.4m) 11s |
| Most Powerful | 3AM (Sat 8th Aug) | 3ft (0.9m) 12s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, let’s get into it. It’s Rusty here, and I’ve been staring at the charts for Prainha, and honestly, it’s a bit of a mixed bag. We’ve got a long 16-day window ahead, but the first week or so is pretty quiet. Don’t get your hopes up too early. The good stuff is hiding out in the second week, and when it shows, it’ll be worth the wait.
Let’s start with the immediate outlook. Right now, we’re looking at very small, weak swell. Wednesday morning the 5th has some glassy conditions with a tiny 2 ft easterly swell, but the energy is weak (54). It’s surfable, but barely. The next few days are more of the same — small, weak, and often blown out by onshore or cross-shore winds. Winds are light early, but they pick up, especially Friday afternoon when a moderate breeze from the SE messes things up. The swell just doesn’t have any punch.
There’s a bit of a lull, with waves staying under 3 ft and periods short, mostly around 6 to 8 seconds. The energy is low, and the consistency is poor. Saturday the 8th and Sunday the 9th are write-offs — small, choppy, and just not worth paddling out for. The water temperature is about average for this time of year, nothing unusual.
Now, the real standout comes on Friday morning, the 14th of August. We’ve got a glassy, offshore breeze from the SW, and swell coming from the SE at 2 ft with a period of 14 seconds. That’s a proper groundswell, and the energy jumps to 280 (moderate). The wind is glassy, so the waves will be clean. This is a morning session you don’t want to miss. The break is Prainha, and it’s an advanced spot, so this is for the experienced crew.
Saturday the 15th keeps it going. Morning has light offshore wind from the west and a 2 ft SE swell at 16 seconds — very long period. The energy is strong (353). The conditions are clean, and the afternoon stays glassy with a light southeast wind. This is shaping up as the best two-day window of the whole forecast. The swell direction is a touch off the optimum south, but the quality and wind make it a winner.
After that, it fades. Sunday the 16th and Monday the 17th see onshore winds and lumpy conditions. The swell picks up a bit but with poor wind. Then Tuesday the 18th afternoon has a spike in energy (545) with a 5 ft SSE swell, but it’s onshore and messy. Wednesday the 19th morning has another glassy moment with a 3 ft SE swell at 11 seconds, clean and worth a look if you’re keen.
Overall, the first week is a bust. The second week, especially the 14th and 15th, is where it’s at. If you’ve got a window, point the car at Prainha and don’t think twice.
Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Warm (max 24°C on Thu night, min 17°C on Fri afternoon). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Sat night. Very mild (max 18°C on Sat afternoon, min 14°C on Sun night). Mainly fresh winds. | ||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
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 7 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | SE 10 | SE 13 | SE 12 | SE 13 | SE 13 | SE 13 | SE 6 | SE 11 | SE 12 | SE 13 |
Wave Graph | |||||||||||||||||||
31 | 33 | 33 | 23 | 41 | 42 | 42 | 58 | 57 | 142 | 87 | 39 | 88 | 87 | 58 | 38 | 46 | 49 | 46 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-on | glassy | glassy | on | cross-off | off | cross | cross-on | cross-on | cross-on | cross-off | cross | cross | cross | cross-off | cross-off | cross-off |
High Tide | 7:46AM1.04m | 8:25PM0.89m | 9:09AM1.00m | 3:15PM0.66m | 9:42PM0.83m | 3:54AM0.57m | 10:59PM0.84m | 12:00PM1.14m | 00:04AM0.91m | 1:02PM1.25m | 00:55AM1.01m | 1:50PM1.33m | 1:38AM1.12m | ||||||
Low Tide | 11:46PM0.41m | 12:22PM0.46m | 00:35AM0.47m | 1:24PM0.63m | 1:45AM0.53m | 5:51AM0.53m | 7:02PM0.49m | 6:42AM0.39m | 7:49PM0.43m | 7:22AM0.26m | 8:27PM0.42m | 7:54AM0.15m | 8:56PM0.43m | ||||||
— | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | |
— | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | |
mm | — | — | — | — | — | — | 1 | 1 | — | 1 | 1 | — | 3 | 2 | 1 | 1 | — | 1 | 4 |
Temp °C | 20 | 20 | 21 | 21 | 21 | 21 | 24 | 23 | 18 | 16 | 17 | 18 | 18 | 16 | 15 | 15 | 14 | 14 | 15 |
Feels °C | 21 | 20 | 22 | 23 | 21 | 21 | 24 | 22 | 15 | 13 | 17 | 17 | 19 | 13 | 11 | 12 | 12 | 11 | 14 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | SE 10 | ENE 8 | E 8 | ENE 5 | E 6 | E 6 | SE 6 | E 8 | E 8 | E 8 |
31 | 33 | 33 | 23 | 41 | 42 | 42 | 58 | 57 | 142 | 63 | 31 | 20 | 17 | 20 | 38 | 33 | 49 | 46 | |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 11 | SE 11 | SE 10 | SE 10 | SE 9 | SE 9 | SE 8 | SSE 10 | E 8 | SE 6 | SE 12 | SE 13 | SE 13 | SE 13 | E 7 | SE 5 | SE 12 | SE 13 |
22 | 19 | 18 | 16 | 15 | 14 | 3 | 3 | 10 | 57 | 15 | 39 | 88 | 87 | 58 | 24 | 10 | 47 | 44 | |
Swell 3 Height (m) Direction Period (s) | ESE 10 | E 11 | E 11 | — | SE 15 | SE 14 | SE 12 | SE 11 | — | — | SE 13 | SE 6 | ENE 8 | ENE 8 | E 8 | SE 12 | SE 11 | — | E 12 |
9 | 2 | 2 | — | 9 | 7 | 6 | 5 | — | — | 87 | 8 | 20 | 11 | 5 | 35 | 46 | — | 3 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NE 3 | — | SE 3 | — | ENE 8 | ENE 4 | — | SE 5 | SE 6 | — | — | SE 5 | SSE 3 |
— | — | — | — | — | — | 5 | — | 2 | — | 107 | 16 | — | 25 | 34 | — | — | 7 | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 11 | 33 | 0 | 54 | 0 | 0 | 367 | 128 | 4 | 52 | 0 | 80 | 129 | 61 | 0 | 28 | 28 |
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.











