Surf Forecasts:
Prainha surf forecast from 7 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 6AM (local time) - 2.5ft (0.7m), 14s period, SE swell with offshore winds.
- Most powerful swell: Monday 10 Aug, 12PM (local time) - 3.5ft (1.1m), 13s period, SE swell with 451 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 9AM (local time) - 2ft (0.6m), 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 (Aug 07) at 9AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.1m and 8s. 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 1.1m 13s and forecast to arrive on Monday (Aug 10) at 12PM. Winds are predicted to be cross-offshore 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 6PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 7th Aug) | 2ft (0.6m) 8s |
| Best Surf | 6AM (Wed 12th Aug) | 2.5ft (0.7m) 14s |
| Most Powerful | 12PM (Mon 10th Aug) | 3.5ft (1.1m) 13s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, let's chew the fat on what Prainha's got for us. Over the next couple of weeks, we're looking at a slow start before things get serious.
The water's running a touch warmer than normal for this time of year, but the surf is slow to get going. We've got a solid gap of about five days with nothing worth paddling out for. From the 7th through to the morning of the 12th, it's mostly small, weak, and messy. Friday the 7th morning is clean with a 2ft east swell, but the 8-second period means it's limp. Saturday and Sunday are a lost cause with bumpy winds.
Wednesday the 12th morning is the first time I'd get my wetsuit on. A 2ft southeast swell with a 14-second period and a clean offshore wind makes for a decent, if small, session.
The real standout, the one for the big dogs, is Tuesday the 18th of August. The morning session is packing a 12ft east swell with a 10-second period. The combined energy is a massive 2992. The wind is a clean offshore from the west, so the face will be smooth. But listen to me – this is expert territory only. That's too much water for any beginner or intermediate surfer. The afternoon drops to 8ft but stays clean, giving excellent conditions for those who can handle it.
Wednesday the 19th morning is another option for the crew with skills, with a 6ft east-southeast swell and a clean cross-offshore breeze. It's powerful but a bit more manageable than the day before.
For a quieter, smaller day with perfect conditions, Friday the 21st morning offers 4ft from the east-southeast and a 10-second period, with totally glassy conditions. That's a beautiful window for a longboard or a funboard.
Crowds are a possibility here, it's a well-known advanced break that gets some company when the swell is on.
So, the first week is a write-off. The second week brings the thunder, with the 18th through the 20th offering the biggest, cleanest waves, but only for the experienced crew.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Sun morning. Warm (max 25°C on Fri morning, min 13°C on Sun night). Winds decreasing (fresh winds from the SE on Fri afternoon, calm by Sat night). | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Tue afternoon. Very mild (max 15°C on Mon night, min 12°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 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) | E 8 | E 8 | SE 10 | SE 15 | SE 16 | SE 14 | SE 14 | SE 14 | SE 6 | SE 13 | SE 13 | SE 13 | SE 12 | SE 13 | SE 12 | SE 14 | SE 12 | SE 12 | SE 12 | SE 15 | SE 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 43 | 42 | 48 | 83 | 163 | 93 | 70 | 65 | 89 | 331 | 84 | 60 | 74 | 80 | 120 | 198 | 126 | 92 | 66 | 75 | 245 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | cross-on | off | cross-off | cross | cross | cross-off | cross-off | cross | cross-off | glassy | off | off | cross-off | glassy | glassy | on | cross |
High Tide | 10:39AM1.03m | 10:59PM0.84m | 12:00PM1.14m | 00:04AM0.91m | 1:02PM1.25m | 00:55AM1.01m | 1:50PM1.33m | 1:38AM1.12m | 2:31PM1.37m | 2:16AM1.22m | 3:08PM1.36m | 2:52AM1.29m | 3:42PM1.32m | ||||||||
Low Tide | 7:02PM0.49m | 6:42AM0.39m | 7:49PM0.43m | 7:22AM0.26m | 8:27PM0.42m | 7:54AM0.15m | 8:56PM0.43m | 8:20AM0.06m | 9:12PM0.47m | 8:37AM0.01m | 8:59PM0.49m | 8:52AM-0.00m | 8:49PM0.45m | ||||||||
 | |  |  |  |  |  | |  | | | | |  |  | | | | | | | |
 | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — |
 | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — |
mm | 1 | 4 | — | — | — | 7 | 5 | 2 | 1 | — | — | — | — | 9 | 8 | — | — | — | — | — | 7 |
Temp °C | 25 | 17 | 16 | 17 | 18 | 19 | 16 | 15 | 15 | 14 | 14 | 15 | 14 | 13 | 13 | 13 | 14 | 15 | 17 | 19 | 19 |
Feels °C | 26 | 13 | 13 | 16 | 18 | 22 | 13 | 11 | 11 | 9 | 9 | 10 | 12 | 13 | 13 | 12 | 14 | 16 | 18 | 19 | 20 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | SE 5 | E 8 | SE 16 | E 5 | E 6 | E 7 | E 7 | E 9 | E 8 | SE 13 | SE 5 | SE 13 | SE 12 | SE 14 | SE 12 | E 5 | E 5 | E 6 | SE 16 |
| kJ | 43 | 42 | 29 | 43 | 163 | 17 | 15 | 32 | 14 | 56 | 33 | 60 | 20 | 80 | 120 | 198 | 126 | 20 | 20 | 16 | 245 |
Swell 2 Height (m) Direction Period (s) | SE 8 | — | E 8 | SE 5 | SE 5 | SE 14 | SE 14 | SE 14 | E 7 | — | SE 13 | E 8 | SE 12 | SE 5 | E 5 | E 4 | E 5 | SE 12 | SE 12 | SE 12 | E 6 |
| kJ | 3 | — | 41 | 10 | 4 | 93 | 70 | 46 | 24 | — | 84 | 11 | 74 | 6 | 4 | 9 | 11 | 92 | 66 | 47 | 18 |
Swell 3 Height (m) Direction Period (s) | SE 11 | — | SE 10 | SE 15 | — | ENE 7 | E 7 | — | E 13 | — | — | E 12 | E 8 | E 5 | E 7 | E 7 | E 7 | — | SE 15 | SE 15 | SE 7 |
| kJ | 5 | — | 48 | 83 | — | 11 | 10 | — | 3 | — | — | 3 | 11 | 4 | 4 | 4 | 4 | — | 36 | 75 | 7 |
Wind waves Height (m) Direction Period (s) | — | SE 3 | — | — | E 8 | — | SE 5 | SSE 6 | SE 6 | SE 13 | SSE 6 | SE 5 | — | — | — | — | — | — | — | — | — |
| kJ | — | 4 | — | — | 57 | — | 38 | 65 | 89 | 331 | 55 | 38 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 204 | 128 | 4 | 4 | 0 | 210 | 129 | 129 | 129 | 61 | 61 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 33 | 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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