Surf Forecasts:
Prainha surf forecast from 22 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 9AM (local time) - 3.5ft (1.0m), 16s period, SE swell with offshore winds.
- Most powerful swell: Wednesday 26 Aug, 9AM (local time) - 3.5ft (1.0m), 16s period, SE swell with 486 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 9AM (local time) - 2.5ft (0.8m), 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 Saturday (Aug 22) at 9AM. The primary swell is predicted to be 0.8m and 11s period. 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 1.0m 16s and forecast to arrive on Wednesday (Aug 26) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Wednesday (Aug 26) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sat 22nd Aug) | 2.5ft (0.8m) 11s |
| Best Surf | 9AM (Wed 26th Aug) | 3.5ft (1.0m) 16s |
| Most Powerful | 9AM (Wed 26th Aug) | 3.5ft (1.0m) 16s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright mate, here's the look for the next couple of weeks. It's a bit of a slow burn, with nothing really happening for the first couple of days.
The spot is Prainha. It's an advanced drop, very consistent, and exposed to the open ocean. The water is sitting at 69°F, which is a few degrees warmer than we'd normally see, so just a spring suit might do you.
Saturday (August 22nd) and Sunday (August 23rd) are flat. Saturday morning has a tiny 3ft SE swell, not much energy behind it, and a light cross-offshore breeze, but the waves are just ordinary. Sunday morning is practically a lake.
Monday the 24th brings a little life: a 3ft SE swell with moderate energy. But the wind is a light cross-shore, so it's not clean.
Then comes the standout. Wednesday the 26th of August. This is your day. We get a 3ft SE groundswell, with a period of 16 seconds, which is proper long-period energy. The combined energy is strong (525). The wind is glassy offshore in the morning and glassy calm in the afternoon. This is going to be clean, lined-up, beautiful surf for the advanced crew. Not too big, not too small, just right.
Thursday the 27th still has a clean morning, with glassy winds and a 3ft SE swell, but the energy drops.
After that, it's a long run of poor conditions from Friday the 28th all the way through to Tuesday the 1st of September. The swell hangs around, but the wind is mostly cross-onshore or onshore. It gets messy.
There's a brief spike on September 2nd with a 6ft SSE wind swell (strong energy at 576), but it's a short-period, bumpy wave with light onshore wind. That’s for the hardcore only.
The rest of the first week of September is tiny, with onshore winds and very little energy.
The easy call is Wednesday the 26th. That's the one to plan for.
- Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Sat night. Very mild (max 16°C on Sat morning, min 14°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Wed morning. Warm (max 20°C on Thu afternoon, min 14°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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) | SE 11 | SE 10 | SE 10 | SE 12 | SE 13 | SE 14 | SE 14 | SE 15 | SE 14 | SE 13 | SE 13 | SE 16 | SE 16 | SE 15 | SE 14 | SE 14 | SE 13 | SE 13 | E 7 | E 8 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 137 | 106 | 25 | 36 | 106 | 195 | 317 | 380 | 200 | 144 | 106 | 214 | 486 | 438 | 350 | 238 | 176 | 104 | 86 | 119 | 171 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | glassy | cross-on | cross-on | cross | cross-on | cross-on | cross-off | on | cross-on | off | glassy | cross-off | glassy | cross-on | cross-on | glassy | cross-on | cross-off |
High Tide | 11:24AM0.96m | 11:16PM0.86m | 12:24PM1.07m | 00:13AM0.98m | 1:05PM1.18m | 00:56AM1.11m | 1:41PM1.28m | 1:33AM1.23m | 2:15PM1.34m | 2:09AM1.33m | 2:48PM1.38m | 2:43AM1.39m | 3:22PM1.39m | ||||||||
Low Tide | 7:09PM0.56m | 6:44AM0.34m | 7:33PM0.48m | 7:14AM0.23m | 7:53PM0.42m | 7:40AM0.13m | 8:09PM0.38m | 8:02AM0.05m | 8:20PM0.34m | 8:21AM0.00m | 8:29PM0.31m | 8:40AM-0.03m | 8:43PM0.27m | ||||||||
 | |  | |  |  |  | |  | | | |  | | | | |  |  | |  | |
 | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — |
 | — | 5:57 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — |
mm | — | — | 3 | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | 1 | — | 1 |
Temp °C | 16 | 16 | 15 | 15 | 15 | 16 | 15 | 16 | 16 | 16 | 17 | 18 | 17 | 18 | 18 | 18 | 20 | 20 | 20 | 20 | 19 |
Feels °C | 14 | 14 | 13 | 14 | 13 | 13 | 14 | 14 | 14 | 15 | 16 | 17 | 19 | 20 | 17 | 18 | 20 | 20 | 21 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SE 10 | SE 5 | SE 12 | SE 13 | SE 14 | SE 14 | SE 15 | SE 14 | SE 13 | SE 13 | SE 16 | SE 16 | SE 15 | SE 14 | SE 14 | E 7 | E 7 | E 7 | E 8 | E 8 |
| kJ | 137 | 106 | 11 | 36 | 106 | 195 | 317 | 380 | 200 | 144 | 106 | 214 | 486 | 438 | 350 | 238 | 43 | 61 | 86 | 119 | 171 |
Swell 2 Height (m) Direction Period (s) | E 8 | ENE 8 | SE 10 | SE 5 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | SE 16 | SE 12 | ENE 4 | ENE 5 | ENE 6 | E 6 | SE 13 | SE 13 | SE 12 | SE 12 | SE 11 |
| kJ | 33 | 23 | 25 | 6 | 4 | 1 | 1 | 1 | 1 | 1 | 11 | 71 | 12 | 30 | 50 | 51 | 176 | 104 | 51 | 21 | 18 |
Swell 3 Height (m) Direction Period (s) | — | — | ENE 8 | E 7 | — | — | E 7 | — | — | — | E 6 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 13 | 4 | — | — | 4 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SE 2 | SE 4 | — | — | — | — | — | ENE 3 | ENE 5 | ENE 6 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 1 | 5 | — | — | — | — | — | 2 | 39 | 77 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 182 | 52 | 11 | 128 | 52 | 28 | 59 | 33 | 0 | 73 | 28 | 0 | 0 | 0 | 0 | 73 | 4 | 0 | 207 | 0 |
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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