Surf Forecasts:
Prainha surf forecast from 21 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 12AM (local time) - 3ft (0.9m), 16s period, SE swell with glassy winds.
- Most powerful swell: Saturday 22 Aug, 12AM (local time) - 5.5ft (1.7m), 10s period, SSE swell with 551 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 12PM (local time) - 2.5ft (0.8m), 17s 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 (Aug 24) at 12PM. The primary swell is predicted to be 0.8m and 17s period with a secondary swell of 0.6m and 4s. 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 1.7m 10s and forecast to arrive on Saturday (Aug 22) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 7s period and expected on Thursday (Aug 27) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Mon 24th Aug) | 2.5ft (0.8m) 17s |
| Best Surf | 12AM (Wed 26th Aug) | 3ft (0.9m) 16s |
| Most Powerful | 12AM (Sat 22nd Aug) | 5.5ft (1.7m) 10s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright folks, let’s get real about Prainha for the next couple weeks. It’s a bit of a slow roll, but there are a couple days that’ll make the drive worth it.
We’re startin’ off now, Friday the 21st of August, and it’s flat. Like, real flat. A tiny 0.3ft dribble from the east with a long 11-second period, but barely a whisper of power (combined energy of 3). The wind is cross-offshore, but there’s just no water to surf. Saturday the 22nd ain’t any better, a 2ft southeast swell but it’s cross-onshore and choppy. Same story Sunday the 23rd, small and clean but still tiny.
Monday the 24th, we get a little bump. A 3ft southeast groundswell with a nice 14-second period, kickin’ up 247 units of energy. It’s a bit onshore, so only a marginal call, but it’s a start.
Tuesday the 25th is where the first real joy comes in. A 2ft southeast groundswell, 13-second period, and the afternoon goes glassy. It’s small, but when it’s that clean and the sets are comin’ in, it can be a real fun session. Water temp is about average, nothin’ unusual.
Now, the big highlight for this first stretch is Wednesday the 26th of August. A proper 3ft southeast groundswell, 15-second period, crankin’ out 325 units of energy. The wind is offshore from the WSW in the morning, so it’s gonna be picture-perfect, clean waves. This is the best window of the first week. It’s an advanced wave here at Prainha, exposed to the south, and on a swell like that, expect a few other locals out.
Thursday the 27th starts glassy with a 3ft southeast groundswell (241 combined energy), a real gem for a dawn patrol, but the afternoon gets bumpy.
After that, we hit a rough patch. Friday the 28th through Sunday the 30th sees some 3ft to 3ft windswell from the east, but the period is short (8-9 seconds) and the wind is all over the place. It’s surfable, but it’s ordinary. Monday the 31st has a bit of light rain but a clean 3ft east swell, still short-period though.
Into the second week, Tuesday morning the 1st of September has a strong offshore breeze cleanin’ up a 2ft east swell, but it’s still nothin’ to write home about. The standout here is Wednesday the 2nd of September. A nice 3ft southeast groundswell (10-second period) with a light offshore wind. Clean, 201 units of energy, and a real solid, fun day.
The last real gem comes on Friday the 4th of September. A glassy morning with a 3ft southeast groundswell, 12-second period, pumpin’ 241 units of energy. That’s another early morning session that’ll be worth gettin’ up for. After that, the wind swings around and it gets chopped up again.
So, the bottom line: The first week is lean, with Wednesday the 26th bein’ the clear winner. The second week has a couple of promising days, especially Wednesday the 2nd and Friday the 4th, but it’s not a guarantee. Stay patient, and keep an eye on the forecast.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sat morning. Warm (max 22°C on Thu night, min 14°C on Sat night). Winds decreasing (fresh winds from the SW on Thu night, light winds from the ESE by Sat night). | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Wed afternoon, min 14°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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 11 | E 7 | SSE 10 | SE 10 | SE 10 | SE 10 | SE 12 | SE 13 | SE 13 | SE 14 | SE 16 | SE 15 | SE 14 | SE 13 | SE 16 | SE 15 | SE 14 | SE 15 |
Wave Graph | |||||||||||||||||||
38 | 2 | 24 | 551 | 108 | 102 | 25 | 37 | 106 | 144 | 234 | 492 | 301 | 153 | 140 | 376 | 309 | 281 | 335 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-off | cross-on | cross | cross | cross-on | on | off | glassy | glassy | off | cross | cross-off |
High Tide | 4:21AM0.59m | 3:08PM0.78m | 9:53PM0.78m | 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 | ||||||
Low Tide | 00:45AM0.47m | 5:01AM0.59m | 1:12PM0.76m | 6:41PM0.65m | 6:06AM0.46m | 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 | |||||
— | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | |
— | — | 5:55 | — | — | 5:57 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | |
mm | — | — | — | — | 1 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 21 | 22 | 16 | 15 | 15 | 15 | 15 | 16 | 15 | 14 | 15 | 15 | 15 | 16 | 16 | 17 | 18 | 17 |
Feels °C | 19 | 16 | 18 | 12 | 13 | 12 | 13 | 14 | 14 | 11 | 12 | 14 | 14 | 15 | 16 | 17 | 16 | 17 | 19 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 7 | SE 5 | SE 10 | SE 10 | SE 5 | SE 5 | SE 13 | SE 13 | SE 14 | SE 16 | SE 15 | SE 14 | SE 13 | SE 16 | SE 15 | SE 14 | SE 15 |
38 | 25 | 24 | 31 | 108 | 102 | 11 | 6 | 106 | 144 | 234 | 492 | 301 | 153 | 140 | 257 | 309 | 281 | 335 | |
Swell 2 Height (m) Direction Period (s) | SE 5 | SE 5 | SE 9 | E 8 | E 8 | ENE 8 | SE 10 | SE 12 | E 7 | E 7 | E 7 | E 7 | E 7 | ENE 5 | ENE 4 | SE 16 | E 8 | — | — |
3 | 1 | 3 | 44 | 33 | 22 | 25 | 37 | 4 | 1 | 1 | 1 | 1 | 2 | 1 | 376 | 1 | — | — | |
Swell 3 Height (m) Direction Period (s) | E 12 | E 11 | SE 6 | SE 10 | — | — | ENE 8 | E 7 | — | — | — | — | — | E 6 | E 6 | — | — | — | — |
3 | 2 | 1 | 54 | — | — | 12 | 4 | — | — | — | — | — | 1 | 1 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SW 3 | SSW 3 | SSE 10 | — | — | — | — | — | SE 4 | SE 4 | — | — | — | — | ENE 4 | E 5 | ENE 5 | ENE 6 |
— | 2 | 1 | 551 | — | — | — | — | — | 13 | 12 | — | — | — | — | 3 | 15 | 36 | 100 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 11 | 61 | 61 | 52 | 52 | 129 | 61 | 33 | 182 | 61 | 61 | 28 | 28 | 0 | 0 | 0 | 0 | 58 | 0 |
Best forecast wave conditions in Santa Catarina - Norte | |||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











