Surf Forecasts:
Prainha surf forecast from 23 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 3AM (local time) - 3ft (0.9m), 16s period, SE swell with offshore winds.
- Most powerful swell: Wednesday 26 Aug, 3AM (local time) - 3ft (0.9m), 16s period, SE swell with 421 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 3AM (local time) - 2.5ft (0.7m), 14s 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 Tuesday (Aug 25) at 3AM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 0.1m 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 16s and forecast to arrive on Wednesday (Aug 26) at 3AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Thursday (Aug 27) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 25th Aug) | 2.5ft (0.7m) 14s |
| Best Surf | 3AM (Wed 26th Aug) | 3ft (0.9m) 16s |
| Most Powerful | 3AM (Wed 26th Aug) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's cookin' over the next couple of weeks.
Honestly, it's a bit of a slow start. We've got a few tiny waves around, but nothing that's really gonna get the heart pumping for the first few days. Things start to look a little more promising towards the back end of next week, but we've got to be patient.
For the first real standout, I'm looking at Wednesday morning, the 26th of August. At Prainha, we've got a clean 3ft swell coming out of the SE. The wind is light and cross-offshore, which is gonna keep those faces nice and smooth. The real story here is the energy – we're seeing a combined swell energy of 403 (moderate wave energy) and a long period of 15 seconds, meaning this is proper groundswell pushing through. That long period will wrap in nicely here. It's not a huge wave, but it'll be clean and lined up. Keep in mind, this is an advanced break and it's very consistent, and crowds are possible.
The next one to circle on the calendar is Thursday morning, the 27th of August. Conditions are looking glassy with zero wind from the West. It'll be a bit smaller again, at about 2ft from the SE, but with a 14-second period and 265 (moderate wave energy) in the water. For a small-wave board, this will be a fun, clean session.
Now, let's talk about the longer range. Looking ahead to Tuesday, the 1st of September. The afternoon session at Prainha is looking promising. We've got a 3ft swell from the ESE, and the wind is light cross-off from the WNW, cleaning it right up. The combined energy is 214 (moderate wave energy). It's a bit of a wait, but this one has potential.
Also, keep an eye on Friday morning, the 4th of September. It's a full week and a half out, so treat this one as a promising but less certain call, but the data is clean: 4ft from the ESE, glassy calm winds from the WSW, and a combined energy of 295 (moderate wave energy). Could be a sneaky good morning.
The water temperature is sitting around 69°F, which is much warmer than normal for this time of year. You won't need a thick suit, that's for sure.
So, my pick of the bunch is that Wednesday morning the 26th for the best mix of size, clean conditions, and proper energy. Long range, Friday the 4th of September is the one to dream on.
Keep your eyes on the horizon,
Rusty
Short Range ForecastMostly dry. Very mild (max 16°C on Sat afternoon, min 14°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Tue night. Warm (max 20°C on Thu afternoon, min 16°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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 10 | SE 10 | SE 12 | SE 13 | SE 14 | SE 14 | SE 15 | SE 14 | SE 13 | SE 13 | SE 16 | SE 15 | SE 15 | SE 15 | SE 14 | SE 13 | E 7 | E 8 | E 8 | E 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 106 | 80 | 36 | 106 | 192 | 308 | 330 | 198 | 142 | 138 | 366 | 365 | 355 | 301 | 195 | 173 | 77 | 146 | 201 | 220 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | glassy | cross-on | cross | cross | cross-on | cross-on | glassy | on | cross-on | cross-off | cross-on | glassy | glassy | on | cross-on | cross | cross-on | cross-off |
High Tide | 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 | |||||||
 |  |  | | |  | |  | | |  |  |  | | | |  | | | | |
 | — | — | 6:35 | — | — | 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 | — | — | — | — | — | — | — | — | — | — | 4 | 5 | 1 | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 15 | 15 | 16 | 15 | 15 | 16 | 16 | 17 | 18 | 17 | 18 | 18 | 19 | 20 | 20 | 20 | 21 | 20 |
Feels °C | 13 | 13 | 14 | 13 | 13 | 14 | 14 | 15 | 17 | 17 | 18 | 17 | 17 | 19 | 20 | 20 | 19 | 21 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 12 | SE 13 | SE 14 | SE 14 | SE 15 | SE 14 | SE 13 | SE 13 | SE 16 | SE 15 | SE 15 | ENE 6 | E 7 | E 7 | E 7 | E 8 | E 8 | E 9 |
| kJ | 106 | 80 | 36 | 106 | 192 | 308 | 330 | 198 | 142 | 138 | 366 | 365 | 355 | 62 | 70 | 74 | 77 | 146 | 201 | 220 |
Swell 2 Height (m) Direction Period (s) | ENE 8 | ENE 8 | SE 5 | E 7 | E 7 | E 7 | E 7 | E 7 | E 3 | SE 16 | ENE 4 | ENE 5 | E 5 | SE 15 | SE 14 | SE 13 | SE 13 | SE 12 | SE 12 | SE 11 |
| kJ | 23 | 13 | 6 | 4 | 1 | 1 | 1 | 1 | 1 | 11 | 5 | 17 | 28 | 301 | 195 | 173 | 57 | 50 | 21 | 18 |
Swell 3 Height (m) Direction Period (s) | — | — | E 8 | — | — | E 7 | — | — | E 7 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 4 | — | — | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SE 4 | — | — | — | — | ENE 6 | — | ENE 5 | ENE 6 | ENE 6 | — | — | — | — | — | — |
| kJ | — | — | — | — | 5 | — | — | — | — | 4 | — | 38 | 60 | 127 | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 182 | 52 | 11 | 128 | 61 | 61 | 28 | 4 | 0 | 33 | 4 | 0 | 28 | 0 | 0 | 73 | 4 | 4 | 61 | 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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