Surf Forecasts:
Prainha surf forecast from 31 Jul 2026:
- Best quality surf: Saturday 1 Aug, 9AM (local time) - 3.5ft (1.1m), 6s period, ENE swell with glassy winds.
- Most powerful swell: Sunday 2 Aug, 3PM (local time) - 3ft (0.9m), 7s period, E swell with 88 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 9AM (local time) - 3.5ft (1.1m), 6s period with ENE 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 01) at 9AM. The primary swell is predicted to be 1.1m and 6s period with a secondary swell of 0.7m and 5s. Another secondary swell of 0.1m and 10s is also forecast. 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 7s and forecast to arrive on Sunday (Aug 02) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Saturday (Aug 01) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sat 1st Aug) | 3.5ft (1.1m) 6s |
| Best Surf | 9AM (Sat 1st Aug) | 3.5ft (1.1m) 6s |
| Most Powerful | 3PM (Sun 2nd Aug) | 3ft (0.9m) 7s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
G'day, I'm Rusty. Let's have a look at what's on offer for Prainha over the next couple of weeks.
Honestly, the next week is a bit of a write-off. There's a big gap of poor conditions before anything decent pops up. For the first few days, the swell is tiny, mostly around 2ft to 4ft from the east with a short, weak period. The combined energy is low, under 100 (weak) for most of that time. The wind is a mixed bag, with a few glassy moments early on the 1st of August morning, but the swell is too small and weak to bother with.
The real story starts from the 9th of August. A long-period groundswell from the southeast starts to fill in. The combined energy jumps up to 184 on Sunday the 9th morning (moderate wave energy), and it builds from there. By Monday the 10th of August morning, we're seeing 2ft of swell from the southeast with a very long period of 16 seconds, and the combined energy is up to 252 (moderate). The wind is light and cross-offshore from the south, keeping conditions clean. This is the standout of the forecast window. That long period will shape up nicely, and with a south swell direction being close to the optimum direction for Prainha, it should offer some proper lines. This spot is for advanced surfers only, and it can get crowded here sometimes, so expect company. The water temperature is 67°, which is a touch warmer than normal for this time of year.
That swell hangs around for the 10th, with similar conditions on Monday afternoon, though the forecast for the afternoon is a little more marginal. After that, the energy starts to fade through the second week, with smaller, weaker swells returning. There's a quick look at Saturday the 15th of August morning with glassy conditions and 2ft swell from the southeast, but the energy is only 100 (moderate). It's not a patch on the main event.
So, if you're an experienced surfer, circle Monday the 10th of August. That's your best shot for clean, punchy waves from a solid groundswell.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Sun morning, min 17°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 26mm), heaviest during Wed morning. Warm (max 20°C on Tue morning, min 17°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Fri 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | ||||||||||||||
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 13 | ENE 4 | ENE 6 | E 6 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | SSE 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 6 | 13 | 86 | 64 | 72 | 81 | 88 | 74 | 55 | 55 | 54 | 52 | 53 | 61 | 57 | 57 | 42 | 41 | 41 | 8 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | on | cross-on | off | cross | cross-off | glassy | on | cross-on | glassy | cross-on | cross-off | cross-on | glassy | cross-on | glassy | cross-on | cross-on |
High Tide | 4:25PM1.31m | 4:20AM1.32m | 5:03PM1.27m | 5:00AM1.28m | 5:44PM1.20m | 5:45AM1.21m | 6:29PM1.10m | 6:39AM1.12m | 7:21PM0.99m | 7:46AM1.04m | 8:25PM0.89m | 9:09AM1.00m | 3:15PM0.66m | 9:42PM0.83m | ||||||
Low Tide | 9:27PM0.33m | 9:51AM0.03m | 9:56PM0.33m | 10:23AM0.08m | 10:29PM0.34m | 10:57AM0.17m | 11:05PM0.37m | 11:36AM0.30m | 11:46PM0.41m | 12:22PM0.46m | 00:35AM0.47m | 1:24PM0.63m | 1:45AM0.53m | |||||||
 |  |  | |  | | | | | | | | |  |  |  | | | | | |
 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — |
 | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 21 | 3 | — | — | — | — |
Temp °C | 19 | 18 | 18 | 18 | 18 | 20 | 19 | 18 | 18 | 19 | 19 | 20 | 19 | 18 | 18 | 18 | 18 | 18 | 19 | 19 |
Feels °C | 17 | 17 | 19 | 18 | 18 | 20 | 18 | 18 | 20 | 19 | 19 | 21 | 19 | 19 | 20 | 20 | 20 | 18 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | SSE 5 | E 4 | E 5 | E 6 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 |
| kJ | 3 | 12 | 28 | 64 | 72 | 81 | 88 | 74 | 55 | 55 | 54 | 52 | 53 | 61 | 57 | 57 | 42 | 41 | 41 | 28 |
Swell 2 Height (m) Direction Period (s) | SE 13 | SSE 12 | SE 10 | SE 10 | S 10 | S 10 | S 10 | S 10 | — | E 13 | ESE 12 | ESE 11 | SE 12 | SE 11 | SE 11 | SE 10 | SSE 10 | SE 9 | SSE 9 | SSE 9 |
| kJ | 6 | 13 | 4 | 4 | 2 | 2 | 2 | 2 | — | 3 | 13 | 12 | 22 | 19 | 18 | 16 | 9 | 13 | 8 | 8 |
Swell 3 Height (m) Direction Period (s) | SE 9 | E 7 | — | S 10 | — | — | — | — | S 16 | — | S 13 | S 12 | SE 10 | SE 10 | ESE 11 | SE 11 | — | — | E 14 | SE 12 |
| kJ | 3 | 4 | — | 8 | — | — | — | — | 5 | — | 3 | 3 | 16 | 15 | 11 | 5 | — | — | 4 | 6 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 4 | ENE 6 | — | — | — | — | — | — | — | — | — | SE 2 | — | — | — | — | — | — | — |
| kJ | 15 | 13 | 86 | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 172 | 61 | 0 | 73 | 4 | 0 | 126 | 0 | 0 | 213 | 4 | 0 | 126 | 0 | 11 | 0 | 4 | 0 | 73 | 52 |
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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