Surf Forecasts:
Prainha surf forecast from 3 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 3AM (local time) - 2ft (0.6m), 7s period, E swell with glassy winds.
- Most powerful swell: Monday 10 Aug, 3AM (local time) - 5ft (1.6m), 8s period, SE swell with 338 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 3AM (local time) - 2ft (0.6m), 7s 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 Wednesday (Aug 05) at 3AM. The primary swell is predicted to be 0.6m and 7s period with a secondary swell of 0.3m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.6m 8s and forecast to arrive on Monday (Aug 10) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Saturday (Aug 08) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 5th Aug) | 2ft (0.6m) 7s |
| Best Surf | 3AM (Wed 5th Aug) | 2ft (0.6m) 7s |
| Most Powerful | 3AM (Mon 10th Aug) | 5ft (1.6m) 8s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, let's get down to business. The surf report for the next couple of weeks is a tale of two weeks. We're starting off flat, and it's going to be a slow grind to get things going.
The first few days are a write-off for anything decent. The swell energy is weak, just 42 to 55, which is barely a ripple. The winds are light, but there's just no size. You'll be waiting until at least the 5th for anything that's even surfable, and even then, it’s pretty marginal. There's a real lull here, a few days of nothing.
The action doesn't really kick off until Monday, the 10th of August. The morning session is still a bit so-so, but the afternoon is a different story. The swell builds to 7ft from the SSE, and the energy numbers just explode to 711. That's a serious jolt of power. With light winds expected, Prainha is going to be handling this really well. This is the day to make your plans around.
The 10th is the clear winner, but the 12th deserves a mention too. There's another surge of energy (722) with a 6ft SSE swell. It's a similar setup, but the window is tighter. The morning looks clean with a cross-off breeze, but the wind changes to the southeast in the afternoon and chops it up. It's a real hit-and-run opportunity.
The second week is a lot less certain. There's a long-period swell coming through around the 14th, but the wind and the break conditions just don't seem to align for it. It's one of those frustrating times where there's energy in the water but nowhere for it to go. We're looking at a lot of small, onshore slop after that. The 16th morning has a bit of size at 4ft and light offshore winds, but it's not in the same league as the 10th. It's more of a “maybe” than a “must.”
The water is running a touch warmer than average, about 1° above normal, so it might feel a bit more comfortable than you expect.
Bottom line: The afternoon of the 10th of August is your best shot by a long way, with the 12th morning as a solid back-up. Be patient, pick your window, and be ready.
Rusty.
Short Range ForecastSome drizzle, heaviest during Wed night. Warm (max 21°C on Wed morning, min 17°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Thu morning. Warm (max 23°C on Thu morning, min 16°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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 7 | E 7 | ESE 12 | SE 12 | SE 12 | SE 12 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | SE 15 | E 8 | SE 12 | SE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 38 | 37 | 13 | 23 | 37 | 49 | 34 | 33 | 36 | 60 | 60 | 60 | 57 | 57 | 41 | 63 | 64 | 84 | 64 | 50 | 235 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-on | glassy | on | cross | glassy | on | glassy | cross-off | on | cross | cross-off | cross-on | cross | cross-off | on | glassy | cross | cross | cross |
High Tide | 6:29PM1.10m | 6:39AM1.12m | 7:21PM0.99m | 7:46AM1.04m | 8:25PM0.89m | 9:09AM1.00m | 3:15PM0.66m | 9:42PM0.83m | 3:54AM0.57m | 10:59PM0.84m | 12:00PM1.14m | 00:04AM0.91m | 1:02PM1.25m | 00:55AM1.01m | |||||||
Low Tide | 10:57AM0.17m | 11:05PM0.37m | 11:36AM0.30m | 11:46PM0.41m | 12:22PM0.46m | 00:35AM0.47m | 1:24PM0.63m | 1:45AM0.53m | 5:51AM0.53m | 7:02PM0.49m | 6:42AM0.39m | 7:49PM0.43m | 7:22AM0.26m | 8:27PM0.42m | |||||||
 | |  |  | | |  | |  |  | | | | |  | | | |  | | | |
 | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — |
 | — | 5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — |
mm | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | 1 | 3 | — | — | 1 | 1 | 1 | 5 |
Temp °C | 19 | 19 | 19 | 20 | 20 | 20 | 21 | 20 | 21 | 23 | 23 | 22 | 22 | 20 | 17 | 18 | 19 | 19 | 17 | 16 | 15 |
Feels °C | 20 | 19 | 19 | 21 | 20 | 21 | 22 | 20 | 21 | 22 | 23 | 21 | 24 | 21 | 14 | 18 | 21 | 21 | 13 | 13 | 10 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 |
| kJ | 38 | 37 | 26 | 23 | 23 | 32 | 34 | 33 | 36 | 60 | 60 | 60 | 57 | 57 | 41 | 63 | 64 | 61 | 64 | 50 | 37 |
Swell 2 Height (m) Direction Period (s) | SSE 4 | SE 12 | ESE 12 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 10 | SE 10 | SE 9 | SSE 9 | SE 8 | SE 8 | SE 8 | SSE 5 | SE 5 | SE 15 | SE 13 | SE 12 | E 14 |
| kJ | 2 | 6 | 13 | 21 | 37 | 49 | 19 | 18 | 16 | 15 | 13 | 8 | 3 | 3 | 3 | 19 | 7 | 84 | 61 | 39 | 4 |
Swell 3 Height (m) Direction Period (s) | E 11 | E 10 | S 13 | S 12 | SE 10 | ESE 10 | E 11 | — | — | SE 15 | SE 14 | SE 12 | SE 11 | SSE 10 | — | SE 9 | SE 12 | — | — | SE 15 | — |
| kJ | 2 | 2 | 3 | 3 | 17 | 9 | 2 | — | — | 9 | 7 | 6 | 5 | 10 | — | 3 | 23 | — | — | 8 | — |
Wind waves Height (m) Direction Period (s) | — | — | NNE 2 | — | — | — | — | — | — | — | — | — | — | — | SE 4 | — | — | — | — | — | SE 7 |
| kJ | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | 19 | — | — | — | — | — | 235 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 88 | 40 | 11 | 73 | 4 | 0 | 73 | 0 | 0 | 73 | 4 | 0 | 68 | 61 | 0 | 54 | 0 | 133 | 129 | 129 |
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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