Surf Forecasts:
Prainha surf forecast from 10 Aug 2026:
- Best quality surf: Monday 10 Aug, 6AM (local time) - 5.5ft (1.7m), 13s period, SSE swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 6AM (local time) - 5.5ft (1.7m), 13s period, SSE swell with 938 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 6AM (local time) - 5.5ft (1.7m), 13s period with SSE 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 10) at 6AM. The primary swell is predicted to be 1.7m and 13s period with a secondary swell of 0.8m and 5s. Another secondary swell of 0.6m and 13s is also forecast. 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 13s and forecast to arrive on Monday (Aug 10) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 5s period and expected on Thursday (Aug 13) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 10th Aug) | 5.5ft (1.7m) 13s |
| Best Surf | 6AM (Mon 10th Aug) | 5.5ft (1.7m) 13s |
| Most Powerful | 6AM (Mon 10th Aug) | 5.5ft (1.7m) 13s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Hey, Rusty here. Let’s check the outlook for Prainha.
Overall, it’s a mellow couple of weeks. Swell stays small, mostly under 3 feet, and the energy is light for most of the run. The one day to circle is Sunday, August 23rd—that morning looks the best, with clean, glassy conditions and a fun 2–3 foot SE swell that has a bit more grunt. The wave energy jumps to 214, which is moderate, and with a 12-second period, the lines should be well-formed. Light offshore winds from the west will keep the surface smooth.
Before then, it’s mostly small and average. From the 10th through the 16th, you’re seeing tiny waves—1 to 2 feet—and mixed winds. Some mornings like the 11th, 12th, and 14th have clean, glassy conditions, but the height is barely enough to get moving. Afternoons get choppy with cross-on or onshore breezes. The 17th has a glassy afternoon window (2 feet, but only a 6-second period), so it’s short and weak.
From the 18th onward, it stays small and inconsistent. The 23rd is your best bet—early morning, 2–3 feet SE with a 12-second period, clean. That’s the session to aim for. After that, the 24th morning stays rideable but drops off again.
Water temp is normal for this time of year. Crowds can build when the surf is decent, especially on a Sunday, so plan to beat the rush.
Bottom line: mostly small and poor until the 22nd, then a solid morning on the 23rd worth getting wet for.
Rusty out.
Short Range ForecastLight rain (total 4mm), mostly falling on Sun night. Very mild (max 16°C on Wed afternoon, min 12°C on Mon afternoon). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Fri afternoon. Warm (max 20°C on Fri night, min 15°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 14 | SE 13 | SE 13 | SSE 7 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 12 | SE 16 | SE 15 | SE 13 | SE 13 | SE 15 | SE 13 | SE 12 | SE 12 | E 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 57 | 106 | 78 | 137 | 136 | 158 | 148 | 148 | 146 | 93 | 198 | 218 | 113 | 82 | 139 | 109 | 72 | 48 | 23 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | off | cross-off | cross-off | off | cross-on | cross | glassy | cross-on | glassy | glassy | cross-on | cross | off | cross-on | glassy |
High Tide | 00:55AM1.01m | 1:50PM1.33m | 1:38AM1.12m | 2:31PM1.37m | 2:16AM1.22m | 3:08PM1.36m | 2:52AM1.29m | 3:42PM1.32m | 3:27AM1.33m | 4:14PM1.26m | 4:02AM1.33m | 4:44PM1.18m | |||||||
Low Tide | 7:54AM0.15m | 8:56PM0.43m | 8:20AM0.06m | 9:12PM0.47m | 8:37AM0.01m | 8:59PM0.49m | 8:52AM-0.00m | 8:49PM0.45m | 9:11AM0.02m | 9:04PM0.38m | 9:33AM0.07m | 9:28PM0.32m | |||||||
 |  | |  |  | | | |  |  | |  | | |  |  | | | | |
 | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — |
 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — |
mm | 2 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 1 | 4 |
Temp °C | 14 | 13 | 13 | 14 | 14 | 14 | 13 | 15 | 16 | 16 | 17 | 18 | 18 | 19 | 19 | 20 | 20 | 19 | 19 |
Feels °C | 10 | 10 | 9 | 10 | 12 | 11 | 12 | 14 | 15 | 15 | 17 | 19 | 20 | 19 | 19 | 19 | 21 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SE 13 | SE 13 | SE 5 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 12 | SE 16 | SE 15 | SE 13 | SE 13 | SE 15 | SE 13 | E 7 | E 7 | E 7 |
| kJ | 57 | 106 | 78 | 32 | 136 | 158 | 148 | 148 | 146 | 93 | 198 | 218 | 113 | 82 | 139 | 109 | 26 | 24 | 23 |
Swell 2 Height (m) Direction Period (s) | E 7 | E 7 | E 8 | SE 13 | SE 5 | E 8 | E 8 | E 7 | E 7 | ENE 4 | ENE 5 | E 6 | E 6 | ENE 6 | E 6 | ENE 7 | SE 12 | SE 12 | SE 8 |
| kJ | 16 | 10 | 22 | 84 | 14 | 5 | 4 | 4 | 4 | 6 | 15 | 16 | 17 | 11 | 10 | 15 | 72 | 48 | 17 |
Swell 3 Height (m) Direction Period (s) | SE 14 | — | — | E 8 | E 8 | — | — | — | — | E 7 | — | — | — | — | — | — | — | E 16 | SE 11 |
| kJ | 47 | — | — | 11 | 5 | — | — | — | — | 1 | — | — | — | — | — | — | — | 5 | 18 |
Wind waves Height (m) Direction Period (s) | SE 5 | SE 5 | SE 5 | SSE 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 42 | 19 | 30 | 137 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 62 | 62 | 11 | 52 | 0 | 0 | 0 | 0 | 52 | 4 | 0 | 121 | 0 | 0 | 74 | 28 | 0 | 128 | 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)
Latest Updates
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Prainha surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest