Surf Forecasts:
Prainha surf forecast from 16 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 12AM (local time) - 3ft (0.9m), 8s period, E swell with glassy winds.
- Most powerful swell: Monday 17 Aug, 3PM (local time) - 4ft (1.2m), 8s period, E swell with 195 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 12AM (local time) - 3ft (0.9m), 8s 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 19) at 12AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.1m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.2m 8s and forecast to arrive on Monday (Aug 17) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 5s period and expected on Friday (Aug 21) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 19th Aug) | 3ft (0.9m) 8s |
| Best Surf | 12AM (Wed 19th Aug) | 3ft (0.9m) 8s |
| Most Powerful | 3PM (Mon 17th Aug) | 4ft (1.2m) 8s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
G’day, Rusty here. We’ve got a bit of a mixed bag shaping up for the Prainha area over the next couple of weeks. The first real standout is set for Sunday morning, August 16th. It’s not massive, but the conditions will be sweet. We’re looking at a clean 1.2m east swell, with glassy conditions thanks to light northwesterly winds. The water’s sitting at 20°, which is a touch warmer than normal for this time of year. It’s not a full-on groundswell, but the combo energy is moderate (203) and everything lines up for some fun, clean waves. It’s a very consistent spot, which means plenty of waves, but also means you might have some company.
After that Sunday morning window, things go quiet again for a pretty long stretch. The east swell drops off and the winds turn onshore or cross-shore for most of the following week and a half. There are a few moments of light offshore winds or glass, but the swell energy is too weak to get excited about—mostly under 1m and in the weak energy range.
The next real glimmer of hope is on Tuesday morning, August 25th. We get a bit more size at 1.1m, this time from the SSE, with a period of 9 seconds and moderate combined energy (249). More importantly, we’ve got a light west-southwest offshore wind. That means clean conditions and nicely groomed surf at the exposed banks. It won’t be huge, but it’ll be a quality window for the intermediate to advanced crew.
After that, the run continues a bit patchy. Through the end of August and into the first days of September, the swell remains mostly small and the winds not ideal. There might be the odd glassy morning, like on August 31st, but the surf will be tiny at 0.5m.
So, to sum it up: this forecast has a clear gap of several days with not much happening. The standout periods are first thing Sunday the 16th, and then Tuesday the 25th. If you can get out for those clean, offshore mornings at Prainha, you’ll find it worthwhile. Otherwise, it’s a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Tue night, min 18°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Wed morning, min 16°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | SE 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 172 | 164 | 167 | 181 | 195 | 163 | 129 | 133 | 108 | 82 | 76 | 54 | 41 | 40 | 17 | 59 | 51 | 57 | 41 | 57 | 47 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-on | cross-on | on | cross-on | cross | on | glassy | glassy | cross-on | off | glassy | on | cross-on | off | cross | cross | cross | cross-on | cross |
High Tide | 5:12PM1.10m | 5:17AM1.19m | 5:41PM1.02m | 6:01AM1.08m | 6:13PM0.94m | 6:57AM0.97m | 6:56PM0.85m | 8:16AM0.89m | 3:35PM0.79m | 8:15PM0.78m | 4:21AM0.59m | 3:08PM0.78m | 9:53PM0.78m | 11:24AM0.96m | 11:16PM0.86m | ||||||
Low Tide | 9:59AM0.15m | 9:59PM0.28m | 10:27AM0.25m | 10:32PM0.27m | 10:56AM0.37m | 11:08PM0.31m | 11:29AM0.50m | 11:50PM0.37m | 12:09PM0.63m | 6:01PM0.74m | 5:01AM0.59m | 1:12PM0.76m | 6:41PM0.65m | 6:06AM0.46m | 7:09PM0.56m | ||||||
 | |  |  |  |  | | | | | |  | | | | | | | | |  | |
 | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — |
 | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 |
Temp °C | 18 | 19 | 19 | 20 | 20 | 19 | 21 | 23 | 24 | 23 | 22 | 18 | 18 | 19 | 21 | 23 | 23 | 19 | 16 | 15 | 15 |
Feels °C | 20 | 20 | 19 | 22 | 21 | 19 | 22 | 24 | 25 | 24 | 23 | 18 | 20 | 20 | 23 | 20 | 19 | 18 | 14 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | E 5 | E 7 | E 7 | E 8 | E 8 | E 8 | ENE 8 |
| kJ | 172 | 164 | 167 | 181 | 195 | 163 | 129 | 133 | 108 | 82 | 76 | 54 | 41 | 40 | 11 | 59 | 51 | 57 | 41 | 57 | 19 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 11 | SE 10 | SSE 10 | SE 10 | SSE 9 | SSE 9 | SE 9 | SE 8 | SE 8 | E 13 | E 13 | SSE 4 | SE 8 | E 7 | SE 6 | SE 6 | ESE 4 | SSE 5 | SSE 11 | — |
| kJ | 18 | 18 | 17 | 10 | 4 | 8 | 8 | 3 | 3 | 3 | 3 | 3 | 1 | 2 | 17 | 1 | 1 | 3 | 2 | 12 | — |
Swell 3 Height (m) Direction Period (s) | E 13 | E 13 | E 13 | E 12 | — | — | — | S 9 | E 14 | SE 8 | SE 8 | S 12 | SE 10 | E 12 | SSE 7 | E 11 | — | SSE 10 | SE 11 | — | — |
| kJ | 13 | 14 | 3 | 3 | — | — | — | 2 | 4 | 2 | 2 | 3 | 4 | 3 | 4 | 3 | — | 9 | 4 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SSE 3 | — | — | — | SSW 2 | SSW 3 | — | — | SE 5 | SE 5 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | 1 | 1 | — | — | 1 | 47 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 96 | 4 | 4 | 96 | 4 | 4 | 73 | 0 | 0 | 128 | 0 | 11 | 73 | 52 | 0 | 52 | 52 | 61 | 121 | 61 |
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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