Surf Forecasts:
Prainha surf forecast from 14 Aug 2026:
- Best quality surf: Saturday 15 Aug, 12AM (local time) - 2ft (0.6m), 13s period, SE swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 12AM (local time) - 6ft (1.9m), 8s period, E swell with 432 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 12AM (local time) - 2ft (0.6m), 13s 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 Saturday (Aug 15) at 12AM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.9m and 8s. 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 1.9m 8s and forecast to arrive on Sunday (Aug 16) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Thursday (Aug 20) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sat 15th Aug) | 2ft (0.6m) 13s |
| Best Surf | 12AM (Sat 15th Aug) | 2ft (0.6m) 13s |
| Most Powerful | 12AM (Sun 16th Aug) | 6ft (1.9m) 8s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, Rusty here. Let's take a look at what we've got coming up for Prainha.
It's a bit of a slow burn for the next week or so. We've got a lot of days with small swell and iffy winds, so don't expect much to get excited about right away. The water is sitting at 68°, which is a touch warmer than normal for this time of year, so at least the wait will be comfortable.
From Friday the 14th through to around Monday the 24th of August, the surf is pretty lackluster. We're looking at small waves, mostly around 2 ft to 4 ft, with a lot of cross-off or onshore winds. There's a real stretch of poor conditions in there, especially from the 16th through the 19th, where the NE wind is blowing straight onshore and making a mess of things. There's a brief moment on the morning of Tuesday the 18th with glassy conditions and a clean 3 ft wave, but it's from a short period E swell (8 seconds) and the energy is weak (150). It’s surfable, but nothing special.
The real standout is going to be Monday the 24th through Tuesday the 25th. On Monday afternoon (24th), the wind goes glassy and we get a jump in swell energy to 415 (moderate). That SE swell at 4 ft with a long 13-second period will be pushing in clean and lined up. This is your best window for a proper session.
Then, Tuesday morning (25th) brings the best of the lot. We've got a 4 ft SSE groundswell with a solid 12-second period and a combined energy of 503 (strong). The wind is light and cross-off from the SW. That’s a recipe for some clean, punchy waves at an exposed spot like this. The swell direction isn't a perfect match for the optimum S direction, but it's close enough, and the overall quality is the best we'll see. This one is for the advanced crew, as it's a solid size for this break.
After that, the energy drops back down, and we're into a similar pattern of small, choppy days until the end of the forecast window. There's a final decent looking morning on Friday the 28th with a clean 3 ft ESE swell and light offshore wind from the WSW, but it's not as strong as the mid-week pulse.
So, to sum it up: the first week and a half is a write-off. Hold out for Monday afternoon the 24th, and definitely be in the water for Tuesday morning the 25th. That's the main event.
- Rusty
Short Range ForecastHeavy rain (total 43mm), heaviest during Fri night. Very mild (max 19°C on Sat night, min 17°C on Fri afternoon). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Thu morning, min 18°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Fri 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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 14 | SE 13 | ESE 8 | ESE 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 8 | E 9 | E 8 | E 8 | E 8 | E 8 | E 7 | E 7 | E 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 125 | 111 | 149 | 131 | 432 | 203 | 167 | 185 | 257 | 274 | 224 | 142 | 148 | 116 | 84 | 80 | 55 | 66 | 62 | 71 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-on | on | on | on | cross | on | cross-on | glassy | cross-on | cross-off | glassy | cross-on | glassy | off | cross | cross-off |
High Tide | 4:14PM1.26m | 4:02AM1.33m | 4:44PM1.18m | 4:38AM1.28m | 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 | ||||||
Low Tide | 9:04PM0.38m | 9:33AM0.07m | 9:28PM0.32m | 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 | |||||||
 |  |  | |  |  | |  |  | |  |  | | | | | | | |  | |
 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — |
 | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — |
mm | 3 | 37 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 21 | 24 | 21 | 23 | 23 | 23 | 28 | 28 | 23 |
Feels °C | 15 | 16 | 19 | 20 | 19 | 19 | 20 | 19 | 21 | 19 | 20 | 22 | 26 | 21 | 24 | 23 | 23 | 28 | 28 | 21 |
Swell 1 Height (m) Direction Period (s) | SE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 8 | E 9 | E 8 | E 8 | E 8 | E 8 | E 7 | E 7 | E 8 |
| kJ | 79 | 98 | 149 | 131 | 183 | 203 | 167 | 185 | 257 | 274 | 224 | 142 | 148 | 116 | 84 | 80 | 55 | 66 | 62 | 71 |
Swell 2 Height (m) Direction Period (s) | SE 14 | SE 13 | SE 12 | SE 12 | SSE 11 | E 14 | SE 10 | SSE 10 | SSE 10 | SE 10 | SSE 9 | SSE 9 | SSE 9 | SE 8 | S 8 | E 13 | SE 7 | SSE 7 | SE 6 | SSE 5 |
| kJ | 125 | 111 | 52 | 49 | 103 | 4 | 17 | 10 | 10 | 24 | 9 | 8 | 8 | 3 | 1 | 3 | 2 | 4 | 2 | 15 |
Swell 3 Height (m) Direction Period (s) | ENE 6 | — | — | E 16 | — | E 13 | E 13 | E 13 | — | — | SE 10 | — | — | S 10 | — | SE 13 | E 13 | E 12 | E 12 | S 16 |
| kJ | 6 | — | — | 5 | — | 13 | 3 | 3 | — | — | 4 | — | — | 2 | — | 7 | 3 | 3 | 3 | 5 |
Wind waves Height (m) Direction Period (s) | SE 7 | — | — | — | E 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 5 |
| kJ | 118 | — | — | — | 432 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 42 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 2 | 0 | 0 | 0 | 40 | 73 | 73 | 73 | 4 | 73 | 4 | 0 | 73 | 0 | 0 | 4 | 0 | 0 | 52 | 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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