Surf Forecasts:
Prainha surf forecast from 9 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 12AM (local time) - 4ft (1.2m), 6s period, SSE swell with cross-offshore winds.
- Most powerful swell: Friday 14 Aug, 3PM (local time) - 3.5ft (1.0m), 14s period, SSE swell with 419 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 12AM (local time) - 1.5ft (0.5m), 14s 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 Sunday (Aug 09) at 12AM. The primary swell is predicted to be 0.5m and 14s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.0m 14s and forecast to arrive on Friday (Aug 14) 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 5s period and expected on Sunday (Aug 09) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 9th Aug) | 1.5ft (0.5m) 14s |
| Best Surf | 12AM (Tue 11th Aug) | 4ft (1.2m) 6s |
| Most Powerful | 3PM (Fri 14th Aug) | 3.5ft (1.0m) 14s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, mates, let's be real – the next couple of weeks at Prainha are looking like a long, slow grind. Don't expect much action. The water's running about 20°, which is a little warmer than usual for this time of year, so the wait won't be too chilly, at least.
We start on Saturday, August 8th, with total trash. A tiny 2ft SE swell, but a north wind at 9 mph has it all chopped up. Not worth a second look. Sunday's a little better in size, with a 3ft swell showing up in the afternoon, but with a weak 6-second period and an onshore wind, it's just messy, crumbling waves.
The first real chance to get wet comes Monday morning, August 10th. We've got a 4ft SE swell with a nice 13-second pulse (moderate energy at 383), and light cross-offshore winds from the south. The surf will be clean. Not a barnburner, but a solid little window for a paddle.
Another little clean slot shows up on Wednesday afternoon, August 12th. The swell drops to 2ft, but the wind goes completely glassy. It'll be mirror-flat clean, but the energy is weak (122). You'll be surfing for the glide, not the power.
The one to mark on your calendar is Thursday morning, August 13th. The swell is only 2ft, but the period stretches out to 16 seconds – that's a serious groundswell. The combined energy hits a moderate 425, and the wind is dead glassy from the WNW. This is the clear standout of the run. For that size, it's packing some punch and will have real shape. Because it's such a long period, it might get a bit walled at the beach, but with those perfect conditions, this is the session.
After that, it's mostly a waiting game. There's a brief clean window on Tuesday afternoon, August 18th, with 3ft E swell and clean cross-offshore breeze. Then on the 22nd, a tiny 2ft ENE swell with offshore wind shows up, but the period is a pathetic 4 seconds – just wind slop.
If you're an advanced surfer, that Thursday morning, August 13th, is your only real standout. The rest of the 16 days is a lot of meh. Forecasts can change, but right now, it looks lean. Hang tight.
- Rusty
Short Range ForecastModerate rain (total 13mm), heaviest on Sat night. Very mild (max 18°C on Sat night, min 13°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Fri morning. Very mild (max 19°C on Thu morning, min 12°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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 14 | SE 7 | SE 5 | SE 13 | SE 13 | SSE 6 | SE 13 | SE 12 | SE 12 | SE 13 | SE 12 | SE 12 | SE 16 | SE 15 | SE 14 | SE 9 | SSE 14 | ESE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 92 | 70 | 63 | 77 | 374 | 57 | 107 | 101 | 126 | 146 | 156 | 144 | 93 | 157 | 183 | 114 | 62 | 419 | 265 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-on | cross | cross-off | cross-on | glassy | cross-off | cross | cross-on |
High Tide | 00:04AM0.91m | 1:02PM1.25m | 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 | |||||||
Low Tide | 7:22AM0.26m | 8:27PM0.42m | 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 | |||||||
 |  | |  | |  |  | | | | | |  |  |  | | | | | |
 | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — |
 | — | — | 5:51 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — |
mm | 5 | 1 | 2 | 3 | 2 | — | — | — | — | — | — | — | — | — | 1 | 2 | 2 | 2 | 4 |
Temp °C | 18 | 16 | 15 | 14 | 13 | 14 | 15 | 14 | 13 | 13 | 15 | 17 | 17 | 19 | 19 | 19 | 18 | 18 | 18 |
Feels °C | 19 | 11 | 12 | 10 | 9 | 10 | 12 | 13 | 10 | 12 | 15 | 17 | 17 | 19 | 18 | 21 | 16 | 16 | 17 |
Swell 1 Height (m) Direction Period (s) | E 5 | E 6 | E 7 | E 7 | E 7 | SE 13 | SE 5 | SE 13 | SE 12 | SE 12 | SE 13 | SE 12 | SE 12 | SE 16 | SE 15 | SE 14 | SE 9 | SE 14 | ESE 7 |
| kJ | 14 | 36 | 32 | 15 | 9 | 57 | 25 | 101 | 126 | 146 | 156 | 144 | 93 | 157 | 183 | 114 | 62 | 132 | 139 |
Swell 2 Height (m) Direction Period (s) | SE 14 | SE 14 | SE 9 | — | — | E 8 | SE 13 | SE 5 | E 8 | E 7 | E 7 | E 7 | E 5 | E 6 | E 6 | SE 4 | ENE 6 | SSE 14 | SE 13 |
| kJ | 92 | 70 | 27 | — | — | 22 | 61 | 11 | 10 | 4 | 4 | 4 | 12 | 15 | 17 | 9 | 14 | 419 | 109 |
Swell 3 Height (m) Direction Period (s) | ENE 7 | ENE 7 | SE 13 | — | — | — | E 8 | E 8 | — | — | — | — | E 8 | SE 11 | — | E 6 | SE 13 | — | SE 9 |
| kJ | 11 | 18 | 25 | — | — | — | 11 | 5 | — | — | — | — | 1 | 30 | — | 20 | 26 | — | 3 |
Wind waves Height (m) Direction Period (s) | — | SE 5 | SE 7 | SE 5 | SE 13 | SE 5 | SSE 6 | — | — | — | — | — | — | — | — | SSE 4 | — | ESE 8 | ESE 7 |
| kJ | — | 25 | 63 | 77 | 374 | 47 | 107 | — | — | — | — | — | — | — | — | 21 | — | 130 | 265 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 0 | 129 | 121 | 121 | 62 | 61 | 0 | 0 | 33 | 0 | 0 | 0 | 0 | 0 | 121 | 0 | 61 | 59 |
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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