
Surf Forecasts:
Prainha surf forecast from 4 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 9AM (local time) - 4ft (1.2m), 6s period, ENE swell with offshore winds.
- Most powerful swell: Sunday 6 Sep, 9PM (local time) - 6ft (1.8m), 9s period, SE swell with 515 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 3AM (local time) - 2ft (0.6m), 11s 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 Friday (Sep 04) at 3AM. The primary swell is predicted to be 0.6m and 11s 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 1.8m 9s and forecast to arrive on Sunday (Sep 06) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 8s period and expected on Wednesday (Sep 09) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 4th Sep) | 2ft (0.6m) 11s |
| Best Surf | 9AM (Tue 8th Sep) | 4ft (1.2m) 6s |
| Most Powerful | 9PM (Sun 6th Sep) | 6ft (1.8m) 9s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’ll be straight with you – the next few days are a bit of a write-off. We’ve got a long stretch of small, messy, or blown-out conditions on the cards, but there’s a couple of light at the end of the tunnel moments that are worth keeping an eye on.
Prainha is an advanced spot, very consistent, but it’s exposed to the south swell and the optimum direction is from the south. That’s the key. Everything we’ve got is coming from the east or southeast, so it’s fighting the grain a bit. The water is a touch warmer than normal for this time of year at 69°F.
We’re looking at a gap of a few days with nothing really on offer. The first real glimmer comes on the morning of Monday the 7th. A pulse of 6ft swell from the SSE, with a moderate combined energy (487), and a clean cross-offshore breeze from the SSW at 9 mph. That’s a good window. The swell period is a short 9 seconds, so it’s not a groundswell, but with the wind clean, it’ll be fun. The afternoon holds similar size (6ft) but a lighter cross-shore wind, which will still be surfable, but the morning is the pick.
Then there’s a bit of a lull again. The next standout is the morning of Tuesday the 15th. We’ve got 6ft from the SSE again, with a similar combined energy (483), and a light offshore from the SW at 6 mph. Clean conditions. The swell period is a short 8 seconds, so it’s a bit lumpy, but that offshore wind will make it rideable and fun.
The absolute best of the whole outlook, and the one I’m most excited about, is the morning of Thursday the 17th. Glassy conditions, with a north wind of just 3 mph. The swell is a clean 4ft from the east, with a short period of 6 seconds, but the combined energy is moderate (226). It’s a small day, but that glassy surface will make it silky smooth. The afternoon bumps up to 5ft from the east, but it gets a bit cross-onshore, so the morning is the clear winner.
For the rest of the fortnight, it’s mostly small, cross-shore, or onshore junk. The morning of Wednesday the 9th has a brief clean offshore window with 4ft from the east, but it’s just one slot. The morning of Tuesday the 15th is the other solid pick alongside the 17th. The 18th has a long period 16-second swell from the SE, but it’s blowing 19 mph cross-offshore, so it’s a write-off for paddle surfing – that’s more of a kite session.
So, to wrap it up: the morning of Monday the 7th is a solid, windy option, but the real standout is the glassy, clean morning of Thursday the 17th. If you can only paddle out once in the next two weeks, make it that Thursday morning.
Rusty.
Short Range ForecastHeavy rain (total 47mm), heaviest during Sat afternoon. Very mild (max 19°C on Thu night, min 14°C on Sun afternoon). Winds increasing (light winds from the WSW on Thu night, fresh winds from the SSE by Sat afternoon). | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Wed morning. Very mild (max 19°C on Wed afternoon, min 13°C on Sun night). Winds decreasing (fresh winds from the S on Sun night, light winds from the NNE by Tue night). | ||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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 11 | SE 11 | SE 11 | E 8 | E 8 | E 8 | SSE 6 | SE 6 | SE 8 | SE 10 | SE 6 | SE 6 | SE 10 | SE 12 | E 7 | SE 10 | E 8 | E 8 | E 8 |
Wave Graph | |||||||||||||||||||
126 | 58 | 56 | 88 | 66 | 66 | 103 | 80 | 167 | 398 | 82 | 40 | 92 | 101 | 124 | 36 | 198 | 135 | 113 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | off | off | cross-on | cross-off | off | cross-on | cross-on |
High Tide | 3:40AM0.65m | 2:40PM0.82m | 9:15PM0.73m | 3:19AM0.57m | 10:43PM0.79m | 12:01PM1.13m | 11:48PM0.92m | 12:52PM1.24m | 00:36AM1.07m | 1:31PM1.32m | 1:16AM1.21m | 2:05PM1.35m | 1:52AM1.32m | ||||||
Low Tide | 11:50PM0.40m | 4:45AM0.64m | 12:24PM0.76m | 6:21PM0.59m | 5:52AM0.48m | 7:03PM0.50m | 6:36AM0.32m | 7:37PM0.45m | 7:12AM0.19m | 8:04PM0.43m | 7:41AM0.09m | 8:23PM0.43m | 8:02AM0.03m | 8:27PM0.42m | |||||
— | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | 6:18 | — | — | |
6:01 | — | 6:01 | — | — | 6:02 | — | — | 6:02 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | |
mm | 1 | — | — | 4 | 4 | 24 | 14 | — | — | 3 | — | — | 1 | — | — | — | 3 | — | 3 |
Temp °C | 19 | 18 | 18 | 17 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 15 | 15 | 17 | 18 | 18 | 17 | 19 | 19 |
Feels °C | 18 | 16 | 16 | 15 | 15 | 12 | 11 | 10 | 11 | 7 | 11 | 12 | 14 | 16 | 17 | 19 | 18 | 19 | 20 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SE 11 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | SE 9 | SE 6 | SE 10 | E 5 | E 7 | SE 10 | E 8 | E 8 | E 8 |
126 | 58 | 42 | 88 | 66 | 66 | 31 | 10 | 12 | 5 | 23 | 39 | 92 | 37 | 124 | 36 | 198 | 135 | 113 | |
Swell 2 Height (m) Direction Period (s) | ENE 4 | ENE 6 | SE 11 | SE 11 | SE 5 | SE 11 | SE 11 | E 9 | — | — | E 8 | SE 11 | E 8 | SE 12 | SE 11 | — | SE 10 | SE 9 | SE 9 |
12 | 18 | 56 | 29 | 6 | 18 | 4 | 7 | — | — | 5 | 40 | 10 | 86 | 43 | — | 15 | 13 | 13 | |
Swell 3 Height (m) Direction Period (s) | E 8 | E 8 | — | — | SE 10 | SE 10 | — | — | — | — | E 8 | E 8 | SE 13 | E 8 | — | — | — | SE 14 | E 15 |
12 | 21 | — | — | 16 | 38 | — | — | — | — | 11 | 5 | 25 | 6 | — | — | — | 8 | 4 | |
Wind waves Height (m) Direction Period (s) | NE 5 | — | SE 5 | SE 5 | — | SSE 4 | SSE 6 | SE 6 | SE 8 | SE 10 | SE 6 | — | — | ENE 6 | ENE 7 | ENE 7 | — | — | — |
30 | — | 17 | 21 | — | 8 | 103 | 80 | 167 | 398 | 82 | — | — | 101 | 285 | 259 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 61 | 129 | 61 | 61 | 129 | 182 | 61 | 1671 | 129 | 28 | 128 | 0 | 0 | 80 | 4 | 0 | 73 | 4 |
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.










