Surf Forecasts:
Prainha surf forecast from 30 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 9AM (local time) - 5ft (1.6m), 8s period, SSE swell with cross-offshore winds.
- Most powerful swell: Wednesday 2 Sep, 12PM (local time) - 5ft (1.6m), 8s period, SE swell with 322 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 6PM (local time) - 2.5ft (0.8m), 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 Sunday (Aug 30) at 6PM. The primary swell is predicted to be 0.8m and 8s period with a secondary swell of 0.4m and 5s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.6m 8s and forecast to arrive on Wednesday (Sep 02) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 6s period and expected on Friday (Sep 04) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 30th Aug) | 2.5ft (0.8m) 8s |
| Best Surf | 9AM (Wed 2nd Sep) | 5ft (1.6m) 8s |
| Most Powerful | 12PM (Wed 2nd Sep) | 5ft (1.6m) 8s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, grab a coffee and listen up. It’s Rusty here, and I’ve been staring at the charts for your local stretch. The whole 16-day window is a bit of a mixed bag, but let’s get into it.
The water here at Prainha is sitting at 68°, which is a touch warmer than what you’d normally expect for this time of year. Not a major shift, but enough to notice when you’re paddling out.
For the first few days, it’s all pretty ordinary. Sunday the 30th and Monday the 31st have some small, clean waves coming from the east – around 3 ft to 3 ft – but the combined energy is weak (92 to 103). The wind is cross-off, so the surface is clean, but the swell is tiny and short-period at 8 seconds. It’s surfable, but you’ll be working for every little ride.
Tuesday the 1st starts off messy with a cross-shore wind, but the afternoon glass-off is a real treat. The swell bumps up a touch to 3 ft from the ESE, and the combined energy is moderate (121). Not a standout, but a nice little window for a sunset paddle.
Now, Wednesday the 2nd of September is where it gets interesting. The morning looks mint. The swell jumps to 5 ft from the SSE, with a moderate amount of energy slamming in (527). The wind is a clean cross-off from the south, keeping it all smooth. This is good for advanced surfers – the size is enough to get a decent drop, but it’s not out of control. The 8-second period means it’s a bit of a windswell, so it’ll be a bit crumbly, but the conditions are very good. This is the best on offer in the whole forecast.
The rest of the week and into the next is a tough watch. From Thursday the 3rd right through to Tuesday the 9th, the score is consistently poor. The wind is mostly onshore or cross-onshore, and the swell direction is a bit all over the place. There’s a glimmer on Friday the 4th morning with a 2 ft swell and offshore wind, but it’s tiny. The combined energy is weak (74).
We get another glassy moment on Thursday the 10th, but again, it’s just small, weak surf. The standout potential is gone.
The second week is a real struggle. Friday the 11th has a very interesting long-period swell (15 seconds) from the southeast, but it’s only 1.0 ft. The energy is barely there (83). For a point break or reef, a long period is a treat, but on a beach break like this, it’s just going to be weird and weak. The rest of the days are all poor, with onshore winds and lumpy conditions. The combined energy stays moderate at best (304 on the 14th), but the wind and chop ruins it.
Honestly, for this stretch of coast, a blank run like this isn’t unusual. The consistent spots are few and far between, and the forecasts can change. But for now, save your energy for Wednesday the 2nd of September morning. That’s your window. The rest is a waiting game.
Rusty.
Short Range ForecastHeavy rain (total 61mm), heaviest during Mon night. Warm (max 24°C on Tue afternoon, min 17°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Fri night. Very mild (max 19°C on Fri morning, min 13°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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 | ESE 8 | ESE 8 | SE 8 | SSE 8 | SE 8 | SE 10 | SE 10 | SE 11 | SE 11 | SE 10 | E 7 | E 8 | SSE 6 | SE 7 | SE 8 |
Wave Graph | |||||||||||||||||||||
78 | 63 | 86 | 89 | 66 | 66 | 102 | 116 | 173 | 318 | 115 | 137 | 151 | 134 | 92 | 52 | 68 | 60 | 132 | 199 | 238 | |
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-off | off | cross | glassy | off | cross-off | cross | cross | cross | cross-on | cross-on | off | cross | cross-off | cross | cross | cross-off |
High Tide | 4:30PM1.28m | 4:35AM1.33m | 5:07PM1.17m | 5:20AM1.23m | 5:47PM1.03m | 6:15AM1.12m | 6:36PM0.89m | 7:27AM1.00m | 2:49PM0.76m | 7:45PM0.77m | 3:40AM0.65m | 2:40PM0.82m | 9:15PM0.73m | 3:19AM0.57m | 10:43PM0.79m | ||||||
Low Tide | 9:26AM0.02m | 9:28PM0.22m | 9:54AM0.11m | 9:57PM0.22m | 10:24AM0.23m | 10:29PM0.25m | 10:58AM0.39m | 11:06PM0.31m | 11:36AM0.57m | 5:15PM0.69m | 11:50PM0.40m | 4:45AM0.64m | 12:24PM0.76m | 6:21PM0.59m | 5:52AM0.48m | 7:03PM0.50m | |||||
6:28 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | |
— | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | |
mm | 1 | 3 | 24 | 4 | 1 | 25 | 1 | 2 | — | — | — | — | — | — | — | — | — | 4 | 10 | 6 | 2 |
Temp °C | 18 | 18 | 19 | 18 | 18 | 20 | 20 | 24 | 20 | 17 | 18 | 17 | 16 | 18 | 18 | 19 | 19 | 18 | 16 | 15 | 14 |
Feels °C | 19 | 18 | 19 | 18 | 18 | 19 | 22 | 24 | 15 | 15 | 15 | 16 | 13 | 15 | 15 | 18 | 17 | 15 | 12 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | SE 7 | ESE 8 | ESE 8 | E 9 | SE 8 | SE 8 | SE 10 | SE 10 | SE 11 | ENE 5 | ENE 6 | E 7 | E 8 | E 8 | E 8 | E 8 |
78 | 63 | 86 | 89 | 66 | 54 | 102 | 116 | 93 | 126 | 115 | 137 | 151 | 134 | 25 | 39 | 68 | 60 | 43 | 32 | 21 | |
Swell 2 Height (m) Direction Period (s) | SSE 5 | SE 10 | SE 5 | SE 6 | SE 7 | E 8 | ENE 8 | ENE 8 | — | E 9 | E 9 | E 9 | E 9 | E 9 | SE 11 | SE 10 | SE 10 | SE 10 | — | — | — |
10 | 4 | 7 | 11 | 37 | 66 | 60 | 58 | — | 83 | 58 | 39 | 37 | 36 | 92 | 52 | 35 | 15 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SE 10 | — | SE 10 | — | — | E 9 | E 8 | E 8 | — | — | — | — | — | — | E 8 | E 8 | — | — | — | — | — |
4 | — | 4 | — | — | 39 | 5 | 5 | — | — | — | — | — | — | 23 | 22 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSE 5 | SE 5 | — | — | — | — | — | SSE 4 | SE 8 | SSE 8 | — | — | — | ENE 2 | NE 5 | — | — | SE 5 | SSE 6 | SE 7 | SE 8 |
27 | 7 | — | — | — | — | — | 10 | 173 | 318 | — | — | — | 1 | 82 | — | — | 22 | 132 | 199 | 238 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 33 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 218 | 4 | 4 | 213 | 4 | 0 | 235 | 61 | 80 | 133 | 33 |
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.











