
Surf Forecasts:
Prainha surf forecast from 9 Sep 2026:
- Best quality surf: Monday 14 Sep, 9PM (local time) - 5.5ft (1.7m), 9s period, ESE swell with offshore winds.
- Most powerful swell: Sunday 13 Sep, 3PM (local time) - 6ft (1.8m), 10s period, SE swell with 609 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 12PM (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 Wednesday (Sep 09) at 12PM. The primary swell is predicted to be 0.8m and 8s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.8m 10s and forecast to arrive on Sunday (Sep 13) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Friday (Sep 11) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Wed 9th Sep) | 2.5ft (0.8m) 8s |
| Best Surf | 9PM (Mon 14th Sep) | 5.5ft (1.7m) 9s |
| Most Powerful | 3PM (Sun 13th Sep) | 6ft (1.8m) 10s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, folks, it’s Rusty here, and I’ve been staring at the charts for our area. Gotta be straight with you – it’s a bit of a waiting game this time around. We’ve got one break on the radar, Prainha, and it’s a moody one that’s gonna take some patience.
The first week is mostly a right-off for any decent session. We’re seeing small, weak surf with crappy wind, but there are a few windows that’ll get a local charger out of bed.
Wednesday morning kicks things off with a tiny 3ft wave from the east, period of 7 seconds. The energy is weak (105), nothing to write home about. But, the wind is dead calm and glassy. It’s surfable, but very ordinary. Might be worth a splash for the soul, but don't expect much.
The next few days are pretty grim. Thursday and Friday bring *light rain* and messy cross-shore winds, with the swell stuck between 2ft and 3ft. The energy stays weak, under 100.
Saturday the 12th is a real tease. The swell bumps up to 5ft from the SSE with a short 8-second period, and the energy jumps to moderate (314). However, a fresh 19 mph cross-shore wind will make it lumpy and choppy – looks more like a windsurfing day than a clean surf session. The wind and chop ruin it.
We get a bit of a pulse through Sunday and Monday, with the swell reaching 6ft from the SE on Sunday afternoon. But again, it’s plagued by cross-onshore wind and lumpy conditions. It’s just not coming together.
Now, here’s where it starts to get interesting for the patient ones.
Monday the 14th afternoon is the first real standout. The wind swings to a light cross-offshore, cleaning up a 4ft wave from the SSE with a 9-second period. The energy is solid (440). This is what we’ve been waiting for. Prainha will be clean, and the quality will be there. It's an advanced-level wave, and crowds can be *sometimes* a factor, so get in early if you can.
Tuesday the 15th is also looking good. The morning has clean, gentle offshore wind from the west, and a 4ft wave from the east. Not huge, but clean. The afternoon gets even better with light cross-offshore wind and a 4ft wave from the ESE, with a beefy energy reading (444). Expect good surf conditions.
Then the window closes again for a few days with more wind and chop, until Thursday the 17th morning brings back a gentle offshore from the WSW. A 4ft, 9-second SE swell cleans up nicely, offering another session of good quality.
But the real prize, the one to circle on the calendar, is Friday the 18th morning. The swell jumps up to a solid 7ft from the east, with a 7-second period. Combined energy is a powerful 612. The wind is light and cross-offshore. This is the biggest, cleanest wave of the entire 16-day run. It’s going to be powerful and pushy at 7ft, so this one is strictly for the advanced crew. Beginners, sit this one out.
After that, things fade back to small, mostly average conditions through to the 24th.
The water temperature is sitting at 68°, which is about normal for this time of year, so no wetsuit drama.
So, bottom line: this isn't a week for a casual paddle. Wait for the window on Monday the 14th afternoon, or the absolute standout on Friday the 18th morning. Everything else is a gamble with the wind.
Stay salty.
Rusty.
Short Range ForecastHeavy rain (total 72mm), heaviest during Thu morning. Warm (max 21°C on Fri afternoon, min 16°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 61mm), heaviest during Sun night. Very mild (max 17°C on Sat morning, min 16°C on Sun night). Winds decreasing (fresh winds from the SSE on Sat morning, light winds from the SSW by Mon afternoon). | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | N 5 | SSE 8 | SE 9 | SE 6 | SE 10 | SE 10 | SE 10 | E 7 | SSE 9 | E 9 | E 8 | E 8 | SE 7 |
Wave Graph | |||||||||||||||||||||
70 | 72 | 76 | 72 | 55 | 54 | 60 | 44 | 28 | 257 | 193 | 62 | 266 | 609 | 130 | 181 | 207 | 412 | 165 | 184 | 162 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | glassy | cross | cross | cross-off | cross-on | cross | cross | cross | cross | cross-on | cross-on | on | on | cross-off | off | off | cross-off | cross |
High Tide | 2:05PM1.35m | 1:52AM1.32m | 2:37PM1.35m | 2:28AM1.38m | 3:06PM1.32m | 3:02AM1.40m | 3:34PM1.27m | 3:36AM1.37m | 4:00PM1.20m | 4:11AM1.30m | 4:24PM1.12m | 4:47AM1.20m | 4:46PM1.03m | ||||||||
Low Tide | 8:27PM0.42m | 8:16AM0.00m | 8:16PM0.38m | 8:27AM0.01m | 8:19PM0.30m | 8:43AM0.05m | 8:38PM0.22m | 9:03AM0.11m | 9:02PM0.16m | 9:27AM0.19m | 9:31PM0.14m | 9:52AM0.29m | 10:01PM0.16m | ||||||||
6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | 6:11 | — | — | |
— | 6:04 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | |
mm | 1 | — | 23 | 27 | 8 | 4 | 4 | 1 | 4 | 1 | 2 | 10 | 9 | 3 | 22 | 8 | 6 | — | — | — | — |
Temp °C | 17 | 18 | 18 | 18 | 19 | 19 | 20 | 21 | 21 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 23 | 24 | 17 |
Feels °C | 18 | 19 | 19 | 20 | 17 | 18 | 19 | 20 | 24 | 12 | 13 | 13 | 14 | 14 | 14 | 13 | 17 | 15 | 20 | 21 | 14 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 7 | E 7 | E 8 | E 8 | E 8 | SE 10 | SE 10 | E 7 | E 7 | E 9 | E 8 | E 8 | E 8 |
70 | 72 | 76 | 72 | 55 | 54 | 60 | 44 | 93 | 54 | 46 | 32 | 32 | 255 | 130 | 85 | 146 | 412 | 165 | 169 | 89 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 12 | SE 12 | SE 13 | SE 16 | SE 14 | SSE 12 | SE 12 | E 12 | E 12 | — | SE 10 | — | E 8 | E 6 | SE 9 | SE 9 | SSE 9 | SE 9 | SSE 11 | — |
35 | 48 | 36 | 25 | 40 | 30 | 15 | 6 | 3 | 3 | — | 46 | — | 33 | 45 | 70 | 64 | 75 | 27 | 91 | — | |
Swell 3 Height (m) Direction Period (s) | — | SE 13 | E 14 | SE 18 | SE 12 | E 14 | E 13 | E 13 | SE 11 | — | — | SE 12 | — | — | E 8 | — | SSE 11 | — | SE 11 | — | — |
— | 45 | 4 | 12 | 5 | 4 | 3 | 3 | 5 | — | — | 36 | — | — | 11 | — | 23 | — | 5 | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NE 4 | ENE 5 | N 5 | SSE 8 | SE 9 | SE 6 | SE 10 | SE 10 | — | E 7 | SSE 9 | SW 3 | — | ESE 8 | SE 7 |
— | — | — | — | — | — | 16 | 37 | 28 | 257 | 193 | 62 | 266 | 609 | — | 181 | 207 | 2 | — | 184 | 162 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 28 | 0 | 0 | 4 | 11 | 0 | 260 | 4 | 129 | 133 | 121 | 121 | 128 | 391 | 332 | 0 | 0 | 0 | 0 | 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.










