
Surf Forecasts:
Prainha surf forecast from 14 Sep 2026:
- Best quality surf: Sunday 20 Sep, 3PM (local time) - 5ft (1.6m), 9s period, E swell with glassy winds.
- Most powerful swell: Sunday 20 Sep, 6AM (local time) - 5.5ft (1.7m), 9s period, E swell with 435 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 6PM (local time) - 2.5ft (0.8m), 9s 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 Monday (Sep 14) at 6PM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.3m and 8s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.7m 9s and forecast to arrive on Sunday (Sep 20) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 8s period and expected on Sunday (Sep 20) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 14th Sep) | 2.5ft (0.8m) 9s |
| Best Surf | 3PM (Sun 20th Sep) | 5ft (1.6m) 9s |
| Most Powerful | 6AM (Sun 20th Sep) | 5.5ft (1.7m) 9s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for Prainha over the next couple of weeks.
To be straight with you, the first half of this outlook is pretty quiet. There’s nothing worth paddling out for from now until Sunday the 14th, so you’re looking at a solid gap with no real surf on offer. The first proper glimmer of hope doesn’t show until late in the run.
That glimmer comes on Sunday the 20th. The afternoon session is the real standout here – we’ve got a clean 5ft swell pushing in from the east with a period of 9 seconds. The energy is decent, coming in at 419, and what really makes it special is the glassy wind. That’s a rare treat at Prainha. Water temp is sitting at a toasty 68°, which is a touch warmer than normal for this time of year, so you won’t be needing the thick rubber. It’s an advanced break and it’s exposed, so expect some punch. Crowds are sometimes an issue, but on a Sunday with conditions like that, you might have to share.
Before that, the pickings are slim. Tuesday morning the 15th offers tiny 2ft swell from the southeast with glassy conditions, but the energy is weak at 122. It’s surfable but very ordinary. Thursday morning the 17th is similar – 2ft, glassy, but again, nothing to get excited about. The water temp anomaly isn’t given for those days, but you can assume it stays warm.
Moving into the following week, Monday the 21st has a 4ft east swell with a light cross-shore, but it’s only marginal. Tuesday the 22nd is back to tiny 3ft with glassy conditions in the morning – surfable, but flat by any standard. From Wednesday the 23rd onward, it’s mostly poor conditions and dropping swell. By the time we hit the last week of September, we’re looking at 1ft to 2ft – barely a ripple. The energy drops right off, down to 23 on the 26th.
There is a late pulse showing on Tuesday the 29th afternoon: 3ft from the southeast with a period of 11 seconds and energy of 267. It’s cross-shore wind though and the comment says marginal, so it’s not a guarantee. Keep an eye on it, but don’t hold your breath.
So, to wrap it up: Sunday the 20th afternoon is your best bet by a long shot. Glassy, chest-high east swell, and the water’s warm. After that, it’s mostly small and messy. If you’re not keen on waiting, the forecast might change – it’s still early days for that second week.
Stay stoked,
Rusty
Short Range ForecastModerate rain (total 10mm), heaviest on Mon morning. Very mild (max 17°C on Tue morning, min 13°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 65mm), heaviest during Sat night. Warm (max 20°C on Sat night, min 16°C on Thu morning). Winds increasing (calm on Thu morning, fresh winds from the NE by Sat night). | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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) | SSE 6 | SE 6 | SE 8 | SE 9 | SE 9 | SE 12 | SE 5 | SE 8 | SE 9 | SE 10 | SE 12 | SE 13 | E 6 | E 7 | E 7 | E 7 | E 8 | E 8 | E 9 | E 9 | E 9 |
Wave Graph | |||||||||||||||||||||
188 | 47 | 44 | 51 | 46 | 55 | 35 | 74 | 83 | 59 | 37 | 60 | 76 | 126 | 176 | 156 | 221 | 351 | 404 | 417 | 311 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | glassy | on | cross-off | cross | cross-on | cross-on | glassy | on | on | on | on | on | on | on | cross-on | cross-on | glassy | cross-off |
High Tide | 4:24PM1.12m | 4:47AM1.20m | 4:46PM1.03m | 5:29AM1.08m | 5:05PM0.94m | 6:25AM0.96m | 3:17PM0.86m | 7:47AM0.87m | 2:57PM0.84m | 7:29PM0.75m | 3:37AM0.60m | 2:39PM0.82m | 9:26PM0.76m | 11:01AM0.96m | 10:50PM0.87m | ||||||
Low Tide | 9:27AM0.19m | 9:31PM0.14m | 9:52AM0.29m | 10:01PM0.16m | 10:20AM0.40m | 10:35PM0.22m | 10:50AM0.52m | 11:13PM0.32m | 11:26AM0.65m | 6:08PM0.74m | 4:56AM0.59m | 12:22PM0.78m | 6:24PM0.64m | 5:48AM0.45m | 6:44PM0.55m | ||||||
6:13 | — | — | 6:11 | — | — | 6:09 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:05 | — | — | |
— | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | |
mm | 3 | 3 | 1 | — | — | 2 | 1 | — | — | — | — | 6 | 3 | 1 | 5 | 13 | 8 | 29 | 2 | 1 | — |
Temp °C | 14 | 13 | 14 | 17 | 17 | 17 | 17 | 17 | 16 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 22 |
Feels °C | 11 | 11 | 12 | 16 | 16 | 16 | 16 | 14 | 13 | 17 | 16 | 16 | 18 | 18 | 17 | 17 | 18 | 20 | 22 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | SE 6 | SE 6 | SE 8 | SE 9 | SE 9 | E 8 | E 7 | SE 8 | SE 9 | SE 10 | ESE 5 | E 5 | E 6 | SE 10 | SE 10 | E 7 | SSE 9 | E 8 | E 9 | E 9 | E 9 |
47 | 47 | 44 | 51 | 46 | 28 | 26 | 58 | 83 | 59 | 9 | 31 | 76 | 25 | 14 | 156 | 8 | 351 | 404 | 417 | 311 | |
Swell 2 Height (m) Direction Period (s) | E 9 | E 8 | E 9 | E 8 | E 8 | SE 13 | SE 12 | E 7 | E 7 | ESE 8 | ESE 7 | SE 13 | SE 11 | E 10 | — | SE 9 | SE 12 | SE 8 | — | S 11 | S 12 |
14 | 13 | 13 | 21 | 30 | 7 | 22 | 40 | 28 | 19 | 18 | 60 | 30 | 8 | — | 13 | 6 | 3 | — | 2 | 3 | |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 11 | ESE 10 | E 8 | — | SE 12 | SE 8 | E 13 | SE 13 | SE 12 | SE 12 | E 11 | ESE 10 | — | — | — | S 11 | S 11 | — | — | — |
6 | 5 | 11 | 50 | — | 39 | 10 | 3 | 7 | 23 | 37 | 9 | 10 | — | — | — | 2 | 2 | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSE 6 | — | — | — | — | SE 8 | SE 5 | SE 8 | — | — | ENE 4 | E 5 | ENE 6 | E 7 | E 7 | ENE 8 | E 8 | ENE 8 | ENE 9 | — | — |
188 | — | — | — | — | 55 | 35 | 74 | — | — | 4 | 53 | 170 | 126 | 176 | 336 | 221 | 702 | 878 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 33 | 11 | 0 | 0 | 73 | 0 | 61 | 235 | 91 | 0 | 73 | 73 | 128 | 128 | 213 | 213 | 213 | 40 | 4 | 0 | 0 |
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.










