Surf Forecasts:
Prainha surf forecast from 8 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 3AM (local time) - 5ft (1.5m), 9s period, E swell with offshore winds.
- Most powerful swell: Tuesday 15 Sep, 6AM (local time) - 5ft (1.5m), 9s period, E swell with 363 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 9AM (local time) - 2ft (0.6m), 10s 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 Tuesday (Sep 08) at 9AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.3m and 12s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.5m 9s and forecast to arrive on Tuesday (Sep 15) at 6AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Friday (Sep 11) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Tue 8th Sep) | 2ft (0.6m) 10s |
| Best Surf | 3AM (Tue 15th Sep) | 5ft (1.5m) 9s |
| Most Powerful | 6AM (Tue 15th Sep) | 5ft (1.5m) 9s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Right, grab your wettie, let’s have a look at what Prainha’s got cookin’. It’s gonna be a bit of a wait for the good stuff, but there’s a solid window coming up if you’re patient.
For the first week, from the 8th through to the 14th, it’s pretty flat and messy. The wind is all over the place, mostly onshore or cross-shore, and the swell is small and weak. You’ll get a few knee-high waves here and there, but honestly, it’s not worth paddling out for. We’ve got a long gap with no real recommendations until we hit the 15th.
Now, the standout period kicks off on Tuesday the 15th. The morning is looking promising with a 5ft easterly swell, a clean 9-second period, and light offshore winds from the WSW. The energy is building to 391 (moderate energy). That’s the best-looking surf in the whole run. It’s clean, it’s got push, and Prainha (an exposed break, so it’ll pick up that easterly swell nicely) will be offering up some decent, lined-up waves for advanced guys. The water is sitting at about 68°, which is a touch warmer than normal for this time of year, so you can get away with a thinner suit. Just be aware that crowds are possible here.
Wednesday the 16th morning is another shout. The swell jumps to 6ft from the SE, with a moderate 8-second period, and wind is cross-off from the S. The energy is ramping up to 696 (moderate to strong energy). This is solid, punchy stuff, but at 6ft it’s getting a bit heavy for beginners. It’ll be a good session for more experienced surfers looking for some power.
After that, into the second week, things get less certain. The 19th and 20th show some clean mornings with 4 to 5ft easterly swell and light cross-off winds, but the consistency drops off. They’re worth a look if you’re hanging around, but not the absolute standouts that Tuesday and Wednesday are.
So, bottom line: the surf is poor for the first week, but if you mark your calendar for Tuesday 15th and Wednesday 16th, you’ve got two good mornings lined up. Anything beyond that is a bit of a gamble.
Rusty.
Short Range ForecastHeavy rain (total 25mm), heaviest during Wed night. Warm (max 20°C on Thu morning, min 14°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 71mm), heaviest during Sun night. Warm (max 23°C on Fri night, min 15°C on Sat night). Winds increasing (light winds from the WSW on Fri night, fresh winds from the E by Sun night). | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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) | SE 10 | ESE 6 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ESE 13 | E 13 | SE 7 | SE 9 | SE 6 | SE 9 | SE 6 | ESE 7 | E 7 | SE 9 | ESE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 77 | 39 | 77 | 94 | 129 | 104 | 78 | 57 | 57 | 42 | 17 | 5 | 223 | 226 | 112 | 220 | 111 | 180 | 161 | 103 | 307 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | on | cross-off | glassy | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-on | cross-off | cross | cross | cross | cross | cross-on | cross-on | on | on | cross-off |
High Tide | 1:31PM1.32m | 1:16AM1.21m | 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 | ||||||||
Low Tide | 8:23PM0.43m | 8:02AM0.03m | 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 | ||||||||
 | |  | | |  |  |  |  |  | |  | |  |  | |  | | | |  | |
 | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — |
 | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — |
mm | — | — | — | — | — | 15 | 6 | 3 | 1 | 4 | — | 5 | — | — | 6 | 6 | 12 | 38 | 5 | 5 | 11 |
Temp °C | 17 | 17 | 17 | 17 | 18 | 19 | 20 | 20 | 20 | 20 | 22 | 23 | 17 | 17 | 16 | 17 | 17 | 16 | 17 | 17 | 17 |
Feels °C | 17 | 16 | 18 | 18 | 18 | 20 | 21 | 20 | 21 | 21 | 23 | 25 | 11 | 11 | 12 | 15 | 14 | 11 | 11 | 12 | 17 |
Swell 1 Height (m) Direction Period (s) | SE 10 | ESE 6 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | SE 12 | ENE 6 | E 7 | E 8 | E 8 | SE 6 | E 8 | SE 9 | E 7 | E 7 | ESE 9 |
| kJ | 77 | 39 | 77 | 94 | 129 | 104 | 78 | 57 | 57 | 42 | 6 | 85 | 53 | 46 | 33 | 46 | 33 | 31 | 107 | 77 | 307 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 10 | SE 10 | SE 10 | SE 12 | SE 12 | SE 13 | SE 16 | SE 14 | SSE 12 | E 13 | E 13 | E 12 | — | — | SE 9 | — | — | SE 9 | SE 9 | ENE 8 |
| kJ | 24 | 24 | 35 | 25 | 35 | 37 | 25 | 40 | 30 | 15 | 3 | 3 | 3 | — | — | 55 | — | — | 23 | 103 | 238 |
Swell 3 Height (m) Direction Period (s) | E 8 | SE 12 | ESE 12 | — | SE 12 | S 9 | SE 17 | E 14 | E 14 | ESE 13 | ESE 13 | SE 11 | — | — | — | E 8 | — | — | SE 11 | — | S 9 |
| kJ | 5 | 24 | 15 | — | 40 | 42 | 12 | 4 | 4 | 17 | 17 | 5 | — | — | — | 32 | — | — | 20 | — | 61 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | NNW 3 | N 3 | ENE 8 | — | SE 7 | SE 9 | SE 6 | SE 9 | SE 6 | ESE 7 | E 7 | — | — |
| kJ | — | — | — | — | — | — | — | — | 6 | 1 | 85 | — | 223 | 226 | 112 | 220 | 111 | 180 | 161 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 128 | 0 | 0 | 4 | 33 | 4 | 0 | 0 | 0 | 73 | 4 | 133 | 133 | 62 | 129 | 121 | 236 | 380 | 213 | 28 |
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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