
Surf Forecasts:
Prainha surf forecast from 4 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 12AM (local time) - 2ft (0.6m), 7s period, E swell with glassy winds.
- Most powerful swell: Sunday 9 Aug, 3PM (local time) - 3.5ft (1.0m), 12s period, SE swell with 306 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 12AM (local time) - 2ft (0.6m), 7s 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 (Aug 05) at 12AM. The primary swell is predicted to be 0.6m and 7s period with a secondary swell of 0.3m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.0m 12s and forecast to arrive on Sunday (Aug 09) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Friday (Aug 07) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 5th Aug) | 2ft (0.6m) 7s |
| Best Surf | 12AM (Wed 5th Aug) | 2ft (0.6m) 7s |
| Most Powerful | 3PM (Sun 9th Aug) | 3.5ft (1.0m) 12s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s have a look at the stretch ahead for Prainha. It’s a bit of a slow burn, so don’t expect much in the first few days. We’ve got a long window with a lot of small, average surf, but there are a couple of windows where things might actually line up.
The water’s sitting at 67°, which is a touch warmer than normal for this time of year. Nothing crazy, but you might not need the thickest suit.
The first few days are pretty flat. Tuesday and Wednesday mornings have some tiny, weak swell—around 1ft to 2ft—but it’s mostly short-period and the energy is low (24 to 66). It’s surfable if you’re desperate, but it’s really not worth the paddle. The wind is glassy in the mornings, which is nice, but there’s just no push to the waves.
Thursday is more of the same, with a small east swell at 2ft. The period is a bit better, around 8 seconds, but the energy is still weak. Friday gets a little more wind, which messes up the surface, so it’s a pass.
The first real pulse of energy comes in on Saturday the 8th. The swell jumps to 2ft but the period stretches to 13 seconds, and the energy reads 182. It’s still small, but there’s a touch more push. The morning is glassy, so it might be worth a look if you’re really keen, but the waves will be pretty weak.
We then hit a rough patch. From Sunday the 9th through to Wednesday the 13th, the wind turns onshore or cross-shore, and it’s mostly light rain. The swell stays small and messy, with the energy dropping back down. The swell is all over the place direction-wise, and the period is mostly short. It’s not good. The 13th shows a bit more energy, but the wind is still messing it up.
Now, things start to get interesting. On Thursday the 14th, the wind finally goes light offshore from the WSW in the morning. The swell is still small, 2ft, but the period is a solid 14 seconds and the energy is climbing to 260. This is the first day that looks actually clean. It’s not big, but it might be one of the better sessions of the week.
Then, Friday the 15th shapes up as the real standout. The morning is glassy with a light NNW wind. The swell bumps up to 4ft from the east, with an 8-second period. The energy is strong at 326. This is the pick of the week. The waves should have some shape and the clean conditions will make it worth the paddle. It’s not huge, but it’s the best quality we’ve seen.
After that, Saturday the 16th sees the swell drop back a bit, and the wind turns onshore. The rest of the second week is a mix of onshore winds and small, average surf. There’s a stronger pulse of energy on the 19th, with the swell hitting 5ft and the energy reading 455, but the wind is onshore in the afternoon, which will likely chop it up. The morning on the 19th has glassy conditions, so keep an eye on that one, but it’s a long way out.
So, the one to circle is Friday the 15th. It’s not the biggest swell, but it’s the cleanest, most promising window we’ve got. The Thursday morning might be a quieter warm-up. Keep your expectations in check for the rest of it, and don’t get too excited about the long-range stuff just yet.
Rusty, out.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu night. Warm (max 25°C on Thu night, min 18°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Sat night. Warm (max 21°C on Fri morning, min 15°C on Sun morning). Winds decreasing (fresh winds from the SE on Fri afternoon, calm by Sat night). | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | |||||||||||||||
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 12 | SE 12 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | SE 12 | E 8 | E 8 | ESE 8 | SE 13 | SE 13 | SE 12 | SE 13 | SE 12 | SE 6 | SE 5 | SE 6 | SE 6 |
Wave Graph | |||||||||||||||||||||
21 | 37 | 31 | 33 | 33 | 23 | 42 | 58 | 6 | 76 | 57 | 96 | 88 | 61 | 74 | 61 | 306 | 46 | 42 | 59 | 80 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | glassy | on | glassy | glassy | glassy | cross-off | cross | cross-on | cross | glassy | glassy | glassy | cross | cross | cross | cross-off | cross-off | cross-off |
High Tide | 7:21PM0.99m | 7:46AM1.04m | 8:25PM0.89m | 9:09AM1.00m | 3:15PM0.66m | 9:42PM0.83m | 3:54AM0.57m | 10:59PM0.84m | 12:00PM1.14m | 00:04AM0.91m | 1:02PM1.25m | 00:55AM1.01m | 1:50PM1.33m | 1:38AM1.12m | |||||||
Low Tide | 11:36AM0.30m | 11:46PM0.41m | 12:22PM0.46m | 00:35AM0.47m | 1:24PM0.63m | 1:45AM0.53m | 5:51AM0.53m | 7:02PM0.49m | 6:42AM0.39m | 7:49PM0.43m | 7:22AM0.26m | 8:27PM0.42m | 7:54AM0.15m | 8:56PM0.43m | |||||||
6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | |
— | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | |
mm | — | — | — | — | — | — | — | — | 4 | 2 | — | 2 | 2 | 1 | 5 | 5 | 2 | 3 | 2 | 2 | 4 |
Temp °C | 20 | 20 | 20 | 21 | 21 | 21 | 24 | 24 | 25 | 21 | 21 | 17 | 16 | 17 | 17 | 16 | 15 | 15 | 15 | 14 | 15 |
Feels °C | 21 | 21 | 21 | 22 | 21 | 22 | 25 | 25 | 24 | 23 | 21 | 13 | 17 | 18 | 19 | 13 | 13 | 13 | 12 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | ENE 8 | E 8 | E 8 | ESE 8 | E 8 | SE 13 | E 5 | E 6 | E 6 | ENE 6 | E 9 | E 8 | ENE 8 |
24 | 23 | 31 | 33 | 33 | 23 | 42 | 58 | 63 | 76 | 57 | 96 | 80 | 61 | 25 | 24 | 31 | 13 | 39 | 34 | 22 | |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 10 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 9 | SE 13 | SE 6 | SE 12 | SE 13 | — | SE 11 | SE 11 | — | E 12 |
21 | 37 | 22 | 19 | 18 | 16 | 15 | 14 | 3 | 3 | 3 | 42 | 88 | 8 | 74 | 61 | — | 46 | 42 | — | 3 | |
Swell 3 Height (m) Direction Period (s) | S 12 | SE 10 | ESE 10 | E 11 | E 11 | E 10 | SE 15 | SE 14 | SE 12 | SE 11 | SSE 10 | — | SE 5 | — | ENE 8 | E 8 | — | E 13 | — | — | — |
3 | 27 | 9 | 2 | 2 | 2 | 9 | 7 | 6 | 5 | 10 | — | 14 | — | 20 | 10 | — | 3 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | ENE 8 | — | SSE 8 | — | E 8 | ENE 8 | — | SE 4 | SE 12 | SE 6 | SE 5 | SE 6 | SE 6 |
— | — | — | — | — | — | — | — | 138 | — | 14 | — | 127 | 92 | — | 20 | 306 | 43 | 42 | 59 | 80 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 140 | 0 | 0 | 73 | 11 | 0 | 0 | 4 | 4 | 61 | 91 | 0 | 0 | 0 | 121 | 129 | 61 | 80 | 62 | 133 |
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.











