Surf Forecasts:
Prainha surf forecast from 1 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 3AM (local time) - 4.5ft (1.3m), 10s period, SSE swell with offshore winds.
- Most powerful swell: Wednesday 2 Sep, 3AM (local time) - 6.5ft (2.0m), 8s period, SSE swell with 574 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 9AM (local time) - 2ft (0.6m), 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 Tuesday (Sep 01) at 9AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.6m 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 2.0m 8s and forecast to arrive on Wednesday (Sep 02) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Sunday (Sep 06) at 9AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Tue 1st Sep) | 2ft (0.6m) 8s |
| Best Surf | 3AM (Tue 8th Sep) | 4.5ft (1.3m) 10s |
| Most Powerful | 3AM (Wed 2nd Sep) | 6.5ft (2.0m) 8s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's look at the surf ahead. It’s gonna be a bit of a slow burn for Prainha, so don’t get too excited just yet.
We’re starting with a bit of a wait. The first couple of days are pretty grim, with small weak swell and messy wind. The first real chance to paddle out comes on Thursday morning, September 3rd. We’ve got a clean 3ft swell from the SE, but at 11 seconds it’s got some legs. The wind is light and cross-shore, so it’ll be a bit rippled but rideable. The energy is moderate (190), but don’t expect any barrels. It’s a pretty ordinary session overall.
It stays small and mostly blown out through the first week. There’s a glimmer on Monday morning, September 7th, with a 4ft SE swell and a longer 9-second period, and the wind is clean offshore out of the S, giving us some nice lines. The energy picks up to 216 (moderate), but it’s still only a marginal call. The water’s running at 69°F, which is a touch warmer than usual for this time of year, so you might get away with a thin wetsuit or just a spring suit.
Now, for the real standout. Don’t book your days off just yet, but keep an eye on Friday morning, September 11th. We’re looking at a solid 6ft easterly swell with a 10-second period. The combined energy jumps way up to 543, which means there’s some proper push behind it. Winds are light and cross-shore, so it should be fairly clean. This is the best on offer by a long shot, but remember it’s a week and a half out, so it’s not locked in. With that much juice, Prainha could be a proper handful for the intermediate crowd – definitely not for beginners.
After that, it drops back down. Saturday the 12th looks clean with a 4ft easterly under light offshore winds, but the energy is dropping. The last real mention is Wednesday morning, September 16th, with a tiny 3ft easterly swell and glassy conditions. It’s surfable, but it’s a session for the log or the foiler. The wind is offshore out of the W, so at least it’ll be pretty.
Overall, it’s a lean forecast with only one true highlight a long way out. The rest is small and ordinary. Keep the expectations low for the next week.
Stay salty,
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Tue afternoon. Warm (max 24°C on Tue morning, min 15°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 66mm), heaviest during Sat afternoon. Very mild (max 18°C on Fri morning, min 13°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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) | ESE 8 | SE 8 | SE 8 | SE 10 | SE 10 | SE 10 | SE 11 | SE 11 | SE 11 | SE 10 | E 8 | E 8 | E 8 | E 8 | SE 5 | E 8 | SE 6 | SE 9 | SE 9 | SE 6 | SE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 45 | 155 | 239 | 204 | 226 | 216 | 163 | 163 | 92 | 53 | 58 | 88 | 65 | 66 | 39 | 30 | 75 | 437 | 211 | 39 | 30 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | cross | cross-on | cross-on | cross-on | cross | cross-on | cross | cross-off | cross | cross-off | cross | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off |
High Tide | 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 | 12:01PM1.13m | 11:48PM0.92m | 12:52PM1.24m | 00:36AM1.07m | ||||||
Low Tide | 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 | 6:36AM0.32m | 7:37PM0.45m | 7:12AM0.19m | 8:04PM0.43m | |||||
 |  |  | |  |  | | | |  |  |  |  | |  | | | | | |  | |
 | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — |
 | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:02 | — | — | 6:02 | — |
mm | — | 3 | — | — | — | — | — | — | — | — | 2 | 9 | 15 | 29 | 5 | 1 | 2 | 3 | 2 | — | — |
Temp °C | 24 | 18 | 18 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 17 | 16 | 15 | 16 | 15 | 16 | 15 | 13 | 14 | 15 |
Feels °C | 24 | 15 | 15 | 16 | 15 | 15 | 15 | 16 | 17 | 16 | 16 | 15 | 12 | 12 | 12 | 11 | 12 | 11 | 10 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ENE 8 | ENE 8 | SE 10 | SE 10 | SE 10 | SE 11 | SE 11 | SE 11 | ENE 6 | E 8 | E 8 | E 8 | E 8 | E 8 | SE 5 | E 8 | E 8 | E 8 | SE 9 | ESE 5 |
| kJ | 39 | 58 | 12 | 204 | 226 | 216 | 163 | 163 | 92 | 26 | 58 | 88 | 65 | 66 | 32 | 21 | 22 | 12 | 5 | 22 | 17 |
Swell 2 Height (m) Direction Period (s) | E 8 | E 8 | — | E 9 | E 9 | E 9 | E 9 | E 8 | ENE 5 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | E 8 | — | — | — | E 8 | SE 11 |
| kJ | 45 | 5 | — | 58 | 40 | 25 | 23 | 13 | 19 | 53 | 52 | 28 | 15 | 14 | 4 | 30 | — | — | — | 5 | 30 |
Swell 3 Height (m) Direction Period (s) | E 8 | — | — | — | — | — | NE 3 | — | E 8 | E 8 | — | — | — | — | SE 16 | E 9 | — | — | — | SSE 11 | E 8 |
| kJ | 21 | — | — | — | — | — | 2 | — | 12 | 19 | — | — | — | — | 10 | 7 | — | — | — | 12 | 5 |
Wind waves Height (m) Direction Period (s) | — | SE 8 | SE 8 | — | — | — | NNE 3 | NE 3 | NE 5 | — | SE 4 | SE 5 | SE 5 | SSE 5 | SE 5 | SSE 6 | SE 6 | SE 9 | SE 9 | SE 6 | — |
| kJ | — | 155 | 239 | — | — | — | 4 | 3 | 38 | — | 8 | 27 | 19 | 38 | 39 | 81 | 75 | 437 | 211 | 39 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 61 | 61 | 33 | 128 | 4 | 4 | 73 | 4 | 61 | 129 | 61 | 61 | 100 | 61 | 126 | 129 | 121 | 61 | 0 | 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.
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