Surf Forecasts:
Prainha surf forecast from 28 Aug 2026:
- Best quality surf: Monday 31 Aug, 9AM (local time) - 3.5ft (1.0m), 9s period, E swell with offshore winds.
- Most powerful swell: Wednesday 2 Sep, 3AM (local time) - 7.5ft (2.3m), 12s period, SSE swell with 1,633 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 6AM (local time) - 3.5ft (1.1m), 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 Friday (Aug 28) at 6AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.4m 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 2.3m 12s and forecast to arrive on Wednesday (Sep 02) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 7s period and expected on Saturday (Aug 29) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Fri 28th Aug) | 3.5ft (1.1m) 7s |
| Best Surf | 9AM (Mon 31st Aug) | 3.5ft (1.0m) 9s |
| Most Powerful | 3AM (Wed 2nd Sep) | 7.5ft (2.3m) 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 what's on the cards for the coming weeks at our local spot.
The next sixteen days are a bit of a mixed bag. We’ve got a few windows of clean surf, but you’ll have to pick your moments. There’s a good stretch of light winds early on, but the wave heights are on the smaller side, so we’re not looking at any epic, pumping sessions. The real standout is going to be Monday the 31st of August, so mark that one down.
The first worthwhile session kicks off this Friday morning, the 28th of August. Prainha is seeing a little 4ft easterly swell with a moderate period of 8 seconds, and it’s glassy as anything with that light 3 mph NNW breeze. It's small but clean, a real sneaky little morning session for the advanced crew. The combined swell energy is weak (186), so it won't be a powerhouse, but it's something. The following Saturday morning, the 29th, is almost identical: 4ft of east swell and glassy, 3 mph SE wind. It’s a similar vibe, small and clean.
Now, the morning of Monday the 31st of August is where the whole period peaks. That is the standout. We’ve got a solid 3ft easterly swell, but the period stretches to 9 seconds, a touch more push. The offshore wind from the SW at 6 mph will have it looking proper clean. The combined wave energy ramps up to a moderate 210, so there's a bit more grunt behind it. This is the one to get excited about. After that, things get a little messy and mixed.
The rest of the first week sees mainly poor conditions due to onshore or cross-shore winds, with small surf in the 2ft to 3ft range. The morning of Tuesday the 1st of September has a fleeting moment of offshore wind (SW 6 mph) with 2ft east swell, but the energy is weak (121). Not a write-off, but not a standout.
A few days later, we get another clean window on the morning of the 6th of September. It’s 3ft from the east with a short 7-second period, but the wind is light from the west (3 mph) and the ocean is glassy. The energy is moderate (141), so there's a bit of life there. It’s worth a paddle if you’re keen.
Further out, the morning of Friday the 11th of September shows some promise. A small 3ft easterly swell with a very short 5-second period, but with a clean 6 mph offshore from the WSW making it look tidy. The energy is weak (101), so expect small, clean waves that are best for a log. After that, the window looks to close with a strong cross-shore wind blowing out a slightly larger 4ft swell on the morning of the 12th.
So, to wrap it up: the best bet is Monday, 31st of August morning for the best combo of size, energy, and offshore winds. The very next morning, the 1st of September, is your secondary pick. Beyond that, it’s mostly waiting on the wind to play nice.
Rusty out.
Short Range ForecastMostly dry. Warm (max 22°C on Fri night, min 18°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Mon night. Warm (max 22°C on Tue morning, min 16°C on Tue night). Winds increasing (calm on Sun night, fresh winds from the SE by Tue afternoon). | ||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | ||||||||||||||
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 13 | E 8 | SE 12 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | ESE 9 | ESE 8 | E 9 | E 9 | SE 13 | SE 12 | SE 11 | SE 10 |
Wave Graph | |||||||||||||||||||
113 | 135 | 21 | 134 | 142 | 153 | 97 | 76 | 61 | 113 | 153 | 123 | 90 | 76 | 78 | 134 | 277 | 183 | 102 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-on | cross-on | glassy | cross-off | cross-off | cross-off | cross-on | cross | off | cross-off | cross | off | cross | cross-off | cross | cross-on | cross-on |
High Tide | 2:43AM1.39m | 3:22PM1.39m | 3:19AM1.41m | 3:55PM1.35m | 3:56AM1.39m | 4:30PM1.28m | 4:35AM1.33m | 5:07PM1.17m | 5:20AM1.23m | 5:47PM1.03m | 6:15AM1.12m | 6:36PM0.89m | |||||||
Low Tide | 8:40AM-0.03m | 8:43PM0.27m | 9:01AM-0.02m | 9:03PM0.24m | 9:26AM0.02m | 9:28PM0.22m | 9:54AM0.11m | 9:57PM0.22m | 10:24AM0.23m | 10:29PM0.25m | 10:58AM0.39m | 11:06PM0.31m | |||||||
— | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | |
— | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | — | — | 1 | 1 | 3 | 12 | — | — | — | — | — | — |
Temp °C | 20 | 20 | 21 | 22 | 21 | 20 | 19 | 20 | 19 | 19 | 21 | 21 | 20 | 22 | 19 | 18 | 16 | 18 | 18 |
Feels °C | 20 | 20 | 21 | 22 | 23 | 19 | 19 | 20 | 19 | 22 | 23 | 22 | 22 | 23 | 15 | 15 | 13 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 8 | E 8 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | ESE 9 | ESE 8 | E 9 | E 9 | SE 7 | SE 12 | SE 11 | SE 10 |
113 | 135 | 118 | 134 | 142 | 153 | 97 | 76 | 61 | 113 | 153 | 123 | 90 | 76 | 78 | 115 | 277 | 183 | 102 | |
Swell 2 Height (m) Direction Period (s) | SE 13 | SE 12 | SE 12 | SSE 11 | SE 10 | SE 10 | SE 10 | SSE 5 | SE 10 | S 10 | SSE 6 | SSE 7 | ENE 8 | SE 8 | — | E 9 | E 9 | E 9 | E 9 |
106 | 51 | 21 | 11 | 4 | 4 | 4 | 19 | 4 | 2 | 47 | 53 | 70 | 45 | — | 85 | 64 | 43 | 25 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SE 10 | — | SE 10 | SE 6 | — | ESE 8 | — | — | SE 13 | ESE 10 | SE 9 | — |
— | — | — | — | — | — | — | 4 | — | 4 | 10 | — | 54 | — | — | 134 | 10 | 14 | — | |
Wind waves Height (m) Direction Period (s) | — | — | ENE 8 | ENE 7 | — | — | SSE 6 | SSE 6 | SSE 5 | — | — | — | — | W 2 | SE 8 | — | — | — | — |
— | — | 240 | 294 | — | — | 55 | 67 | 10 | — | — | — | — | 1 | 45 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 0 | 73 | 4 | 0 | 126 | 11 | 0 | 91 | 4 | 0 | 4 | 4 | 0 | 133 | 52 | 52 | 128 | 4 |
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.











