Surf Forecasts:
Rosa surf forecast from 9 Aug 2026:
- Best quality surf: Sunday 9 Aug, 9PM (local time) - 7ft (2.1m), 11s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 3PM (local time) - 8ft (2.4m), 12s period, S swell with 1,735 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 9PM (local time) - 7ft (2.1m), 11s period with S swell.
Best Forecast Surf Conditions for Rosa this week:
The surf forecast for Rosa over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 09) at 9PM. The primary swell is predicted to be 2.1m and 11s period with a secondary swell of 0.6m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Rosa in the next 16 days are 2.4m 12s and forecast to arrive on Monday (Aug 10) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 9th Aug) | 7ft (2.1m) 11s |
| Best Surf | 9PM (Sun 9th Aug) | 7ft (2.1m) 11s |
| Most Powerful | 3PM (Mon 10th Aug) | 8ft (2.4m) 12s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright, Rusty here, checkin' in from Rosa. Let's see what this place has cookin' over the next couple of weeks. It's a slow start, but there's a couple of windows that'll get your blood pumpin'.
The first real action isn't until Tuesday the 11th. We've got a bit of a wait through Sunday and Monday, where conditions are just too marginal to get excited about. The combined energy of all swells directed here during that early stuff was only gettin' up to 974, weak stuff with choppy westerly winds. Best to sit that one out.
The standout of the whole run, without a doubt, is Tuesday the 11th. Glassy. Both morning and afternoon are forecast to be glassy. This is a massive positive. The wind goes from a slight air out of the SW to NNE and it's dead calm. The swell is a solid 7 to 7 ft of south groundswell, with a period of 12 seconds – that's proper energy pourin' in (energy sittin' between 1167 and 1367). It's right in that sweet spot for an intermediate surfer. Not too big for a go, but plenty of push. With that glassy surface, Rosa will be clean as a whistle. Crowds are possible here though, so get in early.
Thursday the 13th morning also looks mint. Glassy again from the NNE, with a 6 ft SSE swell, and a longer 14-second period (energy at 1525). That longer period will clean things up even more, with some bigger sets rolling through. It's a groundswell, so the gaps between sets will be longer, but the shape will be there.
Heading into the second week, things get a bit more mixed, but Friday the 14th offers another good chance. Clean cross-off winds from the SW and a 5 to 6 ft south swell, period of 13 seconds. Energy is strong at 1716. That's another day with solid, clean waves for experienced surfers.
Later on, there's a tease on the 24th of August, a Monday. Glassy, with a 6 ft south swell, but the period drops right off to 7 seconds. That’s a short-period wind swell, so it'll be a bit fat and crumbly, not the same quality as the earlier groundswell.
Overall, don't waste your time before the 11th. Focus on Tuesday the 11th and Thursday the 13th for the best of the best. The water's about normal for the time of year.
Stay stoked.
Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Sun night. Very mild (max 15°C on Mon afternoon, min 11°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 25mm), heaviest during Wed morning. Very mild (max 19°C on Thu morning, min 12°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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) | S 8 | S 11 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | SSE 12 | SSE 12 | S 12 | SSE 14 | S 13 | SSE 13 | S 13 | SSE 13 | ESE 9 | ESE 9 | ESE 9 | ESE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 569 | 1271 | 1154 | 1129 | 1735 | 1530 | 1342 | 1155 | 1334 | 1064 | 928 | 711 | 1491 | 1440 | 1401 | 905 | 1288 | 742 | 566 | 442 | 432 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross | cross-off | glassy | glassy | cross | cross | cross | cross | glassy | on | glassy | cross-off | cross-off | cross-on | glassy | glassy | cross |
High Tide | 2:00PM0.75m | 1:17AM0.39m | 2:42PM0.76m | 00:31AM0.44m | 3:20PM0.73m | 00:37AM0.52m | 3:50PM0.67m | 1:04AM0.60m | 3:20PM0.59m | 1:37AM0.66m | 2:58PM0.55m | 2:13AM0.70m | 3:07PM0.54m | 2:51AM0.70m | |||||||
Low Tide | 7:43PM0.29m | 6:49AM0.01m | 8:11PM0.30m | 7:35AM-0.05m | 8:37PM0.33m | 8:17AM-0.09m | 9:02PM0.35m | 8:57AM-0.08m | 9:26PM0.35m | 9:35AM-0.04m | 9:48PM0.34m | 10:10AM0.04m | 10:06PM0.32m | ||||||||
 | |  | | |  |  |  |  |  |  | | | | | | | | | |  | |
 | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — |
 | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | — | 5:52 | — |
mm | — | — | 1 | — | — | — | — | 1 | — | 9 | 3 | — | — | 2 | 3 | 1 | 2 | 5 | 1 | 1 | 1 |
Temp °C | 14 | 13 | 12 | 14 | 15 | 13 | 14 | 13 | 12 | 13 | 15 | 15 | 19 | 17 | 18 | 18 | 18 | 18 | 19 | 19 | 19 |
Feels °C | 10 | 9 | 10 | 10 | 11 | 11 | 13 | 12 | 11 | 11 | 14 | 14 | 20 | 18 | 19 | 19 | 19 | 20 | 21 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 11 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | SSE 12 | SSE 12 | S 12 | SSE 14 | S 13 | SSE 13 | SE 8 | SSE 13 | ESE 9 | ESE 9 | ESE 9 | ESE 8 |
| kJ | 353 | 992 | 1154 | 1129 | 1351 | 1530 | 1342 | 1155 | 1334 | 1064 | 928 | 711 | 1491 | 1440 | 1401 | 353 | 1288 | 742 | 566 | 442 | 432 |
Swell 2 Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | E 8 | NE 5 | ENE 6 | ENE 6 | S 13 | ESE 8 | S 12 | SSE 12 | SSE 11 | S 11 |
| kJ | 48 | 31 | 50 | 22 | 40 | 39 | 25 | 12 | 11 | 5 | 5 | 1 | 34 | 21 | 25 | 905 | 355 | 672 | 470 | 363 | 229 |
Swell 3 Height (m) Direction Period (s) | E 15 | — | E 13 | — | — | — | — | — | — | — | — | — | NW 4 | — | NE 6 | NE 6 | — | NE 6 | — | — | — |
| kJ | 4 | — | 3 | — | — | — | — | — | — | — | — | — | 3 | — | 23 | 19 | — | 6 | — | — | — |
Wind waves Height (m) Direction Period (s) | S 8 | S 11 | — | SSW 9 | S 12 | — | — | — | — | NE 7 | NE 4 | NE 5 | — | — | — | ESE 8 | NE 6 | — | — | NNE 3 | — |
| kJ | 569 | 1271 | — | 528 | 1735 | — | — | — | — | 8 | 16 | 37 | — | — | — | 439 | 10 | — | — | 6 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 24 | 0 | 2 | 24 | 0 | 0 | 0 | 4 | 4 | 4 | 4 | 0 | 12 | 0 | 0 | 0 | 2 | 0 | 0 | 2 |
Best forecast wave conditions in Santa Catarina - Sul | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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Information about the Rosa Surf forecast
The above surf forecast table for Rosa provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rosa can be found by selecting the local surf guide option on the grey menu. Our Rosa 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 (Rosa) 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 Rosa 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.
Rosa is 12 km (7 miles) from Imbituba. If you plan a holiday in Santa Catarina - Sul, look for hotels and other accommodation in Imbituba. Imbituba has rooms for a wide range of budgets as well as car hire and transport links.
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