Surf Forecasts:
Rosa surf forecast from 5 Aug 2026:
- Best quality surf: Friday 7 Aug, 9PM (local time) - 10ft (3.0m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Saturday 8 Aug, 12AM (local time) - 8ft (2.5m), 12s period, S swell with 1,993 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 6AM (local time) - 3ft (0.9m), 11s period with SSE 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 Wednesday (Aug 05) at 6AM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 0.7m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rosa in the next 16 days are 2.5m 12s and forecast to arrive on Saturday (Aug 08) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Saturday (Aug 08) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Wed 5th Aug) | 3ft (0.9m) 11s |
| Best Surf | 9PM (Fri 7th Aug) | 10ft (3.0m) 10s |
| Most Powerful | 12AM (Sat 8th Aug) | 8ft (2.5m) 12s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get stuck into what’s coming up for Rosa over the next couple of weeks.
We’ve got a bit of a slow start, with a few days of very ordinary, small surf before things start to build. The first real action worth paddling out for kicks off on Saturday the 8th of August. There’s a solid pulse of south swell pushing in, with waves around 7 ft and a period of 12 seconds, which is a proper groundswell. The combined energy is moderate to strong (1193), but the wind is a cross-shore breeze, so it’s going to be a bit lumpy. The south swell direction is a good match for this spot. It’s a fairly consistent break, so there will be waves, but the conditions aren’t perfect.
The standout window really opens up on Sunday the 9th of August. The swell jumps to 7 ft from the south, with a period of 11 seconds, still decent energy. The wind shifts to a cross-offshore breeze, cleaning the faces up nicely. The combined energy is strong (2233), but this is borderline for intermediates – at 7 ft, it’s getting into the territory where you want to be comfortable in bigger surf. For the experienced crew, this is a proper session.
If you’re looking for the absolute best on offer, you have to circle Wednesday the 12th of August – morning session. The swell drops a touch to 5 ft from the SSE, but the period stretches to 12 seconds, and the wind goes glassy. That’s a magic combination. The combined energy (1002) is solid, and the glassy conditions will make Rosa look like a mirror. It’s a top pick for experienced surfers looking for clean, powerful waves.
Then, hold onto your board, because Tuesday the 18th of August – morning – is the big one. Swell hits 8 ft from the south with a 9-second period. The wind is glassy. The combined energy is a massive 1229. This is expert-only territory. The waves will be powerful and closing out, but for the blokes who know what they’re doing, it’s a bomb. The south swell is right in the slot for the break.
The water temperature is about average for this time of year, nothing weird to report.
Overall, don’t waste your time on the first few days. The real surf kicks in from the 8th, with a serious peak on the 12th and that monster on the 18th. Get out there.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Wed afternoon. Warm (max 24°C on Thu morning, min 13°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Mon morning. Very mild (max 19°C on Sat afternoon, min 11°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
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) | SSE 10 | SSE 10 | SSE 9 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | S 7 | S 12 | S 12 | S 12 | S 12 | SSE 11 | S 11 | S 11 | S 12 | S 13 | S 11 | S 10 | S 10 | SSE 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 136 | 102 | 68 | 64 | 91 | 101 | 109 | 315 | 1993 | 1227 | 1179 | 1031 | 540 | 764 | 736 | 383 | 943 | 1024 | 512 | 569 | 399 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross | cross-off | glassy | cross-off | cross-off | cross | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:20AM0.39m | 5:47PM0.43m | 11:32PM0.35m | 6:39AM0.48m | 6:19PM0.37m | 12:31PM0.61m | 6:54PM0.32m | 1:17PM0.70m | 1:12AM0.38m | 2:00PM0.75m | 1:17AM0.39m | 2:42PM0.76m | 00:31AM0.44m | 3:20PM0.73m | 00:37AM0.52m | ||||||
Low Tide | 9:47AM0.39m | 2:10PM0.28m | 9:13PM0.32m | 8:58AM0.45m | 3:48PM0.32m | 9:24PM0.30m | 3:42AM0.24m | 5:46PM0.32m | 9:34PM0.29m | 4:54AM0.17m | 7:11PM0.29m | 5:56AM0.09m | 7:43PM0.29m | 6:49AM0.01m | 8:11PM0.30m | 7:35AM-0.05m | 8:37PM0.33m | ||||
 |  |  |  |  |  | | |  |  | |  | | |  | | | | | | | |
 | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — |
 | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — |
mm | — | 4 | — | — | — | 1 | — | — | — | 1 | 2 | — | 1 | 2 | 1 | 3 | 2 | 2 | — | — | — |
Temp °C | 21 | 20 | 18 | 24 | 23 | 23 | 20 | 18 | 13 | 16 | 19 | 18 | 15 | 13 | 12 | 11 | 11 | 12 | 12 | 12 | 13 |
Feels °C | 22 | 22 | 20 | 25 | 24 | 22 | 18 | 14 | 10 | 12 | 16 | 19 | 13 | 11 | 10 | 9 | 8 | 9 | 9 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | SSE 10 | SSE 10 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 12 | S 12 | S 12 | S 12 | SSE 11 | ENE 8 | S 11 | S 10 | S 13 | S 11 | S 10 | S 10 | SSE 12 |
| kJ | 136 | 102 | 47 | 59 | 91 | 101 | 109 | 93 | 1993 | 1227 | 1179 | 1031 | 540 | 23 | 736 | 327 | 943 | 724 | 512 | 569 | 399 |
Swell 2 Height (m) Direction Period (s) | ENE 7 | ENE 7 | SSE 9 | SSE 9 | SSE 9 | SE 9 | N 4 | — | ENE 8 | — | — | NE 8 | ENE 8 | — | ENE 8 | S 12 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | S 10 |
| kJ | 45 | 48 | 68 | 64 | 44 | 19 | 9 | — | 55 | — | — | 129 | 40 | — | 23 | 383 | 43 | 61 | 26 | 24 | 196 |
Swell 3 Height (m) Direction Period (s) | ESE 11 | E 11 | S 11 | SSE 13 | SSE 12 | SSE 11 | WNW 3 | — | — | — | — | — | E 15 | — | — | ENE 8 | — | E 12 | SSE 11 | SSE 11 | NE 8 |
| kJ | 11 | 2 | 9 | 18 | 30 | 24 | 1 | — | — | — | — | — | 4 | — | — | 22 | — | 3 | 12 | 40 | 15 |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 4 | — | N 4 | S 10 | S 7 | — | ENE 8 | NE 5 | SW 3 | S 7 | S 11 | — | — | — | S 11 | — | — | — |
| kJ | — | — | — | 9 | — | 28 | 68 | 315 | — | 86 | 75 | 12 | 311 | 764 | — | — | — | 1024 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 3 | 0 | 6 | 0 | 24 | 547 | 0 | 41 | 25 | 24 | 7 | 7 | 0 | 0 | 0 | 0 | 0 | 0 |
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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