Surf Forecasts:
Rosa surf forecast from 26 Aug 2026:
- Best quality surf: Monday 31 Aug, 6AM (local time) - 4.5ft (1.4m), 9s period, ENE swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 9PM (local time) - 7ft (2.2m), 15s period, SSE swell with 2,038 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 6AM (local time) - 6ft (1.8m), 8s period with ENE 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 Saturday (Aug 29) at 6AM. The primary swell is predicted to be 1.8m and 8s period with a secondary swell of 0.4m and 10s. 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 2.2m 15s and forecast to arrive on Wednesday (Aug 26) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Aug 29) at 3PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sat 29th Aug) | 6ft (1.8m) 8s |
| Best Surf | 6AM (Mon 31st Aug) | 4.5ft (1.4m) 9s |
| Most Powerful | 9PM (Wed 26th Aug) | 7ft (2.2m) 15s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
IMPERIAL UNITS
Alright crew, Rusty here, looking at the next couple of weeks for Rosa. I gotta be honest, the first few days are a bit of a dud, so we’ve got a long gap before anything looks rideable.
The start is a mess. Wednesday the 26th has some proper size, 8ft from the SSE, but the wind is a nasty cross-on from the NE at 16 mph, and the energy is strong (2186). It’s just a choppy, poor mess. Thursday the 27th and Friday the 28th are the same story – messy cross winds ruining the potential. Don’t even bother.
The weekend doesn’t get much better. Saturday the 29th drops to 6ft from the ENE, but the wind finally turns to a clean cross-off from the SW at 12 mph. The energy is moderate (404), but it’s still a marginal call. Sunday the 30th is smaller, about 4ft, with light cross-on winds, and Monday the 31st is more of the same with light rain. A lot of waiting.
Now, Tuesday the 1st of September is where it wakes up. We’ve got 7ft of SSW swell with a clean cross-off breeze from the SW (12 mph). The energy is moderate (823), and it’s clean. Not a classic, but your first real chance to get wet.
Wednesday the 2nd of September morning is a nice little window. Clean conditions with a light cross-off breeze from the SSW at 6 mph, and 4ft of ENE swell. The energy is moderate (467). It’s small, but it’s clean and fun.
The real standout is Thursday the 3rd of September morning. The forecast shows a solid 6ft of S swell, with a glassy, clean cross-off breeze from the SW at only 3 mph. The energy is a solid moderate (803), and the conditions are expected to be “very good.” The direction (S) matches the break’s optimum (SE) well, so it should be clean and lined up. This is a week out, so it’s promising but not set in stone.
After that, it fades. The 4th of September has a tiny 3ft S swell with glassy conditions, nice for a log. The 5th and 6th are small and clean, but nothing to write home about. The 7th and 8th look like a return to poor, onshore wind.
Then, Thursday the 10th of September morning throws a big one. We’ve got a powerful 8ft SE swell with a 10-second period, and the energy is strong (1316). The wind is light and cross from the NNE at 6 mph. That’s a serious, heavy swell, and at 8ft, it’s strictly for experts. The break is exposed, so it’s going to be a beast. The afternoon brings similar size (7ft) but with stronger, choppy cross-on wind. That morning window is a proper, heavy option for the experienced crew.
So, bottom line: the first week is pretty much a blank. Thursday the 3rd of September morning is the best bet for clean, quality waves. The big swell on Thursday the 10th of September morning is a heavy, expert-only session. Water temp is about 65°F, which is normal for this time of year.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Fri afternoon, min 17°C on Wed night). Winds decreasing (fresh winds from the NNE on Thu afternoon, calm by Fri night). | Days 5-7 Weather SummaryHeavy rain (total 29mm), heaviest during Mon morning. Warm (max 21°C on Sat afternoon, min 17°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Wed 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
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 14 | SSE 14 | SSE 14 | SSE 13 | NE 7 | NE 8 | NE 8 | NE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ESE 8 | SSW 7 | S 7 | S 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 2152 | 1822 | 979 | 690 | 331 | 392 | 594 | 754 | 379 | 387 | 351 | 243 | 249 | 308 | 322 | 274 | 254 | 414 | 285 | 237 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-on | cross-on | cross | cross-on | cross-on | glassy | cross-off | cross-off | cross-off |
High Tide | 00:57AM0.64m | 2:11PM0.67m | 1:26AM0.68m | 2:29PM0.66m | 1:56AM0.71m | 2:49PM0.64m | 2:29AM0.72m | 3:10PM0.61m | 3:03AM0.71m | 3:32PM0.57m | 3:40AM0.67m | 3:55PM0.52m | 10:23PM0.25m | |||||||
Low Tide | 8:01PM0.25m | 8:02AM-0.05m | 8:27PM0.24m | 8:36AM-0.05m | 8:54PM0.23m | 9:11AM-0.03m | 9:22PM0.23m | 9:48AM0.03m | 9:51PM0.23m | 10:30AM0.12m | 10:20PM0.24m | 11:25AM0.22m | 8:38PM0.25m | |||||||
 |  | | | | | |  |  | |  |  | |  |  | | |  | | | |
 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — |
 | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 3 | 1 | 4 | 13 | 5 | 2 | — | — | — |
Temp °C | 22 | 17 | 24 | 23 | 19 | 28 | 29 | 22 | 25 | 21 | 19 | 19 | 19 | 19 | 20 | 20 | 19 | 20 | 19 | 16 |
Feels °C | 19 | 15 | 22 | 20 | 17 | 25 | 27 | 23 | 26 | 20 | 19 | 21 | 20 | 20 | 22 | 19 | 19 | 17 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | SSE 14 | SSE 14 | SSE 14 | SSE 13 | SSE 12 | SSE 12 | SSE 11 | NE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | SE 8 | ESE 8 | ENE 10 | ENE 10 | S 8 |
| kJ | 2152 | 1822 | 979 | 690 | 278 | 119 | 68 | 522 | 379 | 387 | 351 | 243 | 249 | 308 | 322 | 191 | 254 | 179 | 214 | 217 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSE 10 | SE 10 | SSE 10 | SSE 10 | S 6 | SSE 7 | SSE 7 | SE 8 | ENE 9 | ENE 9 | ESE 9 | ESE 9 | ENE 10 |
| kJ | — | — | — | — | — | — | — | 42 | 25 | 10 | 10 | 25 | 93 | 147 | 221 | 274 | 194 | 161 | 124 | 237 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | ESE 5 | — | — | — | S 8 | — | ENE 11 | — | ESE 9 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 9 | — | — | — | 1 | — | 69 | — | 101 |
Wind waves Height (m) Direction Period (s) | NE 4 | NE 5 | NE 6 | NE 6 | NE 7 | NE 8 | NE 8 | NE 8 | SW 3 | SSW 4 | S 4 | — | — | — | — | — | — | SSW 7 | S 7 | — |
| kJ | 34 | 44 | 112 | 219 | 331 | 392 | 594 | 754 | 5 | 16 | 13 | — | — | — | — | — | — | 414 | 285 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 115 | 12 | 25 | 41 | 41 | 41 | 215 | 2 | 11 | 42 | 0 | 12 | 2 | 2 | 2 | 2 | 0 | 2 | 85 | 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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