
Surf Forecasts:
Rosa surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 6AM (local time) - 6ft (1.8m), 9s period, SSE swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 9PM (local time) - 8ft (2.5m), 9s period, S swell with 1,173 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 12AM (local time) - 3.5ft (1.0m), 11s period with SE 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 Friday (Sep 04) at 12AM. The primary swell is predicted to be 1.0m and 11s period with a secondary swell of 1.3m and 6s. 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 2.5m 9s and forecast to arrive on Sunday (Sep 06) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Friday (Sep 04) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 4th Sep) | 3.5ft (1.0m) 11s |
| Best Surf | 6AM (Mon 7th Sep) | 6ft (1.8m) 9s |
| Most Powerful | 9PM (Sun 6th Sep) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright folks, Rusty here, looking at what's on offer for the next couple of weeks. It's been a bit of a slow start, but we've got some real juice building towards the end of the run.
First up, Rosa's been a bit moody. Water temp is sitting at 66°, which is pretty much normal for this time of year, so no surprises there. The early part of the week is looking pretty average. We've got a modest swell on Thursday the 3rd, chest-high at 5ft from the SE with moderate energy (599), but that north wind is making a mess of things. It's cross-shore and choppy, so not really worth suiting up for. That carries on through Friday and Saturday with some cleaner, but much smaller, waves around the 2ft to 4ft mark. The energy is weak (166 to 344), and the period is short, so it's all a bit fat and gutless.
Now, Monday the 7th is where things start to get interesting. The morning session is a standout. We're looking at a solid 8ft swell from the SSE, with a decent 9-second period and clean conditions thanks to a light offshore breeze from the WSW. The energy is pumping (829), and that's the best wind we've seen all week. This is the one to circle. The afternoon shifts to an onshore, so get in early.
There's a bit of a lull mid-week, with onshore winds and choppy conditions keeping the quality down through Wednesday the 9th and Thursday the 10th. The swell is there, around 5ft, but the wind just isn't playing ball.
We get another clean-ish window on the 11th and 12th, with some cross-off wind and waist-to-chest high swell from the ENE, but it's not a standout. The real show is brewing for the second week.
Sunday the 13th is a big one. We've got a 8ft S swell rolling in, and the energy is massive (1230). The wind is a clean cross-off in the morning, but the tide and conditions might make it a bit tricky. This is a big, powerful swell, so it's one for the experienced crew. The afternoon gets a bit messy with the cross-shore wind.
But the two best windows are the last two days. Wednesday the 16th morning is glassy. A light 4ft S swell, dead calm, with only 369 energy. It's small but perfect. The real standout, however, is Thursday the 17th morning. Glassy conditions, a 5ft S swell and a 12-second period that's going to bring some real push. The energy is moderate (600), but with that light NNW wind, it's going to be a beautiful, clean morning. And then Friday the 18th is the big finale. The morning is showing 7ft of S swell with a 15-second period, clean cross-off wind, and a massive energy reading of 2079. This is solid groundswell, and it's got 'excellent' written all over it for experienced surfers. The long period will make it a bit wonky on a beach break, but at a spot like Rosa, it's a dream.
So, to sum it up: the first week is a bit of a grind with a few clean windows. But the second week is where it's at. Circle Monday the 7th morning for a good one, but the absolute best of the bunch is the morning of Thursday the 17th and the morning of Friday the 18th. That's the real payoff.
Stay stoked, catch you in the water.
Rusty
Short Range ForecastHeavy rain (total 21mm), heaviest during Fri night. Warm (max 24°C on Thu afternoon, min 11°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 16mm), heaviest on Sun night. Warm (max 23°C on Wed morning, min 11°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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) | SE 11 | SE 11 | SE 10 | ENE 8 | ENE 8 | S 9 | S 9 | S 8 | S 7 | S 9 | S 9 | SSE 9 | SSE 9 | SSE 9 | SE 10 | SSE 10 | ENE 6 | NE 8 | ENE 8 | ENE 8 |
Wave Graph | ||||||||||||||||||||
377 | 224 | 106 | 80 | 128 | 132 | 185 | 235 | 243 | 1026 | 567 | 606 | 484 | 441 | 452 | 230 | 215 | 267 | 441 | 453 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | glassy | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 4:34PM0.42m | 11:46PM0.30m | 6:19AM0.45m | 00:12AM0.32m | 12:31PM0.69m | 00:35AM0.35m | 1:10PM0.74m | 00:51AM0.39m | 1:47PM0.76m | 00:49AM0.44m | 2:19PM0.73m | 00:15AM0.51m | 2:42PM0.68m | 00:26AM0.59m | ||||||
Low Tide | 8:45PM0.21m | 7:57AM0.44m | 9:04PM0.22m | 3:27AM0.21m | 9:23PM0.26m | 4:42AM0.13m | 9:19PM0.31m | 5:42AM0.05m | 7:11PM0.32m | 6:31AM-0.02m | 7:29PM0.31m | 7:13AM-0.06m | 7:51PM0.30m | |||||||
— | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | |
6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:02 | — | — | 6:02 | — | — | 6:04 | — | |
mm | — | — | — | 3 | 11 | 4 | 3 | — | — | — | 1 | 2 | 2 | 4 | 2 | 1 | 4 | — | — | 3 |
Temp °C | 24 | 19 | 16 | 17 | 14 | 14 | 14 | 14 | 14 | 13 | 12 | 12 | 13 | 14 | 17 | 16 | 17 | 23 | 23 | 18 |
Feels °C | 21 | 18 | 14 | 15 | 13 | 13 | 12 | 11 | 8 | 7 | 7 | 11 | 13 | 12 | 16 | 14 | 15 | 21 | 21 | 17 |
Swell 1 Height (m) Direction Period (s) | SE 11 | NNE 6 | SE 10 | ENE 8 | ENE 8 | ENE 8 | S 9 | ENE 8 | ENE 8 | ENE 8 | S 9 | SSE 9 | SSE 9 | SSE 9 | SE 10 | SSE 10 | SSE 9 | E 8 | SSE 11 | ENE 8 |
377 | 57 | 106 | 80 | 128 | 131 | 185 | 68 | 35 | 21 | 567 | 606 | 484 | 441 | 452 | 230 | 146 | 133 | 161 | 348 | |
Swell 2 Height (m) Direction Period (s) | S 11 | SE 11 | NE 6 | SE 10 | S 6 | S 9 | ENE 8 | SE 10 | SSE 10 | — | ENE 8 | ENE 8 | ENE 8 | E 8 | NE 8 | S 16 | SSE 14 | S 11 | E 14 | S 10 |
2 | 224 | 22 | 64 | 49 | 132 | 99 | 16 | 11 | — | 13 | 19 | 19 | 10 | 9 | 5 | 21 | 125 | 4 | 75 | |
Swell 3 Height (m) Direction Period (s) | — | ENE 8 | ENE 8 | S 8 | SE 10 | SE 10 | SE 10 | S 14 | SE 10 | — | — | — | S 18 | ENE 8 | E 8 | S 16 | S 14 | SSE 9 | E 14 | — |
— | 39 | 37 | 1 | 63 | 37 | 37 | 15 | 4 | — | — | — | 6 | 7 | 5 | 5 | 37 | 64 | 4 | — | |
Wind waves Height (m) Direction Period (s) | NE 5 | NNE 6 | SSW 4 | S 5 | — | — | SW 3 | S 8 | S 7 | S 9 | — | — | — | — | NE 8 | ENE 6 | ENE 6 | NE 8 | ENE 8 | ENE 8 |
143 | 109 | 27 | 33 | — | — | 2 | 235 | 243 | 1026 | — | — | — | — | 14 | 69 | 215 | 267 | 441 | 453 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 2 | 0 | 42 | 4 | 0 | 2 | 0 | 2 | 2 | 80 | 2 | 0 | 0 | 12 | 2 | 4 | 2 | 2 | 2 | 12 |
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.










