
Surf Forecasts:
Rosa surf forecast from 11 Sep 2026:
- Best quality surf: Monday 14 Sep, 3AM (local time) - 3ft (0.9m), 12s period, S swell with glassy winds.
- Most powerful swell: Wednesday 16 Sep, 12AM (local time) - 5.5ft (1.7m), 10s period, E swell with 518 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 9PM (local time) - 3.5ft (1.0m), 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 Friday (Sep 11) at 9PM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.5m and 11s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Rosa in the next 16 days are 1.7m 10s and forecast to arrive on Wednesday (Sep 16) 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 1.4m 6s period and expected on Saturday (Sep 12) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Fri 11th Sep) | 3.5ft (1.0m) 8s |
| Best Surf | 3AM (Mon 14th Sep) | 3ft (0.9m) 12s |
| Most Powerful | 12AM (Wed 16th Sep) | 5.5ft (1.7m) 10s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's have a look at what's on the table for Rosa over the next couple of weeks.
It’s a bit of a mixed bag out here, folks. We’ve got a window of clean surf kicking things off, but the real standout is a solid pulse of swell near the end. The water is sitting at 62°, which is a solid 4° colder than it should be for this time of year, so that's notable – definitely a bit of a chill in the water.
The first real call to paddle out is this Friday afternoon at Rosa. We’re looking at a clean 3ft swell coming out of the ENE, nicely groomed by a light offshore breeze. The combined energy is moderate at best (212), so it’s not going to be big, but conditions will be clean and rideable. It's a solid starter sesh.
Saturday morning sees the swell jump a bit, but the wind turns cross-off. It's a bit messy and the forecast has a marginal vibe to it. Not the pick.
Hold on for Sunday afternoon. The swell drops back to 4ft from the SE, but we get a light offshore breeze again, and the report says "expect good surf conditions." Combined energy is still moderate (258), but it will be clean.
Now, Monday the 14th is interesting. The swell drops to 3ft but period jumps to a long-range 11 seconds. The wind goes absolutely glassy at times. That’s a clean, long-period groundswell with moderate energy (453). It might be a little inconsistent and the long period might make it wall up a bit on the beach, but if you time the tide and the sets, it’ll be worth the paddle.
Tuesday the 15th is looking like a top contender. By the morning, we’ve got a 6ft swell from the east with solid energy (662), clean faces from a cross-off breeze. The report is calling for "very good surf conditions" – that’s the first time we’ve heard that in the run. This is where you want to be.
The real monster, though, appears on Friday the 25th. We’ve got a 8ft swell on the charts for the morning – cross-off wind, clean as a whistle, with very high energy (576). That’s a powerful, clean day. But by the afternoon, it’s blowing up to a massive 10ft from the south with a phenomenal 1600 combined energy. That is a serious, serious swell. However, the file flat out says it will be too big for this break. That kind of size at Rosa is for experts and kamikazes only, and the wind will be up. Leave that afternoon session for the big wave chargers or the kite crew.
After that, there’s some raw, blown-out leftover swell for the final weekend. No good.
So, the standout window is Tuesday the 15th for that solid, clean east swell, and Friday morning the 25th if you want the biggest, cleanest waves of the forecast before it gets too nuts. Get on it.
This is Rusty, signing off.
Short Range ForecastHeavy rain (total 39mm), heaviest during Fri afternoon. Very mild (max 19°C on Fri afternoon, min 14°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Mon afternoon. Very mild (max 18°C on Wed morning, min 14°C on Mon afternoon). Wind will be generally light. | |||||||||||||||||||
Fri 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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) | ENE 8 | ENE 8 | S 6 | S 8 | S 7 | SE 8 | SE 8 | SE 8 | S 11 | S 11 | S 10 | E 8 | ENE 9 | E 10 | E 9 | E 9 | S 10 | S 8 | E 9 | S 11 |
Wave Graph | ||||||||||||||||||||
120 | 116 | 184 | 388 | 239 | 136 | 131 | 192 | 282 | 220 | 188 | 461 | 404 | 518 | 341 | 241 | 264 | 169 | 114 | 284 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | glassy | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | glassy | cross-on | cross-on |
High Tide | 1:26AM0.71m | 2:08PM0.57m | 2:01AM0.72m | 2:24PM0.58m | 2:37AM0.71m | 2:45PM0.58m | 3:14AM0.67m | 3:09PM0.58m | 3:54AM0.62m | 3:34PM0.56m | 4:36AM0.55m | 4:00PM0.53m | ||||||||
Low Tide | 8:38PM0.26m | 9:03AM0.03m | 8:57PM0.23m | 9:35AM0.12m | 9:05PM0.20m | 10:03AM0.22m | 8:01PM0.17m | 8:18AM0.31m | 8:10PM0.14m | 8:04AM0.34m | 8:33PM0.14m | 8:14AM0.37m | 12:59PM0.47m | 8:59PM0.17m | ||||||
— | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:11 | — | — | 6:11 | — | — | 6:09 | — | — | |
6:05 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | |
mm | 19 | — | — | — | — | — | 3 | 13 | 4 | 3 | 4 | 1 | — | 1 | — | — | — | — | — | — |
Temp °C | 19 | 18 | 17 | 17 | 15 | 15 | 16 | 14 | 15 | 16 | 15 | 17 | 17 | 15 | 18 | 17 | 16 | 17 | 17 | 17 |
Feels °C | 20 | 19 | 14 | 13 | 12 | 13 | 15 | 14 | 15 | 17 | 15 | 16 | 17 | 14 | 16 | 14 | 14 | 16 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 7 | SE 8 | SE 8 | SE 8 | S 11 | SE 9 | S 10 | E 8 | ENE 9 | E 10 | E 9 | E 9 | S 10 | S 8 | SSE 7 | S 11 |
120 | 116 | 67 | 50 | 239 | 136 | 131 | 192 | 282 | 142 | 188 | 461 | 404 | 518 | 341 | 241 | 264 | 169 | 114 | 284 | |
Swell 2 Height (m) Direction Period (s) | S 11 | S 11 | S 10 | E 12 | ENE 8 | SSW 7 | ENE 8 | ENE 8 | SE 8 | S 11 | ENE 8 | S 10 | S 10 | S 12 | S 10 | S 10 | E 9 | E 9 | E 9 | ESE 6 |
89 | 57 | 31 | 3 | 51 | 71 | 75 | 75 | 129 | 220 | 107 | 133 | 167 | 280 | 171 | 118 | 162 | 129 | 102 | 45 | |
Swell 3 Height (m) Direction Period (s) | S 6 | S 6 | E 12 | — | S 11 | ENE 8 | S 7 | S 12 | ENE 8 | ENE 7 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 12 | S 11 | S 11 | E 8 |
3 | 3 | 11 | — | 2 | 49 | 52 | 75 | 99 | 91 | 129 | 68 | 43 | 23 | 10 | 9 | 50 | 62 | 88 | 68 | |
Wind waves Height (m) Direction Period (s) | N 4 | — | S 6 | S 8 | — | — | — | ENE 8 | — | — | — | — | — | S 5 | S 5 | S 6 | — | — | NE 3 | NNE 4 |
10 | — | 184 | 388 | — | — | — | 125 | — | — | — | — | — | 21 | 57 | 86 | — | — | 5 | 10 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 11 | 2 | 24 | 2 | 2 | 0 | 2 | 2 | 0 | 0 | 0 | 2 | 0 | 0 | 24 | 0 | 0 | 12 | 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.










