
Surf Forecasts:
Rosa surf forecast from 3 Sep 2026:
- Best quality surf: Monday 7 Sep, 9AM (local time) - 7ft (2.2m), 10s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 12PM (local time) - 6.5ft (2.0m), 11s period, S swell with 917 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 1.4m 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 2.0m 11s and forecast to arrive on Monday (Sep 07) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 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 | 9AM (Mon 7th Sep) | 7ft (2.2m) 10s |
| Most Powerful | 12PM (Mon 7th Sep) | 6.5ft (2.0m) 11s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about Rosa. This is the only spot on the cards for the next couple of weeks, so we’re working with what we’ve got.
The first bit of this outlook is pretty slow. There’s a bit of energy showing on Wednesday the 2nd with a 7ft swell from the southeast and an 11-second period, but the wind is cross-on and the water’s a clean 66° – that’s bang on average for this time of year. The combined energy is solid at (1209), but the conditions are tricky. Thursday and Friday are a write-off with poor surf and messy winds, so don’t bother paddling out until things settle down.
The first real glimmer comes on Saturday the 5th. It’s not big – around 4ft to 4ft from the south, period dropping to 8-9 seconds – but we’ve got clean cross-off winds and light rain. The combined energy picks up to (378) in the morning and (559) in the afternoon. It’s not a standout, but it’s rideable and clean for an intermediate surfer. Sunday morning holds similar vibes but drops off quickly in the afternoon as the wind swings and chop builds.
Now, Monday the 7th is the standout for the entire forecast. We’ve got a 7ft swell from the south-southwest with a 10-second period, combined energy jumping to (1453), and the wind is light and cross-off. This is clean, powerful, and well-shaped for experienced surfers. The swell direction aligns with Rosa’s optimum from the southeast, so expect proper waves. The crowds are only sometimes an issue, so you might have it to yourself if you pick your moment. This is the best on offer by a long shot.
After that, things get patchy. Tuesday the 8th has some knee-high leftovers but tricky wind. Wednesday the 9th is blown out. Then Thursday the 10th brings a surprise: glassy conditions with a 7ft swell from the east-northeast in the morning. Combined energy is (616), and it’s clean – this is another good window but the swell is a bit short period at 8 seconds.
From there, it’s a slow grind. A few mornings with clean cross-off winds and small swell (4ft to 5ft) pop up on the 12th and 14th, but nothing special. The 14th has a glassy morning with a 6ft northeast swell, combined energy (575), which is worth a look if you’re desperate. The 16th also offers a glassy morning with a 4ft south swell, 11-second period, and combined energy (441) – clean but small.
The last few days (17th onwards) are messy with onshore winds and lumpy conditions. No real standouts in the second week beyond those brief glassy windows. Overall, Monday the 7th is your best bet – don’t sleep on it. The rest of the period is mostly marginal, with long gaps of flat or poor conditions.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Fri night. Warm (max 24°C on Thu morning, min 12°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sat afternoon. Very mild (max 17°C on Tue morning, min 10°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | ||||||||||||||
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 11 | SE 11 | SE 11 | SE 10 | ENE 8 | ENE 8 | S 9 | S 8 | SSW 9 | SSW 8 | S 7 | S 9 | SSW 10 | S 11 | S 10 | SSE 10 | SSE 9 | SSE 9 |
Wave Graph | ||||||||||||||||||||
996 | 850 | 524 | 377 | 224 | 106 | 95 | 160 | 181 | 245 | 297 | 207 | 287 | 767 | 842 | 329 | 630 | 563 | 431 | 177 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | off | cross | cross-on | cross |
High Tide | 4:16PM0.47m | 11:17PM0.27m | 5:09AM0.54m | 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 | |||||
Low Tide | 8:31PM0.23m | 8:18AM0.43m | 2:21PM0.39m | 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 | ||||||
— | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | |
6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:02 | — | — | 6:02 | — | |
mm | — | — | — | — | — | — | 1 | 6 | 2 | 2 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 14 | 24 | 24 | 18 | 16 | 15 | 14 | 13 | 14 | 13 | 15 | 13 | 12 | 14 | 13 | 11 | 17 | 17 | 15 |
Feels °C | 15 | 12 | 22 | 21 | 17 | 14 | 12 | 12 | 11 | 11 | 10 | 10 | 8 | 8 | 10 | 9 | 9 | 13 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SE 11 | SE 11 | SE 11 | NE 6 | SE 10 | ENE 8 | S 7 | S 9 | S 8 | S 9 | S 8 | S 10 | ENE 8 | S 10 | S 11 | S 10 | SSE 10 | SSE 9 | E 7 |
996 | 850 | 524 | 377 | 77 | 106 | 95 | 123 | 181 | 173 | 210 | 108 | 73 | 21 | 587 | 329 | 630 | 563 | 431 | 135 | |
Swell 2 Height (m) Direction Period (s) | ENE 9 | ENE 9 | ENE 9 | S 11 | SE 11 | NE 6 | SE 10 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | SSE 9 |
100 | 71 | 42 | 2 | 224 | 29 | 64 | 160 | 160 | 125 | 70 | 50 | 35 | 6 | 22 | 21 | 20 | 19 | 5 | 177 | |
Swell 3 Height (m) Direction Period (s) | ENE 9 | — | S 12 | — | ENE 8 | ENE 8 | S 9 | SE 10 | SE 10 | SE 10 | SE 10 | SSE 9 | — | — | NE 8 | — | — | — | S 16 | S 14 |
113 | — | 3 | — | 38 | 36 | 2 | 49 | 37 | 16 | 16 | 27 | — | — | 2 | — | — | — | 5 | 16 | |
Wind waves Height (m) Direction Period (s) | — | NNE 3 | NNE 4 | NNE 5 | NNE 6 | SSW 5 | S 6 | — | — | S 8 | SSW 9 | SSW 8 | S 7 | S 9 | SSW 10 | S 7 | — | — | NE 3 | NNW 3 |
— | 3 | 34 | 128 | 126 | 38 | 60 | — | — | 245 | 297 | 207 | 287 | 767 | 842 | 131 | — | — | 6 | 2 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 24 | 23 | 29 | 2 | 0 | 7 | 24 | 0 | 0 | 0 | 0 | 0 | 24 | 0 | 0 | 2 | 0 | 4 | 71 | 23 |
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.










