
Surf Forecasts:
Rosa surf forecast from 2 Aug 2026:
- Best quality surf: Sunday 9 Aug, 3AM (local time) - 7ft (2.2m), 9s period, S swell with glassy winds.
- Most powerful swell: Sunday 9 Aug, 3AM (local time) - 7ft (2.2m), 9s period, S swell with 732 kJ wave energy.
- Next surfable swell (1★+): Sunday 2 Aug, 9AM (local time) - 4.5ft (1.4m), 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 Sunday (Aug 02) at 9AM. The primary swell is predicted to be 1.4m and 8s period with a secondary swell of 0.1m and 10s. Another secondary swell of 0.4m and 3s is also forecast. 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 9s and forecast to arrive on Sunday (Aug 09) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Saturday (Aug 08) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sun 2nd Aug) | 4.5ft (1.4m) 8s |
| Best Surf | 3AM (Sun 9th Aug) | 7ft (2.2m) 9s |
| Most Powerful | 3AM (Sun 9th Aug) | 7ft (2.2m) 9s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright, let’s break down this 16-day stretch, and I’ll tell you right now, there’s a big lull to start, and then a real shot of adrenaline in the middle.
The first couple of days are weak sauce. Starting Sunday, August 2nd, we’ve got a small, weak ENE swell rolling into Rosa, maybe 5ft at 8 seconds. A light cross-off breeze keeps it clean-ish, so you might grab a few soft ones, but the energy is weak (218). Water temp is about normal. It’s a mushy, small-wave day.
Monday the 3rd is a straight-up skunk. The swell drops to 3ft, the wind is all cross-on, and the surface is a mess. Not worth paddling out. This weak pattern hangs around for a few days. Tuesday the 4th sees a little more period (12 seconds), but still only 3ft of swell, and the energy is moderate at best (412 and 338). The wind is still messing things up. Wednesday the 5th has a glassy morning with a tiny 3ft SSE swell, which will be pretty, but incredibly small. It’s a grovel fest. Thursday and Friday are more of the same, weak and disorganized.
Saturday, August 8th, the afternoon has a bit more push with 5ft of swell, but a strong cross-shore wind turns it into a choppy, bumpy mess. Not your friend.
Now, Sunday, August 9th is when the ocean remembers how to surf. A 7ft S swell with a 9-second period rolls in, the energy jumps into the strong range (807), and it’s glassy in the morning. That’s a massive improvement. The swell direction matches the optimum, so it’s got some punch. The afternoon has similar size and a bit of a cross-on breeze.
But Monday, August 10th, is the big one. The forecast is for a solid 12ft SSW groundswell with a 12-second period. The energy is at a ridiculous 5771, which is just pumping. The wind is light and it’s glassy. But for Rosa, this is too much. It’s an exposed spot, and this much water will be a full-on, hold-your-breath, hold-on-to-your-board kind of day. This is expert territory only. It’s a day to sit on the beach and watch. The afternoon drops a bit to 8ft, but still huge.
Tuesday the 11th, the swell backs down to 7ft and 7ft, with strong energy (1625 and 1222), but the winds are cross-shore, making the waves look a little lumpy and hard to read.
Wednesday, August 12th, is your day. This is the standout. A 6ft S swell with a 12-second period, strong energy (1110), and it’s glassy in the morning with a light offshore breeze. It’s going to be clean and lined up. The afternoon is even better, with the swell at 5ft, the energy at a strong (723), and the wind going totally calm. This is perfection. For experienced surfers, this is as good as it gets. This is the day to call in sick.
After that, the swell fades out. Thursday the 13th has some clean, light cross-off winds and a 4ft S swell, so you’ll find some fun ones. But Friday, the wind goes onshore and the quality tanks. The weekend sees more size, 5ft to 7ft, but the wind is straight onshore and it’s just a choppy, blown-out mess.
So, to sum it up: don’t even bother until the second week. The window from the 9th to the 12th is where it’s at, and Wednesday the 12th is the clear winner for clean, powerful surf. Just remember that Monday the 10th is a monster that’s too big for Rosa. Get after the 12th.
Rusty out.
Short Range ForecastMostly dry. Warm (max 24°C on Mon afternoon, min 16°C on Sun afternoon). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Thu afternoon. Warm (max 28°C on Fri afternoon, min 17°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | ||||||||||||||
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) | NE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 7 | NE 7 | S 12 | S 11 | SSE 11 | SSE 10 | SSE 10 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 |
Wave Graph | |||||||||||||||||||
301 | 213 | 173 | 138 | 107 | 122 | 143 | 271 | 257 | 194 | 136 | 131 | 92 | 88 | 88 | 90 | 71 | 76 | 183 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-on | cross | cross-on | cross-on | cross | cross | cross-off | cross-off | glassy | on | cross | glassy | cross-on | cross | cross | cross-off | cross-off |
High Tide | 3:22AM0.68m | 4:15PM0.59m | 4:00AM0.66m | 4:45PM0.55m | 4:42AM0.61m | 5:16PM0.49m | 10:32PM0.34m | 5:32AM0.55m | 5:47PM0.43m | 11:32PM0.35m | 6:39AM0.48m | 6:19PM0.37m | 12:31PM0.61m | 6:54PM0.32m | |||||
Low Tide | 10:34PM0.29m | 10:55AM0.05m | 11:15PM0.29m | 11:45AM0.12m | 00:06AM0.30m | 12:49PM0.21m | 9:14PM0.34m | 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 | |||
— | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | |
— | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | 5 | — | — | — | 4 |
Temp °C | 19 | 19 | 19 | 17 | 22 | 24 | 19 | 22 | 22 | 18 | 21 | 20 | 18 | 22 | 21 | 18 | 26 | 28 | 20 |
Feels °C | 18 | 19 | 19 | 17 | 21 | 23 | 18 | 22 | 22 | 19 | 22 | 21 | 19 | 24 | 22 | 20 | 26 | 26 | 21 |
Swell 1 Height (m) Direction Period (s) | S 10 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | SSW 7 | S 12 | NE 7 | S 11 | SSE 11 | SSE 10 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | SSE 6 | S 6 | S 7 |
8 | 213 | 173 | 138 | 107 | 15 | 143 | 88 | 257 | 194 | 136 | 76 | 70 | 88 | 88 | 66 | 45 | 28 | 37 | |
Swell 2 Height (m) Direction Period (s) | S 8 | S 10 | SSW 6 | SSW 5 | SSW 6 | SSE 13 | SE 11 | S 12 | ENE 7 | ENE 7 | ENE 7 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | SSE 11 | ENE 8 | SE 8 | S 9 |
1 | 2 | 25 | 4 | 6 | 35 | 32 | 271 | 70 | 52 | 56 | 131 | 92 | 84 | 61 | 24 | 71 | 31 | 6 | |
Swell 3 Height (m) Direction Period (s) | — | — | S 10 | S 9 | S 15 | ESE 12 | — | SE 11 | ESE 10 | NE 7 | ESE 11 | S 12 | S 11 | SSE 13 | SSE 12 | S 9 | S 10 | S 10 | — |
— | — | 2 | 2 | 17 | 14 | — | 30 | 11 | 11 | 12 | 3 | 9 | 18 | 15 | 6 | 18 | 17 | — | |
Wind waves Height (m) Direction Period (s) | NE 7 | S 3 | — | — | — | NE 7 | NE 7 | N 4 | — | — | — | NE 3 | NNE 4 | — | SSW 2 | S 8 | — | ENE 8 | NE 8 |
301 | 3 | — | — | — | 122 | 131 | 23 | — | — | — | 1 | 8 | — | 1 | 90 | — | 76 | 183 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 25 | 0 | 11 | 2 | 6 | 2 | 4 | 3 | 24 | 0 | 0 | 12 | 3 | 0 | 11 | 4 | 29 | 23 | 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.











