
Surf Forecasts:
Rosa surf forecast from 31 Jul 2026:
- Best quality surf: Monday 3 Aug, 9PM (local time) - 3.5ft (1.0m), 7s period, ENE swell with glassy winds.
- Most powerful swell: Friday 7 Aug, 3AM (local time) - 4.5ft (1.4m), 11s period, S swell with 502 kJ wave energy.
- Next surfable swell (1★+): Sunday 2 Aug, 12PM (local time) - 4.5ft (1.3m), 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 12PM. The primary swell is predicted to be 1.3m and 8s period with a secondary swell of 0.1m 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 1.4m 11s and forecast to arrive on Friday (Aug 07) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 7s period and expected on Sunday (Aug 02) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Sun 2nd Aug) | 4.5ft (1.3m) 8s |
| Best Surf | 9PM (Mon 3rd Aug) | 3.5ft (1.0m) 7s |
| Most Powerful | 3AM (Fri 7th Aug) | 4.5ft (1.4m) 11s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at the next couple of weeks down at Rosa. To be straight with you, it’s a bit of a slow burn for a while, but there are a couple of windows where it could get fun. Don't go booking the week off just yet, but keep an eye on the forecast.
The first week is pretty ordinary, with a lot of onshore and cross-shore wind messing things up. We've got surf, but it's mostly choppy and lumpy. It’s not until the middle of next week that we start to see some cleaner conditions and more organized swell.
The water temp is about average for this time of year, so nothing crazy there, just your typical summer suit.
So, for the early part, Friday the 31st through Monday the 3rd of August, it’s a write-off for good waves. The swell is there, but it's short-period, wind-blown junk. The energy is all over the place, with readings in the 250 to 370 range (moderate at best), but it doesn’t matter when the wind has it all chopped out. You're better off staying home.
Tuesday the 4th is when things start to turn. Tuesday morning at Rosa looks like our first real chance. The wind goes light and offshore, cleaning up the 3ft of south swell. The period is a solid 11 seconds, so there’s some push behind it. The energy is reading 328 (moderate), but the clean conditions will make it feel better than the number. It's still small, only head-high on the sets, but it will be glassy and lined up. Wednesday the 5th afternoon also looks decent with a clean, cross-off breeze and a 3ft south swell, but the morning is a bit meh.
Then we hit another patch of mediocrity. Thursday and Friday have some clean moments but the swell drops off or the wind turns onshore again. It’s frustrating.
Now, let's look ahead to the real standout. The one to circle on the calendar is Tuesday the 11th of August, in the morning. The swell jumps up to 6ft from the south-southeast with a period of 11 seconds. The combined energy is a massive 767 (strong to very strong wave energy). The wind will be light and cross-shore, which isn't perfect, but it's not going to destroy it. This is the biggest, most powerful swell of the period, but it’s a bit of a beast. At 6ft, it's getting big, and with that energy, it will be too much for beginners. This one is for the experienced crew. The direction out of the SSE is good for the exposed points and reefs.
Before that, on Monday the 10th, there’s a smaller pulse of 4-5ft with clean conditions in the morning. It's more manageable, but not as powerful. And after the 11th, the wind turns north-northeast and gets fresh, blowing out the back half of the week. The 13th and 14th see the swell stick around at 6ft, but with that strong cross-onshore wind, it will be lumpy and messy. Looks more like a kite-surfing setup than a surfing one to be honest. All that energy and wind, but no clean face to ride.
So, the two standout windows are Tuesday morning, the 4th, for a clean, smaller session, and the real highlight, Tuesday morning, the 11th of August, for the biggest, most powerful swell. The long-range call is promising, but keep in mind, things can change. The conditions around the 11th are the best on offer, but don't expect perfection from the wind.
Stay stoked.
Rusty
Short Range ForecastMostly dry. Warm (max 22°C on Sat morning, min 15°C on Fri night). Winds decreasing (fresh winds from the NNE on Fri afternoon, light winds from the N by Sat night). | Days 5-7 Weather SummaryHeavy rain (total 27mm), heaviest during Tue night. Warm (max 24°C on Mon afternoon, min 16°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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) | S 9 | S 12 | S 12 | S 11 | NE 6 | NE 6 | NE 7 | ENE 8 | ENE 8 | ENE 8 | NE 8 | ENE 7 | S 12 | S 11 | S 11 | S 10 | ENE 8 | S 9 | S 9 |
Wave Graph | |||||||||||||||||||
96 | 243 | 174 | 112 | 157 | 293 | 341 | 213 | 150 | 138 | 221 | 114 | 148 | 202 | 191 | 133 | 85 | 164 | 198 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | cross | cross-on | cross | cross-off | cross | glassy | cross-on | cross-on | glassy | cross-off | cross | cross-off | cross-off | cross-off | glassy |
High Tide | 2:13AM0.67m | 3:20PM0.64m | 2:47AM0.69m | 3:47PM0.62m | 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 | |||||
Low Tide | 9:30PM0.29m | 9:37AM-0.02m | 10:00PM0.29m | 10:14AM0.00m | 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 | |||||
— | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | |
— | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 3 | 18 | 3 | 2 | — |
Temp °C | 17 | 20 | 20 | 16 | 22 | 22 | 19 | 19 | 20 | 17 | 23 | 24 | 20 | 20 | 19 | 18 | 17 | 17 | 17 |
Feels °C | 17 | 17 | 16 | 13 | 19 | 19 | 19 | 20 | 21 | 18 | 23 | 25 | 22 | 22 | 20 | 19 | 17 | 17 | 18 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 12 | S 12 | S 11 | S 10 | S 10 | S 10 | ENE 8 | ENE 8 | ENE 8 | NE 8 | ENE 7 | ENE 7 | S 11 | S 11 | ENE 8 | ENE 8 | S 9 | S 9 |
96 | 243 | 174 | 112 | 34 | 18 | 8 | 213 | 150 | 138 | 129 | 114 | 101 | 202 | 191 | 83 | 85 | 164 | 198 | |
Swell 2 Height (m) Direction Period (s) | ENE 7 | ESE 5 | E 8 | — | SE 9 | S 9 | S 9 | S 10 | S 10 | S 4 | S 15 | SSE 13 | S 12 | ENE 7 | ENE 7 | S 10 | S 6 | ENE 8 | ENE 8 |
28 | 2 | 1 | — | 3 | 2 | 1 | 2 | 2 | 1 | 17 | 60 | 148 | 97 | 97 | 133 | 31 | 83 | 85 | |
Swell 3 Height (m) Direction Period (s) | S 13 | SE 8 | — | — | E 11 | — | — | — | — | S 9 | SE 10 | ESE 11 | SE 11 | SE 11 | ESE 10 | ESE 10 | S 10 | S 12 | SE 9 |
92 | 2 | — | — | 2 | — | — | — | — | 2 | 4 | 13 | 31 | 29 | 11 | 11 | 68 | 3 | 21 | |
Wind waves Height (m) Direction Period (s) | — | NE 7 | NE 5 | NE 5 | NE 6 | NE 6 | NE 7 | SW 3 | SSW 5 | — | NE 8 | — | — | — | SSW 2 | SSW 4 | — | — | — |
— | 59 | 75 | 107 | 157 | 293 | 341 | 3 | 7 | — | 221 | — | — | — | 1 | 14 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 12 | 41 | 41 | 63 | 284 | 25 | 11 | 11 | 0 | 2 | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 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.











