
Surf Forecasts:
Rosa surf forecast from 7 Aug 2026:
- Best quality surf: Monday 10 Aug, 6AM (local time) - 8ft (2.4m), 13s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 9PM (local time) - 7ft (2.2m), 15s period, SSE swell with 2,038 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 6AM (local time) - 3.5ft (1.1m), 8s period with NE 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 (Aug 07) at 6AM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.4m and 10s. Another secondary swell of 1.0m and 5s 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 15s and forecast to arrive on Thursday (Aug 13) 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 4s period and expected on Saturday (Aug 08) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Fri 7th Aug) | 3.5ft (1.1m) 8s |
| Best Surf | 6AM (Mon 10th Aug) | 8ft (2.4m) 13s |
| Most Powerful | 9PM (Thu 13th Aug) | 7ft (2.2m) 15s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for the next couple of weeks.
Right off the bat, we’ve got a bit of a slow start. Surfable waves don’t really show up until Sunday the 9th, and even then it’s a bit of a wait. The first real standout window is Monday the 10th through Wednesday the 12th, with the best quality coming in on Monday itself.
The overall pattern is a mix of some solid, long-period groundswell and some periods of messy, short-period windswell. The real goods are gonna be the S and SSE swells that push through in the first half of the week, with clean conditions.
Rosa is an exposed, fairly consistent break that handles a SE swell best. The water temp is about average for this time of year, nothin’ wild to report.
The first real hope is Sunday the 9th. We’ll see a bump in size with a 8ft S swell, period around 11 seconds, and a moderate cross-offshore breeze. Clean conditions, but the energy is moderate (2322). It’s a build-up day.
Now, Monday the 10th is the pick of the bunch. The swell drops a touch to 7ft, but it’s pure S groundswell with a longer 13-second period and a consistent WSW to SW cross-offshore wind. The combined energy (1301) is solid, and the wind is a gentle breeze, leaving the face clean. This is excellent for experienced surfers. The crowd factor says “sometimes,” so you might see a few others out, but it’s worth it. Tuesday the 11th brings a similar vibe, with a 6ft S swell, 12-second period, and glassy conditions in the afternoon. A very good follow-up day.
Wednesday the 12th is a bit of a mixed bag. The swell shifts to a 6ft SSE, still 12 seconds, but the wind turns cross-shore with some rain. The surf is still there, but it’s not as clean as the previous days.
After that, things get messy. Thursday the 13th offers a last gasp of glassy morning conditions with a 5ft SSE swell, 12 seconds, and good energy (1059), but the wind is light and variable. By Friday the 14th, the wind turns onshore and the quality drops off a cliff.
The second week is a rough patch. From Saturday the 15th to around Tuesday the 19th, we’re stuck with short-period, weak E/ENE windswell (periods of 7-9 seconds) and mostly onshore or cross-onshore winds. The combined energy is low, mostly in the 300-500 range. Not worth paddling out. The blank run stretches for nearly a week.
The only glimmer in the second week is Thursday the 20th. A glassy morning with a 4ft SE swell, 12-second period, and a calm wind. The energy is moderate (673) and the conditions are clean. It’s a promising little window, but it’s a long way off and the swell is small. Friday the 21st is also okay, with a 5ft S swell and clean cross-offshore wind, but still more of a small-wave day.
So, the clear standout is Monday the 10th and Tuesday the 11th. Get in the water on Monday morning for the best of it – 7ft of clean S groundswell with a light offshore breeze. Tuesday’s glassy afternoon is a close second. Thursday the 20th is a long-range hope for a small, clean session, but don’t bank on it yet.
Stay stoked,
Rusty
Short Range ForecastModerate rain (total 12mm), heaviest on Sun morning. Very mild (max 18°C on Fri morning, min 12°C on Sun afternoon). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Wed morning. Very mild (max 15°C on Wed night, min 11°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | |||||||||||||||
AM | 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 | S 8 | S 11 | S 14 | S 14 | S 13 | S 8 | S 11 | S 11 | S 12 | S 12 | S 12 | S 11 | S 12 | S 12 | SSE 12 | S 12 | S 12 | SSE 11 | SSE 16 | SSE 14 |
Wave Graph | |||||||||||||||||||||
130 | 765 | 974 | 1627 | 1465 | 956 | 505 | 1344 | 959 | 1721 | 1820 | 1076 | 1029 | 1013 | 1334 | 1272 | 855 | 699 | 851 | 546 | 1728 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | glassy | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross | cross | cross | cross | cross | glassy | cross-off |
High Tide | 12:31PM0.61m | 6:54PM0.32m | 1:17PM0.70m | 1:12AM0.38m | 2:00PM0.75m | 1:17AM0.39m | 2:42PM0.76m | 00:31AM0.44m | 3:20PM0.73m | 00:37AM0.52m | 3:50PM0.67m | 1:04AM0.60m | 3:20PM0.59m | 1:37AM0.66m | |||||||
Low Tide | 5:46PM0.32m | 9:34PM0.29m | 4:54AM0.17m | 7:11PM0.29m | 5:56AM0.09m | 7:43PM0.29m | 6:49AM0.01m | 8:11PM0.30m | 7:35AM-0.05m | 8:37PM0.33m | 8:17AM-0.09m | 9:02PM0.35m | 8:57AM-0.08m | 9:26PM0.35m | |||||||
6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | |
— | 5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | |
mm | — | — | — | 2 | 1 | — | 6 | 2 | 1 | — | — | — | — | — | 1 | 8 | 6 | — | 3 | — | 1 |
Temp °C | 18 | 17 | 14 | 16 | 18 | 17 | 14 | 13 | 13 | 13 | 14 | 14 | 13 | 13 | 13 | 14 | 14 | 15 | 17 | 19 | 17 |
Feels °C | 16 | 12 | 11 | 13 | 17 | 17 | 10 | 10 | 10 | 9 | 9 | 11 | 11 | 12 | 12 | 13 | 12 | 13 | 17 | 21 | 17 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | S 11 | S 14 | S 14 | S 13 | S 12 | S 11 | S 11 | S 12 | S 12 | S 12 | S 11 | S 12 | S 12 | SSE 12 | S 12 | S 12 | SSE 11 | S 12 | SSE 14 |
130 | 80 | 974 | 1627 | 1465 | 956 | 505 | 1068 | 959 | 1311 | 1311 | 1076 | 1029 | 1013 | 1334 | 1272 | 855 | 699 | 851 | 528 | 1728 | |
Swell 2 Height (m) Direction Period (s) | SSE 8 | — | ENE 8 | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 5 | ENE 6 | SSE 16 | ENE 6 |
13 | — | 54 | — | — | 96 | 47 | 30 | 31 | 35 | 71 | 48 | 26 | 26 | 23 | 11 | 5 | 23 | 28 | 546 | 57 | |
Swell 3 Height (m) Direction Period (s) | S 10 | — | — | — | — | — | E 15 | — | E 13 | — | — | — | ENE 8 | — | — | ENE 8 | — | — | NE 6 | SE 6 | NNE 6 |
17 | — | — | — | — | — | 4 | — | 3 | — | — | — | 26 | — | — | 11 | — | — | 32 | 49 | 16 | |
Wind waves Height (m) Direction Period (s) | SSW 3 | S 8 | — | NE 8 | NE 5 | S 3 | S 8 | S 11 | — | S 12 | S 12 | — | — | — | — | — | ENE 5 | NE 5 | — | NE 5 | — |
5 | 765 | — | 122 | 85 | 4 | 478 | 1344 | — | 1721 | 1820 | — | — | — | — | — | 19 | 37 | — | 34 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 24 | 250 | 0 | 41 | 25 | 24 | 7 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 4 | 3 | 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.











