Surf Forecasts:
Rosa surf forecast from 25 Aug 2026:
- Best quality surf: Monday 31 Aug, 12AM (local time) - 6.5ft (2.0m), 9s period, E swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 6AM (local time) - 7.5ft (2.3m), 15s period, SSE swell with 2,242 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 6PM (local time) - 6.5ft (2.0m), 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 (Aug 28) at 6PM. The primary swell is predicted to be 2.0m and 8s period with a secondary swell of 0.4m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rosa in the next 16 days are 2.3m 15s and forecast to arrive on Wednesday (Aug 26) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Saturday (Aug 29) at 9AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Fri 28th Aug) | 6.5ft (2.0m) 8s |
| Best Surf | 12AM (Mon 31st Aug) | 6.5ft (2.0m) 9s |
| Most Powerful | 6AM (Wed 26th Aug) | 7.5ft (2.3m) 15s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's get into it.
Right off the bat, we've got some solid swell on the way for Rosa. The water temp is sitting right around average for this time of year at 66°, so no surprises there.
The action kicks off Tuesday morning, the 25th of August. We're looking at a clean 6ft south swell, with a nice 12-second period. The energy is decent, and the wind is dead glassy. This is your window for experienced surfers to get some proper waves. The afternoon turns to junk though, so make sure you're out early.
Wednesday the 26th brings a bigger pulse from the SSE, hitting 8ft with a 14-second period. That's a long-period groundswell, and the energy is pumping. However, the wind is a cross-shore, and conditions are a bit chopped. This is definitely expert territory at that size, and the onshore wind in the afternoon trashes it.
Thursday the 27th drops a touch to 6ft, but again, SSE swell with a 14-second period. The wind is cross-shore, making it tricky. It's a marginal day for the more experienced crew.
Friday the 28th sees a shift to a shorter period, 8-second, northeast swell. The morning is a bit of a mess, but the afternoon brings a lighter cross-shore breeze with 7ft waves. It's still a bit lumpy, but it's a slight improvement.
Then we get a bit of a lull. Saturday the 29th and Sunday the 30th are small, with the swell dropping to 5ft from the ENE. The wind stays clean though, especially Sunday afternoon with glassy conditions. It's small, but it's rideable.
Monday the 31st of August is the standout for the first week. The swell is 6ft from the ENE, period around 9 seconds, and the wind goes clean cross-off. The energy is moderate. This is a solid, clean surf session for the intermediate crew.
The first week of September is a mixed bag. Tuesday the 1st and Wednesday the 2nd are bigger, around 7ft to 8ft, but the wind is cross-shore and choppy, making it a mess. Thursday the 3rd and Friday the 4th drop right down to 3ft, but Friday morning is absolutely glassy. If you've got a longboard, that's your moment.
The second week is a bit of a gamble. Saturday the 5th of September looks poor, but Sunday the 6th brings a solid 7ft to 7ft northeast swell with a short period. The wind is light cross-on, so it's messy but has some power.
The best bet in the whole 16-day window is Monday the 7th of September. We've got a clean 6ft ENE swell, with a light cross-off wind. The energy is solid, and it's described as "very good." This is the one to circle on the calendar.
After that, it fades out. Tuesday the 8th and Wednesday the 9th are small and onshore, and the run ends there.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Fri morning, min 13°C on Tue night). Winds increasing (light winds from the N on Tue night, fresh winds from the NNE by Thu afternoon). | Days 5-7 Weather SummaryHeavy rain (total 50mm), heaviest during Mon morning. Warm (max 29°C on Fri afternoon, min 18°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Tue 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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) | S 12 | SSE 16 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 13 | NE 7 | NE 8 | NE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | E 9 | ESE 7 | ENE 8 | E 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 926 | 788 | 2152 | 2152 | 1822 | 979 | 690 | 362 | 423 | 585 | 475 | 454 | 485 | 424 | 315 | 308 | 664 | 455 | 614 | 401 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross-off | cross | cross-off | glassy | cross-on | cross-off | cross-off | cross-off | off |
High Tide | 00:28AM0.58m | 1:55PM0.67m | 00:57AM0.64m | 2:11PM0.67m | 1:26AM0.68m | 2:29PM0.66m | 1:56AM0.71m | 2:49PM0.64m | 2:29AM0.72m | 3:10PM0.61m | 3:03AM0.71m | 3:32PM0.57m | ||||||||
Low Tide | 7:34PM0.27m | 7:27AM-0.02m | 8:01PM0.25m | 8:02AM-0.05m | 8:27PM0.24m | 8:36AM-0.05m | 8:54PM0.23m | 9:11AM-0.03m | 9:22PM0.23m | 9:48AM0.03m | 9:51PM0.23m | 10:30AM0.12m | 10:20PM0.24m | |||||||
 |  |  | | | | | | | |  | | |  |  |  |  |  | | | |
 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — |
 | 5:57 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 6 | 18 | 22 | 15 | 2 |
Temp °C | 18 | 14 | 22 | 22 | 18 | 23 | 24 | 19 | 28 | 29 | 21 | 24 | 21 | 19 | 19 | 19 | 20 | 18 | 18 | 18 |
Feels °C | 15 | 12 | 19 | 19 | 17 | 20 | 21 | 17 | 26 | 28 | 24 | 25 | 21 | 20 | 22 | 21 | 22 | 19 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 13 | SSE 12 | SSE 12 | SSE 11 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | — | ENE 8 | E 8 |
| kJ | 926 | 686 | 2152 | 2152 | 1822 | 979 | 690 | 278 | 119 | 68 | 475 | 454 | 485 | 424 | 315 | 308 | 274 | — | 614 | 401 |
Swell 2 Height (m) Direction Period (s) | — | SSE 16 | — | — | — | — | — | — | — | — | SSE 10 | SSE 10 | SSE 10 | SSE 11 | S 6 | SSE 6 | SE 6 | — | SE 7 | SSE 7 |
| kJ | — | 788 | — | — | — | — | — | — | — | — | 42 | 20 | 10 | 11 | 25 | 34 | 95 | — | 209 | 75 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 7 | SSE 10 | SSE 10 | SE 10 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 10 | 10 | 4 | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 3 | NNE 4 | NNE 4 | NE 4 | NE 5 | NE 6 | NE 6 | NE 7 | NE 8 | NE 8 | — | SSW 4 | SSW 4 | SSW 4 | — | — | E 9 | ESE 7 | — | — |
| kJ | 6 | 10 | 16 | 41 | 74 | 132 | 206 | 362 | 423 | 585 | — | 8 | 7 | 5 | — | — | 664 | 455 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 12 | 3 | 4 | 115 | 12 | 2 | 41 | 41 | 63 | 25 | 2 | 11 | 11 | 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.
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