Surf Forecasts:
Rosa surf forecast from 17 Jul 2026:
- Best quality surf: Tuesday 21 Jul, 3AM (local time) - 7ft (2.1m), 8s period, NE swell with offshore winds.
- Most powerful swell: Sunday 19 Jul, 3AM (local time) - 8ft (2.4m), 8s period, NE swell with 728 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 12AM (local time) - 6.5ft (2.0m), 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 Tuesday (Jul 21) at 12AM. The primary swell is predicted to be 2.0m and 8s period with a secondary swell of 1.7m and 8s. Another secondary swell of 0.2m and 11s 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 2.4m 8s and forecast to arrive on Sunday (Jul 19) 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 0.9m 5s period and expected on Tuesday (Jul 21) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 21st Jul) | 6.5ft (2.0m) 8s |
| Best Surf | 3AM (Tue 21st Jul) | 7ft (2.1m) 8s |
| Most Powerful | 3AM (Sun 19th Jul) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on the cards for Rosa. The water temperature is sitting at 60°F with a -6°F anomaly, which is way colder than normal for this time of year, so you’ll need a good thick winter suit if you’re even thinking about it.
Honestly, this stretch starts off pretty grim. We’ve got NE windswell running through the 17th to the 20th, but it’s blown out with cross-shore and cross-onshore winds, and the combined energy is moderate to strong (465 to 1145), but the quality is just poor. The swell is 6ft to 8ft, short period at 8 seconds, and the wind is a mess. The best you can say is it’s a write-off for a paddle board. If you’re into kite surfing, the consistent wind and lumpy ocean might be your thing, but for a surfboard, save your energy.
There’s a gap of a few days with no real recommendations until we hit Tuesday the 21st. Finally, the winds glass off, and we get a bit of hope. Tuesday morning the 21st sees glassy conditions with a light SW breeze, and a 5ft ENE swell at 8 seconds. The combined energy is moderate (381), and the conditions are described as good. It’s not a standout, but it’s a clean session for the early bird.
Wednesday the 22nd and Thursday the 23rd keep the clean theme going with cross-offshore winds and glassy conditions. The swell drops to 4ft to 4ft, but the period picks up to 10 seconds, and the water is clean. The combined energy stays moderate (325 to 480). This is small but fun, good for a longboard, and with the crowds listed as “sometimes,” you might get a few waves to yourself.
The real standout, and the one to circle on your calendar, is the 1st of August. Saturday morning the 1st brings a 5ft SSE swell at 13 seconds, clean with cross-offshore winds, and combined energy of 904 (strong). Then Saturday afternoon gets even better: a 5ft ESE swell at a very long 16 seconds, with combined energy rocketing up to 1450 (very strong). The wind is light and offshore, and the guidance says it’s excellent for experienced surfers. That long period groundswell will wrap nicely into the point breaks and reefs, but it might be too straight for the beach breaks. The swell direction is SE, which matches the optimum swell direction from the south-east, so Rosa should be on fire. This is the one to chase, but it’s a long way off, so keep an eye on the forecasts.
After that, the 30th and 31st look messy again with onshore winds, so don’t get your hopes up for the end of the run.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Sun morning, min 18°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 20mm), heaviest during Tue night. Warm (max 28°C on Mon afternoon, min 17°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||
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) | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 9 | NE 8 | NE 8 | NE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 10 | S 10 | SSE 10 | SSE 9 | SSE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 362 | 515 | 509 | 678 | 497 | 522 | 565 | 423 | 611 | 593 | 408 | 530 | 331 | 284 | 207 | 160 | 320 | 369 | 322 | 254 | 196 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross-off | glassy | glassy | cross-off | cross-off | cross-off | cross-off | glassy | cross | cross |
High Tide | 3:53PM0.50m | 8:29PM0.48m | 3:01AM0.66m | 4:10PM0.48m | 9:45PM0.42m | 3:44AM0.65m | 4:34PM0.48m | 10:51PM0.37m | 4:30AM0.61m | 5:03PM0.49m | 11:38PM0.34m | 5:20AM0.55m | 5:36PM0.48m | 00:06AM0.32m | 6:20AM0.48m | 12:23PM0.43m | 6:14PM0.46m | 7:50AM0.43m | 12:58PM0.49m | 7:05PM0.43m | |
Low Tide | 10:44AM0.00m | 6:18PM0.45m | 11:25AM0.07m | 7:14PM0.38m | 12:07PM0.16m | 8:06PM0.32m | 9:37AM0.29m | 12:54PM0.25m | 8:55PM0.29m | 9:28AM0.34m | 1:52PM0.33m | 9:43PM0.28m | 9:39AM0.38m | 3:06PM0.38m | 10:32PM0.29m | 3:17AM0.26m | 4:35PM0.40m | 11:47PM0.32m | |||
 | |  | | | | | |  | | | |  |  |  |  | |  | | | | |
 | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — |
 | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 13 | 1 | 1 | 4 | 3 | 2 | 2 |
Temp °C | 23 | 24 | 18 | 26 | 26 | 20 | 27 | 27 | 21 | 27 | 28 | 23 | 22 | 21 | 19 | 18 | 18 | 17 | 18 | 18 | 18 |
Feels °C | 20 | 21 | 16 | 23 | 23 | 18 | 24 | 24 | 19 | 25 | 26 | 21 | 24 | 23 | 21 | 18 | 18 | 17 | 20 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ENE 8 | SSE 16 | S 15 | NE 8 | S 13 | ENE 8 | ENE 8 | S 11 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 10 | S 10 | SSE 10 | SSE 9 | NE 8 |
| kJ | 88 | 57 | 38 | 444 | 26 | 38 | 408 | 12 | 433 | 365 | 10 | 365 | 331 | 284 | 207 | 160 | 320 | 369 | 322 | 254 | 196 |
Swell 2 Height (m) Direction Period (s) | SE 18 | SSE 16 | S 15 | ESE 10 | ESE 10 | SE 9 | S 13 | — | S 12 | S 12 | — | S 11 | S 10 | S 9 | S 8 | S 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | SSE 9 |
| kJ | 12 | 25 | 17 | 9 | 9 | 3 | 31 | — | 11 | 11 | — | 9 | 50 | 63 | 201 | 111 | 160 | 128 | 116 | 131 | 172 |
Swell 3 Height (m) Direction Period (s) | S 12 | S 12 | S 11 | S 13 | S 13 | — | S 8 | — | — | — | — | — | — | — | S 14 | S 10 | — | — | S 14 | S 12 | S 11 |
| kJ | 3 | 3 | 9 | 14 | 3 | — | 1 | — | — | — | — | — | — | — | 4 | 54 | — | — | 4 | 26 | 38 |
Wind waves Height (m) Direction Period (s) | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 9 | NE 8 | NE 8 | NE 8 | — | SSW 2 | — | — | — | — | — | — | — |
| kJ | 362 | 515 | 509 | 678 | 497 | 522 | 565 | 423 | 611 | 593 | 408 | 530 | — | 1 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 41 | 2 | 47 | 47 | 2 | 39 | 23 | 25 | 25 | 2 | 214 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 2 | 4 |
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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