Surf Forecasts:
Rosa surf forecast from 18 Aug 2026:
- Best quality surf: Monday 24 Aug, 3AM (local time) - 10ft (3.0m), 12s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 3AM (local time) - 10ft (3.0m), 12s period, S swell with 2,725 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 6PM (local time) - 5ft (1.6m), 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 Tuesday (Aug 18) at 6PM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.2m and 9s. 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 3.0m 12s and forecast to arrive on Monday (Aug 24) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Friday (Aug 21) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 18th Aug) | 5ft (1.6m) 8s |
| Best Surf | 3AM (Mon 24th Aug) | 10ft (3.0m) 12s |
| Most Powerful | 3AM (Mon 24th Aug) | 10ft (3.0m) 12s |
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 coming our way for Rosa.
Right off the bat, it’s a bit of a slow start. The first real surf we can get on is Tuesday the 18th of August, but it’s a messy one. A 7ft NE swell at 8 seconds is showing up with a light cross breeze, and the energy is moderate (966). It’s surfable if you’re desperate, but it’s far from clean.
Wednesday the 19th drops off to 4ft from the ENE, and while the wind turns cross-off in the morning, the overall energy is low (173). It’s ordinary. Thursday and Friday are pretty much a write-off with poor conditions and choppy seas.
Now, Saturday the 22nd morning brings a bit of hope. We’ve got a solid 7ft swell from the south at 8 seconds, with a clean cross-off breeze. The energy is strong (1076), but the waves are still a bit raw. It’s not the standout.
The real standout is Sunday the 23rd of August. Glassy conditions in the morning, with a clean 6ft south groundswell at 11 seconds. The energy is strong (740), and with no wind, these waves are going to be lined up and clean. This is the session to aim for. If you’re an intermediate, this is your window. The afternoon picks up to 6ft but gets a little cross-on, so hit it early.
Monday the 24th morning gets big – 10ft from the south at 13 seconds – but that’s expert territory. The energy is massive (2513), and it’s too big for most. The rest of the week after that fades into smaller, wind-affected slop, with the odd clean moment (like Saturday the 29th morning with a 4ft ENE and light offshore, but that’s small and low energy at 304).
Bottom line: Don’t waste your time on the early week slop. Sunday the 23rd morning is your best bet for clean, punchy lines at Rosa. After that, the second week looks mostly average with some small windows, but nothing that’ll make you miss work.
Stay stoked,
Rusty
Short Range ForecastMostly dry. Warm (max 33°C on Tue afternoon, min 17°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Fri morning, min 11°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 | ENE 8 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | S 9 | ENE 7 | ENE 7 | ENE 7 | SSW 7 | S 9 | S 8 | S 8 | S 8 | S 11 | S 11 | S 12 | S 13 | S 12 | S 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 555 | 365 | 280 | 165 | 116 | 81 | 106 | 183 | 40 | 102 | 259 | 732 | 589 | 372 | 381 | 714 | 819 | 1738 | 2508 | 1749 | 1151 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | glassy | cross-off | cross | cross-on | cross-on | cross-on | off | cross-off | cross-off | cross-off | cross-off | cross | glassy | glassy | cross-on | cross-off | cross-off | cross | glassy |
High Tide | 11:02AM0.33m | 4:15PM0.54m | 4:57AM0.55m | 12:02PM0.42m | 5:50AM0.48m | 12:30PM0.49m | 00:33AM0.28m | 7:15AM0.41m | 12:52PM0.54m | 00:32AM0.31m | 1:10PM0.58m | 7:31PM0.38m | 1:24PM0.61m | 11:38PM0.43m | 1:34PM0.64m | 00:01AM0.50m | |||||
Low Tide | 11:52AM0.33m | 8:52PM0.20m | 8:49AM0.34m | 1:09PM0.41m | 9:25PM0.21m | 8:57AM0.38m | 2:56PM0.45m | 9:57PM0.24m | 8:44AM0.40m | 5:09PM0.43m | 10:27PM0.29m | 4:11AM0.22m | 6:18PM0.38m | 5:19AM0.15m | 6:41PM0.33m | 6:09AM0.09m | 7:08PM0.30m | ||||
 |  |  | | | | | | | | | | | | | | |  | | | | |
 | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:37 | — | — |
 | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 32 | 33 | 22 | 20 | 20 | 18 | 23 | 23 | 19 | 20 | 19 | 14 | 14 | 13 | 13 | 15 | 15 | 12 | 15 | 14 | 13 |
Feels °C | 31 | 34 | 24 | 20 | 21 | 21 | 21 | 21 | 19 | 17 | 15 | 10 | 10 | 9 | 11 | 13 | 13 | 9 | 12 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 9 | NE 5 | ENE 7 | ENE 8 | ENE 8 | S 8 | ENE 9 | S 8 | S 11 | S 11 | ENE 8 | S 13 | S 12 | S 12 |
| kJ | 403 | 365 | 280 | 165 | 116 | 81 | 99 | 71 | 24 | 102 | 120 | 111 | 401 | 71 | 381 | 714 | 575 | 6 | 2508 | 1749 | 1151 |
Swell 2 Height (m) Direction Period (s) | S 10 | S 10 | S 9 | S 9 | S 9 | S 7 | S 9 | SE 12 | ENE 7 | SSW 8 | — | — | ENE 9 | S 15 | S 13 | ENE 8 | NE 8 | — | ENE 7 | ENE 7 | NE 7 |
| kJ | 8 | 8 | 6 | 2 | 1 | 24 | 106 | 6 | 40 | 19 | — | — | 86 | 17 | 163 | 26 | 16 | — | 5 | 5 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | E 14 | SE 12 | S 7 | S 10 | SE 12 | — | SSW 8 | SSW 4 | — | — | — | S 12 | ENE 9 | — | — | — | — | — | — |
| kJ | — | — | 4 | 6 | 1 | 19 | 6 | — | 22 | 1 | — | — | — | 3 | 50 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 8 | N 5 | SW 3 | SSW 3 | SSW 3 | NE 2 | — | ENE 7 | N 4 | SW 4 | SSW 7 | S 9 | S 8 | S 8 | — | — | S 11 | S 12 | — | — | — |
| kJ | 555 | 45 | 1 | 2 | 2 | 1 | — | 183 | 21 | 2 | 259 | 732 | 589 | 372 | — | — | 819 | 1738 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 2 | 0 | 0 | 11 | 6 | 4 | 2 | 0 | 0 | 111 | 2 | 2 | 24 | 0 | 0 | 2 | 0 | 2 | 2 | 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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