
Surf Forecasts:
Siriu surf forecast from 11 Jul 2026:
- Best quality surf: Monday 13 Jul, 3AM (local time) - 7ft (2.1m), 8s period, S swell with cross-offshore winds.
- Most powerful swell: Tuesday 14 Jul, 3PM (local time) - 7ft (2.1m), 10s period, SE swell with 936 kJ wave energy.
- Next surfable swell (1★+): Saturday 11 Jul, 6PM (local time) - 4.5ft (1.3m), 13s period with ESE swell.
Best Forecast Surf Conditions for Siriu this week:
The surf forecast for Siriu over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jul 11) at 6PM. The primary swell is predicted to be 1.3m and 13s period with a secondary swell of 0.4m and 4s. Another secondary swell of 0.6m and 4s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Siriu in the next 16 days are 2.1m 10s and forecast to arrive on Tuesday (Jul 14) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Sunday (Jul 12) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sat 11th Jul) | 4.5ft (1.3m) 13s |
| Best Surf | 3AM (Mon 13th Jul) | 7ft (2.1m) 8s |
| Most Powerful | 3PM (Tue 14th Jul) | 7ft (2.1m) 10s |
Table - best surf conditions forecast for Siriu over the next 16 days.
Alright folks, Rusty here. Let’s have a look at what’s on the cards for the Siriu area over the next couple of weeks.
First up, we have a bit of a slow start, but the good news is that the waiting game pays off. The first real session to get excited about kicks off on Sunday, 12 July in the morning. The swell is showing a solid 5ft from the South with a clean cross-offshore breeze from the Southwest. The water is much colder than normal for this time of year, sitting at 60°, so you’ll want a decent wetsuit – that’s a 6° anomaly, which is very unusual and will feel proper chilly. The energy is solid (979) and the waves are clean. This is a highlight for the week.
Then Monday, 13 July morning keeps the fun going with a similar setup: 6ft of South swell, a clean cross-offshore wind, and good energy (858). The period is short at 8 seconds, so it’s a bit of a wind swell, but the conditions are making the most of it.
The standout moment, though, is Tuesday, 14 July morning. The wind turns glassy – flat calm from the Northwest – and that’s a massive win for clean surf. The swell is 6ft from the Southeast with a 10-second period, which gives it a bit more push and shape. The energy is pumping (851). This is the best condition on offer for the near future, with that glassy surface making waves a dream to surf. Expect the crowd to be around sometimes, so it’s worth getting out early.
Things get a bit messy after that. The winds pick up, and the swell becomes less consistent and more crossed up. Thursday, 16 July and Friday, 17 July are poor, with strong North winds and lumpy, choppy conditions. The swell drops, and the forecast is flat for those days.
There’s a small window again on Saturday, 18 July morning, with 6ft from the Northeast, but the wind is cross-shore and the quality is marginal. The period is short (8 seconds), so it’s not the best shaped wave.
The second week sees a lot of small, weak swell and onshore winds. Sunday, 26 July afternoon brings a bigger pulse: 8ft from the South with a 9-second period and a clean cross-offshore breeze (1179 energy). That’s a strong combo, but the swell is over 7ft, so it’s heading into expert territory. The wind is fresh at 18 mph, but it’s clean, so the waves will be powerful and lined up. This is a promising long-range call, but less certain this far out.
Overall, the standout is Tuesday, 14 July morning for the glassy conditions and solid Southeast swell. The Sunday, 12 July and Monday, 13 July mornings are also solid, clean options. If you’re an experienced surfer, the Sunday, 26 July afternoon is worth watching, but it’s a long way off.
Stay keen, and get on it while it’s clean.
Rusty
Short Range ForecastLight rain (total 8mm), mostly falling on Sat afternoon. Very mild (max 18°C on Sat afternoon, min 12°C on Sun night). Winds increasing (calm on Sat afternoon, fresh winds from the SSW by Sun afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Fri morning, min 14°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||
Sat 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | ESE 13 | ESE 13 | S 11 | S 7 | S 8 | S 8 | S 8 | ESE 11 | SE 10 | SE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 11 | ESE 12 | ESE 12 | ESE 12 | ESE 12 | ESE 11 | NE 8 | NE 8 |
Wave Graph | |||||||||||||||||||||
520 | 476 | 432 | 348 | 632 | 432 | 354 | 329 | 676 | 936 | 785 | 641 | 445 | 522 | 579 | 608 | 501 | 322 | 243 | 414 | 445 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | off | glassy | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross |
High Tide | 00:40AM0.48m | 2:18PM0.81m | 00:49AM0.50m | 3:00PM0.82m | 1:07AM0.55m | 3:36PM0.78m | 1:33AM0.61m | 3:55PM0.72m | 2:04AM0.67m | 4:01PM0.65m | 2:38AM0.72m | 4:11PM0.60m | 3:15AM0.73m | ||||||||
Low Tide | 7:35PM0.26m | 7:01AM0.06m | 8:25PM0.29m | 7:48AM0.00m | 9:05PM0.33m | 8:33AM-0.04m | 9:39PM0.39m | 9:15AM-0.05m | 10:07PM0.43m | 9:56AM-0.02m | 10:30PM0.46m | 10:35AM0.03m | 10:48PM0.45m | 11:12AM0.11m | |||||||
— | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | |
5:34 | — | — | 5:34 | — | — | 5:35 | — | — | 5:35 | — | — | 5:36 | — | — | 5:36 | — | — | 5:37 | — | 5:37 | |
mm | 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 17 | 18 | 17 | 15 | 15 | 16 | 14 | 18 | 18 | 16 | 18 | 19 | 14 | 20 | 21 | 17 | 24 | 23 | 20 | 26 |
Feels °C | 18 | 17 | 13 | 12 | 11 | 11 | 12 | 11 | 16 | 15 | 14 | 14 | 14 | 10 | 15 | 17 | 13 | 22 | 21 | 18 | 23 |
Swell 1 Height (m) Direction Period (s) | ESE 13 | ESE 13 | ESE 12 | ESE 12 | S 8 | S 8 | SSE 8 | SSE 10 | SE 10 | SE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 11 | ESE 12 | ESE 12 | ESE 12 | ESE 12 | ESE 11 | ENE 8 | ENE 8 |
520 | 476 | 320 | 309 | 397 | 272 | 235 | 253 | 676 | 936 | 785 | 641 | 445 | 522 | 579 | 608 | 501 | 322 | 243 | 236 | 264 | |
Swell 2 Height (m) Direction Period (s) | S 5 | SSE 7 | SSE 9 | SSE 18 | ESE 12 | SE 11 | ESE 11 | ESE 11 | ESE 12 | S 11 | S 11 | S 10 | S 10 | S 13 | S 13 | S 12 | S 13 | S 18 | S 12 | ESE 11 | ESE 10 |
5 | 104 | 189 | 31 | 184 | 133 | 207 | 329 | 172 | 10 | 9 | 8 | 7 | 3 | 3 | 3 | 3 | 6 | 3 | 130 | 58 | |
Swell 3 Height (m) Direction Period (s) | S 5 | NE 4 | SE 6 | SSE 18 | SSE 16 | SSE 15 | SSE 13 | SSE 13 | NE 8 | NE 8 | S 11 | E 8 | S 14 | — | — | — | — | S 18 | SE 17 | S 11 | S 10 |
5 | 2 | 38 | 61 | 25 | 21 | 35 | 34 | 3 | 2 | 20 | 1 | 4 | — | — | — | — | 6 | 11 | 9 | 8 | |
Wind waves Height (m) Direction Period (s) | NNE 4 | — | S 11 | S 7 | S 8 | S 8 | S 8 | — | — | — | NE 4 | NNE 4 | NNE 5 | NNE 5 | NE 6 | NE 6 | NE 6 | NE 7 | NE 7 | NE 8 | NE 8 |
8 | — | 432 | 348 | 632 | 432 | 354 | — | — | — | 26 | 50 | 46 | 45 | 59 | 114 | 150 | 158 | 211 | 414 | 445 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 6 | 0 | 0 | 65 | 13 | 0 | 15 | 0 | 0 | 16 | 9 | 49 | 109 | 49 | 49 | 101 | 27 | 27 | 16 | 33 | 9 |
Best forecast wave conditions in Santa Catarina - Sul | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Information about the Siriu Surf forecast
The above surf forecast table for Siriu provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Siriu can be found by selecting the local surf guide option on the grey menu. Our Siriu 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 (Siriu) 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 Siriu 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.
Siriu is 27 km (17 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.











