Surf Forecasts:
Siriu surf forecast from 24 Jul 2026:
- Best quality surf: Friday 24 Jul, 3AM (local time) - 6ft (1.8m), 9s period, SSE swell with cross-offshore winds.
- Most powerful swell: Friday 31 Jul, 12AM (local time) - 5.5ft (1.7m), 11s period, SSE swell with 668 kJ wave energy.
- Next surfable swell (1★+): Friday 24 Jul, 3AM (local time) - 6ft (1.8m), 9s period with SSE 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 Friday (Jul 24) at 3AM. The primary swell is predicted to be 1.8m and 9s period with a secondary swell of 0.6m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Siriu in the next 16 days are 1.7m 11s and forecast to arrive on Friday (Jul 31) at 12AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 24th Jul) | 6ft (1.8m) 9s |
| Best Surf | 3AM (Fri 24th Jul) | 6ft (1.8m) 9s |
| Most Powerful | 12AM (Fri 31st Jul) | 5.5ft (1.7m) 11s |
Table - best surf conditions forecast for Siriu over the next 16 days.
The Lowdown
Alright crew, Rusty here with the lowdown on Siriu for the next couple of weeks.
It’s a bit of a slow burner. You’ve got some average days early, then a bit of a pulse late in the first week, and then a few more options in the second week. The water temp is about normal for this time of year.
The one to get the alarm set for is Friday morning, July 24th. We’ve got a glassy 6ft swell from the southeast with a 9-second period and a solid 597 combined energy (moderate). The wind is glassy from the southwest, so it’s going to be clean. That’s a fun wave, but that 6ft is a bit much for the groms. Expect some company at the break.
Another good window is Thursday afternoon, July 30th. There’s a clean 3ft swell from the south-southeast, but the period is a nice 13 seconds, giving it some real punch. The energy is moderate (504) and the cross-off wind from the south-southwest will keep the lines clean. A solid pick for a mid-week session.
If you’re looking further out, Saturday afternoon, August 1st, is a bit of a long-range hope. The swell jumps to 6ft from the northeast, but it’s a short 7-second period (windswell). The wind is a clean cross-off from the south-southwest, and the energy is 600 (moderate). It could be fun, but that short period might make it a bit of a messy peak, and it’s over a week away, so stay tuned.
The rest of the days are mostly small, onshore junk. There’s a long stretch of poor conditions from the 2nd of August onwards, with the wind being the main problem. The 3rd of August morning has glassy conditions on a 3ft south swell, but it’s nothing special.
So, the winners are the 24th of July morning and the 30th of July afternoon. The rest is pretty forgettable.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sun morning. Warm (max 21°C on Sun afternoon, min 15°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Mon night. Warm (max 23°C on Tue morning, min 18°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | ||||||||||||||
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) | SSE 8 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SSE 13 | SSE 12 | S 12 | ESE 8 | S 12 | S 12 | SSE 11 | S 12 | S 12 | S 11 | S 10 | S 10 | ENE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 404 | 528 | 418 | 297 | 300 | 281 | 229 | 150 | 98 | 75 | 77 | 70 | 42 | 75 | 98 | 84 | 75 | 69 | 63 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-on | cross-off | cross | cross-on | cross | cross | cross | cross-off | glassy | cross-on | cross | cross | cross | cross | glassy | glassy | cross-off |
High Tide | 12:44PM0.60m | 10:32PM0.46m | 1:06PM0.65m | 11:42PM0.51m | 1:28PM0.70m | 00:20AM0.56m | 1:51PM0.73m | 00:51AM0.62m | 2:14PM0.74m | 1:20AM0.68m | 2:36PM0.75m | 1:49AM0.73m | |||||||
Low Tide | 4:31AM0.24m | 6:10PM0.40m | 5:33AM0.18m | 6:55PM0.36m | 6:23AM0.12m | 7:27PM0.33m | 7:04AM0.07m | 7:55PM0.31m | 7:42AM0.02m | 8:22PM0.30m | 8:17AM-0.01m | 8:48PM0.30m | |||||||
 |  |  |  | | | |  |  | | | |  | | | | | |  | |
 | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — |
 | — | — | 5:39 | — | — | 5:40 | — | — | 5:40 | — | — | 5:42 | — | — | 5:43 | — | — | 5:43 | — |
mm | — | — | — | — | — | — | — | 2 | 2 | — | — | — | 5 | — | — | 1 | 2 | 2 | — |
Temp °C | 15 | 18 | 18 | 16 | 19 | 20 | 16 | 18 | 21 | 19 | 21 | 21 | 18 | 23 | 23 | 20 | 21 | 19 | 18 |
Feels °C | 13 | 18 | 18 | 16 | 18 | 18 | 15 | 18 | 21 | 21 | 22 | 20 | 18 | 24 | 24 | 21 | 22 | 21 | 17 |
Swell 1 Height (m) Direction Period (s) | SSE 8 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | NE 5 | NE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 |
| kJ | 404 | 528 | 418 | 297 | 300 | 281 | 211 | 140 | 84 | 75 | 56 | 55 | 36 | 31 | 33 | 37 | 35 | 36 | 63 |
Swell 2 Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | SSE 13 | SSE 13 | SSE 12 | S 12 | NE 5 | S 12 | S 12 | ENE 7 | ESE 8 | S 12 | S 11 | S 10 | S 10 | ESE 6 |
| kJ | 54 | 51 | 35 | 33 | 33 | 125 | 229 | 150 | 98 | 19 | 77 | 70 | 18 | 37 | 98 | 84 | 75 | 69 | 30 |
Swell 3 Height (m) Direction Period (s) | — | S 10 | S 10 | S 10 | S 10 | E 8 | ENE 8 | ENE 8 | ENE 8 | S 11 | NE 5 | NE 5 | SSE 11 | S 12 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | S 6 |
| kJ | — | 18 | 18 | 45 | 48 | 29 | 32 | 20 | 19 | 62 | 8 | 5 | 42 | 75 | 37 | 37 | 26 | 29 | 23 |
Wind waves Height (m) Direction Period (s) | SSW 8 | — | — | — | — | — | N 3 | N 3 | NNE 5 | NNE 5 | — | NE 5 | NE 5 | NE 5 | NE 6 | — | — | SSE 4 | — |
| kJ | 211 | — | — | — | — | — | 2 | 5 | 19 | 32 | — | 7 | 10 | 49 | 59 | — | — | 11 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 15 | 0 | 6 | 16 | 9 | 27 | 6 | 0 | 0 | 27 | 9 | 18 | 10 | 9 | 0 | 0 | 0 |
Best forecast wave conditions in Santa Catarina - Sul | |||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||
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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.
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