Surf Forecasts:
Siriu surf forecast from 26 Sep 2026:
- Best quality surf: Thursday 1 Oct, 12AM (local time) - 4.5ft (1.3m), 9s period, E swell with cross-offshore winds.
- Most powerful swell: Friday 2 Oct, 3AM (local time) - 5ft (1.6m), 12s period, S swell with 759 kJ wave energy.
- Next surfable swell (1★+): Saturday 26 Sep, 6PM (local time) - 2.5ft (0.8m), 7s period with ENE 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 (Sep 26) at 6PM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.3m and 10s. 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 1.6m 12s and forecast to arrive on Friday (Oct 02) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 5s period and expected on Tuesday (Sep 29) at 3PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sat 26th Sep) | 2.5ft (0.8m) 7s |
| Best Surf | 12AM (Thu 1st Oct) | 4.5ft (1.3m) 9s |
| Most Powerful | 3AM (Fri 2nd Oct) | 5ft (1.6m) 12s |
Table - best surf conditions forecast for Siriu over the next 16 days.
Short Range ForecastModerate rain (total 14mm), heaviest on Mon morning. Warm (max 24°C on Sat morning, min 18°C on Sat night). Winds increasing (calm on Sun morning, fresh winds from the NNE by Mon night). | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Tue afternoon. Warm (max 21°C on Tue morning, min 15°C on Wed afternoon). Wind will be generally light. | ||||||||||||||||||||
Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | Wednesday 30 | Thursday 1 | Friday 2 | |||||||||||||||
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) | ENE 6 | ENE 6 | ENE 7 | ENE 7 | SSE 11 | S 10 | S 9 | E 6 | E 6 | E 6 | ENE 7 | ENE 8 | E 8 | E 8 | E 9 | S 8 | S 9 | S 12 | S 12 | S 11 | SSE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 45 | 56 | 48 | 36 | 40 | 123 | 62 | 57 | 84 | 83 | 195 | 266 | 343 | 324 | 275 | 251 | 241 | 702 | 604 | 533 | 435 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | glassy | on | cross-off | cross | cross-off | cross-off | cross | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | cross-off | cross-on | cross-on |
High Tide | 1:59PM0.75m | 1:46AM0.83m | 2:17PM0.71m | 2:19AM0.82m | 2:36PM0.66m | 2:55AM0.79m | 2:56PM0.61m | 3:35AM0.73m | 3:15PM0.56m | 4:20AM0.65m | 3:31PM0.52m | 5:19AM0.56m | 11:26PM0.29m | ||||||||
Low Tide | 8:16PM0.18m | 8:44AM0.04m | 8:44PM0.17m | 9:25AM0.12m | 9:10PM0.18m | 10:12AM0.24m | 9:27PM0.19m | 11:15AM0.36m | 8:37PM0.20m | 8:08AM0.51m | 12:48PM0.46m | 8:28PM0.20m | 7:31AM0.52m | 8:40PM0.23m | |||||||
 | |  |  | |  |  |  |  | | | | | | | | | |  | |  | |
 | 5:58 | — | — | 5:58 | — | — | 5:56 | — | — | 5:56 | — | — | 5:54 | — | — | 5:54 | — | — | 5:52 | — | — |
 | — | 6:12 | — | — | 6:12 | — | — | 6:13 | — | — | 6:13 | — | — | 6:14 | — | — | 6:14 | — | — | 6:15 | — |
mm | — | — | — | — | — | 2 | 5 | 6 | 1 | 1 | 5 | 1 | — | 2 | 4 | — | — | — | — | — | — |
Temp °C | 24 | 24 | 20 | 21 | 21 | 19 | 20 | 21 | 20 | 21 | 20 | 21 | 21 | 16 | 15 | 16 | 16 | 16 | 17 | 16 | 16 |
Feels °C | 24 | 25 | 20 | 22 | 22 | 20 | 19 | 23 | 20 | 19 | 21 | 25 | 22 | 13 | 13 | 17 | 16 | 15 | 16 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 6 | S 10 | E 6 | E 6 | E 6 | E 6 | ENE 7 | ENE 8 | E 8 | E 8 | E 9 | E 9 | S 9 | S 12 | S 12 | S 11 | SSE 10 |
| kJ | 40 | 56 | 48 | 36 | 16 | 123 | 41 | 57 | 84 | 83 | 195 | 266 | 343 | 324 | 275 | 230 | 241 | 702 | 604 | 533 | 435 |
Swell 2 Height (m) Direction Period (s) | SSE 11 | SSE 10 | SSE 10 | S 5 | SSE 11 | E 6 | S 9 | S 9 | S 8 | SSE 8 | SSE 12 | SSE 11 | SSE 10 | S 10 | S 7 | S 8 | E 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 45 | 34 | 19 | 2 | 40 | 30 | 62 | 26 | 23 | 13 | 47 | 40 | 20 | 17 | 154 | 152 | 194 | 99 | 72 | 53 | 37 |
Swell 3 Height (m) Direction Period (s) | E 11 | E 11 | E 11 | SSE 9 | SSE 5 | SE 5 | E 9 | SSE 12 | SSE 11 | S 11 | SSE 8 | — | — | — | ESE 12 | SE 10 | SE 10 | SE 11 | SE 10 | SE 10 | SE 12 |
| kJ | 10 | 9 | 2 | 8 | 9 | 12 | 2 | 26 | 22 | 9 | 7 | — | — | — | 13 | 17 | 26 | 30 | 26 | 25 | 21 |
Wind waves Height (m) Direction Period (s) | — | — | SSW 2 | — | — | NE 6 | NNE 2 | N 3 | — | NNE 4 | N 5 | — | SSW 3 | S 4 | S 7 | S 8 | — | — | — | — | — |
| kJ | — | — | 1 | — | — | 14 | 1 | 3 | — | 17 | 11 | — | 1 | 15 | 208 | 251 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 25 | 0 | 0 | 555 | 0 | 27 | 0 | 39 | 16 | 16 | 49 | 0 | 25 | 0 | 0 | 9 | 0 | 0 | 27 | 9 |
Best forecast wave conditions in Santa Catarina - Sul | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Siriu surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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