Surf Forecasts:
Ilha surf forecast from 20 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 6AM (local time) - 5ft (1.5m), 14s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 6PM (local time) - 6.5ft (2.0m), 16s period, SSE swell with 1,889 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 6AM (local time) - 5ft (1.5m), 14s period with S swell.
Best Forecast Surf Conditions for Ilha this week:
The surf forecast for Ilha over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 25) at 6AM. The primary swell is predicted to be 1.5m and 14s period with a secondary swell of 0.6m and 5s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Ilha in the next 16 days are 2.0m 16s and forecast to arrive on Monday (Aug 24) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 25th Aug) | 5ft (1.5m) 14s |
| Best Surf | 6AM (Tue 25th Aug) | 5ft (1.5m) 14s |
| Most Powerful | 6PM (Mon 24th Aug) | 6.5ft (2.0m) 16s |
Table - best surf conditions forecast for Ilha over the next 16 days.
The Lowdown
Hey folks, Rusty here, checking in on the local surf scene. We've got a mixed bag ahead, but there are definitely some windows to get wet.
The water temperature is sitting at 70°F, which is a touch warmer than normal for this time of year, so you might not need the thickest rubber.
The start of the period is pretty grim. Thursday morning kicks off with tiny, weak 1.0ft surf from the ESE at 7 seconds, with a weak energy reading of 20. It's a no-go. That theme continues through Friday and Saturday, with poor conditions and onshore winds keeping things messy. We finally see a glimmer on Sunday the 23rd morning, but it's only 4ft with light cross-onshore winds and a marginal score – not worth rushing out for.
The real standout is shaping up for Tuesday, August 25th. The morning session at Ilha is looking like the pick of the entire forecast. We've got a clean 5ft groundswell from the south with a nice 14-second period, combining for a solid moderate energy of 953. The wind is dead glassy, NNW at 3 mph, which means conditions will be clean and smooth. This is top-tier stuff for a Tuesday morning session.
Wednesday the 26th morning also has potential with glassy conditions and a 3ft south swell, though the period is a bit shorter at 13 seconds. The energy (724) is still good. Thursday morning the 27th is another clean morning with 4ft SSE swell, 14-second period, and glassy conditions.
After that, the surf drops off again into the first week of September. We get a bit of a spike on Thursday, September 3rd, with a 8ft south swell, but that's accompanied by onshore winds and poor conditions – that's one for experts only, and even then, it won't be pretty. The trend turns more promising again on Friday, September 4th, with a solid 5ft south swell at 12 seconds, clean offshore winds, and a good energy rating of 710. That's another morning worth marking on the calendar, though it's a long way out.
So, to sum it up: the next few days are a write-off, but next Tuesday morning (25th) is the clear winner. The following Thursday morning (27th) and the Friday morning of the 4th of September are also worth keeping an eye on.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sat night. Warm (max 27°C on Thu night, min 18°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 20mm), heaviest during Sun night. Very mild (max 19°C on Sun morning, min 17°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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) | ESE 7 | S 11 | S 10 | S 9 | S 6 | S 6 | S 10 | S 10 | S 10 | SSE 10 | S 10 | S 13 | SSE 14 | SSE 14 | SSE 15 | S 14 | SSE 14 | SSE 13 | S 13 | SSE 16 | SSE 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 10 | 17 | 40 | 143 | 63 | 302 | 360 | 240 | 240 | 194 | 404 | 1340 | 1270 | 1560 | 938 | 754 | 515 | 334 | 357 | 633 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | glassy | cross-on | glassy | glassy | on | glassy |
High Tide | 6:13PM0.81m | 8:17AM0.73m | 12:59PM0.78m | 7:09PM0.72m | 1:10PM0.89m | 00:24AM0.73m | 1:28PM0.99m | 00:51AM0.86m | 1:47PM1.08m | 1:13AM0.98m | 2:06PM1.15m | 1:35AM1.10m | 2:24PM1.21m | 1:59AM1.20m | |||||||
Low Tide | 11:01AM0.66m | 2:35AM0.48m | 9:43AM0.73m | 4:48PM0.69m | 4:46AM0.44m | 6:15PM0.60m | 5:58AM0.33m | 6:54PM0.50m | 6:47AM0.21m | 7:25PM0.41m | 7:26AM0.10m | 7:54PM0.33m | 8:01AM0.01m | 8:23PM0.27m | |||||||
 |  |  |  | | | | |  | |  |  | | |  | | |  | | |  | |
 | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — |
 | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | — | 5:51 | — |
mm | — | — | — | — | — | — | — | — | 1 | — | 2 | 8 | 3 | 1 | 4 | 1 | 1 | — | — | — | — |
Temp °C | 21 | 21 | 27 | 21 | 20 | 20 | 18 | 19 | 19 | 19 | 18 | 18 | 17 | 17 | 18 | 18 | 18 | 18 | 19 | 19 | 19 |
Feels °C | 22 | 23 | 25 | 19 | 19 | 19 | 17 | 18 | 17 | 19 | 16 | 17 | 14 | 15 | 16 | 19 | 19 | 19 | 20 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 7 | E 7 | S 6 | S 6 | S 10 | S 10 | S 10 | SSE 10 | S 10 | S 13 | SSE 14 | SSE 14 | SSE 15 | S 14 | SSE 14 | SSE 13 | S 13 | S 13 | SSE 14 |
| kJ | 10 | 10 | 16 | 22 | 97 | 63 | 302 | 360 | 240 | 240 | 194 | 404 | 1340 | 1270 | 1560 | 938 | 754 | 515 | 334 | 329 | 633 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SSW 5 | S 10 | — | ESE 8 | ESE 8 | ESE 8 | E 7 | E 7 | — | E 7 | — | — | SSE 18 | — | — | — | ESE 5 | SSE 16 | SSE 16 | ESE 6 |
| kJ | 6 | 2 | 17 | — | 32 | 12 | 6 | 4 | 1 | — | 4 | — | — | 254 | — | — | — | 17 | 298 | 357 | 71 |
Swell 3 Height (m) Direction Period (s) | S 9 | S 11 | SSW 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 5 | — | — |
| kJ | 2 | 10 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 23 | — | — |
Wind waves Height (m) Direction Period (s) | SW 4 | — | E 4 | S 9 | S 6 | — | — | — | — | E 4 | ESE 4 | SE 4 | ESE 5 | E 5 | — | E 5 | E 5 | E 5 | ESE 6 | ESE 6 | ESE 6 |
| kJ | 2 | — | 8 | 40 | 143 | — | — | — | — | 7 | 9 | 19 | 30 | 10 | — | 15 | 15 | 22 | 69 | 43 | 112 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 63 | 5 | 129 | 390 | 5 | 42 | 8 | 2 | 2 | 57 | 57 | 57 | 2 | 15 | 0 | 58 | 0 | 0 | 30 | 0 |
Best forecast wave conditions in São Paulo | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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Information about the Ilha Surf forecast
The above surf forecast table for Ilha provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ilha can be found by selecting the local surf guide option on the grey menu. Our Ilha 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 (Ilha) 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 Ilha 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.
Are you planning a holiday in São Paulo? If you are looking for accommodation near Ilha, camping, hotels and holiday cottages in São Paulo, consider staying in Praia Grande which is 19 km (12 miles) away. Other places in and around São Paulo where you can find information about places to rent, and car hire include Bertioga which is 19 km (12 miles) away, Guaruja, Cubatao and Santos.
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