Surf Forecasts:
Ilha surf forecast from 18 Jul 2026:
- Best quality surf: Saturday 18 Jul, 9PM (local time) - 3.5ft (1.1m), 8s period, E swell with cross-offshore winds.
- Most powerful swell: Friday 24 Jul, 6AM (local time) - 4ft (1.2m), 8s period, SSE swell with 197 kJ wave energy.
- Next surfable swell (1★+): Saturday 18 Jul, 9AM (local time) - 2.5ft (0.8m), 9s period with ESE 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 Saturday (Jul 18) at 9AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.1m and 15s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Ilha in the next 16 days are 1.2m 8s and forecast to arrive on Friday (Jul 24) at 6AM. Winds are predicted to be 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 Tuesday (Jul 21) at 9AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sat 18th Jul) | 2.5ft (0.8m) 9s |
| Best Surf | 9PM (Sat 18th Jul) | 3.5ft (1.1m) 8s |
| Most Powerful | 6AM (Fri 24th Jul) | 4ft (1.2m) 8s |
Table - best surf conditions forecast for Ilha over the next 16 days.
The Lowdown
Alright folks, Rusty here, lookin’ at the charts for Ilha.
To be straight with you, the next couple of weeks here are looking pretty grim. We’ve got a long stretch of small, weak surf and sketchy winds. We’re staring down the barrel of about a week where the surf is just not worth paddling out for. The real standout is a ways off, and it’s a bit of a gamble, but it’s the only thing on the menu that has any real flavor.
The first real window of opportunity, and it’s a slim one, is on Saturday, July 26th, but the waves are tiny at 3ft from the ESE, and the wind is already cross-on. It’s a no-go. The entire week from Saturday the 19th through to Friday the 25th is a write-off. We’re seeing mostly 1ft to 2ft slop with poor conditions. The combined wave energy is barely a whisper in the 30-60 range. It’s flat.
We do get a little bump on Saturday, July 26th, with the swell jumping to 4ft from the SE, and the energy kicking up to 330. That’s a moderate pulse, but it’s short-period (7 seconds) and the wind is cross-off, not clean. It’s a “marginal” call at best, definitely not a standout.
The real one to circle on your calendar is Saturday, August 1st in the morning. That’s the only true standout in the whole 16-day window. We’ve got a clean 3ft swell from the SSE, but the real magic is the wind. This is glassy. The water is a mild 67°, which is about average for this time of year, nothing weird. The combined energy is 212, which is a solid moderate pulse. The period is 9 seconds, so it’ll have a little bit of shape. For a reef break like Ilha (and we’re talking about the exposed SE exposure here), this is your best bet. The swell direction is on the money for the optimum. Don’t get too excited about the afternoon, though. The wind shifts to a cross-on from the SE, and the swell drops.
The final morning on Sunday, August 2nd is worth a mention, too. Another glassy start with 3ft from the SE and 171 energy. It’s clean, but the energy is a touch lower than the day before. It’s a decent consolation prize if you miss the Saturday session.
So, the short story is: the next 10 days are a desert. The one real oasis is the morning of Saturday, August 1st at Ilha. It’s the only session that looks like it’s worth the wettie. The long-range call is a bit of a gamble, but it’s the only game in town.
Rusty.
Short Range ForecastMostly dry. Warm (max 30°C on Mon morning, min 20°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Thu night. Warm (max 33°C on Tue afternoon, min 18°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 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) | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | S 10 | ESE 8 | ESE 8 | S 8 | S 8 | S 8 | SSE 8 | SSE 8 | SSE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 106 | 68 | 21 | 61 | 107 | 24 | 53 | 50 | 24 | 34 | 36 | 35 | 17 | 22 | 28 | 22 | 22 | 49 | 167 | 176 | 110 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross-off | off | cross | cross-off | cross-off | cross | cross-off | off | cross-off | cross-off | cross-off | cross | cross-off | cross | glassy | cross | on | cross | cross |
High Tide | 5:16PM1.01m | 5:05AM1.15m | 5:43PM0.96m | 5:45AM1.06m | 6:13PM0.91m | 6:31AM0.96m | 6:46PM0.85m | 7:32AM0.85m | 7:32PM0.79m | 9:48AM0.78m | 8:54PM0.74m | 12:53PM0.88m | 11:46PM0.76m | ||||||||
Low Tide | 11:33AM0.17m | 11:21PM0.48m | 12:05PM0.28m | 11:43PM0.47m | 12:39PM0.41m | 00:24AM0.47m | 1:31PM0.52m | 1:50AM0.49m | 3:06PM0.60m | 3:37AM0.47m | 4:52PM0.62m | 5:04AM0.41m | 6:14PM0.57m | ||||||||
 | |  | | | | | | | | | |  | |  | |  |  | |  |  | |
 | 6:46 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:43 | — | — |
 | — | 5:35 | — | — | 5:36 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 13 | 9 | 5 | 1 |
Temp °C | 26 | 26 | 25 | 27 | 27 | 26 | 30 | 30 | 27 | 32 | 33 | 28 | 27 | 20 | 20 | 21 | 21 | 19 | 18 | 19 | 19 |
Feels °C | 24 | 23 | 24 | 24 | 23 | 24 | 27 | 27 | 25 | 30 | 32 | 26 | 25 | 19 | 22 | 22 | 23 | 20 | 18 | 19 | 17 |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | E 4 | ESE 8 | ESE 8 | E 5 | ESE 8 | ESE 8 | E 5 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | S 5 | SSE 5 | S 8 | SSE 8 | SSE 8 | SSE 8 |
| kJ | 106 | 68 | 10 | 61 | 51 | 11 | 53 | 50 | 12 | 34 | 36 | 35 | 12 | 22 | 28 | 18 | 17 | 49 | 167 | 176 | 110 |
Swell 2 Height (m) Direction Period (s) | S 15 | S 14 | ESE 8 | S 15 | S 15 | ESE 8 | S 12 | S 12 | ESE 8 | S 11 | S 11 | S 11 | NNW 3 | S 9 | S 9 | S 8 | S 8 | ESE 8 | ESE 8 | SE 8 | S 11 |
| kJ | 4 | 4 | 21 | 5 | 17 | 24 | 3 | 3 | 24 | 2 | 2 | 2 | 2 | 15 | 13 | 22 | 22 | 14 | 6 | 2 | 9 |
Swell 3 Height (m) Direction Period (s) | S 11 | S 11 | SE 10 | S 12 | — | S 13 | S 15 | S 15 | S 12 | — | — | — | S 10 | E 5 | SSW 5 | ESE 8 | ESE 8 | — | S 13 | S 12 | — |
| kJ | 3 | 2 | 15 | 3 | — | 14 | 4 | 4 | 3 | — | — | — | 17 | 2 | 5 | 22 | 13 | — | 4 | 3 | — |
Wind waves Height (m) Direction Period (s) | N 3 | ESE 8 | — | N 3 | ESE 8 | — | — | ENE 2 | N 2 | NNW 3 | — | — | SW 3 | SW 4 | — | — | — | SSE 5 | — | — | E 5 |
| kJ | 1 | 60 | — | 1 | 107 | — | — | 1 | 1 | 3 | — | — | 2 | 7 | — | — | — | 33 | — | — | 27 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 2 | 5 | 0 | 8 | 5 | 0 | 3 | 21 | 31 | 21 | 21 | 31 | 96 | 5 | 3 | 0 | 14 | 8 | 8 | 8 |
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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