Surf Forecasts:
Ilha surf forecast from 21 Jul 2026:
- Best quality surf: Friday 24 Jul, 9AM (local time) - 3.5ft (1.1m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 27 Jul, 12AM (local time) - 4ft (1.2m), 9s period, S swell with 246 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 3PM (local time) - 2ft (0.6m), 8s 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 Tuesday (Jul 21) at 3PM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.1m and 11s. 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 1.2m 9s and forecast to arrive on Monday (Jul 27) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 2s period and expected on Saturday (Jul 25) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Tue 21st Jul) | 2ft (0.6m) 8s |
| Best Surf | 9AM (Fri 24th Jul) | 3.5ft (1.1m) 10s |
| Most Powerful | 12AM (Mon 27th Jul) | 4ft (1.2m) 9s |
Table - best surf conditions forecast for Ilha over the next 16 days.
The Lowdown
Alright folks, Rusty here.
The next 16 days are looking pretty ordinary for the most part, with only a couple of windows that’ll get the blood pumping. We’ve got a long stretch of tiny, weak surf ahead, so patience is the name of the game.
The first run of any real interest kicks off on Friday, July 24th. We’re looking at Ilha (reef) with a clean 4ft swell from the S, with a 10-second period. The combined energy is moderate (232), and with light cross-offshore winds in the morning, it’ll be the pick of the early period. The water temp is sitting at 68°, which is spot on average for this time of year.
That Friday morning is the standout for the first week. The swell drops off quickly after that, and we slide into a real quiet spell. From Saturday the 25th all the way through to the end of the month, we’re looking at tiny waves—mostly 1.0ft to 2ft—with weak energy readings (often below 100). Winds are mixed, but even when it’s glassy, there just isn’t enough swell to get excited about. A few days have periods over 14 seconds, but with barely any height, it’s just a long wait for a bump.
Now, after a long, flat run, things start to look a little more promising again in the first week of August. Wednesday, August 5th is the real standout of the whole outlook. The morning brings a glassy 2ft swell from the S, but that period is a very long 15 seconds. The energy is moderate (213) and the conditions are clean as a whistle. This is a solid groundswell, and while it’s not huge, at a reef break like Ilha, that long period will deliver some proper, shaped-up waves. The afternoon builds a bit more energy (334) but the wind turns slightly cross-on, so the morning is the window.
The period before that—Sunday, August 3rd and Monday, August 4th—is pretty much a write-off with moderate winds and poor surf quality. Don’t bother.
So, your best bet is the morning of Friday, July 24th for a clean, fun-sized wave, and the absolute standout is the morning of Wednesday, August 5th for that glassy, long-period groundswell. It’s a long way out, so keep an eye on the charts, but it’s got promise.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Thu night. Warm (max 32°C on Wed morning, min 18°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 20mm), heaviest during Fri morning. Warm (max 23°C on Sat afternoon, min 17°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||
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 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | S 10 | S 9 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | S 14 | S 13 | S 9 | S 8 | SE 9 | S 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 34 | 50 | 35 | 36 | 38 | 43 | 24 | 22 | 20 | 220 | 180 | 188 | 158 | 158 | 145 | 144 | 161 | 246 | 82 | 50 | 49 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | cross-off | glassy | cross | cross-off | cross-on | cross-off | cross-off | glassy | cross-off | cross-off | on | cross-on | cross | cross-on | cross-off | cross-off | cross-on | glassy |
High Tide | 6:46PM0.85m | 7:32AM0.85m | 7:32PM0.79m | 9:48AM0.78m | 8:54PM0.74m | 12:53PM0.88m | 11:46PM0.76m | 1:28PM0.98m | 00:45AM0.84m | 1:56PM1.06m | 1:21AM0.93m | 2:21PM1.12m | 1:49AM1.03m | ||||||||
Low Tide | 1:31PM0.52m | 1:50AM0.49m | 3:06PM0.60m | 3:37AM0.47m | 4:52PM0.62m | 5:04AM0.41m | 6:14PM0.57m | 6:10AM0.32m | 7:07PM0.50m | 7:01AM0.22m | 7:45PM0.43m | 7:43AM0.13m | 8:18PM0.37m | ||||||||
 | |  | |  |  |  |  |  |  | |  | | | | | | | | | | |
 | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — |
 | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:38 | — |
mm | — | — | — | — | — | — | 1 | — | 7 | 8 | 6 | 6 | — | — | — | — | — | — | — | — | — |
Temp °C | 30 | 31 | 27 | 32 | 32 | 23 | 21 | 19 | 19 | 18 | 18 | 19 | 22 | 23 | 23 | 19 | 19 | 18 | 18 | 18 | 18 |
Feels °C | 28 | 29 | 24 | 30 | 31 | 22 | 22 | 19 | 19 | 19 | 20 | 20 | 22 | 23 | 24 | 18 | 17 | 18 | 18 | 17 | 19 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | SSW 4 | S 10 | S 9 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | S 7 | S 9 | S 8 | S 7 | S 8 |
| kJ | 34 | 50 | 35 | 36 | 38 | 43 | 24 | 22 | 6 | 220 | 180 | 188 | 158 | 158 | 145 | 127 | 56 | 246 | 82 | 38 | 49 |
Swell 2 Height (m) Direction Period (s) | S 11 | S 11 | S 10 | S 10 | S 9 | S 8 | S 8 | S 11 | ESE 8 | ESE 8 | ESE 8 | E 8 | ESE 8 | ESE 8 | SSE 14 | S 14 | S 13 | SE 9 | SE 9 | SE 9 | SE 9 |
| kJ | 2 | 2 | 2 | 7 | 6 | 6 | 5 | 2 | 20 | 12 | 6 | 4 | 6 | 6 | 36 | 144 | 161 | 53 | 51 | 50 | 28 |
Swell 3 Height (m) Direction Period (s) | — | S 11 | — | S 15 | — | S 13 | S 12 | S 11 | S 8 | — | — | — | E 8 | S 15 | SSE 16 | E 7 | SE 9 | E 7 | SSE 12 | SSE 11 | ESE 4 |
| kJ | — | 9 | — | 4 | — | 3 | 3 | 2 | 10 | — | — | — | 10 | 4 | 26 | 4 | 73 | 10 | 46 | 40 | 3 |
Wind waves Height (m) Direction Period (s) | N 2 | NNE 3 | — | NNW 2 | — | SSW 4 | S 4 | S 4 | — | — | — | NE 2 | — | — | — | SSW 4 | — | — | — | — | E 4 |
| kJ | 1 | 1 | — | 1 | — | 5 | 3 | 11 | — | — | — | 1 | — | — | — | 9 | — | — | — | — | 6 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 21 | 0 | 21 | 5 | 5 | 4 | 21 | 136 | 30 | 0 | 0 | 0 | 0 | 14 | 12 | 4 | 4 | 0 | 0 | 2 | 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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