Surf Forecasts:
Balneario Sao Jose surf forecast from 13 Aug 2026:
- Best quality surf: Saturday 15 Aug, 12AM (local time) - 5.5ft (1.7m), 14s period, SSE swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 12PM (local time) - 7ft (2.1m), 12s period, SE swell with 1,327 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 12AM (local time) - 4.5ft (1.4m), 12s period with SSE swell.
Best Forecast Surf Conditions for Balneario Sao Jose this week:
The surf forecast for Balneario Sao Jose over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 13) at 12AM. The primary swell is predicted to be 1.4m and 12s period with a secondary swell of 0.7m and 5s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Balneario Sao Jose in the next 16 days are 2.1m 12s and forecast to arrive on Saturday (Aug 15) at 12PM. 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+) | 12AM (Thu 13th Aug) | 4.5ft (1.4m) 12s |
| Best Surf | 12AM (Sat 15th Aug) | 5.5ft (1.7m) 14s |
| Most Powerful | 12PM (Sat 15th Aug) | 7ft (2.1m) 12s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
G’day, Rusty here. We’ve got a mixed bag of surf coming up for Balneario Sao Jose. The pattern kicks off with some decent pulses, but there’s a flat spell to push through before things get really interesting again in the second week.
The first real window is Thursday, 13th August. Thursday morning is the standout early in the period. We’ve got clean 5ft swell from the SSE with a 13-second period, and the wind is dead glass – absolutely zero, making for perfect conditions. The wave energy is moderate at 681. This is the pick of the first few days. Thursday afternoon sees the swell bump up to 5ft from the SSE and the period stretches to a juicy 15 seconds, giving the waves more punch and shape, but the wind turns onshore, so it won’t be as clean as the morning.
Friday, 14th August, the morning is a bit messy with a cross-onshore wind and 4ft S swell. But Friday afternoon is another glassy session – 4ft from the SSE with a 13-second period and clean conditions. Wave energy sits at 587, so it’s a solid, surfable option.
Saturday, 15th August, sees the swell bump up to 6ft from the SSE in the morning, but the cross-shore wind messes it up. Saturday afternoon drops to 4ft and gets choppy with a 12 mph cross-shore wind – not worth paddling out for.
Sunday, 16th August, morning brings a clean glassy session with 6ft from the ESE. But that period is short at only 8 seconds, so it’ll be a bit crumbly and less organised. Still, with no wind, it’ll be fun for a few. The afternoon gets a cross-onshore breeze, so the morning is the call.
Monday, 17th August, morning is glassy again with 6ft from the ESE and a 9-second period. Wave energy is moderate at 530. A nice session if you can sneak out.
Then the forecast goes quiet. From Tuesday, 18th August, through to Saturday, 22nd August, it’s mostly poor with small, weak swells and onshore winds. There’s a long gap of about five days with no real quality on offer. Swell drops to under 3ft and the combined energy dips below 100 on the 19th and 20th – really weak stuff.
But hang in there. Sunday, 23rd August, morning fires up again. Clean glassy conditions with a solid 7ft swell from the S, with an 11-second period. Wave energy is strong at 938. That’s a proper session, but at 7ft it’s getting into intermediate-to-expert territory. The afternoon stays at 7ft but the wind goes onshore, so hit it early.
Monday, 24th August, morning is the real standout of the whole outlook. Glassy calm, 6ft from the SSE with a 12-second period, and the combined wave energy jumps to 1025 – that’s strong, powerful surf. The water temperature is about 70°, which is a touch warmer than normal for this time of year, so you won’t need a thick suit. The swell is well-directed and the conditions are perfect. This is the session to circle on the calendar.
Tuesday, 25th August, holds solid with 6ft from the S and a 14-second period – very long period groundswell. Energy is strong at 1234, but the cross-shore wind will put a bit of texture on it. Still, the power and shape will be there.
After that, the swell slowly fades through Wednesday and Thursday, 26th and 27th August, with onshore winds and smaller, weaker waves.
Overall, the best on offer is Thursday 13th morning for clean fun waves, but the absolute standout is Monday 24th morning – glassy, strong, well-directed swell, and plenty of power.
Catch ya in the water.
Rusty
Short Range ForecastMostly dry. Warm (max 23°C on Thu morning, min 18°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 30°C on Tue morning, min 19°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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 12 | S 12 | SSE 15 | S 14 | S 13 | SSE 13 | SSE 14 | SSE 13 | S 12 | E 7 | E 8 | ESE 8 | E 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | S 6 |
Wave Graph | |||||||||||||||||||
598 | 425 | 1021 | 849 | 564 | 599 | 1019 | 998 | 359 | 338 | 470 | 370 | 637 | 415 | 351 | 227 | 254 | 169 | 92 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | on | cross | glassy | on | glassy | cross-on | cross | cross | cross | cross-on | cross-off | glassy | on | off | off | cross-on | cross-on |
High Tide | 2:33AM1.30m | 3:26PM1.29m | 3:06AM1.36m | 3:50PM1.25m | 3:38AM1.38m | 4:14PM1.21m | 4:11AM1.35m | 4:37PM1.16m | 4:44AM1.27m | 5:00PM1.10m | 5:19AM1.16m | 5:24PM1.03m | |||||||
Low Tide | 9:19PM0.40m | 9:24AM-0.05m | 9:35PM0.40m | 9:50AM0.01m | 9:45PM0.38m | 10:10AM0.09m | 9:53PM0.35m | 10:26AM0.20m | 10:08PM0.32m | 10:39AM0.32m | 10:29PM0.32m | 10:52AM0.43m | 10:54PM0.35m | ||||||
— | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | |
— | — | 5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 19 | 23 | 23 | 19 | 20 | 20 | 20 | 22 | 22 | 21 | 24 | 23 | 20 | 25 | 24 | 26 | 30 | 21 | 19 |
Feels °C | 21 | 25 | 25 | 21 | 22 | 22 | 22 | 23 | 21 | 23 | 26 | 25 | 23 | 27 | 27 | 25 | 30 | 19 | 19 |
Swell 1 Height (m) Direction Period (s) | SSE 12 | S 12 | SSE 15 | S 14 | S 13 | SSE 13 | SSE 14 | SSE 13 | S 12 | SSE 12 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | S 6 |
598 | 425 | 1021 | 849 | 564 | 599 | 1019 | 998 | 359 | 224 | 291 | 370 | 460 | 415 | 351 | 227 | 254 | 169 | 91 | |
Swell 2 Height (m) Direction Period (s) | E 5 | SSE 15 | E 6 | E 6 | E 5 | E 8 | E 8 | — | — | — | SSE 11 | SSE 11 | S 11 | S 10 | SSE 10 | SSE 10 | SSE 10 | — | ESE 8 |
27 | 312 | 15 | 9 | 5 | 6 | 6 | — | — | — | 126 | 88 | 59 | 55 | 36 | 36 | 21 | — | 92 | |
Swell 3 Height (m) Direction Period (s) | — | E 5 | — | — | — | — | — | — | — | — | ESE 13 | SE 14 | — | — | SSE 13 | — | — | — | — |
— | 14 | — | — | — | — | — | — | — | — | 16 | 7 | — | — | 17 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | E 9 | ESE 6 | E 7 | E 8 | — | E 8 | — | — | — | SW 2 | SSW 4 | — |
— | — | — | — | — | — | — | 6 | 205 | 338 | 470 | — | 637 | — | — | — | 1 | 40 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 32 | 0 | 0 | 47 | 19 | 9 | 0 | 28 | 28 | 95 | 9 | 0 | 28 | 0 | 0 | 25 | 0 | 140 | 504 |
Best forecast wave conditions in São Paulo | |||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||
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Information about the Balneario Sao Jose Surf forecast
The above surf forecast table for Balneario Sao Jose provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Balneario Sao Jose can be found by selecting the local surf guide option on the grey menu. Our Balneario Sao Jose 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 (Balneario Sao Jose) 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 Balneario Sao Jose 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.
Balneario Sao Jose is 3 km (2 miles) from the city of Mongagua. If you plan a holiday in São Paulo, look for hotels and other accommodation in Mongagua. Mongagua has rooms for a wide range of budgets as well as car hire and transport links.











