Surf Forecasts:
Balneario Sao Jose surf forecast from 11 Aug 2026:
- Best quality surf: Monday 17 Aug, 12AM (local time) - 7ft (2.2m), 8s period, E swell with glassy winds.
- Most powerful swell: Tuesday 11 Aug, 12PM (local time) - 6ft (1.9m), 13s period, SSE swell with 1,230 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 6PM (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 Wednesday (Aug 12) at 6PM. The primary swell is predicted to be 1.4m and 12s period with a secondary swell of 1.1m 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 1.9m 13s and forecast to arrive on Tuesday (Aug 11) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Sunday (Aug 16) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Wed 12th Aug) | 4.5ft (1.4m) 12s |
| Best Surf | 12AM (Mon 17th Aug) | 7ft (2.2m) 8s |
| Most Powerful | 12PM (Tue 11th Aug) | 6ft (1.9m) 13s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, Rusty here, talking in feet and miles for you. We’ve got a bit of a slow start, but once it gets going, it’s gonna be worth the wait.
Right now, through the first few days, the swell is just a bit messy. Tuesday and Wednesday the 11th and 12th have some chest-high waves (5ft to 6ft) coming from the SSE with a period of 12 to 13 seconds, which is a nice long groundswell, but the wind is cross or cross-onshore, putting a bit of a bump on the face. The energy is moderate to strong (1215 down to 635), but the quality just isn't there yet. The water temp is sitting at 70°, which is a touch warmer than normal for this time of year.
The first real standout is Thursday morning, the 13th of August. The wind goes glassy, the swell drops a touch to 4ft, and the energy is still moderate (675). It’s going to be clean and fun, but it’s not the biggest day. Friday morning the 14th and Saturday morning the 15th are also looking glassy with a clean 4ft to 5ft SSE swell, good for a longboard or a fun mid-length.
Now, the real magic is on the horizon. Look out for Tuesday the 25th of August. We’ve got a solid 6ft S swell with a very long period of 15 seconds, and the energy is going to be strong (1418). The wind is glassy in the morning, making for excellent conditions. The swell direction is right on the money for the optimum direction from the SE, so Balneario Sao Jose is going to be the place to be. It’s an exposed beach and pier setup, so that long period groundswell might make it a bit straight, but with glassy wind, it’ll be clean. This is for experienced surfers only, as the size is over 5ft.
Then Wednesday the 26th of August, the swell picks up to 7ft with a 15-second period, but the wind turns offshore from the N. That’s a powerful (2122) and clean wave. This is expert territory, and the crowds are likely to be there, but it will be worth it.
Don’t bother with the days after the 20th; it’s just small and weak. The good run starts on the 24th, builds to a peak on the 25th and 26th, and then we’ll have to see.
Rusty out.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue morning. Warm (max 23°C on Thu morning, min 17°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sun morning, min 19°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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) | SSE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | S 12 | SSE 15 | SSE 14 | S 13 | S 13 | SSE 13 | SSE 12 | SSE 12 | SSE 11 | ESE 8 | ESE 8 | E 8 | ESE 9 | ESE 9 | ESE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1211 | 1092 | 692 | 838 | 589 | 598 | 341 | 869 | 743 | 573 | 564 | 722 | 639 | 569 | 213 | 232 | 238 | 650 | 454 | 368 | 232 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross-on | glassy | glassy | on | glassy | glassy | on | glassy | glassy | cross-on | cross-off | glassy | cross-on | glassy | glassy | on | cross-off |
High Tide | 2:35PM1.32m | 2:01AM1.20m | 3:01PM1.32m | 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 | ||||||||
Low Tide | 8:56PM0.40m | 8:53AM-0.05m | 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 | ||||||||
 |  |  |  |  |  | | | | | | | | | | | | | | | | |
 | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — |
 | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:49 | — |
mm | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 18 | 20 | 21 | 19 | 23 | 23 | 19 | 22 | 21 | 20 | 23 | 23 | 21 | 25 | 24 | 21 | 27 | 27 | 26 |
Feels °C | 16 | 17 | 18 | 21 | 22 | 20 | 24 | 24 | 21 | 24 | 23 | 23 | 24 | 24 | 23 | 27 | 26 | 24 | 29 | 30 | 27 |
Swell 1 Height (m) Direction Period (s) | SSE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | S 12 | SSE 15 | SSE 14 | S 13 | S 13 | SSE 13 | SSE 12 | SSE 12 | SE 6 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 |
| kJ | 1211 | 1092 | 692 | 838 | 589 | 598 | 341 | 869 | 743 | 573 | 564 | 722 | 639 | 569 | 98 | 232 | 238 | 344 | 454 | 368 | 232 |
Swell 2 Height (m) Direction Period (s) | E 8 | E 7 | E 7 | — | — | E 6 | SSE 15 | E 6 | E 5 | E 5 | E 8 | E 8 | E 10 | ESE 9 | SSE 11 | S 11 | S 11 | S 11 | SSE 10 | SSE 10 | SSE 10 |
| kJ | 4 | 4 | 1 | — | — | 62 | 304 | 16 | 9 | 5 | 12 | 6 | 7 | 8 | 213 | 114 | 82 | 58 | 36 | 33 | 18 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | E 6 | — | — | E 7 | — | E 8 | — | — | ESE 11 | ESE 13 | ESE 13 | ESE 12 | — | — | — |
| kJ | — | — | — | — | — | — | 30 | — | — | 4 | — | 6 | — | — | 23 | 16 | 16 | 15 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | E 7 | E 5 | E 6 | — | — | — | — | — | — | — | E 9 | ENE 5 | — | — | E 8 | — | — | — |
| kJ | — | — | — | 1 | 46 | 75 | — | — | — | — | — | — | — | 15 | 33 | — | — | 650 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 28 | 28 | 28 | 9 | 32 | 0 | 0 | 25 | 0 | 0 | 213 | 0 | 0 | 95 | 0 | 0 | 28 | 0 | 0 | 59 | 0 |
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.
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