
Surf Forecasts:
Balneario Sao Jose surf forecast from 9 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 9AM (local time) - 4.5ft (1.4m), 12s period, SSE swell with glassy winds.
- Most powerful swell: Monday 10 Aug, 6PM (local time) - 7ft (2.2m), 13s period, S swell with 1,519 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 9AM (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 9AM. The primary swell is predicted to be 1.4m and 12s period with a secondary swell of 0.7m and 4s. 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 2.2m 13s and forecast to arrive on Monday (Aug 10) at 6PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Wed 12th Aug) | 4.5ft (1.4m) 12s |
| Best Surf | 9AM (Wed 12th Aug) | 4.5ft (1.4m) 12s |
| Most Powerful | 6PM (Mon 10th Aug) | 7ft (2.2m) 13s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s cooking at Balneario Sao Jose. The next couple of weeks have a bit of a slow start, but there are a few windows where things come together nicely.
We’re looking at a solid stretch of south-southeast swell rolling in, but the wind is the main player here. For the first few days, it’s mostly onshore or cross-onshore, so the quality is going to be rough. Sunday the 9th has a 4ft south swell with 13-second period, but the onshore breeze makes it a scratchy affair. Water temp is sitting at 69°, which is a touch warmer than normal for this time of year – nothing crazy, just a bit of extra comfort.
Monday the 10th and Tuesday the 11th see the swell building to 6ft and even 6ft, and the energy is pumping hard, with combined energy values in the four digits (825 to 1166) – that’s strong wave energy for sure. But the wind is still messy, so these are days for the dedicated, not the ones looking for clean lines.
Then we get a proper gem. Wednesday morning the 12th is the first standout. The wind goes glassy out of the east at just 3 mph, and the swell is a clean 5ft from the SSE with a 12-second period. Combined energy is moderate at 608, but with those conditions, it’s going to be smooth, clean, and fun. This is a morning to have your board waxed and ready.
Thursday morning the 13th is another beauty. The wind drops to dead calm, glassy as it gets, with a 4ft south swell and a 12-second period. Energy is still solid at 610. This is the kind of session where it’s just you and the ocean, no bumps, no hassle.
Friday morning the 14th also looks sweet – glassy conditions, a 4ft south swell with 13-second period, and energy at 517. Another clean, easy morning.
After that, the surf drops off through the weekend and into the next week. The swell gets smaller and the wind turns messy again, with a lot of onshore and cross-onshore flow. There’s a little pulse of east-southeast swell around Monday the 17th, with a 4ft swell at 7-second period – that’s short period, so not much power, but the wind is glassy in the morning, so you might find a few soft ones. After that, it’s pretty quiet until about Thursday the 20th, when a tiny 3ft swell shows up, but it’s short period and weak energy.
The end of the window, around the 24th, sees a new south swell trying to build to 5ft with a long 14-second period, but the wind is cross-onshore and choppy, so it’s more of a kite-surfing kind of setup than a paddler’s dream.
Best on offer: Wednesday morning the 12th and Thursday morning the 13th. Get out there early, enjoy the glass, and grab some clean, lined-up waves.
Rusty.
Short Range ForecastHeavy rain (total 21mm), heaviest during Mon afternoon. Warm (max 20°C on Wed morning, min 16°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Thu morning, min 18°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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) | S 13 | S 11 | S 12 | SSE 13 | SSE 13 | SSE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | S 12 | SSE 15 | SSE 14 | S 13 | S 13 | SSE 14 | SSE 12 | SSE 12 | S 11 |
Wave Graph | ||||||||||||||||||||
392 | 657 | 773 | 1127 | 995 | 1092 | 1139 | 820 | 589 | 589 | 503 | 341 | 953 | 799 | 498 | 475 | 555 | 392 | 303 | 256 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | cross-on | cross-on | cross-on | glassy | cross | glassy | glassy | on | cross-off | glassy | cross-on | cross-off | cross-on | on | on |
High Tide | 00:53AM0.94m | 2:08PM1.28m | 1:28AM1.07m | 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 | ||||||||
Low Tide | 7:52PM0.42m | 7:38AM0.09m | 8:27PM0.40m | 8:18AM-0.01m | 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 | |||||||
— | — | 6:35 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | |
5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — | 5:49 | — | |
mm | 1 | 3 | 2 | 5 | 4 | 2 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | 3 |
Temp °C | 19 | 18 | 18 | 17 | 17 | 18 | 18 | 18 | 20 | 21 | 19 | 27 | 26 | 19 | 25 | 22 | 21 | 23 | 22 | 21 |
Feels °C | 20 | 18 | 19 | 15 | 16 | 18 | 18 | 18 | 21 | 22 | 21 | 29 | 27 | 21 | 27 | 23 | 23 | 25 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 11 | S 12 | E 8 | SSE 13 | SSE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | S 12 | SSE 15 | SSE 14 | S 13 | S 13 | SSE 14 | SSE 12 | SSE 12 | S 11 |
392 | 657 | 773 | 11 | 995 | 1092 | 1139 | 820 | 589 | 589 | 503 | 341 | 953 | 799 | 498 | 475 | 555 | 392 | 303 | 256 | |
Swell 2 Height (m) Direction Period (s) | E 6 | E 7 | E 8 | E 8 | E 8 | E 8 | — | — | — | — | E 6 | E 6 | E 6 | E 6 | E 6 | E 7 | E 7 | E 7 | E 8 | ESE 11 |
10 | 15 | 10 | 19 | 5 | 10 | — | — | — | — | 60 | 41 | 33 | 27 | 19 | 22 | 23 | 16 | 22 | 41 | |
Swell 3 Height (m) Direction Period (s) | — | SSE 16 | E 8 | — | E 12 | — | — | — | — | — | — | SSE 15 | — | — | — | — | — | — | — | ESE 11 |
— | 51 | 42 | — | 3 | — | — | — | — | — | — | 228 | — | — | — | — | — | — | — | 13 | |
Wind waves Height (m) Direction Period (s) | S 6 | — | — | SSE 13 | — | — | E 7 | E 7 | E 4 | E 4 | E 6 | — | — | — | — | — | — | — | — | — |
39 | — | — | 1127 | — | — | 27 | 24 | 19 | 17 | 86 | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 175 | 32 | 32 | 95 | 95 | 28 | 28 | 59 | 0 | 28 | 0 | 0 | 152 | 0 | 0 | 168 | 0 | 75 | 119 | 32 |
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.











