Surf Forecasts:
Balneario Sao Jose surf forecast from 2 Sep 2026:
- Best quality surf: Thursday 3 Sep, 12AM (local time) - 5ft (1.6m), 11s period, SSE swell with cross-offshore winds.
- Most powerful swell: Thursday 3 Sep, 3AM (local time) - 5ft (1.6m), 11s period, SSE swell with 619 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 12AM (local time) - 5ft (1.6m), 11s 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 (Sep 03) at 12AM. The primary swell is predicted to be 1.6m and 11s period with a secondary swell of 0.3m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Balneario Sao Jose in the next 16 days are 1.6m 11s and forecast to arrive on Thursday (Sep 03) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Thu 3rd Sep) | 5ft (1.6m) 11s |
| Best Surf | 12AM (Thu 3rd Sep) | 5ft (1.6m) 11s |
| Most Powerful | 3AM (Thu 3rd Sep) | 5ft (1.6m) 11s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about what’s heading our way for Balneario Sao Jose. It’s a bit of a mixed bag, with some real promise and some flat spells to work around.
The water is sitting at a nice 71°, which is a touch warmer than we usually get this time of year – a pleasant surprise for the first surf of the period.
We’ve got a bit of a slow start. The first real window to get wet kicks off on Wednesday the 2nd of September in the afternoon. There’s a solid south swell pushing in at 5ft, but the wind is onshore from the SSE, so it’s going to be a bit lumpy. The combined wave energy is moderate (536). It’s surfable, but not the best we’ll see.
The real standout for the first week looks like Thursday the 3rd of September. Get up early. The morning is where it’s at with a clean 5ft swell from the SSE, a nice 11-second period, and a light cross-offshore breeze from the NE. It’ll be glassy, with good shape. The energy is moderate (503). This is your best bet for the early days.
The waves drop off after that. Friday the 4th is small with a 3ft swell, but the morning is pure glass – zero wind. It’ll be clean but tiny. The weekend and start of the next week look pretty ordinary. Lots of onshore wind and rain, with only small, choppy waves. The energy drops right down to weak (96) by Saturday afternoon. It’s a bit of a flat spell for a few days.
Things start to look interesting again later in the second week. Tuesday the 10th of September brings a 7ft easterly swell with a moderate 8-second period and a clean cross-offshore wind. The energy jumps up to strong (890). That’s going to be a solid, powerful day at the beach. It’s a bit much for beginners, but for the experienced crew, it’ll be a ripper.
After that, the swell backs off a touch, but the Thursday morning on the 17th of September has a 3ft south swell with a very long 13-second period and glassy conditions. The energy is moderate (347). That long period groundswell will wrap in nicely, but at a beach break it might be a bit straight. Still, clean and glassy is hard to beat.
Overall, the best on offer is the Thursday morning the 3rd for the clean, fun waves, and the Tuesday the 10th for the big, powerful swell if you’re after some size. It’s a classic September pattern – some gold, some gaps.
Stay safe, Rusty.
Short Range ForecastSome drizzle, heaviest during Sat morning. Warm (max 25°C on Fri morning, min 16°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 55mm), heaviest during Sun morning. Warm (max 20°C on Sat afternoon, min 16°C on Sun afternoon). Wind will be generally light. | |||||||||||||||||||
Wed 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | ||||||||||||||
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 10 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 10 | S 6 | S 6 | S 6 | SSE 7 | S 7 | SSE 6 | SSE 7 | S 8 | S 8 | S 11 | S 10 | S 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 509 | 582 | 486 | 443 | 302 | 190 | 149 | 71 | 51 | 37 | 86 | 269 | 107 | 185 | 255 | 401 | 273 | 146 | 244 | 196 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-off | cross-off | cross-on | cross-off | glassy | cross-on | cross | glassy | cross-on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-off |
High Tide | 5:34PM1.00m | 6:18AM1.06m | 6:14PM0.86m | 7:35AM0.91m | 1:14PM0.85m | 7:15PM0.74m | 1:22PM0.99m | 9:36PM0.70m | 1:31PM1.11m | 00:11AM0.84m | 1:40PM1.20m | 00:41AM1.00m | 1:52PM1.26m | 1:11AM1.16m | ||||||
Low Tide | 10:34PM0.36m | 10:48AM0.64m | 10:54PM0.44m | 10:43AM0.79m | 4:56PM0.69m | 11:18PM0.54m | 4:35AM0.48m | 6:16PM0.60m | 5:50AM0.33m | 6:59PM0.51m | 6:41AM0.17m | 7:31PM0.44m | 7:22AM0.05m | 7:58PM0.39m | ||||||
 |  |  | | | | |  |  |  |  |  | | | | | | | | | |
 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | 6:11 | — | — | 6:11 | — | — |
 | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:57 | — |
mm | — | — | — | — | — | — | — | — | 1 | 5 | 10 | 10 | 7 | 9 | 2 | 4 | 6 | 2 | 2 | — |
Temp °C | 20 | 18 | 23 | 23 | 20 | 25 | 22 | 19 | 21 | 20 | 19 | 17 | 17 | 16 | 16 | 16 | 16 | 18 | 18 | 18 |
Feels °C | 20 | 18 | 23 | 23 | 21 | 25 | 21 | 21 | 23 | 21 | 18 | 16 | 16 | 14 | 16 | 14 | 14 | 18 | 18 | 17 |
Swell 1 Height (m) Direction Period (s) | S 10 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | E 8 | E 8 | E 8 | S 6 | S 6 | E 9 | SSE 7 | ESE 6 | S 11 | SSE 12 | S 8 | S 8 | S 8 | S 10 | S 10 |
| kJ | 509 | 582 | 486 | 443 | 302 | 120 | 108 | 69 | 44 | 32 | 39 | 269 | 55 | 10 | 29 | 401 | 273 | 94 | 244 | 196 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | E 8 | E 8 | — | E 6 | SSE 11 | SSE 11 | SSE 10 | E 8 | E 8 | SSE 10 | ESE 8 | S 9 | S 15 | — | ESE 6 | ESE 6 | S 11 | ESE 6 | — |
| kJ | 25 | 13 | 13 | — | 52 | 190 | 149 | 71 | 51 | 37 | 10 | 22 | 44 | 4 | — | 40 | 34 | 146 | 24 | — |
Swell 3 Height (m) Direction Period (s) | SE 8 | — | — | — | — | S 11 | S 10 | S 4 | SSE 10 | SE 10 | S 16 | S 14 | ESE 8 | SSE 9 | — | SSE 11 | S 10 | ESE 6 | — | — |
| kJ | 2 | — | — | — | — | 2 | 2 | 14 | 42 | 27 | 5 | 16 | 21 | 28 | — | 42 | 75 | 24 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | E 4 | E 4 | E 6 | — | SSW 3 | — | — | — | S 6 | — | S 7 | SSE 6 | SSE 7 | — | — | — | — | E 6 |
| kJ | — | — | 4 | 40 | 80 | — | 6 | — | — | — | 86 | — | 107 | 185 | 255 | — | — | — | — | 164 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 410 | 0 | 0 | 28 | 0 | 0 | 51 | 19 | 0 | 135 | 168 | 95 | 95 | 95 | 32 | 95 | 95 | 80 | 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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