Surf Forecasts:
Balneario Sao Jose surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 3AM (local time) - 2.5ft (0.8m), 10s period, S swell with glassy winds.
- Most powerful swell: Sunday 13 Sep, 9AM (local time) - 6ft (1.8m), 11s period, SSE swell with 743 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 3AM (local time) - 2.5ft (0.8m), 10s period with S 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 (Sep 09) at 3AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.9m and 7s. 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 1.8m 11s and forecast to arrive on Sunday (Sep 13) at 9AM. 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+) | 3AM (Wed 9th Sep) | 2.5ft (0.8m) 10s |
| Best Surf | 3AM (Wed 9th Sep) | 2.5ft (0.8m) 10s |
| Most Powerful | 9AM (Sun 13th Sep) | 6ft (1.8m) 11s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, crew, Rusty here. Let's break down what's happening at Balneario Sao Jose for the next 16 days.
We're looking at a slow start. The first real chance to paddle out is Wednesday morning, September 9th. The swell is a tiny 3ft from the SSE, but the wind is glassy, dead calm. That means the surface will be like a mirror, so even though it's small, the quality will be there. The combined energy is moderate at 226.
Wednesday afternoon, the wind gets onshore and things turn ugly. Thursday morning, September 10th, looks alright again with glassy conditions and a similar 3ft swell from the S, with a touch more energy at 265. But Thursday afternoon and Friday the wind gets messy, so it's a no-go.
We hit a bit of a lull and some choppy conditions through the weekend and into the start of the next week. The surf gets a bit bigger on Sunday the 13th, pushing 6ft from the SSE, but it's cross-onshore and choppy, making it a rough one. The energy is strong at 769, but the wind completely ruins it.
Now, listen up, because the real standout window is Friday, September 18th. We get a proper offshore wind from the NNW in the morning, with a clean 4ft swell from the S. The period is a solid 13 seconds, so it's got some real groundswell power, and the energy is pumping at 776. This is the best call of the whole outlook. That offshore wind is going to make those waves stand up perfectly. Friday afternoon holds up too, with offshore northerly wind and a clean 3ft S swell.
After that, it settles down again for a few days. The wind and swell get a bit funky. Then we see another decent chance on Monday morning, September 21st. The wind goes glassy again, and we get a 3ft S swell. The period is short at 7 seconds, so it'll be a bit weaker, but those glassy conditions will make it fun.
Looking further out, Wednesday morning, September 23rd, is another one to circle. The wind is glassy with a 4ft swell from the ESE, and the energy is moderate at 223. The period is short at 8 seconds, but for a clean, small day, it'll be a good one. Thursday the 24th morning also looks glassy, with a very clean 5ft ESE swell.
So, the absolute best bet is the morning of Friday, September 18th. Mark your calendar for that one. The rest of the window has some small, clean sessions, but that Friday is the one to chase.
Rusty.
Short Range ForecastHeavy rain (total 74mm), heaviest during Thu night. Warm (max 27°C on Fri afternoon, min 17°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 79mm), heaviest during Sun night. Warm (max 26°C on Fri night, min 17°C on Sun afternoon). Mainly fresh winds. | ||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||
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 10 | ESE 8 | SSE 12 | S 12 | S 12 | S 15 | S 13 | S 12 | E 6 | E 8 | S 7 | S 9 | SSE 11 | SSE 10 | ESE 7 | SSE 10 | ESE 7 | S 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 125 | 123 | 102 | 192 | 180 | 199 | 161 | 225 | 151 | 91 | 29 | 149 | 481 | 743 | 731 | 431 | 373 | 255 | 146 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | on | glassy | glassy | cross-on | glassy | cross | cross | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross |
High Tide | 1:11AM1.16m | 2:09PM1.29m | 1:42AM1.29m | 2:29PM1.30m | 2:13AM1.38m | 2:51PM1.30m | 2:44AM1.43m | 3:12PM1.27m | 3:15AM1.42m | 3:34PM1.24m | 3:47AM1.36m | 3:55PM1.19m | |||||||
Low Tide | 7:58AM-0.02m | 8:21PM0.35m | 8:28AM-0.04m | 8:39PM0.31m | 8:54AM-0.01m | 8:54PM0.27m | 9:15AM0.05m | 9:07PM0.23m | 9:32AM0.14m | 9:21PM0.19m | 9:46AM0.24m | 9:38PM0.18m | |||||||
 |  | | |  | | |  |  | | | |  |  | |  | | |  | |
 | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:05 | — | — | 6:05 | — | — | 6:03 | — | — |
 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — |
mm | 7 | 16 | 11 | 1 | 4 | 14 | 18 | 3 | — | 7 | 3 | 3 | 4 | 10 | 16 | 33 | 2 | 1 | 8 |
Temp °C | 18 | 19 | 20 | 21 | 22 | 21 | 21 | 24 | 27 | 26 | 19 | 18 | 18 | 18 | 18 | 17 | 20 | 20 | 19 |
Feels °C | 19 | 21 | 23 | 25 | 26 | 23 | 24 | 25 | 29 | 29 | 18 | 18 | 18 | 18 | 15 | 14 | 20 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | ESE 7 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | S 12 | ESE 8 | S 13 | S 12 | E 5 | E 5 | E 8 | S 9 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | ESE 7 | ESE 7 |
| kJ | 86 | 99 | 102 | 96 | 77 | 199 | 83 | 225 | 151 | 45 | 20 | 31 | 481 | 743 | 731 | 363 | 373 | 251 | 132 |
Swell 2 Height (m) Direction Period (s) | S 10 | SSE 10 | SSE 10 | SSE 12 | S 12 | ESE 8 | S 12 | E 8 | SE 13 | S 12 | E 8 | S 11 | E 8 | — | — | — | S 10 | S 9 | S 11 |
| kJ | 125 | 123 | 96 | 192 | 180 | 81 | 139 | 60 | 7 | 68 | 29 | 20 | 33 | — | — | — | 214 | 113 | 146 |
Swell 3 Height (m) Direction Period (s) | SE 12 | S 15 | SSE 14 | E 14 | SE 14 | SSE 17 | S 15 | SE 13 | — | ESE 8 | SE 12 | S 9 | — | — | — | — | — | SE 10 | SE 10 |
| kJ | 39 | 4 | 37 | 4 | 8 | 56 | 161 | 7 | — | 19 | 6 | 6 | — | — | — | — | — | 102 | 92 |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 2 | — | — | — | — | E 8 | E 6 | S 4 | S 7 | — | ESE 9 | E 5 | ESE 7 | ESE 7 | E 7 | — |
| kJ | — | — | — | 1 | — | — | — | — | 57 | 91 | 23 | 149 | — | 26 | 80 | 431 | 346 | 255 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 28 | 0 | 0 | 35 | 0 | 9 | 80 | 48 | 168 | 175 | 32 | 28 | 95 | 95 | 26 | 26 | 19 |
Best forecast wave conditions in São Paulo | |||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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