Surf Forecasts:
Balneario Sao Jose surf forecast from 31 Aug 2026:
- Best quality surf: Thursday 3 Sep, 3AM (local time) - 4.5ft (1.4m), 10s period, SSE swell with cross-offshore winds.
- Most powerful swell: Thursday 3 Sep, 12PM (local time) - 4.5ft (1.3m), 11s period, SSE swell with 382 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 6PM (local time) - 1.5ft (0.4m), 8s period with ESE 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 Monday (Aug 31) at 6PM. The primary swell is predicted to be 0.4m and 8s period with a secondary swell of 0.6m and 5s. Another secondary swell of 0.5m and 6s is also forecast. 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 1.3m 11s and forecast to arrive on Thursday (Sep 03) 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 0.5m 3s period and expected on Tuesday (Sep 01) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 31st Aug) | 1.5ft (0.4m) 8s |
| Best Surf | 3AM (Thu 3rd Sep) | 4.5ft (1.4m) 10s |
| Most Powerful | 12PM (Thu 3rd Sep) | 4.5ft (1.3m) 11s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s shaping up at Balneario Sao Jose for the next couple of weeks.
Monday is flat and forgettable. There’s a tiny 2ft easterly swell but the morning is glassy, so you can get wet but it’s barely there. Water temp is 71°, which is much warmer than normal – about 4° above average, so you might want a thinner suit or just boardshorts.
Tuesday morning brings a bump to 4ft from the south under glassy skies. The energy is moderate. The wind goes offshore out of the NW at 12 mph in the afternoon, keeping things clean. That’s a solid day.
Wednesday gets messy. Swell hangs around 4-5ft but the wind is cross-onshore and conditions turn choppy. Not worth it. Thursday the 3rd though – that’s a standout. Crystal clear skies, glassy wind, and a 4ft SSE swell with a long 11-second period. That’s proper groundswell with moderate energy. It’s going to be clean and punchy. Expect crowds though. Friday morning is similar but smaller at 3ft, still glassy and fun.
The weekend goes south. Saturday and Sunday are poor with cross-onshore winds and weak, choppy surf. Monday the 7th has some size up to 7ft but it’s onshore and messy – not your day.
Now the real highlight. Wednesday the 9th of September. Light rain in the morning but wind is light and cross-offshore, turning glassy by afternoon. Swell hits 6ft from the ESE with 8-9 second period. Combined energy is strong – over 600. That’s clean, powerful surf. The best of the whole outlook. At 6ft it’s for intermediates and up.
Thursday the 10th sees the swell peak at 8ft from the ESE, but wind goes cross-shore and it gets a bit bumpy. The energy is massive – over 1500 – but the quality drops. That’s only for experts.
From Friday the 11th onward, things settle. Clean, glassy mornings with smaller 4-5ft ESE swells. Fun but nothing special. Monday the 14th sees a 6ft easterly but cross-onshore winds make it marginal. Tuesday the 15th has a glassy 4ft start but showers move in.
Bottom line: Monday is a dud, Tuesday is fun, Thursday the 3rd morning is a standout, and the absolute best is Wednesday the 9th with glassy conditions and strong, clean swell. After that, it fades.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Mon afternoon. Warm (max 26°C on Tue morning, min 15°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 22mm), heaviest during Sun morning. Warm (max 27°C on Fri morning, min 19°C on Thu afternoon). Wind will be generally light. | |||||||||||||||||||
Mon 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
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) | ESE 8 | S 7 | S 7 | SSE 7 | E 9 | SSE 7 | SSE 8 | SSE 10 | SSE 11 | SSE 11 | SSE 11 | SE 11 | SE 11 | ESE 8 | E 8 | E 8 | E 9 | S 7 | SSE 6 | SSE 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 72 | 37 | 81 | 84 | 78 | 220 | 253 | 370 | 375 | 305 | 247 | 172 | 117 | 87 | 71 | 51 | 73 | 71 | 167 | 238 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | off | cross-off | cross-on | cross-on | on | cross | glassy | cross-on | cross-off | glassy | on | glassy | cross-on | on | glassy | on | on | on |
High Tide | 4:28PM1.24m | 4:42AM1.33m | 5:00PM1.13m | 5:25AM1.21m | 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 | ||||||
Low Tide | 10:09PM0.27m | 10:40AM0.31m | 10:20PM0.31m | 10:47AM0.47m | 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 | ||||||
 |  |  |  | | |  |  |  | | | | | | | |  |  |  | | |
 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — |
 | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:55 | — |
mm | 3 | 3 | 1 | 2 | 5 | 1 | — | — | — | — | — | — | 2 | 2 | 1 | 2 | 6 | 9 | 12 | 9 |
Temp °C | 24 | 21 | 26 | 22 | 19 | 20 | 20 | 18 | 22 | 21 | 20 | 27 | 25 | 20 | 20 | 20 | 20 | 20 | 18 | 17 |
Feels °C | 27 | 24 | 27 | 22 | 18 | 19 | 19 | 17 | 22 | 21 | 20 | 28 | 26 | 22 | 22 | 22 | 22 | 21 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | E 5 | S 7 | SSE 7 | E 9 | SSE 7 | SSE 8 | SSE 10 | SSE 11 | SSE 11 | SSE 11 | E 7 | ESE 8 | ESE 8 | E 8 | E 8 | E 9 | S 7 | ESE 8 | S 12 |
| kJ | 72 | 37 | 81 | 84 | 78 | 220 | 253 | 370 | 375 | 305 | 247 | 83 | 101 | 87 | 71 | 51 | 73 | 71 | 21 | 24 |
Swell 2 Height (m) Direction Period (s) | S 6 | S 7 | E 8 | E 8 | SSE 7 | E 9 | E 9 | E 9 | E 9 | E 9 | E 6 | SE 11 | SE 11 | SSE 10 | SSE 4 | SE 10 | SE 10 | E 8 | S 13 | — |
| kJ | 11 | 34 | 55 | 58 | 32 | 41 | 25 | 13 | 13 | 13 | 50 | 172 | 117 | 68 | 6 | 25 | 14 | 35 | 29 | — |
Swell 3 Height (m) Direction Period (s) | S 9 | ESE 8 | WSW 4 | — | SE 10 | — | — | — | — | — | E 9 | S 11 | S 10 | S 9 | SE 10 | SSW 4 | SSW 5 | S 14 | — | — |
| kJ | 2 | 21 | 12 | — | 4 | — | — | — | — | — | 6 | 2 | 2 | 2 | 25 | 2 | 2 | 15 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SSW 4 | — | SSW 7 | — | — | E 4 | — | — | — | — | — | SE 4 | — | — | SSE 6 | SSE 6 |
| kJ | — | — | — | — | 39 | — | 84 | — | — | 16 | — | — | — | — | — | 5 | — | — | 167 | 238 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 100 | 0 | 0 | 0 | 140 | 168 | 135 | 26 | 0 | 32 | 0 | 0 | 25 | 0 | 28 | 175 | 0 | 50 | 128 |
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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