Surf Forecasts:
Balneario Sao Jose surf forecast from 21 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 6AM (local time) - 3.5ft (1.0m), 16s period, SSE swell with glassy winds.
- Most powerful swell: Monday 24 Aug, 9PM (local time) - 7ft (2.1m), 16s period, S swell with 2,181 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 9PM (local time) - 4ft (1.2m), 7s 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 Friday (Aug 21) at 9PM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.6m and 8s. 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 2.1m 16s and forecast to arrive on Monday (Aug 24) at 9PM. 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+) | 9PM (Fri 21st Aug) | 4ft (1.2m) 7s |
| Best Surf | 6AM (Wed 26th Aug) | 3.5ft (1.0m) 16s |
| Most Powerful | 9PM (Mon 24th Aug) | 7ft (2.1m) 16s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the menu for Balneario Sao Jose over the next couple of weeks.
Right off the bat, we’ve got a bit of a slow start. Friday’s not doing us any favours with tiny, weak waves and poor conditions, so you’re better off leaving the boards in the shed for a day or two. The wait pays off, though, because the real action starts building through the weekend and into the start of the week.
The standout window is from Tuesday the 25th through Thursday the 27th. That’s where the magic is. Tuesday afternoon sees a clean 5ft swell from the S with glassy conditions—that’s the kind of session you daydream about. Wednesday morning the 26th is the absolute pick of the bunch: a solid 5ft groundswell from the SSE with a very long period of 16 seconds, and the wind is dead calm, glassy as a mirror. The combined energy is pumping at 1319 (moderate to strong), and the water is sitting at 71°, which is a good 4° warmer than usual for this time of year, so it’s a touch more comfortable than you’d expect. This is a proper groundswell, though, so it’ll be better shaped and have longer gaps between sets, making the paddle out a bit easier. It’s an intermediate spot, but with that size and power, it’s more for the experienced crew.
Thursday morning the 27th is another beauty: 5ft from the SSE, 14-second period, and glassy with ENE light air. That’s clean, lined-up surf and a real treat for anyone who can get out there.
Later in the week, things drop off. Friday the 28th has some small glassy waves but they’re pretty ordinary. By the weekend and into the following week, the swell fades right out, and we’re looking at a lot of days with poor surf and onshore winds. There’s a small bump of energy around the 5th of September, but it’s messy and cross-onshore, so not worth getting excited about.
If you’re a beginner, don’t bother with the bigger days—5ft is pushing it for you. And on the Wednesday and Thursday, the long period means the wave will wall up nicely, so that’s a spot for the confident surfer looking for a clean, powerful ride. Crowds can be a factor here, so get there early if you want a piece of the glass.
The locals are going to be fired up for that Wednesday morning session. That’s the one to circle on the calendar.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Sun night. Warm (max 26°C on Fri morning, min 17°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Mon morning. Warm (max 21°C on Wed morning, min 16°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | E 7 | S 6 | S 6 | S 11 | S 10 | S 10 | SSE 10 | SSE 10 | SSE 13 | S 14 | SSE 13 | S 15 | SSE 14 | S 13 | S 13 | SSE 16 | SSE 14 | SSE 13 | SSE 14 | SSE 14 | SSE 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 33 | 163 | 78 | 566 | 452 | 392 | 328 | 385 | 774 | 1028 | 1641 | 1787 | 1380 | 806 | 564 | 1180 | 1143 | 651 | 767 | 622 | 390 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | glassy | cross-on | on | cross | on | on | on | on | cross-on | cross-on | cross-on | glassy | cross-off | glassy | cross-on | glassy | glassy | cross-on | glassy |
High Tide | 1:28PM0.82m | 7:40PM0.75m | 1:16PM0.93m | 00:01AM0.78m | 1:25PM1.04m | 00:39AM0.91m | 1:40PM1.14m | 1:05AM1.05m | 1:57PM1.22m | 1:30AM1.18m | 2:16PM1.29m | 1:56AM1.30m | 2:38PM1.34m | 2:25AM1.39m | |||||||
Low Tide | 10:28AM0.77m | 5:16PM0.72m | 5:01AM0.47m | 6:21PM0.62m | 6:06AM0.35m | 6:57PM0.51m | 6:51AM0.22m | 7:27PM0.41m | 7:28AM0.10m | 7:55PM0.34m | 8:02AM0.01m | 8:23PM0.28m | 8:34AM-0.05m | 8:50PM0.24m | |||||||
 |  |  | | | | |  |  | |  | | | |  | | |  | | |  | |
 | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — |
 | — | 5:51 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — |
mm | — | — | — | — | — | — | — | 2 | 5 | 3 | — | 3 | — | 2 | — | — | — | 1 | — | — | — |
Temp °C | 26 | 20 | 18 | 19 | 19 | 18 | 19 | 18 | 18 | 17 | 17 | 18 | 20 | 18 | 18 | 21 | 21 | 19 | 25 | 24 | 24 |
Feels °C | 25 | 19 | 18 | 18 | 18 | 17 | 20 | 18 | 18 | 16 | 16 | 18 | 22 | 19 | 19 | 22 | 22 | 21 | 27 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 8 | S 6 | S 11 | S 10 | S 10 | SSE 10 | SSE 10 | SSE 13 | S 14 | SSE 13 | S 15 | SSE 14 | S 13 | S 13 | SSE 16 | SSE 14 | SSE 13 | SSE 14 | SSE 14 | E 7 |
| kJ | 33 | 55 | 78 | 566 | 452 | 392 | 328 | 385 | 774 | 1028 | 1641 | 1787 | 1380 | 806 | 564 | 1180 | 1143 | 651 | 767 | 622 | 130 |
Swell 2 Height (m) Direction Period (s) | S 9 | — | E 8 | E 8 | E 7 | E 7 | E 7 | E 7 | E 7 | — | — | — | — | — | SSE 17 | E 6 | E 6 | ESE 6 | ESE 7 | — | SSE 13 |
| kJ | 24 | — | 31 | 19 | 10 | 9 | 1 | 4 | 1 | — | — | — | — | — | 329 | 39 | 23 | 40 | 77 | — | 390 |
Swell 3 Height (m) Direction Period (s) | SE 11 | — | S 10 | — | — | — | — | — | — | — | — | — | — | — | — | E 6 | SSE 18 | SSE 16 | — | — | — |
| kJ | 5 | — | 18 | — | — | — | — | — | — | — | — | — | — | — | — | 38 | 180 | 232 | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 3 | S 6 | — | — | — | — | — | — | ESE 4 | SE 5 | — | — | — | E 4 | E 5 | E 6 | — | E 6 | — | ESE 7 | — |
| kJ | 1 | 163 | — | — | — | — | — | — | 21 | 47 | — | — | — | 33 | 41 | 62 | — | 94 | — | 75 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 361 | 0 | 28 | 32 | 26 | 23 | 109 | 95 | 95 | 32 | 28 | 9 | 0 | 0 | 0 | 28 | 0 | 0 | 28 | 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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