Surf Forecasts:
Balneario Sao Jose surf forecast from 21 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 9AM (local time) - 6ft (1.9m), 14s period, SSE swell with glassy winds.
- Most powerful swell: Monday 24 Aug, 9PM (local time) - 7ft (2.1m), 15s period, S swell with 1,963 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 6AM (local time) - 4.5ft (1.3m), 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 Sunday (Aug 23) at 6AM. The primary swell is predicted to be 1.3m and 10s period with a secondary swell of 0.2m 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 2.1m 15s 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+) | 6AM (Sun 23rd Aug) | 4.5ft (1.3m) 10s |
| Best Surf | 9AM (Tue 25th Aug) | 6ft (1.9m) 14s |
| Most Powerful | 9PM (Mon 24th Aug) | 7ft (2.1m) 15s |
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 cookin’ for Balneario Sao Jose.
Right off the bat, we’ve got a bit of a slow start. The first few days are pretty ordinary, with onshore winds and small, weak swell. Friday the 21st is a write-off. Saturday the 22nd and Sunday the 23rd are only offering marginal, onshore conditions – not worth paddling out for. The real story starts to build from Monday the 24th, when a solid pulse of long-period groundswell rolls in.
The standout is definitely going to be Tuesday morning, August 25th. We’ve got a clean 5ft groundswell from the south, with a 14-second period – that’s proper energy. The wind is dead calm, glassy as a mirror. This will be the best session of the whole window. The combined wave energy is solid at 1020, so there’s plenty of push. It’s a bit of a sneaky one, as the swell direction is coming from the south, which is an exposed beach/pier setup, so it should wrap in nicely. Keep in mind, at 5ft, this is a solid intermediate wave – not for total beginners.
Wednesday the 26th gives us another chance with glassy 4ft south swell (12-second period, 606 energy) in the morning. That’s very clean and fun. Thursday the 27th also serves up glassy 4ft early, this time from the SSE with a 13-second period (710 energy). A couple of tidy mornings there.
The water temperature is sitting at 71°F, which is about 4°F warmer than usual for this time of year – a nice little perk for your session.
Looking further out, the second week is less reliable, but we see another pulse of energy arriving around Thursday, September 4th with a solid 5ft south-southeast swell, 14-second period, and a combined energy of 1004. The wind is a cross-shore breeze, so it’ll be a bit choppy, but the swell size and period are promising for a late-season score. Saturday the 5th afternoon could clean up with glassy 4ft ESE swell, but that’s a gamble this far out.
Overall, don’t waste your time on the first weekend. Save your energy for Tuesday the 25th – that’s the one. A few clean mornings follow, and there’s a glimmer of something good in early September, but we’ll be watching that one.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Sun afternoon. Warm (max 21°C on Fri afternoon, min 17°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Wed afternoon. Warm (max 23°C on Thu morning, min 17°C on Mon afternoon). Wind will be generally light. | |||||||||||||||||||
Fri 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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 6 | S 6 | S 11 | S 10 | S 10 | S 10 | S 10 | S 13 | SSE 14 | S 13 | S 15 | SSE 14 | S 14 | S 13 | SSE 13 | SSE 13 | SSE 14 | SSE 13 | SSE 13 | SSE 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 156 | 100 | 566 | 443 | 392 | 306 | 353 | 643 | 1680 | 1465 | 1709 | 1380 | 818 | 933 | 849 | 703 | 378 | 538 | 454 | 312 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | cross | on | on | cross-on | cross-on | cross-on | cross-on | glassy | cross-on | cross-on | cross | glassy | glassy | cross | cross-on | cross-off |
High Tide | 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 | 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 | |||||||
 |  | | | | |  |  | |  | | | | | |  | |  | |  | |
 | — | — | 6:26 | — | — | 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 | 4 | 2 | — | 2 | — | 1 | 1 | 1 | 6 | — | — | — | — |
Temp °C | 21 | 19 | 18 | 19 | 18 | 20 | 18 | 18 | 17 | 17 | 18 | 20 | 20 | 19 | 20 | 19 | 20 | 23 | 23 | 21 |
Feels °C | 20 | 19 | 18 | 18 | 18 | 20 | 18 | 18 | 16 | 16 | 19 | 21 | 21 | 20 | 22 | 21 | 22 | 24 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | E 8 | S 6 | S 11 | S 10 | S 10 | S 10 | S 10 | S 13 | SSE 14 | S 13 | S 15 | SSE 14 | S 14 | S 13 | SSE 13 | SSE 13 | SSE 12 | SSE 13 | SSE 13 | E 6 |
| kJ | 55 | 100 | 566 | 443 | 392 | 306 | 353 | 643 | 1680 | 1465 | 1709 | 1380 | 818 | 933 | 849 | 703 | 298 | 538 | 454 | 104 |
Swell 2 Height (m) Direction Period (s) | — | E 8 | E 8 | E 8 | E 7 | E 7 | E 7 | E 7 | — | SSE 16 | — | — | SSE 18 | SSE 16 | E 6 | ESE 6 | SSE 14 | ESE 6 | ESE 7 | SSE 13 |
| kJ | — | 44 | 19 | 10 | 4 | 4 | 4 | 1 | — | 363 | — | — | 180 | 463 | 62 | 42 | 378 | 66 | 60 | 312 |
Swell 3 Height (m) Direction Period (s) | — | S 8 | — | — | — | — | — | — | — | — | — | — | SE 5 | — | — | SSE 16 | ESE 6 | — | — | — |
| kJ | — | 37 | — | — | — | — | — | — | — | — | — | — | 6 | — | — | 232 | 50 | — | — | — |
Wind waves Height (m) Direction Period (s) | S 6 | — | — | — | — | — | — | SE 4 | — | — | E 4 | — | E 4 | E 5 | E 6 | E 6 | E 6 | — | E 7 | E 6 |
| kJ | 156 | — | — | — | — | — | — | 16 | — | — | 5 | — | 12 | 46 | 106 | 64 | 92 | — | 110 | 158 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 356 | 32 | 32 | 32 | 26 | 23 | 95 | 95 | 95 | 28 | 28 | 0 | 32 | 19 | 9 | 0 | 0 | 19 | 28 | 0 |
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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