Surf Forecasts:
Balneario Sao Jose surf forecast from 17 Aug 2026:
- Best quality surf: Monday 17 Aug, 3AM (local time) - 6.5ft (2.0m), 8s period, E swell with glassy winds.
- Most powerful swell: Monday 24 Aug, 3AM (local time) - 5.5ft (1.7m), 12s period, S swell with 827 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 3AM (local time) - 6.5ft (2.0m), 8s period with E 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 17) at 3AM. The primary swell is predicted to be 2.0m and 8s period with a secondary swell of 1.7m and 8s. Another secondary swell of 0.6m and 10s 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 1.7m 12s and forecast to arrive on Monday (Aug 24) at 3AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 17th Aug) | 6.5ft (2.0m) 8s |
| Best Surf | 3AM (Mon 17th Aug) | 6.5ft (2.0m) 8s |
| Most Powerful | 3AM (Mon 24th Aug) | 5.5ft (1.7m) 12s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Righto, this is Rusty, and I’m looking straight at what’s on offer for Balneario Sao Jose, a beach and pier setup that’s exposed to the swell. If you’re a beginner, keep in mind that when that swell ticks over about 5 feet, it starts getting a bit much, and anything over 8 feet is strictly for the experienced crew.
The real standout here is Monday the 17th of August – it’s the best of the whole run. The morning is a beauty, with a clean 5 ft swell from the ESE and a glassy, no-wind surface. That’s proper clean surf, no crowds to worry about if you get in early. The water temp is about what you’d expect for this time of year, nothing weird going on.
After that, Tuesday the 18th is worth a look too. The morning glass-off with a 4 ft ESE swell will be fun and clean, though it’s a step down in size.
Wednesday the 19th, the swell drops off to 3 ft, and the period is short – only 7 seconds – so it’ll be weak and a bit mushy. Still, with no wind in the morning, you could get a couple, but it’s ordinary. The energy (76) is weak, so don’t expect much push.
There’s a real dry spell from Thursday the 20th all the way through to Saturday the 22nd of August. The swell is tiny and winds are messy. Saturday morning though, things perk up again: a glassy 4 ft from the south with a longer 9-second period, and the energy sits at a moderate 261. That’s a decent morning session.
Sunday the 23rd has a bump in size by the afternoon – 6 ft from the south – but the wind is onshore and there’s light rain. It’s messy, but the energy jumps to 547, so there’s power there. Not the best quality, but if you’re desperate, you’ll find something.
Now, Monday the 24th of August brings the biggest swell of the forecast: a 7 ft south groundswell with a long 12-second period. The energy is very strong (2326). But the wind is onshore and it’s raining. This is going to be a beast – only for experts who know the rip and don’t mind a bit of rain. The period is long, so at this beach break it might break a bit straight, but there’ll be plenty of grunt.
The rest of the week into the end of August and start of September is a mixed bag of small swells, onshore winds, and poor conditions. The morning of Thursday the 27th is the next cleanish window – a 4 ft south swell with no wind, glassy. That’s a good call for a quiet paddle. And then Monday the 31st of August morning also looks tidy: a 3 ft SSE swell, glassy, with moderate energy.
Overall, don’t expect much consistency. It’s a run of a few days with no good surf, but when it’s on, it’s on. Keep an eye on that Monday the 17th, and that Saturday the 22nd morning.
Rusty.
Short Range ForecastMostly dry. Warm (max 30°C on Wed morning, min 19°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Thu morning, min 16°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | ESE 8 | E 7 | E 7 | E 8 | E 6 | E 8 | ESE 8 | E 8 | S 9 | S 9 | S 10 |
Wave Graph | |||||||||||||||||||
565 | 318 | 238 | 192 | 202 | 167 | 94 | 73 | 75 | 54 | 37 | 54 | 178 | 121 | 109 | 64 | 230 | 146 | 196 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | on | glassy | glassy | cross-on | cross-off | glassy | on | glassy | glassy | cross | cross-off | cross-on | on | glassy | glassy | on | cross |
High Tide | 4:44AM1.27m | 5:00PM1.10m | 5:19AM1.16m | 5:24PM1.03m | 5:59AM1.03m | 5:50PM0.95m | 6:51AM0.89m | 6:25PM0.85m | 8:30AM0.79m | 1:28PM0.82m | 7:40PM0.75m | 1:16PM0.93m | 00:01AM0.78m | ||||||
Low Tide | 10:08PM0.32m | 10:39AM0.32m | 10:29PM0.32m | 10:52AM0.43m | 10:54PM0.35m | 11:03AM0.55m | 11:23PM0.42m | 11:06AM0.67m | 11:57PM0.52m | 10:28AM0.77m | 5:16PM0.72m | 5:01AM0.47m | 6:21PM0.62m | ||||||
— | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:26 | — | — | |
— | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | — | 5:51 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 25 | 24 | 22 | 29 | 27 | 26 | 30 | 28 | 23 | 28 | 28 | 26 | 24 | 21 | 18 | 19 | 20 | 18 |
Feels °C | 22 | 27 | 26 | 25 | 30 | 28 | 27 | 30 | 29 | 24 | 28 | 29 | 26 | 24 | 20 | 17 | 19 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | ESE 8 | E 7 | E 7 | S 11 | E 6 | E 8 | ESE 8 | S 6 | S 9 | S 9 | S 10 |
427 | 318 | 238 | 192 | 202 | 167 | 94 | 73 | 75 | 54 | 37 | 9 | 86 | 121 | 109 | 57 | 230 | 146 | 196 | |
Swell 2 Height (m) Direction Period (s) | SSE 11 | SSE 10 | S 10 | SSE 10 | SSE 9 | SSE 9 | S 10 | S 8 | S 9 | SE 13 | SW 4 | S 8 | S 10 | S 9 | S 15 | E 8 | E 8 | E 8 | E 7 |
88 | 82 | 52 | 33 | 17 | 8 | 2 | 1 | 2 | 7 | 1 | 5 | 17 | 24 | 4 | 64 | 31 | 18 | 9 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | S 11 | S 8 | S 10 | SE 13 | S 9 | S 12 | SW 4 | S 7 | — | — | S 8 | — | — | S 15 |
— | — | — | — | — | 2 | 1 | 2 | 7 | 2 | 3 | 1 | 8 | — | — | 1 | — | — | 4 | |
Wind waves Height (m) Direction Period (s) | E 8 | — | — | — | — | — | — | — | SSW 2 | — | — | E 8 | E 6 | SSW 3 | S 6 | — | — | — | SE 4 |
565 | — | — | — | — | — | — | — | 1 | — | — | 54 | 178 | 2 | 109 | — | — | — | 8 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 66 | 0 | 0 | 32 | 0 | 0 | 75 | 0 | 9 | 59 | 0 | 47 | 175 | 0 | 0 | 410 | 28 |
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.











