Surf Forecasts:
Balneario Sao Jose surf forecast from 12 Aug 2026:
- Best quality surf: Monday 17 Aug, 12AM (local time) - 7ft (2.2m), 8s period, E swell with cross-offshore winds.
- Most powerful swell: Saturday 15 Aug, 3AM (local time) - 6ft (1.8m), 13s period, SSE swell with 1,073 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 12PM (local time) - 5ft (1.6m), 12s period with SSE 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 (Aug 12) at 12PM. The primary swell is predicted to be 1.6m and 12s period with a secondary swell of 0.1m and 7s. Another secondary swell of 0.7m and 4s 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 1.8m 13s and forecast to arrive on Saturday (Aug 15) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Wed 12th Aug) | 5ft (1.6m) 12s |
| Best Surf | 12AM (Mon 17th Aug) | 7ft (2.2m) 8s |
| Most Powerful | 3AM (Sat 15th Aug) | 6ft (1.8m) 13s |
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 coming for Balneario Sao Jose over the next couple of weeks.
The first few days are a bit of a mixed bag, but we've got some solid pulses coming through, especially if you're willing to wait for the bigger stuff later on. The water is sitting at 70°F which is a touch warmer than normal for this time of year, so you might not even need a wetsuit.
Wednesday the 12th kicks off with a bit of a nothing burger. We've got 6ft swell from the SSE with a 12-second period, but that cross-shore wind from the ENE at 6 mph is putting a bit of a chop on it. Combined energy is moderate (839). Not worth paddling out for.
Thursday morning the 13th is where it gets interesting. The wind drops to dead calm, glassy conditions, and a clean 4ft swell from the S. That's a nice little window for a quiet session. The afternoon picks up to 5ft from the SSE with a long 15-second period, and winds go light offshore from the SE at 3 mph. The energy jumps to 1052 (moderate), so those waves will have some push. This is a good shout for anyone who can sneak out.
Friday the 14th is a write-off with cross-onshore winds and small, messy 4ft swell. Saturday the 15th morning is a gem – glassy conditions again, 6ft from the SSE, 13-second period, energy at 959 (moderate). That's a great morning session. The afternoon gets blown out by a 12 mph easterly, so get in early.
Sunday the 16th morning is another glassy one, with 6ft from the E but a short 8-second period. The energy is moderate (760). It'll be a bit walled-off at the beach, but with zero wind it'll be clean. The afternoon turns to junk.
Monday the 17th is calm and glassy all day, with 5ft and 5ft from the ESE, but the period is short (9 seconds) so the waves won't have much grunt. Energy is moderate (445 and 335). It's surfable, but not exciting.
Then we hit a dry spell. Tuesday the 18th through to Saturday the 22nd is mostly poor, with tiny waves, onshore winds, and rain. The swell drops to under 3ft, energy plummets into the double digits (75 to 256). Nothing worth chasing.
Sunday the 23rd things start to wake up. The morning brings 5ft from the SSE, but it's cross-onshore at 9 mph, so it's messy. The afternoon though, 7ft from the SSE with a 12-second period, energy at 1160 (strong). The wind is lighter from the E at 6 mph, but it's still cross-onshore. It's a bit of a battle, but there's push.
Now, Monday the 24th morning is a standout. Glassy conditions, dead calm, with a clean 5ft groundswell from the S, 11-second period, energy at 625 (moderate). That's a perfect window for a long, clean session. The best of the early part of the week.
But hold onto your board for Tuesday the 25th morning. This is the standout of the whole forecast. Offshore wind from the N at 6 mph, 5ft swell from the S with a very long 15-second period, and energy at 1179 (strong). That's a proper groundswell. The break is a beach/pier setup, so that long period will make the waves a bit more lined up, but it's clean and powerful. Crowds are often here, so expect company.
And then, Wednesday the 26th morning – the swell jumps to 10ft from the S, 13-second period, energy at 4435 (very strong). That's huge. The wind is glassy, but that size is for experts only. This spot is a beach/pier, so at that size it's more of a big-wave show. The afternoon drops to 8ft from the SSE, still glassy, and energy at 2345 (strong) – excellent for experienced surfers, but still a handful.
The 27th Thursday morning winds down to a clean 4ft, glassy, with a nice 11-second period. A good way to finish the run.
So, bottom line: if you want the best clean waves, go for Thursday the 13th morning or Monday the 24th morning. If you want the most power and a bigger swell, Tuesday the 25th morning is a beauty. The big 10ft day on the 26th is a monster – only for the brave.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Thu morning, min 18°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sun morning, min 19°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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) | SSE 12 | S 12 | SSE 12 | SSE 13 | SSE 15 | S 14 | S 13 | SSE 13 | SSE 13 | SSE 13 | S 12 | ESE 7 | E 8 | ESE 8 | E 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 |
Wave Graph | |||||||||||||||||||||
718 | 672 | 598 | 638 | 1035 | 849 | 564 | 572 | 958 | 995 | 425 | 365 | 517 | 322 | 659 | 388 | 336 | 232 | 294 | 206 | 118 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | glassy | glassy | on | cross | glassy | on | glassy | cross-on | cross-on | cross | glassy | cross-on | cross-off | glassy | cross-on | glassy | cross | cross-on | glassy |
High Tide | 3:01PM1.32m | 2:33AM1.30m | 3:26PM1.29m | 3:06AM1.36m | 3:50PM1.25m | 3:38AM1.38m | 4:14PM1.21m | 4:11AM1.35m | 4:37PM1.16m | 4:44AM1.27m | 5:00PM1.10m | 5:19AM1.16m | 5:24PM1.03m | ||||||||
Low Tide | 9:19PM0.40m | 9:24AM-0.05m | 9:35PM0.40m | 9:50AM0.01m | 9:45PM0.38m | 10:10AM0.09m | 9:53PM0.35m | 10:26AM0.20m | 10:08PM0.32m | 10:39AM0.32m | 10:29PM0.32m | 10:52AM0.43m | 10:54PM0.35m | ||||||||
6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | |
— | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 |
Temp °C | 19 | 21 | 19 | 25 | 24 | 19 | 20 | 20 | 20 | 22 | 23 | 21 | 25 | 23 | 20 | 25 | 24 | 25 | 22 | 19 | 19 |
Feels °C | 21 | 22 | 21 | 26 | 26 | 20 | 22 | 22 | 22 | 22 | 22 | 23 | 27 | 25 | 23 | 27 | 26 | 27 | 21 | 17 | 20 |
Swell 1 Height (m) Direction Period (s) | SSE 12 | S 12 | SSE 12 | SSE 13 | SSE 15 | S 14 | S 13 | SSE 13 | SSE 13 | SSE 13 | S 12 | SSE 11 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 |
718 | 672 | 598 | 638 | 1035 | 849 | 564 | 572 | 958 | 995 | 425 | 217 | 303 | 322 | 370 | 388 | 336 | 232 | 294 | 206 | 118 | |
Swell 2 Height (m) Direction Period (s) | E 7 | — | E 5 | E 5 | E 6 | E 6 | E 5 | E 8 | E 8 | — | — | — | S 11 | S 11 | S 11 | S 10 | SSE 10 | SSE 10 | SSE 10 | S 11 | S 10 |
1 | — | 36 | 21 | 16 | 10 | 5 | 6 | 6 | — | — | — | 114 | 85 | 59 | 56 | 35 | 20 | 10 | 9 | 7 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 5 | — | — | — | — | — | — | — | — | ESE 13 | ESE 13 | — | — | S 13 | S 12 | — | — | — |
— | — | — | 28 | — | — | — | — | — | — | — | — | 17 | 17 | — | — | 4 | 12 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | E 5 | — | — | — | — | — | — | — | E 9 | ESE 7 | ESE 7 | E 8 | — | E 8 | — | — | — | — | SW 4 | SW 4 |
— | 27 | — | — | — | — | — | — | — | 15 | 256 | 365 | 517 | — | 659 | — | — | — | — | 18 | 21 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 28 | 0 | 0 | 32 | 9 | 35 | 9 | 0 | 0 | 91 | 0 | 0 | 28 | 0 | 0 | 0 | 35 | 48 | 135 | 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.











