Surf Forecasts:
Balneario Sao Jose surf forecast from 10 Sep 2026:
- Best quality surf: Monday 14 Sep, 9AM (local time) - 7.5ft (2.3m), 8s period, ESE swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 9AM (local time) - 5ft (1.6m), 12s period, SSE swell with 701 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 9AM (local time) - 2.5ft (0.8m), 12s 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 Thursday (Sep 10) at 9AM. The primary swell is predicted to be 0.8m and 12s period with a secondary swell of 0.8m 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 1.6m 12s and forecast to arrive on Thursday (Sep 17) at 9AM. 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+) | 9AM (Thu 10th Sep) | 2.5ft (0.8m) 12s |
| Best Surf | 9AM (Mon 14th Sep) | 7.5ft (2.3m) 8s |
| Most Powerful | 9AM (Thu 17th Sep) | 5ft (1.6m) 12s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, Rusty here again, looking at Balneario Sao Jose.
Water temp is about 71°, a touch warmer than normal for this time of year – just a bit more comfortable than average.
Thursday morning the 10th kicks off with a little window of clean surf. Swell is 3ft from the south, 12-second period, glassy conditions. Combined energy is 263 – decent push for the size. By afternoon the wind goes cross-onshore and it’s over.
Friday the 11th morning is clean again with the same 3ft south swell, a little more period at 13 seconds, and light cross-offshore wind. Small, but clean.
From Friday afternoon through the weekend, it gets choppy. Saturday the 12th period drops to 6-7 seconds, energy down to 104, mostly bumpy. Sunday the 13th bumps up to 6ft from the SSE but with short 9-second period and onshore wind – messy.
The real standout is Monday the 14th. That morning brings 8ft from the ESE, period 8 seconds, combined energy at 699 – that’s a serious pulse. Light cross-offshore wind keeps it clean. Monday afternoon goes glassy, still 7ft from the SE, energy at 724. That is the best of the whole 16 days. Size is for experienced surfers only – beginners should sit it out. Expect a crowd, as this spot is often busy.
After Monday, Tuesday the 15th drops to 4ft and wind turns cross-onshore – marginal.
Friday the 18th morning is another clean, glassy session with 4ft south swell and a long 13-second period, energy at 562. Good smaller option. Saturday the 19th afternoon has 2ft from the SSE but a very long 15-second period, light cross-offshore, clean lines.
From Sunday the 20th, it fades. A run of poor, onshore conditions from the 21st to the 24th. By the 25th, a bump to 5ft from the east but with cross-onshore wind – better for kite surfing than a paddle.
Your best bet: Monday the 14th for power and clean conditions. Friday the 18th for a cleaner, smaller alternative.
Rusty.
Short Range ForecastHeavy rain (total 71mm), heaviest during Thu afternoon. Warm (max 27°C on Fri afternoon, min 17°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 60mm), heaviest during Sun afternoon. Warm (max 21°C on Tue morning, min 17°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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) | S 12 | S 12 | S 15 | S 13 | S 12 | E 6 | E 7 | S 9 | S 9 | SSE 9 | SSE 9 | SSE 8 | ESE 8 | SE 8 | ESE 8 | ESE 8 | ESE 8 | SSE 9 | SE 8 | SE 8 | ESE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 180 | 199 | 161 | 225 | 151 | 112 | 52 | 123 | 349 | 436 | 405 | 245 | 654 | 567 | 287 | 161 | 125 | 237 | 151 | 151 | 98 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | glassy | glassy | cross | cross-on | glassy | on | on | cross-on |
High Tide | 2:29PM1.30m | 2:13AM1.38m | 2:51PM1.30m | 2:44AM1.43m | 3:12PM1.27m | 3:15AM1.42m | 3:34PM1.24m | 3:47AM1.36m | 3:55PM1.19m | 4:18AM1.27m | 4:17PM1.13m | 4:51AM1.16m | 4:39PM1.06m | ||||||||
Low Tide | 8:39PM0.31m | 8:54AM-0.01m | 8:54PM0.27m | 9:15AM0.05m | 9:07PM0.23m | 9:32AM0.14m | 9:21PM0.19m | 9:46AM0.24m | 9:38PM0.18m | 9:59AM0.35m | 9:59PM0.20m | 10:11AM0.46m | 10:21PM0.26m | ||||||||
 |  |  |  |  |  | | |  |  | | | | | |  | | | | |  | |
 | 6:07 | — | — | 6:07 | — | — | 6:05 | — | — | 6:05 | — | — | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — |
 | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — |
mm | 3 | 19 | 8 | 5 | — | 7 | 3 | 3 | 23 | 9 | 18 | 13 | 4 | 6 | 9 | — | — | 1 | 2 | 1 | 3 |
Temp °C | 23 | 21 | 21 | 26 | 27 | 26 | 22 | 19 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 21 | 19 | 18 | 19 | 18 | 18 |
Feels °C | 27 | 23 | 23 | 28 | 29 | 29 | 23 | 19 | 19 | 18 | 18 | 17 | 20 | 21 | 20 | 22 | 19 | 20 | 18 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | ESE 5 | ESE 8 | S 12 | E 6 | E 7 | S 9 | S 9 | SSE 9 | SSE 9 | SSE 8 | SSE 14 | SE 8 | ESE 8 | ESE 8 | ESE 8 | SSE 9 | SE 8 | SE 8 | S 7 |
| kJ | 180 | 199 | 39 | 75 | 151 | 64 | 52 | 102 | 349 | 436 | 405 | 245 | 36 | 567 | 287 | 161 | 125 | 237 | 151 | 151 | 56 |
Swell 2 Height (m) Direction Period (s) | ESE 8 | E 7 | S 12 | S 13 | SE 13 | S 12 | S 11 | E 7 | E 8 | ESE 8 | ESE 8 | S 16 | S 11 | S 12 | S 12 | S 11 | S 11 | ESE 8 | S 11 | S 10 | S 13 |
| kJ | 75 | 54 | 103 | 225 | 7 | 68 | 37 | 28 | 33 | 12 | 13 | 5 | 9 | 77 | 96 | 116 | 88 | 65 | 112 | 106 | 89 |
Swell 3 Height (m) Direction Period (s) | SE 14 | SSE 17 | S 15 | SE 13 | — | SE 12 | SE 12 | SE 11 | — | SE 11 | — | S 12 | — | S 12 | S 9 | SSE 9 | — | SSE 11 | ESE 8 | E 8 | S 9 |
| kJ | 8 | 56 | 161 | 7 | — | 6 | 5 | 5 | — | 5 | — | 3 | — | 80 | 25 | 49 | — | 126 | 55 | 43 | 28 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | E 8 | E 6 | S 4 | S 6 | — | — | — | E 6 | ESE 8 | — | — | SW 3 | SSW 5 | — | — | — | ESE 8 |
| kJ | — | — | — | — | 74 | 112 | 10 | 123 | — | — | — | 214 | 654 | — | — | 4 | 36 | — | — | — | 98 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 35 | 0 | 0 | 28 | 9 | 47 | 517 | 95 | 28 | 95 | 91 | 0 | 0 | 0 | 28 | 175 | 0 | 32 | 32 | 91 |
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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