
Surf Forecasts:
Balneario Sao Jose surf forecast from 14 Sep 2026:
- Best quality surf: Friday 18 Sep, 3AM (local time) - 3.5ft (1.1m), 13s period, S swell with glassy winds.
- Most powerful swell: Sunday 20 Sep, 6AM (local time) - 6ft (1.9m), 9s period, ESE swell with 560 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 3PM (local time) - 3ft (0.9m), 9s 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 Tuesday (Sep 15) at 3PM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.5m 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 1.9m 9s and forecast to arrive on Sunday (Sep 20) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Tue 15th Sep) | 3ft (0.9m) 9s |
| Best Surf | 3AM (Fri 18th Sep) | 3.5ft (1.1m) 13s |
| Most Powerful | 6AM (Sun 20th Sep) | 6ft (1.9m) 9s |
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 in store for the local stretch.
We’re looking at a pretty slow start for Balneario Sao Jose over the next few days. The beginning of the week is pretty grim, with a 4ft SSE swell but it’s short period, at 7 seconds, and the wind is a cross-on from the ESE at 6 mph. The combined swell energy is weak, sitting at 281. The water temp is hovering around 71°, which is about a touch warmer than normal for this time of year. Honestly, the first few days are a write-off.
Tuesday afternoon offers a brief moment of calm – it goes glassy, with a 3ft S swell (9 sec period), but it’s weak energy (197). It’s surfable but nothing to write home about. Wednesday morning stays glassy with a tiny 2ft S swell (133 energy). Still very ordinary.
There’s a gap of poor, choppy conditions from Wednesday afternoon through Thursday with onshore winds and some bigger but messy 4ft S swells. It’s just not worth paddling out.
Here’s the good news.
The first real standout is Friday the 18th of September. We get a clean, glassy morning with a 3ft S swell – but here’s the kicker, the period is 12 seconds. That’s proper groundswell energy, and the combined energy jumps to 476. This is the first genuine chance for some clean lines. It’s a beach/pier setup, so that longer period might make it a little straight, but with glassy conditions it’ll be clean enough. Expect crowds to be likely, as this is a fairly consistent spot.
The second standout, and probably the best on offer, lands on Sunday the 20th of September. The morning brings a clean 6ft ESE swell with a cross-off wind from the NNE at 9 mph. Combined energy is a solid 532. This is proper size, right on the edge of being too much for beginners at 6ft. The direction is a match for the optimum swell direction of SE. It’s clean, with some power behind it. That morning session is the one to aim for.
We also have a promising window on Thursday the 24th of September with a glassy morning and a 5ft S swell (9 seconds) and a strong combined energy of 518. That’s another very good option, particularly if you prefer a slightly smaller, cleaner wave.
The second week tails off quickly. Friday the 25th has a glassy 3ft S swell (300 energy), but it’s smaller. After that, from Saturday the 26th, we drop off into tiny, weak swell (down to 61 energy by Sunday) with no real power. It’s just small, glassy dribble. The forecast then tries to pick back up around Monday the 28th with a 4ft SSE swell, but it’s already looking poor with a cross-on wind.
So, in short: don't bother until Friday the 18th. Saturday the 19th is okay, but Sunday the 20th is your real target. Get on it.
Rusty.
Short Range ForecastHeavy rain (total 28mm), heaviest during Mon afternoon. Very mild (max 19°C on Wed morning, min 16°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 25mm), heaviest during Sat night. Warm (max 21°C on Fri morning, min 18°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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 7 | SSE 7 | S 11 | S 10 | S 9 | SSE 8 | S 10 | S 12 | S 9 | S 12 | S 11 | S 14 | S 12 | E 7 | E 7 | E 8 | E 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 |
Wave Graph | |||||||||||||||||||||
160 | 114 | 235 | 143 | 134 | 127 | 71 | 177 | 198 | 505 | 389 | 467 | 270 | 247 | 427 | 329 | 453 | 509 | 516 | 413 | 311 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | glassy | glassy | glassy | on | cross-on | cross-on | cross-on | cross | glassy | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-off | glassy |
High Tide | 3:55PM1.19m | 4:18AM1.27m | 4:17PM1.13m | 4:51AM1.16m | 4:39PM1.06m | 5:28AM1.03m | 5:04PM0.97m | 6:17AM0.89m | 5:37PM0.86m | 7:48AM0.78m | 1:15PM0.85m | 6:59PM0.75m | 1:00PM0.94m | 11:53PM0.78m | |||||||
Low Tide | 9:46AM0.24m | 9:38PM0.18m | 9:59AM0.35m | 9:59PM0.20m | 10:11AM0.46m | 10:21PM0.26m | 10:20AM0.56m | 10:43PM0.36m | 10:21AM0.67m | 11:04PM0.49m | 9:52AM0.76m | 5:00PM0.73m | 11:23PM0.63m | 4:39AM0.47m | 5:52PM0.61m | ||||||
6:03 | — | — | 6:03 | — | — | 6:01 | — | — | 6:01 | — | — | 6:00 | — | — | 5:58 | — | — | 5:58 | — | — | |
— | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | |
mm | 4 | 11 | 7 | — | 1 | — | 1 | 2 | 2 | 2 | — | 1 | — | 1 | 1 | 3 | 3 | 14 | 1 | 1 | — |
Temp °C | 18 | 18 | 17 | 18 | 18 | 17 | 19 | 19 | 18 | 18 | 18 | 18 | 21 | 20 | 19 | 21 | 20 | 20 | 25 | 25 | 24 |
Feels °C | 19 | 19 | 18 | 18 | 20 | 18 | 19 | 19 | 17 | 17 | 17 | 17 | 22 | 21 | 20 | 23 | 21 | 21 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SSE 7 | SSE 7 | S 11 | S 10 | S 9 | SSE 8 | S 10 | S 12 | S 9 | S 12 | S 11 | S 14 | S 12 | SSE 11 | S 10 | S 10 | S 9 | SSE 9 | ESE 9 | ESE 9 | ESE 9 |
160 | 114 | 235 | 143 | 134 | 127 | 71 | 177 | 198 | 505 | 389 | 467 | 270 | 198 | 98 | 67 | 43 | 27 | 516 | 413 | 311 | |
Swell 2 Height (m) Direction Period (s) | ESE 8 | S 12 | SE 9 | SSE 9 | SE 8 | E 7 | ESE 7 | E 7 | ESE 8 | ESE 11 | ESE 10 | SSE 13 | — | — | — | S 15 | S 14 | SSE 11 | SSE 9 | S 12 | S 11 |
24 | 73 | 79 | 50 | 34 | 26 | 29 | 26 | 21 | 12 | 20 | 295 | — | — | — | 4 | 14 | 25 | 16 | 25 | 10 | |
Swell 3 Height (m) Direction Period (s) | SSE 13 | SE 9 | E 5 | ESE 6 | E 8 | SE 8 | SE 8 | ESE 12 | ESE 10 | SE 8 | — | — | — | — | — | — | — | S 14 | — | S 8 | S 8 |
33 | 22 | 15 | 11 | 29 | 3 | 33 | 14 | 11 | 9 | — | — | — | — | — | — | — | 14 | — | 1 | 1 | |
Wind waves Height (m) Direction Period (s) | SE 7 | — | — | — | — | — | — | SE 8 | ESE 5 | ESE 5 | E 5 | E 6 | E 7 | E 7 | E 7 | E 8 | E 8 | ESE 8 | — | — | — |
64 | — | — | — | — | — | — | 48 | 36 | 47 | 78 | 190 | 206 | 247 | 427 | 329 | 453 | 509 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 32 | 35 | 28 | 28 | 0 | 0 | 0 | 253 | 95 | 95 | 32 | 9 | 0 | 28 | 26 | 0 | 28 | 0 | 0 | 0 | 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.










