Surf Forecasts:
Balneario Sao Jose surf forecast from 13 Aug 2026:
- Best quality surf: Monday 17 Aug, 12AM (local time) - 7.5ft (2.3m), 8s period, E swell with glassy winds.
- Most powerful swell: Thursday 13 Aug, 12PM (local time) - 5ft (1.6m), 15s period, SSE swell with 1,063 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 12AM (local time) - 5ft (1.5m), 14s 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 Friday (Aug 14) at 12AM. The primary swell is predicted to be 1.5m and 14s period with a secondary swell of 0.3m and 5s. 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 15s and forecast to arrive on Thursday (Aug 13) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Saturday (Aug 15) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 14th Aug) | 5ft (1.5m) 14s |
| Best Surf | 12AM (Mon 17th Aug) | 7.5ft (2.3m) 8s |
| Most Powerful | 12PM (Thu 13th Aug) | 5ft (1.6m) 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 cooking for Balneario Sao Jose over the next couple of weeks.
Alright, so the pattern across the whole run is a bit of a mixed bag, but there are a couple of windows of real promise. The water temp here is sitting at 70°, which is a touch warmer than normal for this time of year – not a major shift, but nice to feel that extra bit of warmth on your skin.
For the best of the best, you’ve got to circle Thursday, August 27th. The morning is the absolute standout window. We’re looking at a clean 6ft swell from the SSE with a solid 14-second period. That's a proper groundswell with some good energy behind it (combined energy of 1582). And the wind? Dead calm, glassy. You won’t find conditions much cleaner than that. The only thing to note is that at 6ft, that’s getting into the territory where it’s a bit much for the rookies, so more for the crew who know what they’re doing. The other strong shout is the very start of the run. Thursday, August 13th morning kicks things off with a nice 4ft swell from the south, 12-second period, glassy, and the water is that touch warmer than normal. Combined energy of 751 – decent punch for the size. This is a great window to get a score early on.
Let’s walk through it day by day. Thursday morning, the 13th, is clean and fun as I said. By the afternoon, the wind picks up a little and the conditions get a bit questionable. Friday morning the 14th looks clean again with a 4ft S swell, a good runner. Friday arvo, the onshores ruin it a bit. Saturday the 15th morning has a bit of size – 7ft from the SE – but the wind is cross-onshore, and the conditions are marginal. Not worth the battle. Sunday the 16th has a small glassy window in the morning, but that swell is short-period from the ESE (8 seconds), really weak and crumbly.
The first full week is a bit of a grind. A few clean mornings (Monday 17th, Tuesday 18th) with smaller, weak swell in the 3ft to 5ft range, but nothing to write home about. From Wednesday the 19th through to Monday the 24th, things turn pretty poor – lots of onshore winds, short periods, and small waves. We’re talking a solid six-day stretch where it’s really not worth paddling out. The energy levels drop right off (combined energy values hanging around 115 to 452).
Then things get interesting again towards the end. On Tuesday, August 25th, we see a pulse of size—7ft from the S, but with rain showers and a cross-on wind, it’s messy. The real gem is that Thursday the 27th morning I mentioned. Classic clean, head-high plus SSE groundswell. The combined energy of 1582 tells you there’s plenty of push. Friday the 28th morning also looks tidy with a 6ft swell from the ESE and clean, offshore wind, but the period is a short 8 seconds, so it’ll be a bit fat and quick.
To sum it up: the two main standouts to lock in are Thursday morning, August 13th for a clean, fun-sized session, and the absolute pick of the litter, Thursday morning, August 27th, for some excellent, glassy, solid groundswell. The rest of the days are mostly small, onshore, or just not worth getting wet for.
Stay frothy.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Thu morning, min 18°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 35°C on Tue morning, min 18°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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 | SSE 15 | S 14 | S 13 | SSE 13 | SSE 14 | SSE 13 | S 12 | ESE 7 | ESE 8 | ESE 8 | E 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | E 8 | S 7 | SE 7 |
Wave Graph | |||||||||||||||||||||
425 | 1021 | 849 | 564 | 690 | 1004 | 692 | 359 | 284 | 450 | 460 | 737 | 388 | 343 | 237 | 238 | 193 | 115 | 63 | 89 | 174 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | glassy | on | cross | cross | cross | cross | glassy | cross-on | glassy | glassy | cross-on | cross-off | cross-off | cross-off | cross | cross-on | cross-on | glassy |
High Tide | 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 | 5:59AM1.03m | 5:50PM0.95m | ||||||||
Low Tide | 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 | 11:03AM0.55m | 11:23PM0.42m | |||||||
6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | |
— | 5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 24 | 19 | 21 | 21 | 20 | 22 | 21 | 20 | 24 | 23 | 20 | 25 | 24 | 24 | 35 | 35 | 30 | 20 | 19 | 19 |
Feels °C | 25 | 26 | 20 | 23 | 22 | 22 | 22 | 20 | 22 | 25 | 25 | 23 | 27 | 26 | 26 | 35 | 35 | 29 | 20 | 19 | 22 |
Swell 1 Height (m) Direction Period (s) | S 12 | SSE 15 | S 14 | S 13 | SSE 13 | SSE 14 | SSE 13 | S 12 | SSE 12 | ESE 8 | S 11 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | S 6 | S 7 | SE 13 |
425 | 1021 | 849 | 564 | 690 | 1004 | 692 | 359 | 224 | 335 | 86 | 434 | 388 | 343 | 237 | 238 | 193 | 115 | 54 | 89 | 7 | |
Swell 2 Height (m) Direction Period (s) | SSE 15 | E 5 | E 5 | E 6 | E 8 | E 9 | — | — | SE 13 | SSE 11 | — | S 11 | S 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | S 10 | E 8 | E 8 | SE 13 |
312 | 9 | 5 | 5 | 6 | 6 | — | — | 6 | 126 | — | 83 | 54 | 35 | 20 | 19 | 9 | 8 | 63 | 45 | 7 | |
Swell 3 Height (m) Direction Period (s) | E 5 | — | — | — | — | — | — | — | — | ESE 13 | — | — | — | — | — | SE 9 | — | S 8 | S 9 | SE 14 | S 11 |
14 | — | — | — | — | — | — | — | — | 17 | — | — | — | — | — | 3 | — | 1 | 7 | 7 | 2 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | ESE 6 | ESE 6 | ESE 7 | ESE 8 | ESE 8 | E 8 | — | — | — | — | — | SW 4 | — | — | SE 7 |
— | — | — | — | — | — | 142 | 273 | 284 | 450 | 460 | 737 | — | — | — | — | — | 23 | — | — | 174 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 51 | 0 | 0 | 213 | 26 | 32 | 91 | 19 | 0 | 28 | 0 | 0 | 100 | 0 | 0 | 0 | 48 | 50 | 135 | 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.











