Balneario Sao Jose Surf Forecast and Surf Report

Alright folks, it’s Rusty here. Let’s have a look at what’s on the cards for Balneario Sao Jose over the next couple of weeks. Straight up, it’s a mixed bag. We’ve got a few clean windows, but a lot of chop and cross-onshore slop to wade through too. The first proper surfable day is Saturday morning, August 29, so we’re starting right away.

Saturday, August 29 kicks off with a clean, light offshore breeze from the NNW. Swell is small at 3ft from the E, period a short 7 seconds, so it’s a bit weak and wobbly, but it’s rideable. The combined energy is moderate (128). The water is sitting at 70°, which is a touch warmer than normal for this time of year—a nice little bonus for the first session. Afternoon turns a bit cross-off, still clean-ish but smaller at 3ft. Nothing special, but it’s a start.

Sunday, August 30 is a write-off. The wind swings cross-on and the swell drops to 2ft. Poor conditions all day.

Monday, August 31 morning is a highlight. Glassy as glass, wind from the E at just 3 mph. Swell is tiny at 2ft, but if you’ve got a log, it’s worth a paddle. The combined energy is weak (66). The afternoon goes downhill again with a cross-on wind.

Tuesday, September 1 sees a return of offshore wind, this time from the N. Swell bumps up to 4ft from the S, period still short at 6 seconds, but it’s clean. Energy is moderate (152). The afternoon holds offshore with a little more energy (177). Not great waves, but clean.

Wednesday, September 2 is a big pass. Swell jumps to 6ft with moderate energy (417), but it’s a cross-on mess from the SSW with 12 mph winds. Choppy and ugly. The afternoon gets bigger at 7ft, period 10 seconds, and energy up to 905—strong wave energy, but the wind ruins it. This setup is more interesting for kite surfing than paddle surfing.

Thursday, September 3 is the real standout. The morning is glassy, wind from the ENE at 3 mph. Swell sits at 5ft from the SSE, period 9 seconds, with moderate energy (349). Clean, solid, and fun. This is the best on offer in the whole outlook. The afternoon still has decent waves but the wind goes cross-on, so it’s not as good.

Friday, September 4 morning: dead calm, glassy, wind from the S at 0 mph. Swell is 4ft from the SE, period 10 seconds, energy 251. Clean, lined-up conditions. Worth a dawny.

Saturday, September 5 through Sunday, September 6 is poor. Cross-on wind, dropping swell, and rain. Not worth it.

Monday, September 7 morning: a solid 8ft southerly swell, period 11 seconds, strong energy (1413). But the wind is cross-on from the S at 9 mph. That’s a lot of power, but it’s going to be messy. Only for the experienced, and even then, expect chop.

Tuesday, September 8 morning: clean cross-shore wind from the E at 9 mph. Swell 4ft from the S, a long 13-second period, energy 674. That’s a proper groundswell, but at a beach break like Balneario, that long period can make it break a bit straight. Still, it’s a decent option for those who know the bank.

Wednesday, September 9 is cross-shore but messy.

Thursday, September 10 morning: another glassy gem. Calm as, wind SW at 0 mph. Swell 4ft from the ESE, period 9 seconds, energy 355. Clean, workable, and the last real standout before the window closes.

Friday, September 11 to Sunday, September 13 the surf fades back to small, messy, or weak. The 13th sees a brief glassy moment in the afternoon with 2ft, but it’s a long way out.

So, the best bets: Thursday, September 3 morning for the glassy 5ft SSE swell, and Thursday, September 10 morning for another glassy session. If you’re keen on a long-period groundswell, Tuesday, September 8 morning is worth a look despite the caveat. Keep an eye on the wind, and don’t bother with the middle of the week slop.

Rusty.

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