Onrus Surf Forecast and Surf Report

Alright, this is Rusty. Let’s break it down. The next two weeks have a bit of everything, but you gotta pick your moments. The clean windows with decent swell are the ones to chase.

We start on Thursday, 27 August, at Onrus (reef, intermediate spot). Morning has some clouds, but the wind is dead glassy out of the NW at just 3 mph. There’s a solid 5ft S swell with a clean 12-second period and combined energy at a moderate 781. Water temp is 59°, pretty average for this time of year. This is a very good session to get on it, and crowds are only sometimes an issue. Thursday afternoon stays nice with a cross-off breeze and 5ft from the SSW.

Friday, 28 August, stays clean. Morning glass again, swell drops slightly to 4ft from the SW, energy at 493, still good quality. The afternoon shifts: glassy wind, smaller 3ft swell from the WSW but with a longer 14-second period, bumping energy to 516. That longer period means better shape, and the reef will like it.

Saturday, 29 August, starts promising with light rain, cross-off wind, and a 4ft WSW groundswell at 13 seconds – energy at 705, a very good look. But by the afternoon, the wind swings onshore from the SW at 12 mph and the swell jumps to 6ft. Cross-chop will ruin it. Energy reads 1868, but it’s messy. Skip it.

Sunday, 30 August, has building swell and poor wind: 8ft from the WSW in the morning with onshore wind – not worth it. Afternoon sees 7ft from the SW, cross-onshore, still messy.

Monday, 31 August, is a return to form. Morning brings 6ft from the SW, 11 seconds, cross-off wind at 9 mph from the WNW, energy at 828. Very good and clean. Afternoon stays clean but wind picks up to 12 mph, so it’s a bit more work.

Tuesday, 1 September, gets serious. Morning has 8ft SW groundswell at 12 seconds, with a fresh offshore wind out of the NW at 19 mph. Energy is pumping at 1848. This is for experienced surfers only – too big for beginners. The offshore breeze will groom it, but it’s powerful. Afternoon holds similar size with cross-off wind.

Wednesday, 2 September, is a beast. Swell hits 15ft from the SW with a 16-second period – very long period groundswell. Combined energy is 9652, huge. But the wind is cross, and this is too big for Onrus. The reef will be dangerous. Even experts should sit this one out. Afternoon same story at 13ft.

From Thursday, 3 September through Saturday, 5 September, conditions go bad. Onshore winds 22-25 mph, short-period junk, poor surf. Don’t bother.

Sunday, 6 September, offers a glimmer: 3ft SW groundswell at 16 seconds and light wind, but energy is moderate (700). Afternoon cross-onshore kills it.

Monday, 7 September afternoon, is a standout in the second week. Glassy wind, 5ft SE swell at 9 seconds (short period, punchy), energy at 847. Very good and clean – a solid session for any intermediate.

Tuesday, 8 September, morning glass again, 3ft SW at 14 seconds, clean but smaller. Good, not great.

Wednesday, 9 September, offers consistent clean lines: 3ft SW at 12-13 seconds, light cross-off wind. Steady surf.

Thursday, 10 September, is small and wind-affected – skip it.

But Friday, 11 September, is the real gem in the second week. Morning: 6ft SW groundswell at 13 seconds, light cross-off wind, combined energy of 1232. Excellent for experienced surfers. Afternoon holds similar size and quality with a slight cross-shore ripple. This is the best session in the latter half – clean, solid, and worth planning for.

So the best on offer is Thursday, 27 August morning at Onrus for the glass and clean 5ft S swell, and Friday, 11 September morning for that 6ft SW groundswell with light offshore conditions. The middle of the forecast has a big, ugly swell event, so pick your windows.

Stay safe, read the tides, and don’t be a hero on that 15ft day.

Rusty.

Read more