Ammonias Surf Forecast and Surf Report

G’day, Rusty here, and I’ve got the goods on what’s coming for Ammonias. Let’s be straight—this isn’t a clean run, but there are some windows where it’ll get interesting.

We start off with a bit of chop and cross-shore wind right through Tuesday the 1st of September. Swell’s sitting around 6 to 6 ft from the ENE with a short 8-second period, and the energy’s moderate at 895. Water temp is a warm 81°, which is pretty much standard for this time of year. Unfortunately, it’s not great—cross-wind, lumpy, and that short period won’t give you much shape.

Wednesday the 2nd through Thursday the 3rd is more of the same: rain showers, ENE swell around 7 to 8 ft, still short period around 7-8 seconds, and 15-18 mph cross-winds. Combined energy builds into the strong range (1079 to 1362), but it’s messy and choppy—honestly, not worth paddling out for anything decent.

Now, here’s where it gets a bit more interesting. Friday the 4th of September brings a shift—swell direction swings to the SSE, period jumps to 12 seconds, and the energy hits 1560. Still, the wind’s a fresh cross-shore at 18 mph, so it’s lumpy. Wave height drops to 5 ft, but that longer period means better shape underneath the mess.

Saturday the 5th shows some promise. Morning sees solid 5 ft S swell with 11-second period, clean clear skies, and cross-shore wind easing to 15 mph. Energy is strong at 1650. But the afternoon is where it could really fire: 7 ft from the ENE, period jumps to 13 seconds (very long groundswell), and energy rockets to 2492. That’s a lot of power. The caveat is those long-period groundswells can be tricky on a reef setup like Ammonias—they’re best for points and reefs, so this spot should handle it. Cross-wind at 15 mph is not ideal, but not terrible.

Sunday the 6th holds similar energy (2081) with 7 ft ENE swell and 13-second period again. Morning cross-wind at 12 mph, afternoon picks up slightly. Still marginal surf forecast, but there’s push and grunt.

Monday the 7th sees a shift to cross-onshore wind from the E at 9-12 mph, swell dropping to 7 ft, period 12 seconds. Energy stays high at 2422. The onshore component will chop it up a bit, but the swell quality is there.

Tuesday the 8th brings a big pulse—swell swings to S and SW, period hits 14-15 seconds, and energy goes massive at 2853-3262. This is serious groundswell. But the wind is onshore from the ESE, and wave heights climb to 8 ft —that’s expert territory. If you’re skilled, the power and length will be there, but the onshore wind is a killer for clean faces.

From Wednesday the 9th through the 11th, it fades back to ENE swell, shorter periods (8-10 seconds), moderate energy around 808-1358, and cross to cross-onshore winds. Nothing special.

Now, Saturday the 12th—this is the standout. Swell pumps to 10 ft from the ENE with a 9-10 second period, and combined energy is massive at 3206. That’s very strong energy. Wind stays gentle cross-onshore from the E to ENE at 9 mph—which is light enough to keep some order. This is big, powerful, and only for experts. Beginners, sit this one out.

Sunday the 13th drops off sharply: morning still 8 ft from ENE with moderate energy (1209), but by afternoon it collapses to 1 ft from the SSW with a long 15-second period and only 101 energy. That’s effectively flat.

From Monday the 14th right through to the end on Wednesday the 16th, it’s all poor surf conditions—tiny swell (1 to 3 ft), mostly cross-onshore wind, and energy under 500. Save the gas.

Best bet in the whole run: Saturday the 12th of September at Ammonias. The 10 ft ENE swell with that very strong energy (3206) and light cross-onshore breeze is the pick of the bunch. It’s a big, powerful day—experts only. The reef should hold that long-period energy well.

For a smaller but cleaner option, Saturday morning the 5th has 5 ft S swell with 11-second period, lighter cross-wind, and decent energy (1650). That’s the one for intermediate surfers.

Stay keen, but pick your windows—this forecast has more misses than hits.

Rusty

Read more