Nantasket Beach Surf Forecast and Surf Report

Period: Now through early September

We start off flat. Monday the 24th has a weak 0.2m easterly swell at 11 seconds, but cross-off winds and a combined energy of just 23 make it a total non-starter. Tuesday the 25th and Wednesday the 26th are similar—tiny 0.2m to 0.4m swells. Wednesday morning is glassy, which would be beautiful if there was any surf, but there isn’t. Thursday the 27th through the 31st stays poor, with heights barely scraping 0.5m and combined energy staying under 50. The long-period groundswell that shows up on Monday the 31st afternoon (0.2m at 17 seconds) is too weak to do anything. The water is sitting at 20°, which is about normal for the time of year.

Then we hit the start of September. From the 1st to the 3rd, we finally see a bit more energy building, but the waves are still only 0.3m to 0.5m. The wind stays messy, mostly cross or onshore. On Thursday the 3rd, the combined swell energy jumps to 172, and by Friday the 4th it hits 220, with swell heights just touching 0.7m from the east at 14 seconds. That’s a moderate energy event, but it comes with strong, messy wind—35 to 40 km/h from the north and northwest. For a beach break like Nantasket, that’s a choppy, blown-out mess. Not for paddle surfing; this setup looks far more interesting for kite surfing than anything else.

Best on Offer (if you’re desperate)

Honestly, the only window that might tempt a dedicated surfer is Saturday the 5th and Sunday the 6th of September. On Saturday the 5th, we get 0.6m from the east at 12 seconds with a light north-northeast breeze in the afternoon. Combined energy sits around 147—moderate. It’s not clean, but it’s the least offensive option. Then on Sunday the 6th, the swell nudges up to 0.9m from the east at 11 seconds, with the morning showing a combined energy of 191. Winds are light from the north. It’s a beach break though, and with that mid-period east swell, it might break a bit straight and sectiony. Still, it’s the closest we get to a proper wave in the whole outlook. Don’t expect any crowd issues—more likely just a few hopefuls.

Beyond that, Monday the 7th and Tuesday the 8th fade back down to 0.4m to 0.7m with choppy onshore wind. It’s done.

So, there you have it. A long gap of flatness, one brief moment of hope on that first weekend in September, and then back to nothing. It’s one of those stretches where the area just goes quiet. Forecasts can change, but for now, keep the board in the car and the expectations low.

Rusty.

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