Monabe Rivermouth Surf Forecast and Surf Report

Righto, let's have a look at what's cooking. Mostly, it’s a quiet story for Monabe Rivermouth. This spot rarely breaks, so any run of waves is something, but the next 16 days are a mixed bag of promise and letdown. The water is a balmy 86°F—much warmer than normal for this time of year, and that's a real treat if you're in the water.

The first real window kicks off Friday, 4th September. Morning has a glassy feel with a south swell at 6ft and a period of 10 seconds. The combined energy is 819—moderate, and there's a risk of thunderstorms, but with near-calm winds, it’ll be clean. That afternoon, the wind swings offshore from the NNW, cleaning up the 6ft swell, but heavy rain is on the cards. It's surfable, but you'll be dodging raindrops.

Saturday, 5th September, sees the swell drop a touch and switch to a short-period east windswell at 6ft to 5ft. The period is only 7 seconds, so the waves will be a bit weak and lumpy. Light offshore winds in the afternoon keep it clean-ish, but it's very ordinary. The combined energy is sitting around 261–299.

Sunday, 6th September, is the standout peak of the entire forecast. The morning brings a solid 10ft east swell with a better 9-second period, and the combined energy jumps right up to 1406—that’s strong. Winds are light offshore, so it should be holding some decent shape. By the afternoon, the swell hits 12ft from the east with a 10-second period and the energy rockets to 2265. That’s very strong. A steady 9 mph offshore breeze from the north should groom it into proper, powerful lines. This is for experienced surfers only—it’s too big for beginners.

Monday, 7th September, the swell backs off to a 6ft southeast groundswell in the morning, with a 10-second period, and the energy sits at 1087. Light offshore winds keep it clean. The afternoon drops to 5ft and the energy fades to 769—ordinary again.

Tuesday, 8th September, offers small but tidy 4ft south swell with a long 11-second period. It’s glassy both morning and afternoon. The combined energy is 697, which is moderate, but at a river mouth like Monabe, a long-period south swell can be a bit straight and fast. It’s a gamble.

From Wednesday, 9th September, through the rest of the period, it’s mostly small and weak. The swell drops below 3ft with periods of 8 seconds or less, and combined energy falls under 300 most days. There are a few glassy mornings, but the waves are tiny. The water will stay warm and the conditions look nice for a paddle, but don’t expect to get many waves.

The biggest truth here is that the real action is Sunday, 6th September. That’s the day. The morning is solid and clean, the afternoon is powerful and heavy. If you’re experienced and keen, that’s your window. The rest of the forecast is mostly a waiting game.

Rusty.

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