El Mongol Surf Forecast and Surf Report

Alright, Rusty here. Let’s break it down in feet and miles per hour.

We’ve got a bit of a slow start, but the real action kicks off later in the period. The first few days are okay, but nothing to get too excited about. The standout window is definitely the second weekend and into the following week.

Thursday morning, September 10th starts things off with a glassy, clean 5ft swell from the NNW at El Mongol. Combined wave energy is moderate (397). That’s a nice, clean little session to ease into. The wind is light easterly at 3 mph, so those waves will be holding up well. The water temp is about average for this time of year, so no surprises there.

Friday morning, September 11th is still clean and glassy, but the swell drops to 3ft from the NW – still fun on a log or a mid-length, but the energy is a bit lower (154). The wind is 3 mph from the east. A mellow morning.

Saturday, September 12th is a write-off – small, weak, and not worth the paddle.

Sunday morning, September 13th is where it starts to get interesting. A fresh 5ft groundswell from the NNW, with a 12-second period and a solid energy reading of 691. The wind is glassy. This is a proper session. Expect clean, lined-up waves at El Mongol. The longer period means better shape, but it’s a reef break, so it should handle that nicely.

Monday, September 14th morning is still clean with 4ft from the NNW and 314 energy – good, but not as punchy as Sunday.

Tuesday, September 15th through to Thursday, September 17th is a write-off. Onshore winds and messy lumpy conditions. The swell is there but the quality is poor. Don’t bother.

Friday morning, September 18th is a sneaky little gem. Glassy conditions, 4ft from the NNW, and 412 energy. The wind is calm. The afternoon builds to 5ft from the NNW with a 12-second period and 644 energy – still glassy. That’s a solid day.

Now, the real standout. Sunday, September 20th – the morning starts with a 3ft swell from the NNW, but what’s special is the period: 18 seconds. That’s very long-period groundswell, and the energy is already 1003. The wind is light and cross-off at 6 mph. By the afternoon, it’s a beast: 10ft from the NNW at 15 seconds, with a massive 4482 energy. This is big, clean, powerful surf. At over 8ft, this is for experienced surfers only. The wave faces will be critical, and the long period means it’ll be walling up – best on the reef, not for the faint-hearted.

Monday, September 21st is still pumping. 8ft from the NNW at 13 seconds in the morning, and 8ft in the afternoon. Energy is well over 2000. The wind is clean and cross-off. This is another day for the crew who know what they’re doing. Crowds are often at El Mongol, and with surf this good, expect plenty of company.

Tuesday, September 22nd morning still has 5ft from the NNW with 741 energy and clean cross-off wind. A good follow-up session.

After that, the swell fades. Wednesday, September 23rd onwards is small and weak, with nothing to recommend.

Overall, the best of the best is Sunday, September 20th and Monday, September 21st. If you’re an expert, that’s your window. For the average surfer, Sunday, September 13th and Friday, September 18th are your clean, fun days.

Rusty.

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