Black Rocks Jetty Surf Forecast and Surf Report

Alright folks, Rusty here. Let’s have a look at what’s coming up for Black Rocks Jetty.

We’re looking at a patchy start with a few small, clean waves, but the real standout is a pulse of serious groundswell that arrives around September 9th. That’s the one to circle on the calendar. There’s a bit of a quiet spell after that, but the last few days of the run also have some promise.

The water is sitting at 76°, which is a touch warmer than normal for this time of year, so you’ll be comfortable in a spring suit.

Thursday September 3rd kicks things off with a tiny 2 ft to 2 ft SW swell, but it’s glassy. The combined energy is weak (146), so it’s really just a chance to get wet on a log. Not worth getting excited about.

Friday September 4th sees the swell building to 5 ft SW by the afternoon, with a period of 17 seconds, but the onshore wind and moderate energy (1221) keep it from being anything special. It’s a bit of a blown-out mess.

Saturday September 5th is similar. 5 ft SW swell in the morning, dropping to 5 ft, but the onshore wind ruins the surface. The energy is still moderate (1094). Not your day.

Sunday September 6th is a nice little reprieve. 4 ft SW swell, glassy conditions, and a decent 13-second period. The energy is moderate (659). The wave comment says “expect very good surf conditions,” so this is a solid session for someone who doesn’t need big waves. Clean and fun.

Monday September 7th the swell jumps to 7 ft SSW, but the wind swings cross-onshore. The energy is strong (1776), but the surface is messy. It’s big, but not clean.

Tuesday September 8th is even bigger at 8 ft SSW, with strong energy (4121 to 5201), but the wind is cross or cross-onshore and it’s a bit choppy. This is expert territory size-wise, but the wind is a letdown.

Now, here’s the standout. Wednesday September 9th. The swell is 12 ft SSW with a period of 18 seconds in the morning, dropping to 10 ft in the afternoon. The combined energy is massive (6587 in the morning). And it’s glassy. The wind is nothing. Absolutely calm. This is a serious, serious groundswell for experts only. The period is very long, so it’ll be a heavy, straight-breaking wave at the beach, but at a reef like Black Rocks Jetty, that’s the key. The alignment is SW, and the optimum direction for this break is SW, so it’s perfectly lined up. This is the best day on offer. If you are an experienced surfer, you do not miss this.

Thursday September 10th the swell drops to 5 ft SW, still glassy and clean. The energy is moderate (1521). It’s a great follow-up session for experienced surfers, but not the big show.

Friday September 11th is another clean day with 4 ft to 4 ft SSW swell, glassy, and a long period of 17 seconds. Energy is moderate (1080). A very pleasant, clean day for a longboard.

Saturday September 12th and Sunday September 13th the swell fades and the onshore wind returns. The 13th is particularly poor, with a 3 ft SSW swell and 12 mph onshore wind. The energy is moderate (942) but the conditions are useless.

Monday September 14th sees a new pulse of 6 ft SSW swell, but the wind is onshore or cross-onshore. The energy is strong (1454), but it’s messy.

Tuesday September 15th is big and blown out. 7 ft to 8 ft SSW swell, but a strong 12 mph cross-onshore wind makes it choppy. The energy is strong (2829). This is a kite-surfing setup, not a paddle session.

Wednesday September 16th is interesting. 8 ft SSW swell in the morning, glassy, with strong energy (2412). The wave comment says “excellent surf conditions for experienced surfers.” This is a good one for the crew who can handle the size. The afternoon gets a bit cross-choppy.

Thursday September 17th the morning is a bit small at 5 ft SSW with a light cross-onshore wind, but the afternoon gets interesting. 7 ft SSW swell, a 16-second period, and a clean cross-offshore wind. The energy is strong (2470). This is a solid afternoon session.

Friday September 18th closes the run with 7 ft SSW swell, glassy in the afternoon. The energy is strong (1939). The wave comment says “excellent surf conditions for experienced surfers.” A clean, big finish to the outlook.

The bottom line: September 9th is the absolute standout for expert surfers. The 6th and the 11th are the best for smaller, cleaner waves. The 16th and 18th are also good for the experienced crew.

Rusty.

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