Surf Forecasts:
Jetty surf forecast from 15 Sep 2026:
- Most powerful swell: Sunday 20 Sep, 8PM (local time) - 5.5ft (1.7m), 7s period, SSW swell with 249 kJ wave energy.
Best Forecast Surf Conditions for Jetty this week:
The most powerful waves expected at Jetty in the next 16 days are 1.7m 7s and forecast to arrive on Sunday (Sep 20) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Monday (Sep 21) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sun 20th Sep) | 5.5ft (1.7m) 7s |
Table - best surf conditions forecast for Jetty over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at the coming weeks at Jetty.
Truth be told, it's a pretty quiet picture for a while. The first week and a half is mostly flat or real weak, with only a tiny bump of energy on Sunday the 20th that might get you interested if you're desperate for a paddle. The real story starts to build late in the second week, but even then it's not exactly firing for a standard surfboard.
For the first several days, we’re looking at tiny swell, mostly under a foot and a half, with a SE direction. The combined wave energy is weak, in the 20-40 range. Winds are all over the place but mostly onshore or cross-shore, keeping the surface messy. Nothing worth suiting up for. We then get a bit of a bump on Sunday the 20th, with a short-period S swell hitting 5ft to 5ft, and energy jumps to moderate (173-200). The wind on Sunday afternoon swings offshore from the west, cleaning things right up, but the wave comment says it’s only marginal. It might be a sneaky window for a quick session on a bigger board.
After that, we go flat again until around Thursday the 24th. On the morning of the 24th, we start seeing some size with a 6ft SE swell, but the wind is a near gale from the ENE, making a mess. The afternoon cleans up with a strong cross-offshore breeze from the NE, but it’s still pretty rough. The energy is strong (312-355). That pattern continues into Friday the 25th, with the best looking swell of the whole forecast: a 6ft SE groundswell with a 9-second period and clean cross-offshore winds from the NNE. The combined energy is very strong, hitting 573. This is the standout window, but at 6ft it’s getting into that territory that’s less friendly for beginners. The swell direction is from the SE, which is a decent match for the optimum direction.
After that, it drops back down through the weekend and into the start of October. By Monday the 28th, we have a small, clean 2ft SE swell with light offshore winds from the NW. The energy is back down to 67, so it’s weak but clean. It’s surfable, but ordinary. Then it’s back to tiny and choppy for the rest of the run.
So, to sum it up: the best bet is Friday the 25th of September. Head down to Jetty for a SSE swell around 6ft with clean cross-offshore winds. It’ll have proper energy behind it. The Sunday the 20th afternoon could be a sneaky, clean little session if you’re not fussy about size.
Stay tuned, Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Thu morning, min 15°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sun afternoon. Warm (max 26°C on Sun afternoon, min 18°C on Fri night). Winds increasing (calm on Fri night, fresh winds from the SSW by Sun morning). | ||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | SE 8 | SE 9 | SE 9 | SE 9 | ESE 9 | ESE 5 | E 8 | ESE 8 | ESE 7 | SSW 5 | SE 12 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | S 6 | S 6 | S 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 25 | 20 | 13 | 13 | 8 | 5 | 29 | 19 | 18 | 19 | 23 | 22 | 21 | 21 | 25 | 19 | 125 | 173 | 67 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross-off | cross | cross | cross-on | cross-on | on | cross-on | cross-off | cross-off |
High Tide | 10:40PM0.99m | 11:03AM1.09m | 11:24PM0.92m | 11:48AM1.03m | 00:11AM0.85m | 12:36PM0.98m | 1:03AM0.79m | 1:31PM0.93m | 2:03AM0.75m | 2:31PM0.90m | 3:07AM0.74m | 3:33PM0.90m | 4:08AM0.77m | ||||||
Low Tide | 4:04AM0.09m | 4:38PM0.14m | 4:41AM0.14m | 5:21PM0.20m | 5:23AM0.19m | 6:08PM0.26m | 6:10AM0.25m | 7:02PM0.30m | 7:03AM0.29m | 8:03PM0.32m | 8:04AM0.31m | 9:09PM0.31m | |||||||
 |  | | | |  | | | |  | | | | | | | |  | | |
 | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — |
 | 7:01 | — | 7:00 | — | — | 6:58 | — | — | 6:57 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 20 | 15 | 16 | 17 | 18 | 20 | 21 | 22 | 22 | 22 | 23 | 25 | 23 | 19 | 19 | 21 | 22 | 26 | 24 |
Feels °C | 14 | 12 | 14 | 16 | 16 | 18 | 20 | 21 | 20 | 20 | 21 | 23 | 23 | 16 | 16 | 17 | 19 | 26 | 23 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 9 | E 5 | ESE 5 | ESE 5 | ESE 5 | E 8 | ESE 8 | ESE 7 | ESE 6 | SSW 5 | SSW 4 | ESE 4 | SE 8 | ESE 8 | ESE 5 | SE 11 | SE 11 | S 6 |
| kJ | 25 | 20 | 13 | 4 | 5 | 5 | 29 | 19 | 18 | 8 | 7 | 4 | 12 | 10 | 25 | 12 | 18 | 18 | 67 |
Swell 2 Height (m) Direction Period (s) | S 6 | S 6 | SE 9 | SE 9 | ESE 9 | ESE 7 | SE 13 | SSE 13 | SSE 12 | SE 12 | ESE 7 | ESE 7 | SE 12 | SE 12 | SE 11 | SE 7 | SE 11 | ESE 7 | SE 10 |
| kJ | 7 | 3 | 13 | 13 | 8 | 5 | 7 | 16 | 15 | 6 | 9 | 9 | 21 | 21 | 20 | 14 | 30 | 9 | 25 |
Swell 3 Height (m) Direction Period (s) | S 15 | SE 15 | S 6 | SE 14 | SE 13 | SE 10 | — | — | SE 9 | SE 9 | SE 12 | SE 12 | SE 9 | — | — | SE 11 | — | — | — |
| kJ | 4 | 8 | 1 | 8 | 7 | 4 | — | — | 3 | 3 | 23 | 22 | 12 | — | — | 19 | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 4 | E 5 | — | — | — | SSW 2 | SSW 3 | SW 4 | SSW 3 | SSW 5 | — | — | — | E 6 | SE 4 | S 4 | S 6 | S 6 | NNE 3 |
| kJ | 5 | 14 | — | — | — | 1 | 4 | 4 | 4 | 19 | — | — | — | 18 | 3 | 12 | 125 | 173 | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 245 | 872 | 865 | 888 | 763 | 324 | 138 | 123 | 763 | 522 | 50 | 743 | 324 | 1179 | 1179 | 1179 | 324 | 120 | 58 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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Information about the Jetty Surf forecast
The above surf forecast table for Jetty provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Jetty can be found by selecting the local surf guide option on the grey menu. Our Jetty surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Jetty) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Jetty may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Jetty is 15 km (9 miles) from Mastic. If you plan a vacation in Long Island New York, look for hotels and other accommodation in Mastic. Mastic has rooms for a wide range of budgets as well as car hire and transport links.
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