Surf Forecasts:
Jetty surf forecast from 14 Sep 2026:
- Best quality surf: Monday 21 Sep, 5AM (local time) - 4.5ft (1.4m), 6s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 21 Sep, 8AM (local time) - 5ft (1.5m), 7s period, E swell with 196 kJ wave energy.
- Next surfable swell (1★+): Monday 21 Sep, 5AM (local time) - 4.5ft (1.4m), 6s period with E swell.
Best Forecast Surf Conditions for Jetty this week:
The surf forecast for Jetty over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 21) at 5AM. The primary swell is predicted to be 1.4m and 6s period with a secondary swell of 0.3m and 6s. Another secondary swell of 0.2m and 10s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Jetty in the next 16 days are 1.5m 7s and forecast to arrive on Monday (Sep 21) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 5s period and expected on Tuesday (Sep 15) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 21st Sep) | 4.5ft (1.4m) 6s |
| Best Surf | 5AM (Mon 21st Sep) | 4.5ft (1.4m) 6s |
| Most Powerful | 8AM (Mon 21st Sep) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Jetty over the next 16 days.
The Lowdown
Hey folks, Rusty here. We’ve got a pretty grim stretch ahead for Jetty. For the next week and a half, the surf is mostly flat, onshore, or just plain messy. There’s a big, clean pulse that shows up around Thursday the 24th, but it’s only for the experts. Let’s walk through it.
Right now, and for the first week, it’s a whole lot of nothing. Tiny swell, rarely over 2ft, and the wind is mostly cross or onshore, keeping things choppy and weak. The combined wave energy is struggling to break 60 (42–59) – just not enough juice to get excited about. Monday the 14th has a clean 1ft SE swell, but it’s 1ft, so you’d be floating more than riding.
There’s a glimmer on Sunday the 20th: a 4ft SSW swell rolls in, with clean cross-offshore winds (WNW in the morning, NNE in the afternoon). The combined energy jumps to 110 – still only moderate – but the conditions are clean. Even then, the waves are just poor quality, so don’t get your hopes up. Good for a paddle, maybe.
Now, the standout. Thursday the 24th is the day we’ve been waiting for. We get a solid 10ft E swell hitting with a period of 9-10 seconds. The combined energy is a massive 2329–2946 – that’s strong, proper power. The winds are clean cross-offshore from the NNE-NE, so the face should be glassy. But heads up: at 10ft, this is strictly for experienced surfers. Beginners, sit this one out. Jetty is a breakwater, so it can handle that size, but short-period groundswell like this (9-10 sec) will dump close together and might close out if it’s too straight. Best to be on your game.
After that, it fades fast. Friday the 25th drops to 6ft, but the wind swings onshore and ruins it. The rest of the run stays small and messy, with energy falling back under 150.
Oh, and water temp? Nothing stands out as an anomaly – it’s just average for this time of year, so don’t expect any surprises on that front.
Bottom line: unless you’re an expert, the only real window is the 24th, and even then it’s a gamble with the shorter period. For the rest of us, it’s a long dry spell. Hang tight – forecasts change.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Mon afternoon, min 15°C on Tue morning). Winds decreasing (fresh winds from the N on Mon morning, calm by Wed morning). | Days 4-6 Weather SummarySome drizzle, heaviest during Sat night. Warm (max 22°C on Thu night, min 20°C on Thu morning). Winds increasing (light winds from the NNW on Thu night, fresh winds from the SSW by Sat night). | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
AM | PM | 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 9 | SE 9 | SE 8 | E 6 | E 6 | ESE 5 | ESE 5 | SE 5 | SE 6 | ESE 8 | ESE 7 | SSW 4 | SE 12 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SW 5 | S 6 | E 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 28 | 27 | 25 | 32 | 21 | 7 | 8 | 7 | 11 | 23 | 18 | 11 | 23 | 22 | 21 | 21 | 24 | 24 | 72 | 25 | 42 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross | cross-on | on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-off | cross-on | cross-on | on | on | cross-on | cross | off | cross |
High Tide | 10:20AM1.13m | 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 | 3:59PM0.09m | 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 | ||||||||
 | |  | | | | | | | | |  |  | | | | |  |  | | | |
 | 6:28 | — | — | 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 | 2 | — | — |
Temp °C | 19 | 22 | 21 | 16 | 16 | 17 | 18 | 18 | 20 | 21 | 21 | 22 | 21 | 21 | 20 | 20 | 21 | 22 | 22 | 27 | 24 |
Feels °C | 13 | 16 | 15 | 13 | 14 | 16 | 17 | 16 | 19 | 20 | 19 | 21 | 18 | 19 | 18 | 19 | 19 | 21 | 20 | 28 | 24 |
Swell 1 Height (m) Direction Period (s) | S 6 | SE 9 | SE 8 | SE 8 | E 6 | ESE 5 | ESE 5 | SE 5 | SE 6 | ESE 8 | ESE 7 | ESE 6 | ESE 6 | ESE 6 | ESE 4 | ESE 6 | ESE 8 | SE 8 | SSW 5 | S 6 | SSW 6 |
| kJ | 10 | 27 | 25 | 14 | 21 | 7 | 8 | 7 | 11 | 23 | 18 | 8 | 8 | 8 | 3 | 13 | 24 | 16 | 30 | 25 | 12 |
Swell 2 Height (m) Direction Period (s) | SE 9 | S 6 | S 6 | S 6 | SE 9 | SE 9 | ESE 9 | ESE 7 | ESE 8 | SSE 13 | SSE 12 | SE 12 | SSW 4 | SSW 4 | ESE 7 | SE 8 | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 |
| kJ | 28 | 6 | 7 | 3 | 13 | 3 | 8 | 5 | 11 | 16 | 15 | 6 | 3 | 2 | 9 | 11 | 20 | 19 | 30 | 18 | 17 |
Swell 3 Height (m) Direction Period (s) | SE 5 | — | E 5 | SE 15 | SE 7 | E 7 | SE 13 | SE 13 | SE 13 | — | SE 9 | SE 9 | SE 12 | SE 12 | SE 12 | SE 12 | ESE 11 | — | — | ESE 7 | SE 8 |
| kJ | 4 | — | 1 | 8 | 2 | 4 | 7 | 7 | 7 | — | 3 | 3 | 23 | 22 | 21 | 21 | 13 | — | — | 5 | 3 |
Wind waves Height (m) Direction Period (s) | N 3 | NNW 3 | NE 4 | E 6 | — | — | — | — | SSW 3 | — | SSW 3 | SSW 4 | — | — | E 4 | — | SSE 3 | S 4 | SW 5 | N 2 | E 5 |
| kJ | 3 | 3 | 7 | 32 | — | — | — | — | 1 | — | 2 | 11 | — | — | 4 | — | 1 | 24 | 72 | 1 | 42 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 65 | 50 | 324 | 740 | 865 | 867 | 160 | 1170 | 138 | 123 | 1170 | 146 | 356 | 867 | 584 | 1179 | 2510 | 867 | 118 | 14 | 221 |
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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