Surf Forecasts:
Jetty surf forecast from 17 Aug 2026:
- Best quality surf: Monday 17 Aug, 2PM (local time) - 4.5ft (1.3m), 6s period, SSE swell with glassy winds.
- Most powerful swell: Monday 17 Aug, 2PM (local time) - 4.5ft (1.3m), 6s period, SSE swell with 117 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 2PM (local time) - 4.5ft (1.3m), 6s period with SSE 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 (Aug 17) at 2PM. The primary swell is predicted to be 1.3m and 6s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Jetty in the next 16 days are 1.3m 6s and forecast to arrive on Monday (Aug 17) at 2PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Aug 21) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Mon 17th Aug) | 4.5ft (1.3m) 6s |
| Best Surf | 2PM (Mon 17th Aug) | 4.5ft (1.3m) 6s |
| Most Powerful | 2PM (Mon 17th Aug) | 4.5ft (1.3m) 6s |
Table - best surf conditions forecast for Jetty over the next 16 days.
The Lowdown
Alright, Rusty here, let's talk about what's on the cards for the Jetty.
Honestly, the next 16 days are a bit of a write-off for the Jetty. We’ve got a long stretch of small, weak, and messy surf ahead. The water is sitting at 76°, which is a solid 4° warmer than usual for this time of year – feels like bathwater.
The only real glimmer in the whole forecast lands on the afternoon of Monday the 17th. That afternoon, we get a clean-up with the wind swinging offshore from the NNW at 6 mph. The swell is a modest 5 ft out of the SSE, but with a short period of just 7 seconds, so it’s not going to have much punch. The combined energy is moderate (272). It’s small, but with glassy conditions, it’ll be the best we see. The Jetty can get a few people on it, but it’s worth a look.
After that brief window, it’s a downhill slide. The rest of the first week and into the second is plagued by onshore and cross-shore winds, tiny swell, and choppy conditions. We’re looking at waves under 3 ft and weak energy readings in the double digits – definitely not worth paddling out for.
The second week holds a bit more size, but it comes with a catch. By the 28th of August, the swell picks up to 4 ft to 4 ft from the SE with a long period of 12 to 14 seconds, and the energy readings jump into the strong range (502 to 614). That sounds promising, but it’s a long-period groundswell hitting a beach break, which tends to close out. Plus, it's accompanied by a fresh, cross-shore wind from the ENE at 16 to 19 mph, making it lumpy and messy. This setup looks more interesting for kite surfing than paddle surfing, unless you're an expert looking for a challenge.
The 29th of August morning sees the wind go cross-off from the NNE, cleaning it up, but the swell drops back to 3 ft with only moderate energy (139). The 30th and 31st are back to onshore junk.
Bottom line: your best bet is the Monday afternoon of the 17th for a few clean, but small, waves. The rest of the forecast is a waiting game. It’s a long blank run, but it happens around here.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Mon morning. Warm (max 27°C on Tue afternoon, min 22°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 33mm), heaviest during Fri afternoon. Warm (max 25°C on Thu morning, min 20°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | SSE 6 | SSE 6 | SSE 6 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 6 | ESE 8 | SE 7 | SE 7 | SE 8 | SE 8 | SE 8 | SE 8 | ESE 5 | ESE 6 | ESE 6 | ESE 6 | SE 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 121 | 100 | 66 | 72 | 57 | 59 | 36 | 26 | 22 | 24 | 12 | 12 | 18 | 18 | 17 | 16 | 58 | 85 | 80 | 35 | 22 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | off | cross-off | off | cross-on | cross-off | cross-on | cross-on | cross-off | glassy | cross-on | cross-on | cross-off | cross-off | cross-off | cross | cross-on | cross-on | glassy | cross-on | cross-off |
High Tide | 11:39AM1.07m | 11:58PM0.96m | 12:27PM1.02m | 00:46AM0.87m | 1:17PM0.98m | 1:39AM0.80m | 2:13PM0.94m | 2:38AM0.76m | 3:12PM0.92m | 3:41AM0.74m | 4:11PM0.94m | 4:40AM0.76m | 5:04PM0.97m | ||||||||
Low Tide | 5:14PM0.15m | 5:24AM0.12m | 6:01PM0.21m | 6:06AM0.17m | 6:52PM0.27m | 6:53AM0.22m | 7:48PM0.31m | 7:44AM0.26m | 8:52PM0.33m | 8:39AM0.28m | 10:06PM0.32m | 9:39AM0.28m | 11:16PM0.29m | ||||||||
 |  |  |  | |  | | | |  | |  |  |  |  | | |  | | | | |
 | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — |
 | — | 7:45 | — | — | 7:45 | — | — | 7:43 | — | — | 7:42 | — | — | 7:39 | — | — | 7:38 | — | — | 7:37 | — |
mm | 3 | 1 | — | — | — | — | — | — | — | — | 5 | 7 | 1 | 16 | 3 | — | — | 1 | 11 | 5 | 12 |
Temp °C | 24 | 26 | 23 | 24 | 27 | 26 | 26 | 27 | 26 | 25 | 25 | 23 | 21 | 21 | 20 | 21 | 22 | 22 | 23 | 23 | 21 |
Feels °C | 24 | 30 | 24 | 26 | 28 | 27 | 27 | 26 | 26 | 27 | 26 | 25 | 21 | 21 | 19 | 21 | 22 | 23 | 27 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | SSE 6 | SSE 6 | SSE 6 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 6 | S 5 | S 5 | SSW 4 | SE 8 | SE 8 | E 4 | SE 8 | ESE 8 | ESE 6 | ESE 6 | ESE 6 | ESE 6 |
| kJ | 121 | 100 | 66 | 72 | 57 | 59 | 36 | 26 | 22 | 14 | 9 | 5 | 18 | 18 | 10 | 16 | 6 | 85 | 80 | 35 | 10 |
Swell 2 Height (m) Direction Period (s) | — | — | — | SE 13 | E 4 | SSE 11 | SE 10 | SE 9 | SSW 4 | ESE 8 | SE 7 | SE 7 | S 5 | S 5 | SE 8 | SE 13 | SE 13 | SE 13 | SE 12 | S 5 | S 5 |
| kJ | — | — | — | 7 | 1 | 12 | 16 | 14 | 4 | 24 | 12 | 12 | 2 | 2 | 17 | 7 | 7 | 7 | 24 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | S 14 | — | SE 12 | — | — | SE 9 | SSW 5 | SSE 6 | SE 9 | SE 9 | SE 15 | SE 14 | — | — | SE 9 | — | S 5 | SE 12 | SE 12 |
| kJ | — | — | 4 | — | 6 | — | — | 14 | 3 | 6 | 12 | 12 | 8 | 8 | — | — | 3 | — | 1 | 23 | 22 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 6 | — | SW 4 | SW 4 | SSW 4 | NE 3 | E 4 | — | E 4 | ESE 5 | — | — | — | SSW 5 |
| kJ | — | — | — | — | — | — | — | 6 | — | 9 | 3 | 5 | 3 | 9 | — | 12 | 58 | — | — | — | 17 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 65 | 0 | 0 | 0 | 73 | 0 | 65 | 152 | 18 | 50 | 1179 | 50 | 865 | 346 | 272 | 90 | 393 | 94 | 0 | 65 | 4 |
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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