Surf Forecasts:
Cupsogue surf forecast from 16 Jul 2026:
- Best quality surf: Sunday 19 Jul, 8AM (local time) - 7ft (2.1m), 7s period, SSW swell with offshore winds.
- Most powerful swell: Sunday 19 Jul, 8AM (local time) - 7ft (2.1m), 7s period, SSW swell with 465 kJ wave energy.
- Next surfable swell (1★+): Thursday 16 Jul, 8PM (local time) - 3.5ft (1.1m), 5s period with SW swell.
Best Forecast Surf Conditions for Cupsogue this week:
The surf forecast for Cupsogue over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 16) at 8PM. The primary swell is predicted to be 1.1m and 5s period with a secondary swell of 0.8m and 5s. Another secondary swell of 0.1m and 9s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cupsogue in the next 16 days are 2.1m 7s and forecast to arrive on Sunday (Jul 19) at 8AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Sunday (Jul 19) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 16th Jul) | 3.5ft (1.1m) 5s |
| Best Surf | 8AM (Sun 19th Jul) | 7ft (2.1m) 7s |
| Most Powerful | 8AM (Sun 19th Jul) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Cupsogue over the next 16 days.
The Lowdown
Alright, let’s talk about Cupsogue. Looking at the next couple of weeks, it’s a pretty bleak picture. There’s a big dry spell at the start with nothing but ankle-high, weak junk. The first thing that’s worth even a second glance is Sunday the 19th morning.
That Sunday morning is the only real standout. We’ve got a 7ft SSW swell coming in, with a period of 8 seconds and a combined energy of 640 – that’s a solid kick of moderate-to-strong energy. The wind is from the WNW at 16 mph, so it’s a cross-offshore breeze, which means clean faces. It’s a good window for the experienced guys. At over 5ft, it’s definitely not for beginners. The water is about 71°, which is about average for the time of year.
After that, it drops right off. The swell goes tiny, and the wind turns messy, mostly cross or onshore, leaving it choppy and poor. The next faint pulse is on Wednesday the 22nd morning. You’ve got a 4ft S swell, a 9-second period, 263 combined energy, and a light N wind at 9 mph that’s cross-offshore. It’s clean, but it’s not exactly pumping. The afternoon gets sloppy again.
The rest of the forecast is a dead zone. Right at the tail end, on Friday the 31st morning, there’s a whisper of a 4ft SSE swell with a clean N wind. But the period is only 6 seconds, so it’s just short, weak wind-swell, and the energy is only moderate at 273. It’s a marginal, iffy call.
To be honest, if you’re not in the water Sunday the 19th morning, you’re probably not going to want to bother. For a beach/jetty setup like this, with mostly onshore slop, most of the 16-day window looks better suited for the kite-surfing crew than for paddle surfers.
Rusty.
Short Range ForecastHeavy rain (total 27mm), heaviest during Sat afternoon. Warm (max 30°C on Thu night, min 20°C on Sat afternoon). Winds increasing (light winds from the SSE on Fri afternoon, strong winds from the SW by Sat night). | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Tue night. Warm (max 28°C on Sun afternoon, min 19°C on Mon morning). Winds increasing (calm on Mon morning, strong winds from the SSW by Tue afternoon). | ||||||||||||||||||||
Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | |||||||||||||||
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) | SSW 6 | SSW 5 | S 5 | S 5 | S 6 | S 5 | S 5 | S 4 | SSW 6 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 7 | S 5 | S 6 | S 8 | S 8 | SSE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 23 | 19 | 8 | 15 | 8 | 13 | 9 | 118 | 191 | 163 | 94 | 112 | 109 | 95 | 68 | 44 | 148 | 279 | 223 | 212 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | off | cross-off | cross-on | cross | cross | cross-on | cross | cross-off | off | cross-off | glassy | cross-on | cross-on | cross | cross-on | cross-off | off | off | cross |
High Tide | 9:45AM1.06m | 10:04PM1.21m | 10:36AM1.06m | 10:54PM1.15m | 11:26AM1.05m | 11:43PM1.07m | 12:15PM1.03m | 00:32AM0.98m | 1:06PM1.00m | 1:23AM0.90m | 2:00PM0.97m | 2:18AM0.83m | 2:55PM0.95m | 3:16AM0.78m | |||||||
Low Tide | 3:18PM-0.01m | 4:01AM-0.04m | 4:09PM0.03m | 4:45AM-0.01m | 4:59PM0.08m | 5:28AM0.04m | 5:51PM0.15m | 6:12AM0.09m | 6:45PM0.20m | 6:56AM0.14m | 7:43PM0.25m | 7:42AM0.19m | 8:45PM0.29m | ||||||||
 | |  |  | | | |  |  |  | | | | | |  |  | | | | | |
 | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:35 | — | — | 5:35 | — | — | 5:35 | — | — | 5:37 | — | — |
 | — | 8:20 | — | — | 8:19 | — | — | 8:19 | — | — | 8:17 | — | — | 8:16 | — | — | 8:16 | — | — | 8:15 | — |
mm | — | — | — | — | — | — | — | 20 | 7 | 1 | — | — | — | — | — | 2 | — | 19 | — | — | — |
Temp °C | 28 | 29 | 30 | 24 | 25 | 23 | 24 | 20 | 23 | 25 | 28 | 26 | 22 | 22 | 22 | 25 | 25 | 24 | 20 | 24 | 24 |
Feels °C | 26 | 27 | 28 | 20 | 23 | 20 | 24 | 18 | 20 | 24 | 25 | 23 | 22 | 19 | 19 | 24 | 22 | 22 | 16 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | SSW 6 | SE 9 | S 5 | S 5 | S 5 | S 5 | SE 8 | S 4 | SE 13 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | SE 12 | S 12 | S 11 | S 8 | S 8 | SSE 8 |
| kJ | 10 | 3 | 19 | 8 | 9 | 5 | 3 | 5 | 7 | 191 | 163 | 94 | 112 | 109 | 95 | 6 | 3 | 2 | 279 | 223 | 212 |
Swell 2 Height (m) Direction Period (s) | SE 8 | S 15 | SE 9 | SE 8 | SE 8 | SE 8 | SE 14 | SE 8 | — | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | — | — | — | — |
| kJ | 3 | 4 | 3 | 3 | 3 | 3 | 7 | 3 | — | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | S 15 | — | SE 15 | SE 15 | SE 14 | SE 14 | E 9 | S 5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 5 | — | 9 | 8 | 8 | 8 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SSW 5 | — | — | S 6 | S 3 | S 5 | S 4 | SSW 6 | — | — | — | NNE 3 | S 2 | — | S 7 | S 5 | S 6 | — | — | NE 2 |
| kJ | — | 23 | — | — | 15 | 2 | 13 | 9 | 118 | — | — | — | 1 | 1 | — | 68 | 44 | 148 | — | — | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1183 | 1634 | 735 | 735 | 735 | 1183 | 744 | 263 | 2340 | 15 | 4 | 0 | 20 | 100 | 77 | 100 | 100 | 0 | 0 | 77 | 0 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Cupsogue Surf forecast
The above surf forecast table for Cupsogue provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cupsogue can be found by selecting the local surf guide option on the grey menu. Our Cupsogue 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 (Cupsogue) 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 Cupsogue 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.
Cupsogue is 12 km (7 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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