
Surf Forecasts:
Cupsogue surf forecast from 17 Jul 2026:
- Best quality surf: Sunday 19 Jul, 8AM (local time) - 4ft (1.2m), 7s period, S swell with offshore winds.
- Most powerful swell: Wednesday 22 Jul, 2PM (local time) - 7ft (2.2m), 8s period, S swell with 670 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 8AM (local time) - 4ft (1.2m), 7s period with S 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 Sunday (Jul 19) at 8AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.1m and 13s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cupsogue in the next 16 days are 2.2m 8s and forecast to arrive on Wednesday (Jul 22) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Wednesday (Jul 22) at 5PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 19th Jul) | 4ft (1.2m) 7s |
| Best Surf | 8AM (Sun 19th Jul) | 4ft (1.2m) 7s |
| Most Powerful | 2PM (Wed 22nd Jul) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Cupsogue over the next 16 days.
The Lowdown
G’day, Rusty here, looking at the 16-day window for Cupsogue. To be straight up, this is a pretty quiet stretch overall. The surf is small and onshore for most of it, so you’ll be waiting a while for anything decent. The first real chance of a wave isn’t until Sunday the 19th, and even then, it’s nothing to write home about. There’s a gap of just over a day from the start of the forecast with no recommendations, so don’t bother paddling out until then.
That Sunday morning, the 19th, we’ve got a few options. Cupsogue (beach/jetty) will see a 4ft south swell with a period of 8 seconds. The combined energy is moderate at 176. The wind is offshore from the northwest at 12 mph, so the surf will be clean. It’s a fairly consistent spot, but it does get crowded sometimes. The water temperature is about average for the time of year. This is probably the pick of the bunch, but it’s still just ordinary conditions. The afternoon holds similar with a 4ft south swell and lighter offshore winds, staying clean.
Monday the 20th morning is a real tease. The swell drops to 3ft from the south, period of 8 seconds, but the wind goes glassy from the east-southeast at just 3 mph. The energy is low at 94. It’ll be clean as a whistle, but the waves are small. The afternoon turns choppy again with a cross-onshore wind.
The standout in the whole window is actually Wednesday the 22nd afternoon. The swell picks up to 6ft from the south, period of 9 seconds, and the combined energy is strong at 567. The wind is cross-offshore from the west at 12 mph, so the surf will be clean. This is a solid size, good for more experienced surfers, and the conditions are far better than anything else. The morning of the 22nd is a write-off though, with fresh onshore winds and a lumpy 6ft swell.
After that, it’s back to small and messy. Thursday the 23rd morning has a 4ft swell from the south-southeast, period of 9 seconds, energy at 282, and cross-offshore winds from the north-northeast – clean, but not much push. The rest of the window is a mix of tiny swell and poor winds all the way through to the end of July and into early August. There’s a brief mention of a glassy 4ft swell from the southwest on the morning of Friday the 31st of July, with energy at 161, but it’s a long way off and the period is short at 6 seconds, so don’t count on it.
Honestly, if you’re keen, target the 22nd afternoon for the best chance of a decent wave. Otherwise, it’s a lot of waiting for small, choppy conditions. If the swell is up and the wind is on, this beach setup might be more interesting for kite surfing than paddle surfing.
Rusty.
Short Range ForecastHeavy rain (total 22mm), heaviest during Sat night. Warm (max 29°C on Thu night, min 21°C on Sat afternoon). Winds increasing (calm on Fri afternoon, strong winds from the SW by Sat night). | Days 5-7 Weather SummaryModerate rain (total 19mm), heaviest on Wed morning. Warm (max 28°C on Wed afternoon, min 19°C on Sun night). Winds increasing (calm on Mon morning, strong winds from the SSW by Wed morning). | ||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||
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) | S 5 | S 5 | S 5 | S 5 | S 5 | S 4 | S 6 | S 8 | S 8 | S 7 | S 8 | S 8 | S 7 | S 7 | SSE 7 | S 6 | S 8 | S 9 | S 9 |
Wave Graph | |||||||||||||||||||
11 | 9 | 15 | 8 | 12 | 14 | 113 | 169 | 141 | 69 | 82 | 76 | 51 | 35 | 69 | 92 | 357 | 567 | 380 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-on | cross | cross | cross-on | cross-off | off | off | cross-off | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off |
High Tide | 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 | 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 | |||||||
— | 5:33 | — | — | 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 | — | — | — | — | — | 7 | 15 | — | — | — | — | — | — | — | — | 4 | 9 | 6 | — |
Temp °C | 29 | 24 | 26 | 24 | 24 | 23 | 23 | 25 | 27 | 25 | 22 | 22 | 22 | 23 | 25 | 24 | 25 | 28 | 22 |
Feels °C | 28 | 20 | 24 | 21 | 22 | 20 | 19 | 24 | 24 | 21 | 21 | 18 | 19 | 22 | 23 | 23 | 21 | 26 | 16 |
Swell 1 Height (m) Direction Period (s) | S 5 | S 5 | S 5 | S 5 | SE 8 | SE 8 | SE 13 | S 8 | S 8 | S 7 | S 8 | S 8 | S 7 | S 7 | SE 12 | S 6 | — | S 9 | S 9 |
11 | 9 | 9 | 8 | 3 | 3 | 7 | 169 | 141 | 69 | 82 | 76 | 51 | 35 | 5 | 92 | — | 567 | 380 | |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 8 | SE 8 | SE 8 | SE 14 | SE 13 | — | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 9 | SE 8 | — | S 7 | — | — | — |
3 | 3 | 3 | 3 | 7 | 7 | — | 7 | 6 | 6 | 6 | 6 | 3 | 3 | — | 4 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SE 15 | — | — | SE 14 | E 9 | S 9 | — | — | SE 13 | SE 8 | SE 12 | — | SE 12 | SE 12 | — | SE 11 | — | — | — |
9 | — | — | 8 | 2 | 1 | — | — | 6 | 2 | 6 | — | 6 | 6 | — | 5 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | NE 3 | S 5 | SSW 3 | S 5 | S 4 | S 6 | NNW 2 | NNW 3 | — | — | — | — | — | SSE 7 | — | S 8 | WSW 5 | NNW 2 |
— | 2 | 15 | 4 | 12 | 14 | 113 | 1 | 1 | — | — | — | — | — | 69 | — | 357 | 63 | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 735 | 744 | 735 | 744 | 744 | 1453 | 243 | 0 | 0 | 50 | 0 | 100 | 100 | 1171 | 1171 | 1171 | 116 | 131 | 61 |
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.










