Surf Forecasts:
Cupsogue surf forecast from 30 Jul 2026:
- Best quality surf: Thursday 30 Jul, 8PM (local time) - 2.5ft (0.8m), 8s period, SSE swell with offshore winds.
- Most powerful swell: Thursday 30 Jul, 2PM (local time) - 3ft (0.9m), 8s period, SSE swell with 122 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 8PM (local time) - 2.5ft (0.8m), 8s period with SSE 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 30) at 8PM. The primary swell is predicted to be 0.8m and 8s period with a secondary swell of 0.5m and 5s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cupsogue in the next 16 days are 0.9m 8s and forecast to arrive on Thursday (Jul 30) 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 0.8m 5s period and expected on Thursday (Jul 30) at 2PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 30th Jul) | 2.5ft (0.8m) 8s |
| Best Surf | 8PM (Thu 30th Jul) | 2.5ft (0.8m) 8s |
| Most Powerful | 2PM (Thu 30th Jul) | 3ft (0.9m) 8s |
Table - best surf conditions forecast for Cupsogue over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s look at what’s on the cards for Cupsogue over the next couple of weeks.
To be straight with you, this is a rough stretch. The surf just isn’t shaping up. We’ve got a solid 16 days of forecast but there’s not a single standout session in there. The whole period is a bit of a write-off, I’m afraid. The first real chance for a paddle is from Thursday the 30th of July, but the waves are small and the wind is messy. It’s going to be a long, quiet run.
Starting Thursday morning, we’ve got small 3ft SSE swell with a short 8-second period, but that NNE wind at 16 mph is a cross-off, which keeps the surface clean. The wave energy is a weak 154, and the water temp is about 73° – bang on average for this time of year. The problem is, the surf is just poor. We’re looking at knee-high dribble at best. That carries through Thursday afternoon and into Friday, with the swell dropping to 3ft and the wind swinging cross-on, making things choppy.
Over the weekend and into next week, it gets worse. We’re talking swell heights around 1ft to 3ft, but the wind is onshore or cross-onshore from the south, gusting up to 22 mph by Monday. That’s lumpy, bumpy, and just not worth a session. The energy drops into the weak 30s and 40s. By Tuesday the 4th of August, the wind is a strong cross-shore at 25 mph, which is more kite-surfing territory than paddle surfing.
There’s a tiny glimmer on Friday the 7th of August. The morning is glassy, with a 2ft SSE swell, but it’s a short 5-second period. The wave energy is 35 – very weak. It’s clean, but it’s a dribbler. That afternoon, winds go cross-off and it’s clean again with 3ft of swell, but still not enough oomph.
The second week is more of the same. Small, weak, mostly onshore or cross-shore winds. The best you’ll see is a clean 2ft on the 13th of August, but with a 6-second period, it’s barely a ripple. The break here is Cupsogue, a beach and jetty setup, but it’s just not cooperating. The crowds are listed as *sometimes*, but honestly, you won’t have to worry about that because no one will be out.
Hang in there, folks. Forecasts can change, but right now, it’s a flat spell. Keep the board in the car just in case, but don’t hold your breath.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Thu morning. Warm (max 25°C on Sat morning, min 19°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 39mm), heaviest during Mon night. Warm (max 26°C on Sun night, min 23°C on Sun night). Winds increasing (light winds from the SSE on Sun night, strong winds from the SSW by Tue afternoon). | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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 8 | SSE 8 | SSE 8 | SSE 9 | SSE 8 | S 8 | S 9 | S 8 | S 7 | S 7 | S 5 | SSW 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SE 7 | SE 7 | SE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 107 | 96 | 85 | 101 | 72 | 61 | 74 | 80 | 26 | 15 | 34 | 47 | 42 | 55 | 62 | 60 | 47 | 33 | 12 | 12 | 16 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross-on | cross-on | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-off |
High Tide | 8:51AM0.92m | 9:06PM1.09m | 9:31AM0.95m | 9:46PM1.08m | 10:12AM0.98m | 10:26PM1.05m | 10:53AM1.01m | 11:07PM1.01m | 11:36AM1.02m | 11:51PM0.96m | 12:23PM1.03m | 00:40AM0.91m | 1:17PM1.03m | 1:36AM0.86m | |||||||
Low Tide | 2:11PM0.09m | 2:48AM0.06m | 2:53PM0.07m | 3:24AM0.03m | 3:35PM0.06m | 4:01AM0.02m | 4:19PM0.07m | 4:42AM0.02m | 5:06PM0.09m | 5:26AM0.03m | 5:58PM0.12m | 6:14AM0.04m | 6:55PM0.15m | ||||||||
 |  |  |  | |  | | |  |  | | |  | |  | | |  | | | | |
 | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — |
 | — | 8:07 | — | — | 8:07 | — | — | 8:06 | — | — | 8:05 | — | — | 8:04 | — | — | 8:02 | — | — | 8:01 | — |
mm | 7 | — | — | — | — | 1 | — | — | — | — | — | 3 | 5 | 3 | 14 | 3 | 2 | 9 | 1 | — | 1 |
Temp °C | 20 | 21 | 21 | 22 | 23 | 24 | 25 | 25 | 24 | 24 | 24 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 27 |
Feels °C | 18 | 19 | 22 | 23 | 22 | 23 | 25 | 24 | 23 | 24 | 24 | 26 | 26 | 24 | 23 | 26 | 22 | 22 | 25 | 23 | 26 |
Swell 1 Height (m) Direction Period (s) | SSE 8 | SSE 8 | SSE 8 | SSE 9 | SSE 8 | S 8 | S 9 | SE 7 | S 7 | S 7 | SE 7 | S 5 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SE 7 | SE 7 | S 6 |
| kJ | 107 | 96 | 85 | 101 | 72 | 61 | 74 | 7 | 26 | 15 | 7 | 20 | 42 | 55 | 62 | 60 | 47 | 33 | 12 | 12 | 6 |
Swell 2 Height (m) Direction Period (s) | S 8 | E 5 | E 5 | E 6 | E 6 | S 4 | S 5 | SE 9 | SE 9 | SE 7 | SE 9 | SE 7 | SE 9 | — | — | SE 8 | SE 8 | SE 7 | S 6 | S 6 | SE 8 |
| kJ | 4 | 20 | 9 | 3 | 3 | 9 | 11 | 3 | 3 | 13 | 3 | 13 | 3 | — | — | 3 | 3 | 18 | 12 | 7 | 16 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SE 9 | ESE 9 | E 6 | S 9 | SE 9 | S 9 | SSE 8 | — | — | — | — | E 8 | — | — | SE 9 | E 12 |
| kJ | — | — | — | — | — | 3 | 8 | 1 | 7 | 3 | 2 | 7 | — | — | — | — | 1 | — | — | 3 | 3 |
Wind waves Height (m) Direction Period (s) | E 5 | ENE 5 | — | — | SSW 3 | SSW 4 | — | S 8 | S 5 | S 4 | S 5 | SSW 7 | — | SSW 3 | WSW 4 | ENE 3 | E 3 | — | — | SSE 2 | — |
| kJ | 43 | 30 | — | — | 1 | 13 | — | 80 | 15 | 7 | 34 | 47 | — | 4 | 9 | 2 | 1 | — | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 55 | 55 | 0 | 4 | 77 | 0 | 77 | 100 | 287 | 1171 | 1435 | 1144 | 1403 | 321 | 321 | 171 | 1320 | 1403 | 1183 | 1183 | 327 |
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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