Surf Forecasts:
Cupsogue surf forecast from 27 Aug 2026:
- Best quality surf: Friday 28 Aug, 8PM (local time) - 2ft (0.6m), 8s period, SE swell with offshore winds.
- Most powerful swell: Thursday 3 Sep, 8AM (local time) - 4.5ft (1.3m), 6s period, E swell with 111 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 8PM (local time) - 2ft (0.6m), 8s period with SE 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 Friday (Aug 28) at 8PM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.5m and 6s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cupsogue in the next 16 days are 1.3m 6s and forecast to arrive on Thursday (Sep 03) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Wednesday (Sep 02) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Fri 28th Aug) | 2ft (0.6m) 8s |
| Best Surf | 8PM (Fri 28th Aug) | 2ft (0.6m) 8s |
| Most Powerful | 8AM (Thu 3rd Sep) | 4.5ft (1.3m) 6s |
Table - best surf conditions forecast for Cupsogue over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's cookin' for our local stretch.
Honestly, the next couple of weeks are looking like a bit of a flat spell for Cupsogue. You’re gonna have to be patient. The first real chance of even seeing something rideable isn't until Thursday, the 3rd of September, and even that's a small one. We are in for a long quiet run before that.
The water temp is sitting at a pretty normal 72.1° for the time of year, so the summer shorts are still fine.
So, Thursday the 3rd of September morning is where we’ll be looking. We’ve got a tiny 1.3ft swell coming out of the SE with a period of 9 seconds. The wind is light out of the West, giving us a clean, cross-off breeze. The combined energy is weak (42). It’s surfable, just barely, but I wouldn't be rushing out of bed for it. After that, it gets messy or drops off again. We see a slight bump around Sunday the 6th into Monday the 7th of September, but the wind is onshore and choppy, so the quality will be poor. The swell picks up to about 3.3ft from the South on Monday the 7th, but with a cross-onshore breeze, it’s going to be a messy closeout.
The standouts? Honestly, there aren't any standouts. The best bet in the whole 16-day window is that Thursday the 3rd of September morning session, just because it's the only time you get a clean wind with any wave height at all. For the rest of it, with the onshore winds and small swell, the beach setup at Cupsogue (United States) looks more interesting for a kite surfer than a paddle surfer.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu night. Warm (max 26°C on Fri night, min 19°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Mon night. Warm (max 25°C on Mon afternoon, min 19°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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 8 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | S 6 | SSW 4 | SE 8 | SE 8 | SW 5 | SSW 5 | SSW 5 | S 6 | SE 11 | SE 11 | E 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 58 | 62 | 61 | 84 | 55 | 49 | 38 | 31 | 31 | 24 | 10 | 9 | 20 | 15 | 33 | 22 | 20 | 32 | 59 | 56 | 74 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross-on | cross-off | cross-off | on | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-on | cross-on | cross-on | cross | cross |
High Tide | 7:58PM1.10m | 8:20AM1.02m | 8:38PM1.10m | 9:00AM1.07m | 9:18PM1.09m | 9:41AM1.10m | 9:59PM1.07m | 10:23AM1.12m | 10:42PM1.02m | 11:08AM1.12m | 11:28PM0.97m | 11:57AM1.10m | 00:19AM0.91m | ||||||||
Low Tide | 1:09PM0.11m | 1:42AM0.08m | 1:51PM0.06m | 2:17AM0.03m | 2:33PM0.03m | 2:54AM0.00m | 3:15PM0.02m | 3:32AM-0.01m | 3:59PM0.02m | 4:13AM-0.00m | 4:46PM0.05m | 4:58AM0.02m | 5:38PM0.10m | ||||||||
 | |  |  | |  | | |  | |  | | | |  | | | |  | | | |
 | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | — | 7:30 | — | — | 7:30 | — | — | 7:28 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | — | 7:22 | — |
mm | — | — | 1 | 2 | 1 | — | — | — | — | — | — | — | 1 | — | 9 | — | — | — | 4 | 2 | 4 |
Temp °C | 24 | 24 | 24 | 25 | 25 | 26 | 20 | 22 | 22 | 23 | 24 | 24 | 23 | 25 | 25 | 23 | 23 | 20 | 21 | 22 | 24 |
Feels °C | 23 | 23 | 25 | 26 | 25 | 28 | 18 | 21 | 21 | 22 | 22 | 23 | 25 | 26 | 26 | 23 | 22 | 18 | 21 | 23 | 25 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | S 6 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 6 | S 5 | SE 6 | SE 6 | S 6 | S 6 | SE 11 | S 6 |
| kJ | 58 | 62 | 61 | 84 | 55 | 49 | 38 | 18 | 31 | 24 | 18 | 17 | 20 | 6 | 17 | 10 | 10 | 32 | 17 | 56 | 20 |
Swell 2 Height (m) Direction Period (s) | — | — | SSE 6 | S 6 | S 6 | S 6 | S 6 | SE 8 | S 6 | S 6 | S 6 | S 5 | — | SE 8 | SE 6 | SE 11 | SE 10 | SE 10 | SE 11 | S 6 | SE 10 |
| kJ | — | — | 22 | 15 | 16 | 17 | 18 | 31 | 11 | 10 | 10 | 2 | — | 10 | 14 | 4 | 4 | 14 | 59 | 10 | 34 |
Swell 3 Height (m) Direction Period (s) | — | — | S 5 | — | E 10 | SSE 6 | E 10 | NE 4 | NE 4 | E 9 | — | — | — | — | SE 8 | — | SE 13 | SSE 12 | W 4 | — | — |
| kJ | — | — | 18 | — | 2 | 4 | 2 | 1 | 1 | 2 | — | — | — | — | 3 | — | 7 | 15 | 1 | — | — |
Wind waves Height (m) Direction Period (s) | S 6 | S 4 | — | — | — | — | — | — | — | — | — | SSW 4 | S 4 | SSW 4 | SW 5 | SSW 5 | SSW 5 | ENE 3 | E 5 | E 5 | E 6 |
| kJ | 15 | 21 | — | — | — | — | — | — | — | — | — | 9 | 10 | 15 | 33 | 22 | 20 | 2 | 10 | 18 | 74 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 226 | 1171 | 77 | 76 | 261 | 43 | 39 | 78 | 53 | 53 | 3344 | 623 | 623 | 870 | 175 | 91 | 2533 | 121 | 100 | 116 | 20 |
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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