Surf Forecasts:
Cupsogue surf forecast from 23 Jul 2026:
- Best quality surf: Thursday 23 Jul, 11AM (local time) - 3.5ft (1.0m), 8s period, S swell with cross-offshore winds.
- Most powerful swell: Tuesday 28 Jul, 2PM (local time) - 6ft (1.8m), 7s period, SSE swell with 351 kJ wave energy.
- Next surfable swell (1★+): Thursday 23 Jul, 11AM (local time) - 3.5ft (1.0m), 8s 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 Thursday (Jul 23) at 11AM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.2m and 3s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Cupsogue in the next 16 days are 2.1m 6s and forecast to arrive on Tuesday (Jul 28) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Saturday (Jul 25) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Thu 23rd Jul) | 3.5ft (1.0m) 8s |
| Best Surf | 11AM (Thu 23rd Jul) | 3.5ft (1.0m) 8s |
| Most Powerful | 2PM (Tue 28th Jul) | 6ft (1.8m) 7s |
Table - best surf conditions forecast for Cupsogue over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you. I’ve looked over the next 16 days for the local zone, and Cupsogue is the only break on the map. The honest truth is, it’s looking pretty grim. There’s a long, flat gap from the start until Thursday morning, July 23rd, when we finally see a small bump.
The only real story here is a very inconsistent, fairly quiet run. For the first several days, the surf is tiny and the wind is a mess. Thursday morning the 23rd kicks things off with a weak 3ft S swell, but it’s short period at 8 seconds. The combined energy is weak (132). The water is sitting at 71°, which is just about average for this time of year. The wind is NNE at 9 mph, a cross-off breeze that actually keeps the surface clean. It’s surfable, but very ordinary. That window is the best we get for the first week, but it’s not a standout by any means.
The next few days just dribble away with tiny, weak waves and onshore winds. By Tuesday the 28th of July, the swell bumps up to 6ft from the SSE, but the period is a measly 6 seconds and the wind is cross-on from the E at 9 mph. The energy is moderate (213), but the quality is poor and choppy. It’s a messy beach setup.
The real tease comes on Monday, August 3rd. We get a 6ft SSE swell with a period of 10 seconds, and the combined energy hits strong (641). That’s the biggest push of the whole outlook. But here’s the kicker: the wind is cross-on from the SSE at 9 mph, and the conditions are described as “gentle cross-onshore and fairly choppy.” It’s not clean. For a beach break like Cupsogue, this is a kite surfer’s dream more than a paddle surfer’s. The shape won’t be there for us.
So, what’s the best of a bad lot? Honestly, Thursday morning July 23rd is the only session that offers clean conditions, even if the waves are small and weak. For those with a longboard, you might get a few. The rest of the window is either too small, too windy, or too messy. The second week looks particularly poor, with small, short-period windswell and strong cross-shore winds. This is one of those times where the forecast isn’t sparking any stoke.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Thu afternoon, min 18°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Tue night. Warm (max 21°C on Sun morning, min 18°C on Sun morning). Winds increasing (light winds from the E on Mon night, fresh winds from the NE by Tue night). | ||||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | |||||||||||||||
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) | S 8 | S 8 | SSE 7 | S 7 | SE 6 | SE 8 | S 6 | S 6 | S 8 | S 6 | S 6 | SE 8 | SE 8 | SSE 3 | S 4 | SSE 6 | SE 6 | SSE 7 | S 8 | S 8 | SSE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 131 | 121 | 91 | 24 | 24 | 67 | 3 | 1 | 1 | 7 | 3 | 46 | 45 | 3 | 19 | 213 | 202 | 125 | 134 | 133 | 99 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | glassy | cross-on | on | cross | cross-on | cross-on | cross-off | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | off |
High Tide | 3:51PM0.95m | 4:14AM0.76m | 4:45PM0.97m | 5:08AM0.76m | 5:34PM0.99m | 5:58AM0.78m | 6:19PM1.02m | 6:44AM0.82m | 7:03PM1.05m | 7:27AM0.85m | 7:44PM1.08m | 8:09AM0.89m | 8:25PM1.09m | ||||||||
Low Tide | 8:30AM0.22m | 9:55PM0.30m | 9:20AM0.23m | 11:10PM0.28m | 10:13AM0.23m | 00:06AM0.26m | 11:06AM0.22m | 00:43AM0.22m | 11:58AM0.20m | 1:12AM0.17m | 12:45PM0.16m | 1:42AM0.13m | 1:29PM0.12m | 2:14AM0.09m | |||||||
 | |  | |  |  | | | | | | | | | | |  |  | |  | | |
 | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — | 5:41 | — | — | 5:43 | — | — | 5:43 | — | — |
 | — | 8:15 | — | — | 8:14 | — | — | 8:13 | — | — | 8:12 | — | — | 8:10 | — | — | 8:09 | — | — | 8:08 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 10 | 5 | 1 | — |
Temp °C | 20 | 22 | 22 | 21 | 22 | 21 | 21 | 22 | 21 | 21 | 21 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 19 | 23 | 23 |
Feels °C | 17 | 20 | 20 | 20 | 20 | 19 | 17 | 20 | 19 | 18 | 18 | 19 | 19 | 20 | 21 | 21 | 21 | 20 | 15 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | SSE 7 | S 7 | SE 6 | SE 8 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | SE 8 | SE 8 | SE 8 | ESE 8 | ESE 7 | ENE 7 | SE 6 | SSE 7 | S 8 | S 8 | SSE 8 |
| kJ | 131 | 121 | 91 | 24 | 24 | 67 | 81 | 91 | 86 | 68 | 60 | 46 | 45 | 37 | 37 | 10 | 202 | 125 | 134 | 133 | 99 |
Swell 2 Height (m) Direction Period (s) | — | ENE 4 | NE 4 | SE 6 | SSW 6 | SSW 6 | S 6 | S 6 | S 8 | S 6 | S 6 | S 5 | E 5 | E 5 | S 8 | — | SSW 6 | E 6 | E 6 | E 6 | E 6 |
| kJ | — | 2 | 1 | 21 | 14 | 4 | 3 | 1 | 1 | 7 | 3 | 1 | 2 | 2 | 1 | — | 49 | 36 | 6 | 2 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SE 8 | SE 8 | — | — | — | S 7 | — | SSW 6 | S 6 | — | E 6 | S 9 | — | E 7 | E 9 | E 9 | E 8 | E 8 |
| kJ | — | — | — | 11 | 18 | — | — | — | 1 | — | 3 | 1 | — | 1 | 1 | — | 23 | 2 | 1 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | ENE 3 | — | — | — | — | — | ESE 7 | — | — | — | — | — | — | SSE 3 | S 4 | SSE 6 | NW 3 | ENE 6 | — | — | — |
| kJ | 1 | — | — | — | — | — | 105 | — | — | — | — | — | — | 3 | 19 | 213 | 2 | 63 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 77 | 0 | 216 | 623 | 54 | 762 | 670 | 4 | 55 | 1630 | 55 | 623 | 268 | 227 | 112 | 515 | 92 | 670 | 0 | 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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