Surf Forecasts:
Cupsogue surf forecast from 17 Sep 2026:
- Most powerful swell: Monday 21 Sep, 2AM (local time) - 6ft (1.8m), 6s period, SW swell with 228 kJ wave energy.
Best Forecast Surf Conditions for Cupsogue this week:
The most powerful waves expected at Cupsogue in the next 16 days are 1.8m 6s and forecast to arrive on Monday (Sep 21) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 11s period and expected on Thursday (Sep 24) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Mon 21st Sep) | 6ft (1.8m) 6s |
Table - best surf conditions forecast for Cupsogue over the next 16 days.
Short Range ForecastMostly dry. Warm (max 26°C on Fri afternoon, min 15°C on Sat morning). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Sun night. Warm (max 21°C on Sun night, min 13°C on Sun night). Winds decreasing (fresh winds from the SSW on Sun night, light winds from the ENE by Mon afternoon). | ||||||||||||||||||||
Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | |||||||||||||||
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 13 | SSE 12 | SSW 5 | SE 12 | SE 12 | SE 12 | E 5 | SE 12 | SE 11 | SE 11 | SE 11 | SW 6 | S 6 | SE 9 | S 5 | E 7 | ESE 8 | E 8 | ESE 9 | ESE 10 | ESE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 16 | 15 | 25 | 23 | 22 | 21 | 34 | 5 | 5 | 18 | 18 | 228 | 24 | 14 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-off | off | cross-off | cross | on | on | on | cross-on | cross-off | cross-off | cross | cross-on | cross | cross | cross | cross | cross-on | cross |
High Tide | 12:36PM0.98m | 1:03AM0.79m | 1:31PM0.93m | 2:03AM0.75m | 2:31PM0.90m | 3:07AM0.74m | 3:33PM0.90m | 4:08AM0.77m | 4:30PM0.93m | 5:01AM0.84m | 5:20PM0.97m | 5:46AM0.91m | 6:05PM1.01m | ||||||||
Low Tide | 6:08PM0.26m | 6:10AM0.25m | 7:02PM0.30m | 7:03AM0.29m | 8:03PM0.32m | 8:04AM0.31m | 9:09PM0.31m | 9:07AM0.30m | 10:11PM0.28m | 10:10AM0.27m | 11:03PM0.23m | 11:08AM0.21m | 11:47PM0.16m | ||||||||
 | |  |  | | | | | |  | |  | | | |  | |  | | | | |
 | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — |
 | — | 6:57 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:47 | — | — | 6:46 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | 3 | 10 | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 22 | 22 | 26 | 24 | 15 | 16 | 16 | 17 | 19 | 21 | 15 | 20 | 19 | 15 | 16 | 15 | 15 | 16 | 14 |
Feels °C | 21 | 21 | 21 | 22 | 22 | 21 | 9 | 12 | 13 | 13 | 15 | 17 | 10 | 17 | 16 | 10 | 9 | 8 | 7 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | E 7 | E 7 | S 5 | SSW 5 | ESE 7 | SE 8 | ESE 6 | ESE 7 | SE 11 | SE 11 | S 6 | S 6 | SSW 6 | S 5 | — | — | — | — | — | ESE 11 |
| kJ | 21 | 10 | 9 | 12 | 7 | 9 | 11 | 66 | 57 | 18 | 18 | 101 | 24 | 10 | 2 | — | — | — | — | — | 2200 |
Swell 2 Height (m) Direction Period (s) | SSE 13 | SSE 12 | SE 12 | ESE 7 | ESE 7 | SE 12 | SE 12 | SE 12 | SE 11 | ESE 7 | ESE 7 | SE 10 | SE 9 | SE 9 | — | — | — | — | — | — | — |
| kJ | 16 | 15 | 6 | 10 | 9 | 21 | 21 | 5 | 5 | 9 | 5 | 33 | 13 | 14 | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 12 | SE 12 | S 4 | — | — | — | — | ESE 7 | ESE 7 | ESE 8 | SE 8 | — | — | — | — | — | — | — |
| kJ | 3 | 3 | 3 | 23 | 22 | 2 | — | — | — | — | 9 | 4 | 12 | 2 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 3 | SSW 3 | SSW 5 | — | — | NE 3 | E 5 | E 6 | — | ESE 4 | SE 4 | SW 6 | NE 4 | E 6 | E 7 | E 7 | ESE 8 | E 8 | ESE 9 | ESE 10 | ESE 11 |
| kJ | 2 | 7 | 25 | — | — | 4 | 34 | 119 | — | 8 | 15 | 228 | 11 | 47 | 146 | 311 | 585 | 588 | 1106 | 1736 | 2894 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 134 | 630 | 274 | 17 | 17 | 665 | 225 | 1180 | 1180 | 513 | 513 | 39 | 608 | 39 | 91 | 117 | 225 | 735 | 735 | 225 | 92 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Cupsogue surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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