Surf Forecasts:
Robert Moses State Park surf forecast from 15 Oct 2026:
- Best quality surf: Saturday 17 Oct, 2AM (local time) - 4.5ft (1.3m), 7s period, S swell with offshore winds.
- Most powerful swell: Friday 16 Oct, 8PM (local time) - 6ft (1.9m), 6s period, SSW swell with 255 kJ wave energy.
- Next surfable swell (1★+): Saturday 17 Oct, 2AM (local time) - 4.5ft (1.3m), 7s period with S swell.
Best Forecast Surf Conditions for Robert Moses State Park this week:
The surf forecast for Robert Moses State Park over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Oct 17) at 2AM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.2m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Robert Moses State Park in the next 16 days are 1.9m 6s and forecast to arrive on Friday (Oct 16) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Saturday (Oct 17) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sat 17th Oct) | 4.5ft (1.3m) 7s |
| Best Surf | 2AM (Sat 17th Oct) | 4.5ft (1.3m) 7s |
| Most Powerful | 8PM (Fri 16th Oct) | 6ft (1.9m) 6s |
Table - best surf conditions forecast for Robert Moses State Park over the next 16 days.
Short Range ForecastModerate rain (total 12mm), heaviest on Fri morning. Warm (max 24°C on Wed night, min 8°C on Sat morning). Winds increasing (light winds from the E on Thu afternoon, fresh winds from the NNW by Sat morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Tue afternoon, min 6°C on Sat night). Mainly fresh winds. | ||||||||||||||||||
Thursday 15 | Friday 16 | Saturday 17 | Sunday 18 | Monday 19 | Tuesday 20 | ||||||||||||||
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 6 | S 6 | SE 10 | SE 10 | S 5 | SSW 6 | S 7 | S 7 | S 7 | S 7 | SE 9 | WSW 3 | WSW 4 | ESE 10 | SSW 4 | SW 4 | ESE 9 | SE 9 | SE 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 24 | 10 | 15 | 15 | 102 | 167 | 154 | 46 | 15 | 4 | 3 | 7 | 8 | 10 | 8 | 12 | 9 | 13 | 28 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | on | cross-on | cross-on | off | off | off | off | cross-off | cross | cross | cross | cross-on | cross | cross | cross | cross-off |
High Tide | 10:37PM1.13m | 10:55AM1.33m | 11:26PM1.06m | 11:43AM1.26m | 00:19AM1.01m | 12:34PM1.22m | 1:12AM0.99m | 1:27PM1.19m | 2:06AM1.00m | 2:21PM1.19m | 3:01AM1.04m | 3:15PM1.20m | 3:55AM1.11m | ||||||
Low Tide | 4:22AM0.22m | 5:09PM0.20m | 4:58AM0.30m | 5:55PM0.28m | 5:42AM0.37m | 6:53PM0.33m | 6:43AM0.41m | 7:57PM0.33m | 8:01AM0.42m | 8:57PM0.29m | 9:09AM0.37m | 9:48PM0.23m | |||||||
 |  | |  |  | |  |  | | | | | | | | |  | | | |
 | — | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — | 7:09 | — | — |
 | 6:15 | — | 6:13 | — | — | 6:12 | — | — | 6:09 | — | — | 6:08 | — | — | 6:07 | — | — | 6:06 | — |
mm | — | — | — | — | 3 | — | 7 | 2 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 13 | 15 | 16 | 18 | 20 | 20 | 9 | 10 | 7 | 9 | 13 | 13 | 11 | 14 | 14 | 14 | 18 | 18 |
Feels °C | 22 | 9 | 13 | 12 | 14 | 17 | 17 | 1 | 1 | -2 | 4 | 7 | 8 | 7 | 10 | 9 | 12 | 15 | 16 |
Swell 1 Height (m) Direction Period (s) | S 6 | S 6 | S 5 | SE 10 | SE 9 | SE 9 | S 7 | S 7 | S 7 | S 7 | SE 9 | SE 9 | SE 9 | ESE 10 | SE 10 | ESE 10 | ESE 9 | SE 9 | SE 9 |
| kJ | 24 | 10 | 5 | 15 | 13 | 13 | 154 | 46 | 15 | 4 | 3 | 3 | 3 | 10 | 4 | 9 | 9 | 13 | 28 |
Swell 2 Height (m) Direction Period (s) | E 8 | ESE 10 | ENE 5 | E 7 | E 9 | E 8 | ESE 9 | ESE 9 | ESE 9 | SE 9 | — | — | E 5 | — | — | E 9 | — | — | — |
| kJ | 5 | 10 | 5 | 1 | 1 | 1 | 8 | 8 | 8 | 3 | — | — | 1 | — | — | 2 | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 10 | E 8 | SE 10 | ENE 7 | E 9 | — | E 8 | E 8 | SSE 7 | NE 5 | S 6 | S 7 | — | — | — | — | — | — | — |
| kJ | 4 | 5 | 15 | 5 | 2 | — | 1 | 1 | 5 | 1 | 1 | 1 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 3 | NNE 3 | NE 5 | SE 3 | S 5 | SSW 6 | WNW 4 | NNW 4 | NNW 4 | N 4 | W 2 | WSW 3 | WSW 4 | SW 3 | SSW 4 | SW 4 | SW 3 | SW 3 | — |
| kJ | 4 | 5 | 7 | 7 | 102 | 167 | 10 | 40 | 40 | 4 | 1 | 7 | 8 | 5 | 8 | 12 | 3 | 2 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 103 | 590 | 1197 | 590 | 1189 | 1231 | 0 | 1101 | 785 | 2324 | 821 | 2487 | 917 | 1216 | 963 | 350 | 724 | 207 | 111 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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Information about the Robert Moses State Park Surf forecast
The above surf forecast table for Robert Moses State Park provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Robert Moses State Park can be found by selecting the local surf guide option on the grey menu. Our Robert Moses State Park 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 (Robert Moses State Park) 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 Robert Moses State Park 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.
Robert Moses State Park is 10 km (6 miles) from West Islip. If you plan a vacation in Long Island New York, look for hotels and other accommodation in West Islip. West Islip has rooms for a wide range of budgets as well as car hire and transport links.
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