Surf Forecasts:
Robert Moses State Park surf forecast from 9 Jun 2026:
- Best quality surf: Friday 12 Jun, 5AM (local time) - 2.5ft (0.8m), 7s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 10 Jun, 11PM (local time) - 5ft (1.6m), 6s period, S swell with 193 kJ wave energy.
- Next surfable swell (1★+): Friday 12 Jun, 5AM (local time) - 2.5ft (0.8m), 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 Friday (Jun 12) at 5AM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.1m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Robert Moses State Park in the next 16 days are 1.6m 6s and forecast to arrive on Wednesday (Jun 10) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Thursday (Jun 11) at 8PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 12th Jun) | 2.5ft (0.8m) 7s |
| Best Surf | 5AM (Fri 12th Jun) | 2.5ft (0.8m) 7s |
| Most Powerful | 11PM (Wed 10th Jun) | 5ft (1.6m) 6s |
Table - best surf conditions forecast for Robert Moses State Park over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 5mm), mostly falling on Thu night. Warm (max 30°C on Thu afternoon, min 17°C on Tue morning). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Fri morning. Warm (max 29°C on Sat afternoon, min 19°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 9 | Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||
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) | ESE 8 | SSW 4 | SSW 5 | S 5 | S 5 | S 6 | SSW 7 | S 7 | S 7 | S 6 | S 6 | S 6 | S 6 | S 6 | S 6 | S 6 | S 6 | SSE 6 | SSW 6 | ESE 8 | S 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6 | 28 | 74 | 34 | 82 | 171 | 158 | 128 | 73 | 48 | 36 | 35 | 18 | 17 | 19 | 19 | 36 | 6 | 6 | 6 | 44 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross | cross-off | on | cross-on | glassy | cross-off | off | cross | cross-on | cross-off | cross-on | cross-on | on |
High Tide | 2:38PM1.31m | 2:56AM1.19m | 3:34PM1.40m | 4:01AM1.20m | 4:33PM1.50m | 5:06AM1.22m | 5:31PM1.59m | 6:07AM1.27m | 6:27PM1.67m | 7:04AM1.31m | 7:20PM1.72m | 7:59AM1.35m | 8:13PM1.72m | ||||||||
Low Tide | 8:20AM0.14m | 9:12PM0.27m | 9:17AM0.10m | 10:14PM0.17m | 10:11AM0.05m | 11:12PM0.07m | 11:06AM0.01m | 00:08AM-0.02m | 12:01PM-0.03m | 1:04AM-0.10m | 12:58PM-0.06m | 1:59AM-0.16m | 1:55PM-0.08m | 2:53AM-0.19m | |||||||
 | |  |  | |  |  | | |  | | | | | | | |  | | |  | |
 | 5:22 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — |
 | — | 8:22 | — | — | 8:22 | — | — | 8:22 | — | — | 8:23 | — | — | 8:23 | — | — | 8:24 | — | — | 8:24 | — |
mm | — | — | — | — | — | 2 | — | — | 3 | 1 | — | 1 | — | — | — | — | — | — | — | — | 4 |
Temp °C | 18 | 19 | 18 | 18 | 20 | 21 | 26 | 30 | 28 | 26 | 28 | 23 | 25 | 29 | 28 | 24 | 26 | 27 | 18 | 18 | 20 |
Feels °C | 13 | 13 | 12 | 15 | 18 | 19 | 26 | 30 | 27 | 28 | 30 | 24 | 27 | 25 | 25 | 21 | 22 | 26 | 14 | 15 | 19 |
Swell 1 Height (m) Direction Period (s) | E 5 | ESE 8 | ESE 9 | E 7 | ESE 9 | E 9 | S 6 | E 10 | S 7 | S 6 | S 6 | S 6 | S 6 | SE 6 | S 6 | S 6 | ESE 8 | SSE 6 | SSE 6 | SSE 6 | ESE 8 |
| kJ | 2 | 6 | 8 | 1 | 7 | 2 | 120 | 2 | 73 | 48 | 36 | 35 | 18 | 9 | 19 | 19 | 6 | 6 | 3 | 3 | 6 |
Swell 2 Height (m) Direction Period (s) | ESE 8 | E 5 | E 5 | E 8 | E 8 | E 7 | E 9 | E 10 | SE 9 | SE 9 | ESE 9 | ESE 9 | SE 6 | ESE 8 | ESE 8 | ESE 8 | — | SSW 4 | SSW 6 | ESE 8 | — |
| kJ | 6 | 2 | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 8 | 8 | 6 | 7 | 7 | 7 | — | 3 | 6 | 6 | — |
Swell 3 Height (m) Direction Period (s) | SSE 7 | SE 7 | E 6 | — | — | — | — | — | — | — | — | ESE 9 | ESE 9 | E 3 | — | — | — | ESE 8 | ESE 8 | SSW 6 | — |
| kJ | 4 | 2 | 1 | — | — | — | — | — | — | — | — | 8 | 8 | 1 | — | — | — | 6 | 6 | 3 | — |
Wind waves Height (m) Direction Period (s) | SW 3 | SSW 4 | SSW 5 | S 5 | S 5 | S 6 | SSW 7 | S 7 | W 3 | — | ESE 3 | E 4 | ENE 3 | S 6 | NW 2 | WNW 2 | S 6 | — | — | ESE 3 | S 5 |
| kJ | 4 | 28 | 74 | 34 | 82 | 171 | 158 | 128 | 4 | — | 3 | 2 | 1 | 17 | 1 | 1 | 36 | — | — | 1 | 44 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 279 | 2332 | 326 | 839 | 1481 | 64 | 50 | 26 | 26 | 0 | 170 | 79 | 103 | 1601 | 103 | 917 | 1601 | 785 | 793 | 487 | 793 |
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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