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Robert Moses State Park Surf Forecast
/ Long Island NY (34 breaks) / New York (44 breaks) /
Surf Forecasts:
Robert Moses State Park surfForecast / Long Island NY / USA
16 Day Weather and Surf, issued 7 am Sunday 31 May 2026 EDTForecast update in hr min s Forecast update imminent
Robert Moses State Park surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Robert Moses State Park sea temperature is
14.4° C
(Which is normal for this time of year)Robert Moses State Park surf forecast from 31 May 2026:
- Best quality surf: Monday 1 Jun, 5AM (local time) - 2ft (0.6m), 9s period, E swell with glassy winds.
- Most powerful swell: Sunday 31 May, 5PM (local time) - 3ft (0.9m), 10s period, E swell with 167 kJ wave energy.
- Next surfable swell (1★+): Monday 1 Jun, 5AM (local time) - 2ft (0.6m), 9s period with E 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 Monday (Jun 01) at 5AM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.6m and 5s. Another secondary swell of 0.5m and 3s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Robert Moses State Park in the next 16 days are 0.9m 10s and forecast to arrive on Sunday (May 31) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Wednesday (Jun 03) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 1st Jun) | 2ft (0.6m) 9s |
| Best Surf | 5AM (Mon 1st Jun) | 2ft (0.6m) 9s |
| Most Powerful | 5PM (Sun 31st May) | 3ft (0.9m) 10s |
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 ForecastMostly dry. Warm (max 20°C on Sun afternoon, min 11°C on Mon night). Winds increasing (calm on Sun night, fresh winds from the E by Mon night). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Fri night, min 15°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 31 | Monday 1 | Tuesday 2 | Wednesday 3 | Thursday 4 | Friday 5 | Saturday 6 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
E 10 | E 10 | E 9 | E 9 | E 9 | E 6 | E 6 | ESE 10 | ESE 9 | E 9 | E 9 | SE 7 | ESE 7 | ESE 8 | E 7 | E 7 | SSW 4 | SSW 5 | SE 10 | SE 10 | S 6 | |
200 | 167 | 85 | 57 | 125 | 72 | 50 | 18 | 49 | 16 | 16 | 12 | 37 | 58 | 40 | 40 | 30 | 39 | 25 | 43 | 43 | |
Wind (km/h) | |||||||||||||||||||||
cross-off | cross-on | cross | cross-off | cross-on | cross | glassy | cross-on | cross-off | cross-off | cross-on | cross | off | cross-on | cross-off | cross | cross-on | cross-off | cross-off | cross | glassy | |
High Tide | 8:12PM1.47m | 8:40AM1.16m | 8:49PM1.44m | 9:20AM1.13m | 9:26PM1.40m | 10:02AM1.10m | 10:03PM1.36m | 10:45AM1.09m | 10:44PM1.32m | 11:29AM1.09m | 11:27PM1.28m | 12:14PM1.11m | 00:14AM1.26m | ||||||||
Low Tide | 1:52PM0.16m | 2:39AM0.05m | 2:32PM0.18m | 3:18AM0.06m | 3:10PM0.21m | 3:56AM0.08m | 3:47PM0.24m | 4:32AM0.11m | 4:23PM0.27m | 5:09AM0.14m | 5:01PM0.31m | 5:48AM0.16m | 5:47PM0.34m | ||||||||
 |  |  | | |  | | |  | | | | | | | | | | | | | |
 | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — |
 | — | 8:15 | — | — | 8:16 | — | — | 8:17 | — | — | 8:17 | — | — | 8:19 | — | — | 8:20 | — | — | 8:20 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 16 | 20 | 20 | 18 | 19 | 14 | 16 | 17 | 17 | 19 | 20 | 18 | 22 | 23 | 23 | 24 | 26 | 27 | 26 | 29 | 30 |
11 | 15 | 17 | 16 | 17 | 8 | 14 | 13 | 14 | 14 | 16 | 15 | 20 | 21 | 22 | 21 | 22 | 24 | 25 | 28 | 27 | |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | SSW 5 | E 9 | SSW 5 | E 9 | E 5 | E 5 | ESE 9 | E 9 | ESE 4 | SE 7 | ESE 7 | ESE 8 | E 7 | E 7 | E 7 | SSW 5 | SE 10 | SE 10 | S 6 |
 kJ | 200 | 167 | 28 | 57 | 9 | 23 | 28 | 13 | 49 | 16 | 3 | 12 | 37 | 58 | 40 | 40 | 27 | 39 | 25 | 23 | 43 |
Swell 2 Height (m) Direction Period (s) | S 6 | — | E 9 | S 5 | S 9 | SSW 5 | E 8 | S 6 | SSE 8 | SSE 7 | E 9 | E 9 | — | SE 11 | SE 10 | SE 10 | SE 9 | E 8 | E 7 | E 7 | SE 9 |
| kJ | 3 | — | 85 | 14 | 2 | 5 | 23 | 7 | 11 | 4 | 16 | 6 | — | 5 | 33 | 17 | 14 | 19 | 9 | 4 | 21 |
Swell 3 Height (m) Direction Period (s) | S 9 | — | — | — | — | SE 9 | S 6 | ESE 10 | S 6 | SE 8 | SSE 7 | S 7 | SE 11 | S 7 | — | SE 8 | SE 7 | SE 8 | SSE 8 | E 7 | E 7 |
| kJ | 2 | — | — | — | — | 3 | 6 | 18 | 1 | 3 | 5 | 1 | 5 | 1 | — | 10 | 2 | 18 | 6 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | W 3 | SSW 4 | — | — | E 9 | E 6 | E 6 | — | SW 2 | E 4 | — | — | — | SSW 3 | SW 4 | SSW 4 | SSW 4 | WNW 3 | SSW 5 | SSW 4 | — |
| kJ | 1 | 18 | — | — | 125 | 72 | 50 | — | 1 | 3 | — | — | — | 3 | 7 | 3 | 30 | 2 | 24 | 43 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 47 | 4 | 0 | 272 | 4 | 0 | 273 | 0 | 310 | 724 | 171 | 67 | 193 | 0 | 35 | 69 | 0 | 69 | 111 | 0 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Robert Moses State Park 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 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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