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Road K Surf Forecast
/ Long Island NY (34 breaks) / New York (44 breaks) /
Surf Forecasts:
Road K surfForecast / Long Island NY / USA
16 Day Weather and Surf, issued 1 pm Sunday 17 May 2026 EDTForecast update in hr min s Forecast update imminent
Road K surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Road K sea temperature is
11.3° C
(Which is normal for this time of year)Best Forecast Surf Conditions for Road K this week:
The surf forecast for Road K over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (May 18) at 5AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.7m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Road K in the next 16 days are 1.7m 7s and forecast to arrive on Wednesday (May 20) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Thursday (May 21) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 18th May) | 2.5ft (0.7m) 8s |
| Best Surf | 5AM (Mon 18th May) | 2.5ft (0.7m) 8s |
| Most Powerful | 2AM (Wed 20th May) | 5.5ft (1.7m) 7s |
Table - best surf conditions forecast for Road K over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 26°C on Tue afternoon, min 19°C on Mon morning). Winds increasing (calm on Sun night, fresh winds from the SSW by Tue afternoon). | Days 5-7 Weather SummaryModerate rain (total 19mm), heaviest on Fri night. Warm (max 26°C on Wed afternoon, min 8°C on Fri night). Winds decreasing (fresh winds from the SW on Wed afternoon, light winds from the SSE by Thu afternoon). | ||||||||||||||||||||
Sun 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
SSE 8 | SSE 8 | SSE 7 | S 7 | SSW 5 | SSW 6 | SSW 6 | SSW 7 | SSW 7 | SSW 6 | S 6 | S 6 | SE 9 | SE 9 | SE 9 | SE 9 | SE 5 | SE 6 | SSW 6 | SSW 7 | SSW 7 | |
100 | 99 | 62 | 107 | 42 | 53 | 83 | 268 | 171 | 167 | 78 | 38 | 29 | 27 | 29 | 29 | 41 | 45 | 98 | 232 | 186 | |
Wind (km/h) | |||||||||||||||||||||
cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | off | cross-off | cross-on | cross-on | on | cross-on | cross-on | cross | cross | on | cross | |
High Tide | 8:54PM1.29m | 9:24AM1.00m | 9:46PM1.27m | 10:19AM0.98m | 10:40PM1.22m | 11:15AM0.96m | 11:36PM1.16m | 12:13PM0.94m | 00:33AM1.09m | 1:13PM0.92m | 1:33AM1.01m | 2:15PM0.92m | 2:34AM0.95m | ||||||||
Low Tide | 2:52AM-0.09m | 2:50PM-0.07m | 3:43AM-0.07m | 3:42PM-0.02m | 4:36AM-0.03m | 4:36PM0.04m | 5:33AM0.02m | 5:35PM0.11m | 6:33AM0.07m | 6:41PM0.17m | 7:37AM0.11m | 7:56PM0.20m | 8:39AM0.13m | ||||||||
 |  |  | |  | | | | | |  |  | |  | | |  |  |  | | | |
 | — | — | 5:30 | — | — | 5:28 | — | — | 5:28 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:24 |
 | 8:01 | — | — | 8:02 | — | — | 8:04 | — | — | 8:04 | — | — | 8:05 | — | — | 8:06 | — | — | 8:07 | — | 8:07 |
— | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — | 9 | 7 | 1 | 3 | 2 | |
Temp °C | 25 | 24 | 20 | 21 | 22 | 24 | 26 | 23 | 23 | 26 | 20 | 13 | 15 | 15 | 13 | 13 | 9 | 10 | 11 | 16 | 18 |
21 | 20 | 19 | 20 | 21 | 22 | 23 | 20 | 20 | 22 | 20 | 10 | 13 | 11 | 10 | 9 | 4 | 6 | 8 | 14 | 16 | |
Swell 1 Height (m) Direction Period (s) | SSE 8 | SSE 8 | SSE 7 | SE 18 | SE 8 | SE 9 | SE 8 | SE 9 | SE 9 | SE 9 | S 6 | S 6 | S 6 | S 6 | SE 9 | SE 9 | SE 5 | SE 6 | SE 6 | SE 10 | SSW 7 |
 kJ | 100 | 99 | 62 | 12 | 30 | 46 | 44 | 49 | 28 | 29 | 78 | 38 | 29 | 19 | 29 | 29 | 41 | 45 | 39 | 4 | 186 |
Swell 2 Height (m) Direction Period (s) | — | — | SSW 6 | — | SE 13 | SE 13 | SE 16 | SE 16 | SE 15 | SE 15 | SE 9 | SE 9 | SE 9 | SE 9 | S 6 | S 5 | SE 10 | SE 10 | SE 10 | SE 12 | SE 9 |
| kJ | — | — | 17 | — | 7 | 7 | 10 | 10 | 9 | 8 | 29 | 28 | 27 | 27 | 6 | 1 | 15 | 15 | 4 | 6 | 3 |
Swell 3 Height (m) Direction Period (s) | — | E 15 | S 15 | SE 18 | — | — | — | — | SE 15 | — | SE 14 | SE 14 | SE 14 | ESE 4 | SE 14 | SE 13 | SE 14 | SE 14 | SE 13 | — | SE 12 |
| kJ | — | 4 | 4 | 12 | — | — | — | — | 9 | — | 8 | 8 | 8 | 5 | 7 | 7 | 7 | 7 | 7 | — | 6 |
Wind waves Height (m) Direction Period (s) | SSW 7 | SSW 7 | — | S 7 | SSW 5 | SSW 6 | SSW 6 | SSW 7 | SSW 7 | SSW 6 | NNW 2 | NE 4 | ENE 4 | — | ESE 4 | SE 4 | — | SSW 4 | SSW 6 | SSW 7 | — |
| kJ | 70 | 56 | — | 107 | 42 | 53 | 83 | 268 | 171 | 167 | 1 | 6 | 3 | — | 6 | 18 | — | 7 | 98 | 232 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 84 | 3 | 368 | 718 | 254 | 259 | 134 | 117 | 134 | 107 | 0 | 0 | 61 | 61 | 682 | 1019 | 72 | 258 | 72 | 84 | 93 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 Road K 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 Road K Surf forecast
The above surf forecast table for Road K provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Road K can be found by selecting the local surf guide option on the grey menu. Our Road K 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 (Road K) 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 Road K 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.
Road K is 28 km (17 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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