Surf Forecasts:
Road K surf forecast from 17 Aug 2026:
- Best quality surf: Monday 17 Aug, 8PM (local time) - 4ft (1.2m), 7s period, S swell with offshore winds.
- Most powerful swell: Monday 17 Aug, 2PM (local time) - 5.5ft (1.7m), 7s period, S swell with 255 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 8PM (local time) - 4ft (1.2m), 7s period with S swell.
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 (Aug 17) at 8PM. The primary swell is predicted to be 1.2m and 7s period. The wind is predicted to be offshore 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 Monday (Aug 17) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Tuesday (Aug 18) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Mon 17th Aug) | 4ft (1.2m) 7s |
| Best Surf | 8PM (Mon 17th Aug) | 4ft (1.2m) 7s |
| Most Powerful | 2PM (Mon 17th Aug) | 5.5ft (1.7m) 7s |
Table - best surf conditions forecast for Road K over the next 16 days.
Short Range ForecastHeavy rain (total 24mm), heaviest during Mon morning. Warm (max 26°C on Wed afternoon, min 21°C on Sun night). Winds decreasing (fresh winds from the SSE on Mon morning, calm by Tue afternoon). | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Fri night. Warm (max 26°C on Wed night, min 20°C on Sat morning). Wind will be generally light. | ||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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 5 | S 6 | S 6 | S 6 | SSE 7 | SSE 7 | SE 8 | SE 7 | SE 7 | SE 9 | SE 9 | SE 8 | SE 9 | SE 9 | SE 8 | E 5 | SE 8 | SE 8 | SE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 34 | 199 | 163 | 86 | 84 | 69 | 38 | 27 | 34 | 39 | 19 | 17 | 12 | 19 | 18 | 22 | 16 | 15 | 16 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-off | off | off | cross-on | cross | glassy | cross-on | cross-on | cross | on | cross | cross | cross-on | cross | cross-off | cross-off | glassy |
High Tide | 11:12PM1.04m | 11:39AM1.07m | 11:58PM0.96m | 12:27PM1.02m | 00:46AM0.87m | 1:17PM0.98m | 1:39AM0.80m | 2:13PM0.94m | 2:38AM0.76m | 3:12PM0.92m | 3:41AM0.74m | 4:11PM0.94m | 4:40AM0.76m | ||||||
Low Tide | 4:45AM0.06m | 5:14PM0.15m | 5:24AM0.12m | 6:01PM0.21m | 6:06AM0.17m | 6:52PM0.27m | 6:53AM0.22m | 7:48PM0.31m | 7:44AM0.26m | 8:52PM0.33m | 8:39AM0.28m | 10:06PM0.32m | |||||||
 |  |  |  |  |  |  | | | |  | |  |  | | | | |  | |
 | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 7:46 | — | 7:45 | — | — | 7:44 | — | — | 7:43 | — | — | 7:40 | — | — | 7:39 | — | — | 7:37 | — |
mm | 5 | 18 | 1 | — | — | — | — | — | — | — | 1 | 1 | 3 | — | — | 5 | 1 | — | — |
Temp °C | 23 | 23 | 24 | 22 | 23 | 25 | 25 | 24 | 26 | 26 | 21 | 22 | 23 | 21 | 22 | 22 | 21 | 20 | 21 |
Feels °C | 19 | 22 | 27 | 22 | 24 | 26 | 26 | 26 | 26 | 26 | 19 | 24 | 27 | 21 | 22 | 21 | 22 | 19 | 24 |
Swell 1 Height (m) Direction Period (s) | — | — | S 6 | S 6 | SSE 7 | SSE 7 | S 7 | SE 7 | SE 7 | SE 9 | SW 5 | SSW 5 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | E 5 |
| kJ | — | — | 163 | 86 | 84 | 69 | 32 | 27 | 34 | 39 | 5 | 9 | 12 | 19 | 18 | 17 | 16 | 15 | 14 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | E 4 | E 4 | SE 8 | S 6 | SSW 6 | S 4 | SE 9 | SE 8 | SSW 5 | S 5 | S 5 | S 5 | SE 13 | SE 13 | SE 7 |
| kJ | — | — | — | — | 4 | 3 | 38 | 20 | 12 | 8 | 19 | 17 | 5 | 2 | 2 | 2 | 7 | 7 | 14 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SE 13 | SE 12 | SSE 11 | SE 10 | SSE 10 | SSE 6 | SSE 6 | ESE 6 | ESE 7 | E 8 | E 7 | SE 14 | — | SE 9 | ESE 13 |
| kJ | — | — | — | — | 7 | 6 | 12 | 15 | 9 | 4 | 10 | 3 | 4 | 4 | 1 | 8 | — | 3 | 16 |
Wind waves Height (m) Direction Period (s) | S 5 | S 6 | — | NNE 3 | NE 4 | — | — | — | — | — | — | — | — | ENE 3 | E 4 | E 5 | E 4 | E 4 | — |
| kJ | 34 | 199 | — | 1 | 4 | — | — | — | — | — | — | — | — | 4 | 12 | 22 | 9 | 10 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1640 | 32 | 2 | 0 | 0 | 84 | 17 | 0 | 214 | 140 | 851 | 1759 | 271 | 636 | 851 | 136 | 191 | 892 | 0 |
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 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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