Surf Forecasts:
Road K surf forecast from 17 Sep 2026:
- Best quality surf: Wednesday 23 Sep, 11PM (local time) - 11ft (3.5m), 10s period, ESE swell with cross-shore winds.
- Most powerful swell: Thursday 24 Sep, 5AM (local time) - 11ft (3.5m), 11s period, E swell with 2,914 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 8AM (local time) - 3.5ft (1.1m), 5s period with SW 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 Friday (Sep 18) at 8AM. The primary swell is predicted to be 1.1m and 5s period with a secondary swell of 0.8m and 5s. Another secondary swell of 0.3m and 7s is also forecast. 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 3.5m 11s and forecast to arrive on Thursday (Sep 24) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Sep 19) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Fri 18th Sep) | 3.5ft (1.1m) 5s |
| Best Surf | 11PM (Wed 23rd Sep) | 11ft (3.5m) 10s |
| Most Powerful | 5AM (Thu 24th Sep) | 11ft (3.5m) 11s |
Table - best surf conditions forecast for Road K over the next 16 days.
Short Range ForecastMostly dry. Warm (max 26°C on Fri afternoon, min 14°C on Sat morning). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Sun night. Warm (max 21°C on Sun night, min 13°C on Sun night). Winds decreasing (strong winds from the SSW on Sun night, light winds from the ENE by Mon afternoon). | ||||||||||||||||||||
Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | |||||||||||||||
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) | SE 13 | E 7 | SW 5 | SSW 5 | SE 12 | SE 12 | E 6 | E 6 | ESE 8 | SE 11 | SE 10 | SSW 6 | SSW 6 | E 6 | E 7 | E 7 | E 8 | E 8 | E 9 | ESE 10 | ESE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 25 | 17 | 43 | 22 | 22 | 21 | 62 | 120 | 58 | 18 | 28 | 154 | 37 | 88 | 217 | 411 | 692 | 710 | 1483 | 2223 | 2894 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | off | off | cross-off | cross | cross-on | cross-on | on | on | off | cross-off | cross | cross | cross-off | cross | cross | cross | cross | cross |
High Tide | 12:36PM0.98m | 1:03AM0.79m | 1:31PM0.93m | 2:03AM0.75m | 2:31PM0.90m | 3:07AM0.74m | 3:33PM0.90m | 4:08AM0.77m | 4:30PM0.93m | 5:01AM0.84m | 5:20PM0.97m | 5:46AM0.91m | 6:05PM1.01m | ||||||||
Low Tide | 6:08PM0.26m | 6:10AM0.25m | 7:02PM0.30m | 7:03AM0.29m | 8:03PM0.32m | 8:04AM0.31m | 9:09PM0.31m | 9:07AM0.30m | 10:11PM0.28m | 10:10AM0.27m | 11:03PM0.23m | 11:08AM0.21m | 11:47PM0.16m | ||||||||
 | |  |  | | | | | |  |  |  | | | | | |  | | | | |
 | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — |
 | — | 6:55 | — | — | 6:53 | — | — | 6:52 | — | — | 6:51 | — | — | 6:49 | — | — | 6:47 | — | — | 6:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | 2 | 13 | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 22 | 21 | 26 | 24 | 15 | 16 | 16 | 17 | 19 | 21 | 15 | 19 | 18 | 15 | 16 | 15 | 15 | 15 | 14 |
Feels °C | 22 | 20 | 20 | 21 | 23 | 20 | 11 | 12 | 12 | 13 | 14 | 16 | 10 | 16 | 15 | 10 | 11 | 7 | 6 | 7 | 7 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 7 | E 7 | SSW 5 | SSW 5 | ESE 7 | SE 8 | E 6 | ESE 11 | SE 11 | SE 10 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | — | — | — | — | — | — |
| kJ | 20 | 17 | 8 | 22 | 9 | 9 | 11 | 81 | 12 | 18 | 28 | 154 | 37 | 18 | 3 | — | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | SE 13 | ESE 12 | ESE 12 | ESE 7 | ESE 7 | SE 12 | SE 12 | ESE 12 | — | ESE 7 | ESE 7 | SE 9 | SE 10 | SE 9 | — | — | — | — | — | — | — |
| kJ | 25 | 15 | 15 | 10 | 9 | 21 | 21 | 13 | — | 10 | 9 | 31 | 27 | 14 | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | ESE 12 | SE 12 | SSW 4 | — | — | — | — | ESE 7 | ESE 7 | ESE 8 | — | — | — | — | — | — | — | — |
| kJ | 3 | 3 | 3 | 14 | 22 | 2 | — | — | — | — | 9 | 4 | 6 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 3 | SSW 4 | SW 5 | NNW 2 | — | NE 3 | E 6 | E 6 | ESE 8 | ESE 4 | SE 4 | — | NE 4 | E 6 | E 7 | E 7 | E 8 | E 8 | E 9 | ESE 10 | ESE 11 |
| kJ | 3 | 8 | 43 | 1 | — | 9 | 62 | 120 | 58 | 11 | 14 | — | 23 | 88 | 217 | 411 | 692 | 710 | 1483 | 2223 | 2894 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 151 | 642 | 260 | 0 | 0 | 677 | 208 | 1175 | 1174 | 528 | 528 | 56 | 621 | 56 | 75 | 101 | 208 | 718 | 718 | 208 | 76 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
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.
Nearest