Surf Forecasts:
Road K surf forecast from 15 Sep 2026:
- Best quality surf: Friday 18 Sep, 8AM (local time) - 3ft (0.9m), 5s period, SW swell with offshore winds.
- Most powerful swell: Sunday 20 Sep, 11AM (local time) - 4.5ft (1.4m), 6s period, SSW swell with 126 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 8AM (local time) - 3ft (0.9m), 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 0.9m and 5s period with a secondary swell of 0.7m 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 1.4m 6s and forecast to arrive on Sunday (Sep 20) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Monday (Sep 21) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Fri 18th Sep) | 3ft (0.9m) 5s |
| Best Surf | 8AM (Fri 18th Sep) | 3ft (0.9m) 5s |
| Most Powerful | 11AM (Sun 20th Sep) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Road K over the next 16 days.
The Lowdown
Hey guys, Rusty here with a look at what Road K has in store for us.
Straight up, it’s a dry spell to start. From Tuesday the 15th right through to Monday the 23rd, we’ve got barely anything. Cross and onshore winds, no real swell energy – it's a classic blank run for this area, so just be patient.
Thursday the 24th morning finally shows a flicker of life with 4ft swell out of the ESE, but it's nothing special. The wind is light from the NNE, making it clean at least. It's the first surfable window, but it's not one to write home about.
The one bright spot is way out at the end. Wednesday the 30th is the only true standout. The morning brings a fresh NNW offshore wind, 18 mph, cleaning up a solid 5ft swell from the East. The energy is strong. That afternoon cleans up even more with a lighter offshore and 4ft of East swell. This is your best bet by a long shot. That size with offshore wind all day at a sandbar like Road K should be a good time. It’s a long way off, so treat it as a promising one to watch.
Sunday the 29th afternoon shows a 5ft bump from the ENE in a cross-on wind – not perfect, but worth checking if the wind shifts.
So, the story is simple: a long wait, a couple of small windows, and one proper day on the 30th to keep hope alive.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Thu afternoon, min 14°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 23mm), heaviest during Sun morning. Warm (max 26°C on Fri afternoon, min 14°C on Sun night). Winds increasing (light winds from the NW on Fri morning, fresh winds from the SSW by Sun morning). | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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 9 | SE 9 | SE 9 | SE 9 | ESE 9 | ESE 7 | ESE 7 | ESE 12 | SW 5 | SSW 5 | SE 12 | SE 12 | E 5 | ESE 6 | ESE 5 | SSW 6 | SSW 6 | SE 10 | ENE 6 | E 6 | E 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 21 | 13 | 13 | 13 | 8 | 18 | 18 | 15 | 31 | 14 | 22 | 22 | 56 | 40 | 25 | 126 | 67 | 26 | 64 | 60 | 46 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | cross-on | cross-on | cross | cross-on | cross-on | cross | off | off | cross-off | cross | cross-on | on | cross-on | cross-off | cross-off | cross | cross-on | cross-on |
High Tide | 11:03AM1.09m | 11:24PM0.92m | 11:48AM1.03m | 00:11AM0.85m | 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 | ||||||||
Low Tide | 4:38PM0.14m | 4:41AM0.14m | 5:21PM0.20m | 5:23AM0.19m | 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 | ||||||||
 | |  |  | | | | |  |  | | | | |  |  |  |  | | | | |
 | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — |
 | — | 6:59 | — | — | 6:58 | — | — | 6:55 | — | — | 6:53 | — | — | 6:52 | — | — | 6:51 | — | — | 6:49 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 16 | 4 | — | — | — | — |
Temp °C | 16 | 17 | 17 | 18 | 19 | 20 | 21 | 22 | 22 | 21 | 26 | 22 | 16 | 16 | 18 | 20 | 21 | 18 | 15 | 18 | 18 |
Feels °C | 13 | 15 | 16 | 16 | 17 | 18 | 20 | 20 | 21 | 22 | 23 | 17 | 11 | 12 | 14 | 17 | 19 | 15 | 11 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | SE 9 | ENE 4 | E 4 | E 5 | E 5 | ESE 7 | ESE 7 | E 7 | ESE 7 | SSW 5 | SSW 5 | SE 12 | SE 12 | SE 8 | ESE 5 | ESE 7 | SSW 6 | S 5 | SE 9 | SE 9 | SE 9 |
| kJ | 21 | 7 | 3 | 4 | 4 | 18 | 18 | 9 | 9 | 14 | 7 | 21 | 21 | 18 | 25 | 15 | 67 | 20 | 12 | 22 | 12 |
Swell 2 Height (m) Direction Period (s) | S 6 | SE 9 | SE 9 | SE 9 | ESE 9 | SE 13 | ESE 13 | ESE 12 | ESE 12 | ESE 7 | ESE 7 | SSW 4 | ESE 9 | ESE 11 | ESE 7 | SE 11 | SE 11 | SE 10 | ESE 10 | SW 5 | E 8 |
| kJ | 3 | 13 | 13 | 13 | 8 | 7 | 16 | 15 | 15 | 9 | 9 | 2 | 7 | 13 | 20 | 30 | 29 | 26 | 10 | 1 | 11 |
Swell 3 Height (m) Direction Period (s) | S 7 | S 6 | SE 14 | SE 13 | SE 13 | SE 10 | SE 9 | SE 9 | SE 9 | ESE 12 | SE 12 | ESE 9 | SW 4 | — | ESE 11 | — | ESE 7 | E 8 | SSW 5 | — | S 5 |
| kJ | 1 | 1 | 8 | 7 | 7 | 4 | 3 | 3 | 3 | 14 | 22 | 7 | 1 | — | 12 | — | 9 | 5 | 3 | — | 1 |
Wind waves Height (m) Direction Period (s) | ENE 5 | — | — | — | SW 3 | SW 3 | SW 4 | SSW 4 | SW 5 | — | — | E 7 | E 5 | ESE 6 | S 4 | SSW 6 | — | NE 4 | ENE 6 | E 6 | E 5 |
| kJ | 14 | — | — | — | 2 | 1 | 5 | 10 | 31 | — | — | 22 | 56 | 40 | 16 | 126 | — | 29 | 64 | 60 | 46 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 859 | 854 | 918 | 789 | 1166 | 774 | 244 | 1166 | 142 | 36 | 36 | 313 | 1175 | 1175 | 273 | 282 | 3 | 271 | 208 | 208 | 263 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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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