Surf Forecasts:
Road K surf forecast from 13 Sep 2026:
- Best quality surf: Sunday 13 Sep, 2PM (local time) - 1.5ft (0.4m), 10s period, SE swell with offshore winds.
- Most powerful swell: Sunday 20 Sep, 11AM (local time) - 5ft (1.5m), 6s period, SW swell with 154 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 2PM (local time) - 1.5ft (0.4m), 10s period with SE 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 Sunday (Sep 13) at 2PM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.7m and 5s. Another secondary swell of 0.6m and 6s 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 1.5m 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 0.8m 4s period and expected on Tuesday (Sep 15) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sun 13th Sep) | 1.5ft (0.4m) 10s |
| Best Surf | 2PM (Sun 13th Sep) | 1.5ft (0.4m) 10s |
| Most Powerful | 11AM (Sun 20th Sep) | 5ft (1.5m) 6s |
Table - best surf conditions forecast for Road K over the next 16 days.
The Lowdown
Alright, I’ll be honest with ya. We’re looking at Road K for the whole 16-day stretch, and it’s a rough one. There’s a long, empty gap up front with nothing worth paddling for, and the rest is mostly a bust for surfers.
We’ve got a dry run from the 13th straight through the 19th. Days of tiny, weak swell, choppy cross-onshore winds, and not much going on. On Sunday the 13th, there’s a brief afternoon window with a 3ft swell out of the SSE and a light cross-off breeze that cleans it up a bit – the combined energy is 112 (moderate), but the wave comment says “surfable waves but very ordinary conditions”. That’s the high point for a long while, and it ain’t much.
Water temp on the morning of the 13th is about 71°, a touch warmer than average for this time of year, but that’s just a footnote.
The first real chance shows up late in the run. On Friday the 25th of September, we see a proper sized groundswell from the ESE. The morning has 6ft swell (9 second period) with a cross-off breeze and clean conditions. The combined energy hits 417 (strong). Then Saturday the 26th morning pushes it to 8ft (10 second period) with a combined energy of 1623 (very strong). That’s a serious swell, but the wind turns cross-shore and it gets lumpy and choppy. At over 5ft, it’s too big for beginners, and at 8ft it’s for experts only.
Because the wind is cross-shore and it’s a sandbar, that strong swell is messy – the combined energy is huge, but the quality is poor. Honestly, with that kind of power and lumpy conditions, it looks more like a kite session than a surf session.
The only other glimmer is Monday the 28th morning: 4ft ESE swell (8 second period), combined energy 246 (moderate), with a light cross-off breeze and clean conditions. The wave comment says “marginal surf forecast or questionable tide conditions”. It’s rideable, but nothing special.
Road K is a very consistent sandbar exposed to the swell, and crowds are often around. But for this forecast, it doesn’t matter – the quality just isn’t there. There are no standout, clean, rippable days in this outlook. It’s a poor 16 days for surf.
Rusty.
Short Range ForecastHeavy rain (total 21mm), heaviest during Sun afternoon. Warm (max 23°C on Sun night, min 15°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Thu night. Warm (max 21°C on Thu morning, min 17°C on Wed morning). Winds increasing (light winds from the S on Wed morning, fresh winds from the NE by Fri morning). | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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) | S 5 | SSE 6 | SSE 6 | SE 9 | SE 9 | SE 9 | ENE 6 | E 6 | E 5 | ESE 5 | E 7 | ESE 8 | E 8 | E 7 | E 7 | ESE 7 | SE 12 | SE 12 | ESE 7 | ESE 7 | ESE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 50 | 50 | 33 | 28 | 38 | 26 | 42 | 32 | 12 | 9 | 10 | 51 | 44 | 27 | 23 | 16 | 22 | 21 | 49 | 49 | 42 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross | off | off | cross-off | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-on | cross | cross-on | on | on |
High Tide | 9:36AM1.16m | 9:57PM1.06m | 10:20AM1.13m | 10:40PM0.99m | 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 | |||||||
Low Tide | 3:22PM0.05m | 3:29AM0.05m | 3:59PM0.09m | 4:04AM0.09m | 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 | ||||||||
 |  |  |  | | | | | | | | | |  |  | | | | | |  | |
 | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — |
 | — | 7:02 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:55 | — | — | 6:53 | — | — | 6:52 | — |
mm | 11 | 10 | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — |
Temp °C | 22 | 22 | 23 | 19 | 22 | 21 | 16 | 17 | 17 | 17 | 19 | 20 | 21 | 21 | 21 | 18 | 20 | 19 | 18 | 19 | 19 |
Feels °C | 23 | 23 | 26 | 12 | 16 | 14 | 13 | 15 | 15 | 17 | 17 | 19 | 19 | 18 | 19 | 14 | 17 | 14 | 15 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SSE 6 | SSE 6 | S 6 | SE 9 | SE 9 | ESE 9 | E 6 | E 5 | ESE 5 | ESE 5 | ESE 8 | E 8 | E 7 | E 7 | ESE 7 | ESE 7 | ESE 6 | ESE 7 | ESE 7 | ESE 7 |
| kJ | 33 | 50 | 33 | 17 | 38 | 26 | 8 | 32 | 12 | 9 | 9 | 51 | 44 | 27 | 23 | 16 | 9 | 14 | 49 | 49 | 42 |
Swell 2 Height (m) Direction Period (s) | — | SE 9 | SE 9 | SE 9 | S 6 | S 6 | ESE 7 | ESE 9 | ESE 9 | E 7 | E 7 | SE 13 | SE 13 | ESE 12 | SSW 3 | ESE 12 | SE 12 | SE 12 | SE 12 | ESE 11 | ESE 11 |
| kJ | — | 31 | 29 | 28 | 6 | 3 | 5 | 8 | 8 | 4 | 10 | 7 | 25 | 15 | 1 | 14 | 22 | 21 | 21 | 13 | 12 |
Swell 3 Height (m) Direction Period (s) | — | SE 9 | — | SE 6 | — | SE 15 | SSE 7 | SSE 7 | E 7 | SE 10 | SE 10 | — | ESE 9 | SE 9 | ESE 12 | E 6 | ESE 9 | SE 9 | — | — | — |
| kJ | — | 31 | — | 9 | — | 8 | 5 | 4 | 4 | 4 | 4 | — | 8 | 3 | 15 | 3 | 8 | 12 | — | — | — |
Wind waves Height (m) Direction Period (s) | S 5 | — | — | N 3 | NNW 3 | NE 4 | ENE 6 | — | — | — | — | SSW 2 | SW 3 | SSW 3 | — | — | ENE 4 | E 4 | — | — | S 4 |
| kJ | 50 | — | — | 8 | 4 | 21 | 42 | — | — | — | — | 1 | 1 | 4 | — | — | 7 | 4 | — | — | 26 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 67 | 0 | 136 | 755 | 718 | 313 | 859 | 851 | 798 | 854 | 1166 | 174 | 136 | 244 | 173 | 718 | 851 | 718 | 263 | 852 | 273 |
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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