Surf Forecasts:
Road K surf forecast from 11 Sep 2026:
- Best quality surf: Sunday 13 Sep, 11AM (local time) - 3.5ft (1.0m), 6s period, SSE swell with cross-offshore winds.
- Most powerful swell: Sunday 13 Sep, 8AM (local time) - 3.5ft (1.1m), 5s period, SSE swell with 69 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 11AM (local time) - 3.5ft (1.0m), 6s period with SSE 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 11AM. The primary swell is predicted to be 1.0m and 6s period with a secondary swell of 0.4m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Road K in the next 16 days are 1.1m 5s and forecast to arrive on Sunday (Sep 13) at 8AM. 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+) | 11AM (Sun 13th Sep) | 3.5ft (1.0m) 6s |
| Best Surf | 11AM (Sun 13th Sep) | 3.5ft (1.0m) 6s |
| Most Powerful | 8AM (Sun 13th Sep) | 3.5ft (1.1m) 5s |
Table - best surf conditions forecast for Road K over the next 16 days.
The Lowdown
G’day, I’m Rusty, and I’ve been looking over what’s coming up for Road K. To be honest, it’s a pretty lean stretch of waves ahead. We’ve got a long gap of days where the surf just isn’t doing us any favours, and it’s not until the very end of the period that we finally see something worth paddling out for.
The first sign of any surfable action doesn’t even arrive until Sunday the 13th of September, but even then it’s just not up to much. Sunday afternoon sees a tiny 3ft swell from the SSE, with a short 6-second period and weak energy (98). Winds are light and cross-off, so it’s clean, but the waves are small and ordinary. Honestly, it’s more of a stretch than a session.
Then we hit a dead zone. From Monday the 14th right through to Thursday the 24th of September, it’s one poor surf call after another. Day after day of tiny swells, cross-shore winds, or onshore slop. There are some mornings with clean offshore winds – like Monday the 14th with a fresh NNW breeze – but the swell is barely 1ft to 2ft. It’s just not enough to push anything rideable. That’s over a week and a half of pretty much nothing.
Around Sunday the 20th of September, the swell starts to pick up a bit, with 4ft to 5ft from the east, but the winds are messy and cross-shore or cross-off. The energy jumps into the moderate range (256 to 512), but with those lumpy, choppy conditions and short periods (7-9 seconds), it’s more of a washing machine than a wave face. For a sandbar like Road K, this kind of wind and swell combo just looks rough – honestly, this setup might be more interesting for kite surfing than paddle surfing.
Finally, on Friday the 25th of September, we get our one true standout. Friday morning at Road K, the wind swings to a clean offshore NNW breeze at 12 mph. The swell is 4ft from the ESE, with a 9-second period and moderate energy (243). The waves are clean, the conditions are “expect good surf conditions” – that’s the best call we’ve had in this whole outlook. It’s not massive, but it’s rideable, lined up, and the offshore wind will keep the faces smooth. The water temp is around 71°, about average for the time of year. Keep in mind, though, crowds are often a factor at Road K, so expect some company out there.
Friday afternoon the wind shifts cross-on and it goes ordinary again. Saturday the 26th is a write-off with strong, messy winds.
So, the one to circle is Friday morning, September the 25th. That’s your window. Everything else is either flat, messy, or too small to bother with.
Rusty.
Short Range ForecastHeavy rain (total 59mm), heaviest during Sun afternoon. Warm (max 24°C on Sun night, min 18°C on Sat morning). Winds increasing (calm on Fri afternoon, fresh winds from the NNW by Sun night). | Days 4-6 Weather SummarySome drizzle, heaviest during Mon morning. Warm (max 22°C on Mon afternoon, min 14°C on Mon night). Winds decreasing (fresh winds from the NNW on Mon morning, light winds from the ESE by Wed night). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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 6 | S 6 | S 6 | SE 9 | SE 10 | SE 10 | SSE 6 | SSE 6 | SSE 6 | SE 9 | SE 8 | SE 8 | E 6 | E 5 | E 5 | ESE 5 | ESE 8 | ESE 8 | ESE 8 | ESE 6 | ESE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 24 | 17 | 19 | 14 | 15 | 24 | 65 | 68 | 43 | 20 | 58 | 33 | 69 | 21 | 12 | 9 | 11 | 33 | 33 | 23 | 29 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross-off | cross-on | on | on | cross-off | off | cross | off | off | cross-off | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 8:09AM1.16m | 8:30PM1.16m | 8:53AM1.17m | 9:14PM1.12m | 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 | |||||||
Low Tide | 2:04PM0.02m | 2:22AM0.01m | 2:44PM0.02m | 2:55AM0.02m | 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 | ||||||||
 |  |  | | |  |  |  | | | | | | | | | | | | |  | |
 | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — |
 | — | 7:06 | — | — | 7:04 | — | — | 7:02 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:55 | — |
mm | — | — | — | — | — | 2 | 34 | 23 | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 23 | 22 | 20 | 22 | 22 | 22 | 22 | 24 | 18 | 22 | 21 | 16 | 17 | 17 | 16 | 17 | 17 | 18 | 20 | 20 |
Feels °C | 18 | 21 | 21 | 18 | 21 | 21 | 22 | 24 | 25 | 15 | 18 | 14 | 12 | 15 | 15 | 15 | 16 | 15 | 19 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | S 6 | S 6 | S 6 | SSW 6 | SE 10 | SE 10 | SSE 6 | SSE 6 | SSE 6 | SE 6 | SE 8 | SE 8 | S 6 | ESE 9 | E 5 | ESE 5 | ESE 5 | ESE 8 | ESE 8 | ESE 6 | ESE 7 |
| kJ | 24 | 17 | 19 | 6 | 15 | 24 | 65 | 68 | 43 | 16 | 58 | 33 | 3 | 8 | 12 | 9 | 11 | 33 | 33 | 23 | 29 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | ESE 9 | SE 9 | SSW 5 | — | SE 10 | SE 9 | SE 9 | SE 9 | ENE 4 | S 6 | SE 10 | S 6 | E 7 | SE 9 | ESE 8 | SE 13 | ESE 13 | ESE 12 | ESE 12 |
| kJ | 15 | 14 | 8 | 14 | 3 | — | 33 | 31 | 29 | 20 | 2 | 3 | 4 | 3 | 4 | 3 | 11 | 7 | 16 | 15 | 15 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 11 | SSE 6 | SSE 6 | — | — | — | — | SW 5 | SSW 5 | SE 15 | SE 15 | SE 15 | ESE 9 | E 7 | SE 10 | — | — | ESE 9 | SE 9 |
| kJ | — | — | 4 | 4 | 4 | — | — | — | — | 6 | 2 | 8 | 8 | 8 | 8 | 4 | 4 | — | — | 8 | 3 |
Wind waves Height (m) Direction Period (s) | NNE 3 | — | — | — | — | S 4 | — | — | SW 3 | N 3 | — | NE 4 | E 6 | E 5 | — | — | — | — | — | SSW 2 | SSW 3 |
| kJ | 1 | — | — | — | — | 15 | — | — | 5 | 5 | — | 29 | 69 | 21 | — | — | — | — | — | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 718 | 36 | 1166 | 1175 | 273 | 67 | 0 | 61 | 36 | 0 | 313 | 729 | 1019 | 830 | 1166 | 1166 | 136 | 134 | 245 | 56 |
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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