Surf Forecasts:
Road K surf forecast from 11 Aug 2026:
- Best quality surf: Monday 17 Aug, 2PM (local time) - 5ft (1.6m), 8s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 17 Aug, 5AM (local time) - 8ft (2.4m), 8s period, SSW swell with 623 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 11PM (local time) - 2.5ft (0.8m), 5s period with SSW 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 Thursday (Aug 13) at 11PM. The primary swell is predicted to be 0.8m and 5s period with a secondary swell of 0.2m and 9s. 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 2.4m 8s and forecast to arrive on Monday (Aug 17) 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 0.6m 4s period and expected on Saturday (Aug 15) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 13th Aug) | 2.5ft (0.8m) 5s |
| Best Surf | 2PM (Mon 17th Aug) | 5ft (1.6m) 8s |
| Most Powerful | 5AM (Mon 17th Aug) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Road K over the next 16 days.
The Lowdown
Righto, let’s take a look at what’s cooking for Road K. I’ve got to be straight with you—this stretch isn’t exactly firing for the next coupla weeks. The first recommendation doesn’t kick in until Monday morning the 17th of August, so you’re looking at nearly a week of flatness or junk. That’s a long, quiet gap. Before that, it’s all small, short-period slop and onshore mess, not worth paddling out for.
Now, come the 17th, we finally get a pulse. The standout here is the Monday morning session at Road K (a sandbar). Swell hits 7 ft from the SSW with an 8-second period, giving a moderate combined energy of 472. It’s clean under a moderate NW cross-offshore breeze. That’s the best of the whole run—decent size, clean lines, and a good direction. It’s a sandbar, so expect it to hold shape with that period. Keep in mind, this is a beginner-level spot, and with 7 ft swell, it’s pushing into expert territory, so it’s not for the groms. Wave energy is solid but not thumping. The water temp sits at 75°, which is a touch warmer than usual for August.
Monday afternoon looks good too: 5 ft from the SSW, period 8 seconds, cleaner with a light offshore from the NW. That’s your second-best window.
After that, it fades fast. Tuesday the 18th through to the end of the run is tiny—stuff under 3 ft, mostly onshore or cross-onshore, short period, weak energy. Nothing to get excited about. A few windows on the 23rd and 24th show small long-period groundswell (13 seconds!) from the SE, but at 1.0 ft to 1 ft, it’s barely a ripple. That kind of period would be epic on a point or reef, but on a sandbar in tiny surf, it’s just a long wait between knee-high sets.
So, the plan: mark your calendar for Monday the 17th of August. Hit the morning or early afternoon for the only real waves in this outlook. The rest? It’s a waiting game. The breaks here are consistent by nature, so this blank run won’t last forever.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Tue night. Warm (max 28°C on Tue afternoon, min 19°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Sun night. Warm (max 27°C on Fri afternoon, min 18°C on Sat morning). Winds increasing (calm on Sat afternoon, fresh winds from the SW by Sun night). | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 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 | SSW 6 | SSW 5 | S 5 | SSW 5 | SSW 4 | SW 6 | SSW 6 | SSW 5 | S 5 | S 5 | S 6 | S 6 | S 7 | S 8 | S 7 | SSW 4 | SSW 7 | SSW 8 | SSW 8 | S 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 23 | 25 | 22 | 14 | 11 | 32 | 84 | 36 | 20 | 14 | 14 | 20 | 19 | 38 | 40 | 25 | 28 | 483 | 472 | 238 | 106 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | off | off | cross-on | cross | cross | cross-on | off | off | off | cross-off | cross-off | on | cross-on | cross-on | cross-on | cross-on | cross-off | off | cross-off |
High Tide | 7:14PM1.23m | 7:43AM1.05m | 8:05PM1.24m | 8:32AM1.10m | 8:53PM1.22m | 9:20AM1.12m | 9:40PM1.18m | 10:07AM1.12m | 10:26PM1.12m | 10:53AM1.11m | 11:12PM1.04m | 11:39AM1.07m | 11:58PM0.96m | ||||||||
Low Tide | 12:27PM0.04m | 1:27AM0.01m | 1:25PM0.01m | 2:12AM-0.02m | 2:16PM-0.01m | 2:53AM-0.03m | 3:03PM0.00m | 3:31AM-0.02m | 3:47PM0.03m | 4:08AM0.02m | 4:30PM0.08m | 4:45AM0.06m | 5:14PM0.15m | ||||||||
 |  |  |  | |  |  | |  | | | | | | | | |  | | | | |
 | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — |
 | — | 7:53 | — | — | 7:52 | — | — | 7:51 | — | — | 7:50 | — | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — |
mm | — | — | 8 | 5 | — | 1 | 2 | 1 | — | — | — | — | — | — | — | — | — | 11 | — | — | — |
Temp °C | 24 | 28 | 28 | 21 | 25 | 25 | 24 | 27 | 27 | 22 | 27 | 26 | 20 | 22 | 22 | 23 | 23 | 24 | 24 | 27 | 26 |
Feels °C | 26 | 29 | 28 | 22 | 24 | 24 | 24 | 27 | 28 | 19 | 22 | 21 | 19 | 21 | 20 | 20 | 20 | 21 | 25 | 28 | 24 |
Swell 1 Height (m) Direction Period (s) | S 6 | ESE 9 | SSW 5 | S 5 | SSW 5 | ESE 8 | SSW 6 | SE 8 | SSW 5 | S 5 | ESE 9 | S 6 | S 6 | S 7 | S 8 | S 7 | SSE 9 | — | SSW 8 | SSW 8 | S 7 |
| kJ | 23 | 8 | 22 | 14 | 9 | 7 | 72 | 3 | 20 | 14 | 9 | 20 | 19 | 38 | 40 | 25 | 7 | — | 472 | 238 | 106 |
Swell 2 Height (m) Direction Period (s) | SE 9 | E 8 | SE 9 | SE 8 | ESE 8 | SE 14 | SE 8 | SE 10 | ESE 9 | ESE 9 | SE 13 | ESE 9 | SE 9 | ENE 5 | E 5 | SE 9 | — | — | — | — | — |
| kJ | 3 | 1 | 3 | 3 | 7 | 8 | 3 | 4 | 8 | 9 | 7 | 8 | 3 | 5 | 2 | 3 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | E 8 | — | E 12 | SE 11 | — | SE 11 | SE 10 | SE 14 | SE 13 | SE 13 | — | E 12 | SE 12 | SE 9 | SE 9 | — | — | — | — | — | — |
| kJ | 1 | — | 3 | 5 | — | 5 | 4 | 7 | 7 | 7 | — | 3 | 6 | 3 | 3 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 4 | SSW 6 | — | NNE 2 | SSW 5 | SSW 4 | SW 6 | SSW 6 | — | — | S 5 | — | NE 4 | — | — | SW 3 | SSW 4 | SSW 7 | — | NW 3 | NNW 3 |
| kJ | 3 | 25 | — | 1 | 11 | 32 | 84 | 36 | — | — | 14 | — | 12 | — | — | 1 | 28 | 483 | — | 2 | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3405 | 2503 | 833 | 2365 | 3405 | 718 | 31 | 198 | 36 | 636 | 682 | 718 | 851 | 861 | 854 | 1175 | 2531 | 131 | 3 | 0 | 72 |
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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