
Surf Forecasts:
Road K surf forecast from 10 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 11AM (local time) - 3ft (0.9m), 5s period, SSW swell with offshore winds.
- Most powerful swell: Sunday 16 Aug, 11PM (local time) - 7ft (2.2m), 7s period, SSW swell with 503 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 11AM (local time) - 3ft (0.9m), 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 Tuesday (Aug 11) at 11AM. The primary swell is predicted to be 0.9m and 5s period with a secondary swell of 0.1m 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 2.2m 7s and forecast to arrive on Sunday (Aug 16) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 5s period and expected on Tuesday (Aug 11) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Tue 11th Aug) | 3ft (0.9m) 5s |
| Best Surf | 11AM (Tue 11th Aug) | 3ft (0.9m) 5s |
| Most Powerful | 11PM (Sun 16th Aug) | 7ft (2.2m) 7s |
Table - best surf conditions forecast for Road K over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down what’s happening at Road K.
We’re looking at a pretty quiet 16-day stretch overall. The first week is mostly small and weak, with a few windows of clean but tiny surf. There’s a real standout right around August 17th that’s worth circling on the calendar. After that, the second week looks grim again, with nothing I’d recommend paddling out for.
Right now (Monday the 10th), it’s glassy but tiny – only 2 ft of weak south swell with hardly any energy (18). Not worth wetting a wetsuit.
Tuesday morning (August 11th) is the first time we get something surfable. There’s 3 ft of swell out of the SSW, and importantly, there’s a moderate offshore wind from the NNW. It’s clean, with moderate wave energy (46), but the swell period is short at 5 seconds. It’s surfable but nothing to get excited about. That afternoon gets messy.
The rest of the first week – Wednesday 12th through Saturday 15th – stays small, 1 ft to 2 ft, with light winds but mostly cross-onshore. Thursday morning (13th) is clean with a gentle offshore, but again, the swell is tiny and weak. Friday (14th) has cleaner conditions with a light offshore, but it’s only 2 ft on a 7-second period (52 energy). It’s okay for the longboard if you’re desperate.
The best session by far is Monday morning, August 17th. We’ve got 5 ft of south swell, 8-second period, and light cross-offshore wind from the NE – that means really clean waves. The combined energy is strong (245), so there’s some push. This is the one to aim for. It’s still a beach break, so the shorter period will keep it from closing out too straight. Crowds are likely here, but for the best wave of the window, it’s worth sharing.
After that, it goes flat and poor again. Tuesday morning (18th) has a long-period 15-second groundswell out of the SE, but it’s only 1 ft (104 energy). Morning offshore winds make it clean, but it’s tiny and the long period means it’ll break straight on the sand. Wednesday the 20th and beyond is all cross-onshore wind and small swell, or onshore and messy. By the 23rd and 24th, we get 3 ft of ESE swell but with fresh, lumpy cross-onshore wind – that’s kite-surfing conditions, not paddle surfing.
So, the only true standout is Monday morning, August 17th. It’s clean, the best energy, and a decent waist-to-chest high wave. The rest of the 16-day window is mostly flat or blown out. A lot of poor surf here, but that one morning should make it all worth it.
Rusty.
Short Range ForecastSome drizzle, heaviest during Tue afternoon. Warm (max 29°C on Sun night, min 23°C on Mon morning). Winds increasing (calm on Mon morning, fresh winds from the W by Tue morning). | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Fri afternoon. Warm (max 26°C on Thu afternoon, min 16°C on Fri afternoon). Winds decreasing (fresh winds from the NNW on Fri afternoon, calm by Sat afternoon). | ||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 5 | SSW 5 | SSW 4 | SSW 5 | SSW 5 | SSW 6 | S 6 | S 5 | SSW 5 | SSW 4 | SW 4 | S 6 | S 7 | S 7 | SSW 6 | S 7 | S 7 | S 6 |
Wave Graph | |||||||||||||||||||
24 | 13 | 8 | 26 | 42 | 33 | 25 | 15 | 9 | 20 | 17 | 29 | 17 | 36 | 36 | 37 | 26 | 15 | 13 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | glassy | cross-on | cross | off | cross | off | cross-on | cross-on | off | off | cross | off | cross-off | off | off | cross-off | cross-on | cross-on |
High Tide | 5:55AM0.93m | 6:21PM1.20m | 6:51AM0.99m | 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 | |||||||
Low Tide | 11:29PM0.11m | 11:22AM0.07m | 00:34AM0.06m | 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 | ||||||
— | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | |
7:55 | — | 7:54 | — | — | 7:53 | — | — | 7:52 | — | — | 7:51 | — | — | 7:50 | — | — | 7:47 | — | |
mm | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | 6 | — | — | — | — |
Temp °C | 29 | 25 | 27 | 27 | 25 | 26 | 27 | 24 | 25 | 24 | 23 | 26 | 24 | 22 | 17 | 20 | 19 | 21 | 23 |
Feels °C | 28 | 25 | 26 | 27 | 23 | 25 | 28 | 23 | 26 | 25 | 22 | 25 | 21 | 21 | 12 | 19 | 17 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | S 6 | S 5 | SSE 6 | SE 10 | SSW 5 | ESE 9 | SSW 6 | S 6 | S 5 | ESE 8 | SSW 6 | SE 10 | S 6 | S 7 | S 7 | SSW 6 | S 7 | S 7 | S 6 |
24 | 13 | 4 | 4 | 42 | 8 | 25 | 15 | 9 | 7 | 7 | 4 | 17 | 36 | 36 | 37 | 26 | 15 | 13 | |
Swell 2 Height (m) Direction Period (s) | SE 7 | SE 10 | SE 10 | E 8 | SE 9 | — | SE 9 | SE 8 | ESE 8 | SE 14 | SE 8 | SE 8 | ESE 9 | ESE 10 | ESE 10 | WSW 5 | SE 9 | ENE 4 | SE 9 |
2 | 4 | 4 | 1 | 3 | — | 3 | 3 | 7 | 8 | 3 | 3 | 8 | 9 | 9 | 5 | 3 | 2 | 3 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | E 8 | E 8 | E 8 | E 8 | E 8 | E 12 | SE 11 | SE 11 | SE 11 | SE 11 | SE 13 | W 5 | SE 13 | SE 13 | S 8 | SE 12 | SE 9 | — |
4 | 1 | 1 | 1 | 1 | 1 | 3 | 5 | 5 | 5 | 4 | 7 | 2 | 7 | 7 | 10 | 6 | 3 | — | |
Wind waves Height (m) Direction Period (s) | — | — | SSW 5 | SSW 4 | W 5 | SSW 5 | — | — | — | SSW 5 | SSW 4 | SW 4 | NW 3 | — | SSW 2 | WSW 5 | NE 4 | — | SW 3 |
— | — | 8 | 26 | 20 | 33 | — | — | — | 20 | 17 | 29 | 3 | — | 1 | 14 | 3 | — | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 36 | 853 | 727 | 36 | 0 | 142 | 774 | 854 | 1640 | 0 | 36 | 17 | 718 | 0 | 0 | 0 | 718 | 729 | 853 |
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.











