Surf Forecasts:
Road K surf forecast from 19 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 11AM (local time) - 2.5ft (0.7m), 6s period, SSE swell with cross-offshore winds.
- Most powerful swell: Saturday 22 Aug, 11PM (local time) - 5ft (1.5m), 6s period, E swell with 151 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 11AM (local time) - 2.5ft (0.7m), 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 Wednesday (Aug 19) at 11AM. The primary swell is predicted to be 0.7m and 6s period with a secondary swell of 0.3m 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 1.5m 6s and forecast to arrive on Saturday (Aug 22) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Friday (Aug 21) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Wed 19th Aug) | 2.5ft (0.7m) 6s |
| Best Surf | 11AM (Wed 19th Aug) | 2.5ft (0.7m) 6s |
| Most Powerful | 11PM (Sat 22nd Aug) | 5ft (1.5m) 6s |
Table - best surf conditions forecast for Road K over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break it down in old-school numbers.
The next 16 days kick off slow at Road K. The first half-decent chance comes on Wednesday morning, August 19th, but it’s weak. Swell is 2.3ft out of the SSE with a short, weak period of 6 seconds, and the energy is only 66. Wind is a light cross-offshore from the west, so the surface will be clean. You can get wet on a longboard, but it’s nothing special.
The pattern stays flat through the rest of the week. Thursday morning, August 20th drops even smaller to 1.6ft from the SSE, but we get a clean offshore wind from the north. Still, there’s just no power. Friday and Saturday are more of the same – tiny, short-period junk with cross-shore winds.
Sunday morning, August 23rd shows a slight bump to 3ft from the SSE, still short period at 6 seconds, but energy climbs to 81. With a light cross-offshore from the NNE, it’ll be clean. You’ll be scratching for waves, but the conditions are pleasant.
The best of the first week is Monday morning, August 24th. Swell is 2.6ft from the SSE with a 7-second period, and energy hits 107 – moderate power now. The wind is a clean offshore from the northwest. This is the most organised and cleanest session of the early run.
The real standout arrives on Friday morning, August 28th. A solid 4.3ft southerly swell rolls in with a 9-second period and a strong energy reading of 415. The wind is a fresh cross-offshore from the northeast, keeping it clean. This is the biggest, punchiest swell of the whole outlook. It’s getting into the zone where beginners might be in over their head, but for everyone else, this is the morning to lock in. The sets will have some real weight.
Saturday morning, August 29th sees a drop-off to 2ft from the SE.
Then at the tail end of the forecast, on Tuesday morning, September 1st, the swell drops to just 1ft from the SE, but the period stretches out to 15 seconds – that’s true groundswell. Energy is only 60, so it’s weak, but the wind goes glassy. That morning will be clean as a mirror. A tiny, long-period swell like that will break with shape but be very inconsistent, and it’s best suited to a point or reef rather than a straight sandbar like Road K.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Warm (max 26°C on Wed afternoon, min 20°C on Thu afternoon). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Sat afternoon. Warm (max 26°C on Mon afternoon, min 18°C on Sat afternoon). Winds decreasing (fresh winds from the E on Sat afternoon, calm by Sun afternoon). | ||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 8 | SSE 6 | SSE 6 | SE 9 | SE 7 | SE 7 | SE 7 | SE 9 | ESE 8 | SE 8 | E 4 | E 5 | E 6 | SSE 6 | S 5 | SSW 5 | SSE 7 | SSW 7 | SE 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 29 | 35 | 24 | 39 | 25 | 13 | 12 | 19 | 27 | 17 | 18 | 29 | 151 | 52 | 29 | 55 | 56 | 131 | 43 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-on | cross-on | off | off | off | cross | cross-on | cross-on | cross-on | cross | cross | cross-off | on | cross | off | cross | cross-off |
High Tide | 00:46AM0.87m | 1:17PM0.98m | 1:39AM0.80m | 2:13PM0.94m | 2:38AM0.76m | 3:12PM0.92m | 3:41AM0.74m | 4:11PM0.94m | 4:40AM0.76m | 5:04PM0.97m | 5:32AM0.80m | 5:52PM1.01m | |||||||
Low Tide | 6:06AM0.17m | 6:52PM0.27m | 6:53AM0.22m | 7:48PM0.31m | 7:44AM0.26m | 8:52PM0.33m | 8:39AM0.28m | 10:06PM0.32m | 9:39AM0.28m | 11:16PM0.29m | 10:39AM0.26m | 00:01AM0.24m | |||||||
 |  |  |  |  |  | | | |  | |  |  | | |  | | | | |
 | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 7:44 | — | 7:43 | — | — | 7:40 | — | — | 7:39 | — | — | 7:37 | — | — | 7:37 | — | — | 7:35 | — |
mm | 1 | 1 | — | — | — | — | — | — | — | — | — | 3 | 1 | — | — | 1 | — | — | — |
Temp °C | 25 | 24 | 26 | 25 | 25 | 20 | 22 | 21 | 23 | 22 | 21 | 19 | 20 | 19 | 22 | 25 | 22 | 26 | 26 |
Feels °C | 26 | 25 | 27 | 24 | 25 | 19 | 22 | 18 | 21 | 20 | 18 | 16 | 17 | 18 | 23 | 25 | 20 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | S 7 | SSE 6 | SSE 6 | SE 9 | SE 7 | SE 7 | SE 7 | SE 9 | ESE 8 | SE 8 | ESE 8 | ESE 8 | E 6 | SSE 6 | S 5 | S 5 | SSE 7 | SE 11 | SSW 6 |
| kJ | 22 | 35 | 24 | 39 | 25 | 13 | 12 | 19 | 27 | 17 | 12 | 11 | 151 | 52 | 29 | 36 | 56 | 20 | 43 |
Swell 2 Height (m) Direction Period (s) | SE 8 | SE 10 | SE 9 | SSE 6 | SE 9 | SE 9 | SE 9 | SE 7 | SSW 5 | S 5 | SE 13 | SE 13 | ESE 13 | E 5 | ESE 7 | ESE 7 | SE 12 | SE 6 | SE 11 |
| kJ | 29 | 16 | 14 | 7 | 12 | 12 | 12 | 7 | 3 | 5 | 7 | 7 | 16 | 14 | 10 | 9 | 21 | 11 | 30 |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 10 | — | S 5 | SSW 3 | S 5 | — | E 7 | SE 14 | SE 14 | S 5 | SE 9 | SE 9 | ESE 12 | E 5 | SE 12 | — | — | SE 6 |
| kJ | 18 | 15 | — | 2 | 1 | 2 | — | 4 | 8 | 8 | 1 | 3 | 3 | 15 | 4 | 22 | — | — | 7 |
Wind waves Height (m) Direction Period (s) | SSW 2 | — | SSW 6 | SSW 3 | — | — | — | NE 3 | E 3 | E 5 | E 4 | E 5 | SSE 6 | — | — | SSW 5 | SW 6 | SSW 7 | WSW 4 |
| kJ | 1 | — | 6 | 2 | — | — | — | 1 | 1 | 12 | 18 | 29 | 50 | — | — | 55 | 30 | 131 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 59 | 0 | 260 | 136 | 78 | 263 | 263 | 271 | 1092 | 263 | 839 | 336 | 348 | 0 | 61 | 3 | 0 | 3 | 0 |
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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