Surf Forecasts:
Road K surf forecast from 16 Aug 2026:
- Best quality surf: Monday 17 Aug, 2PM (local time) - 4ft (1.2m), 6s period, S swell with cross-offshore winds.
- Most powerful swell: Tuesday 18 Aug, 8AM (local time) - 3.5ft (1.0m), 7s period, SSE swell with 105 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 2PM (local time) - 4ft (1.2m), 6s period with S 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 Monday (Aug 17) at 2PM. The primary swell is predicted to be 1.2m and 6s period. 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 1.0m 7s and forecast to arrive on Tuesday (Aug 18) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Thursday (Aug 20) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Mon 17th Aug) | 4ft (1.2m) 6s |
| Best Surf | 2PM (Mon 17th Aug) | 4ft (1.2m) 6s |
| Most Powerful | 8AM (Tue 18th Aug) | 3.5ft (1.0m) 7s |
Table - best surf conditions forecast for Road K over the next 16 days.
The Lowdown
Right, let’s have a look at what’s on offer for Road K (sandbar). I’ll be honest with you, the next sixteen days aren’t looking like much of a celebration. The water’s sitting at a warm 76°, which is much warmer than normal for this time of year, but the surf just isn’t cooperating.
We’ve got a long stretch of weak energy and tricky conditions to get through. From Sunday the 16th right through the rest of the week, it’s pretty much all flat and messy. The first couple of days are a write-off – a tiny 1.0ft to 2ft swell with short periods of 6 seconds, mixed with onshore winds and just poor surf. The combined energy is barely showing a pulse, reading 16, which is as weak as it gets.
Monday the 17th afternoon brings the first hint of something, with a north wind going offshore and a 4ft south swell at 6 seconds. The wave energy picks up to 87, which is still on the low side, but the clean conditions are a positive. The waves are very ordinary though, nothing to get excited about.
The next few days are a mix of tiny swells and cross-shore winds, with the wave energy rarely cracking 100. There’s a long gap of poor to very ordinary surf until we finally get a little spike on Monday the 24th. That morning sees a 1ft groundswell from the southeast with a period of 12 seconds and northwest offshore winds, giving clean conditions. The energy is still low at 59, but the long period does lend itself to a bit more shape at a sandbar like this, if the swell ever really shows.
Now, the best chance in this entire outlook is the afternoon of Wednesday the 26th. We get a 2ft swell from the southeast, but the period jumps to a very long 14 seconds and the combined energy hits 208 (moderate energy). What makes this a real standout is the glassy wind from the WSW. It’s going to be clean, with good shape potential from that long groundswell. The waves won't be huge, but with those conditions, it’s your best bet. Be aware that the wind swings from the west-southwest to a strong west-northwest on the 27th, so that window is tight.
The last few days of August and into the 31st are a return to small, choppy and messy surf. The 3ft south-east swell on the morning of Sunday the 30th has some clean early wind and an energy reading of 132, but the afternoon turns onshore. Nothing else is really worth chasing.
So, there you have it, a long quiet period, one decent, glassy afternoon on the 26th, and then back to the wait. Road K is a very consistent sandbar, but it just can’t find the wind or the swell right now. It won’t stay this poor forever.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Mon morning. Warm (max 25°C on Mon afternoon, min 20°C on Sun night). Winds decreasing (fresh winds from the SSW on Sun night, calm by Tue afternoon). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Thu morning. Warm (max 26°C on Wed afternoon, min 18°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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) | ESE 9 | S 6 | SSW 5 | S 6 | S 6 | SSE 8 | SSE 7 | SE 8 | SE 7 | SE 7 | SE 7 | SE 9 | ESE 9 | ESE 9 | SE 9 | SE 8 | SE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 7 |
Wave Graph | |||||||||||||||||||||
7 | 17 | 49 | 89 | 83 | 72 | 86 | 40 | 54 | 33 | 29 | 39 | 30 | 30 | 26 | 18 | 19 | 26 | 34 | 22 | 30 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | off | cross-off | cross-off | cross-on | cross-on | cross | cross-on | cross-off | off | cross-off | off | cross-off | on | cross-on | cross-on | cross | cross-off |
High Tide | 10:53AM1.11m | 11:12PM1.04m | 11:39AM1.07m | 11:58PM0.96m | 12:27PM1.02m | 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 | |||||||
Low Tide | 4:30PM0.08m | 4:45AM0.06m | 5:14PM0.15m | 5:24AM0.12m | 6:01PM0.21m | 6:06AM0.17m | 6:52PM0.27m | 6:53AM0.22m | 7:48PM0.31m | 7:44AM0.26m | 8:52PM0.33m | 8:39AM0.28m | 10:06PM0.32m | ||||||||
6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | |
— | 7:46 | — | — | 7:45 | — | — | 7:44 | — | — | 7:43 | — | — | 7:40 | — | — | 7:39 | — | — | 7:37 | — | |
mm | — | — | 3 | 10 | — | — | — | — | — | — | — | — | 2 | 1 | — | — | — | — | — | 3 | — |
Temp °C | 22 | 24 | 24 | 23 | 25 | 23 | 23 | 25 | 24 | 25 | 26 | 25 | 21 | 22 | 23 | 19 | 21 | 21 | 22 | 19 | 19 |
Feels °C | 22 | 21 | 21 | 24 | 28 | 25 | 26 | 26 | 25 | 25 | 25 | 24 | 22 | 24 | 24 | 17 | 20 | 20 | 21 | 16 | 17 |
Swell 1 Height (m) Direction Period (s) | S 6 | SE 8 | SE 8 | SE 8 | S 6 | SSE 8 | SSE 7 | S 7 | SE 7 | SE 7 | SE 7 | SE 9 | S 5 | ESE 9 | SE 9 | SE 8 | SSE 5 | ESE 8 | ESE 8 | ESE 8 | ESE 7 |
7 | 11 | 11 | 11 | 83 | 72 | 86 | 33 | 54 | 33 | 29 | 39 | 12 | 30 | 26 | 18 | 9 | 26 | 34 | 22 | 30 | |
Swell 2 Height (m) Direction Period (s) | ESE 9 | SE 6 | — | S 9 | S 9 | SSW 6 | SE 13 | SE 8 | SSW 6 | SSW 6 | SSW 6 | SSE 6 | ESE 9 | SSW 5 | SSW 5 | S 5 | SE 9 | SSE 5 | S 6 | E 3 | S 7 |
7 | 1 | — | 2 | 2 | 32 | 7 | 40 | 12 | 12 | 7 | 3 | 30 | 8 | 2 | 4 | 19 | 3 | 6 | 2 | 14 | |
Swell 3 Height (m) Direction Period (s) | SE 6 | — | — | — | S 9 | — | SE 13 | SE 12 | SSE 11 | SE 10 | SE 9 | SSW 6 | WSW 4 | — | E 7 | SSE 6 | E 7 | S 6 | SE 13 | S 6 | SE 9 |
2 | — | — | — | 2 | — | 7 | 6 | 12 | 15 | 14 | 3 | 8 | — | 1 | 3 | 4 | 6 | 7 | 3 | 3 | |
Wind waves Height (m) Direction Period (s) | — | S 6 | SSW 5 | S 6 | — | — | — | — | — | — | SSW 2 | SSW 4 | — | — | — | NE 3 | — | — | ENE 3 | — | — |
— | 17 | 49 | 89 | — | — | — | — | — | — | 1 | 8 | — | — | — | 1 | — | — | 1 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1467 | 1175 | 2341 | 17 | 0 | 0 | 0 | 59 | 61 | 93 | 626 | 0 | 0 | 1640 | 671 | 727 | 851 | 263 | 263 | 104 | 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.











