Surf Forecasts:
Road K surf forecast from 15 Aug 2026:
- Best quality surf: Monday 17 Aug, 5PM (local time) - 3ft (0.9m), 6s period, SSW swell with offshore winds.
- Most powerful swell: Monday 17 Aug, 11AM (local time) - 5.5ft (1.7m), 6s period, S swell with 205 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 5PM (local time) - 3ft (0.9m), 6s 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 Monday (Aug 17) at 5PM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.9m and 6s. 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 1.7m 6s and forecast to arrive on Monday (Aug 17) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Aug 15) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Mon 17th Aug) | 3ft (0.9m) 6s |
| Best Surf | 5PM (Mon 17th Aug) | 3ft (0.9m) 6s |
| Most Powerful | 11AM (Mon 17th Aug) | 5.5ft (1.7m) 6s |
Table - best surf conditions forecast for Road K over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s on offer for Road-K and the surrounding area over this next stretch.
Honestly, the start of this period is a tough one. For the first week, the surf is tiny and the conditions are messy, with not much to get excited about at all. There’s a long gap of poor, small waves with onshore winds messing things up. You’re looking at flat or near-flat days from the 15th right through to the 24th of August. A few moments on the 17th and 18th show a bump in size, but it’s still messy and not worth a paddle. It’s a real lull.
The real standout arrives on the 28th of August. Friday morning at Road-K is where it’s at. We’ve got a clean 5 ft swell pushing in from the ENE with moderate offshore winds from the north, making for clean lines. The combined energy is solid at (241). The period is short at 6 seconds, so these are wind swell waves, not groundswell, but with that offshore flow, they should be fun and reeling for a sandbar. This is the best session of the whole run by a long way. Keep in mind, 5 ft is pushing into the zone where beginners might find it a bit much, especially with that short period.
Later on the 27th, Thursday afternoon, there’s a taste of things to come: 4 ft from the south with a cross-off wind, and decent energy (222), but it’s only a marginal call. The real gold is Friday morning.
Water temp at the start of the outlook on the 15th is sitting at 76°, which is a full 4° above the long-term average – so much warmer than usual for this time of year.
The rest of the second week, around the 29th and 30th, fades back into small, onshore slop. Don’t plan around those.
So, to boil it down: sit tight through the flat spell, mark your calendar for Friday the 28th of August, early birds get the cleanest waves at Road-K. That’s your window.
- Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Mon morning. Warm (max 25°C on Mon afternoon, min 20°C on Sat morning). Winds increasing (calm on Sat afternoon, fresh winds from the S by Mon morning). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Thu morning. Warm (max 26°C on Thu afternoon, min 21°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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) | SE 9 | S 6 | S 6 | ESE 9 | S 6 | SSW 4 | S 6 | SE 6 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SE 6 | SE 9 | SE 9 | ESE 7 | SE 8 | SE 9 | SE 9 | SE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 13 | 3 | 3 | 7 | 17 | 34 | 205 | 66 | 121 | 93 | 62 | 77 | 52 | 25 | 12 | 12 | 15 | 18 | 12 | 12 | 18 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross-on | cross-on | cross-on | cross-on | off | off | cross-off | cross-on | cross-on | cross-on | cross-on | cross | cross-off | off | cross-off | cross-off | on | on |
High Tide | 10:07AM1.12m | 10:26PM1.12m | 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 | |||||||
Low Tide | 3:47PM0.03m | 4:08AM0.02m | 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 | ||||||||
 | |  | |  |  |  |  | | | | | | |  | | | | | | | |
 | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — |
 | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | — | 7:43 | — | — | 7:40 | — | — | 7:39 | — |
mm | — | — | — | — | — | — | 3 | 1 | — | — | — | — | — | — | 5 | 7 | — | — | — | — | — |
Temp °C | 21 | 23 | 23 | 22 | 24 | 24 | 23 | 25 | 25 | 22 | 25 | 24 | 25 | 25 | 25 | 22 | 26 | 26 | 21 | 23 | 23 |
Feels °C | 20 | 23 | 21 | 22 | 22 | 22 | 22 | 27 | 26 | 23 | 26 | 25 | 25 | 23 | 24 | 23 | 27 | 26 | 20 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | S 5 | ENE 4 | SE 9 | S 6 | SE 8 | SE 8 | — | SE 6 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SE 6 | SSW 4 | ESE 6 | ESE 7 | ESE 7 | SE 6 | ESE 6 | ESE 5 |
| kJ | 2 | 2 | 3 | 7 | 11 | 11 | — | 62 | 121 | 93 | 62 | 77 | 52 | 25 | 11 | 8 | 15 | 15 | 9 | 12 | 8 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | S 6 | ESE 9 | SE 6 | — | — | SSW 6 | — | SE 13 | SE 8 | SSE 11 | SE 10 | SE 9 | SE 9 | SSW 5 | SE 9 | SE 8 | SE 9 | SE 9 | S 6 |
| kJ | 13 | 3 | 3 | 7 | 1 | — | — | 66 | — | 7 | 23 | 12 | 15 | 14 | 12 | 4 | 12 | 18 | 12 | 12 | 7 |
Swell 3 Height (m) Direction Period (s) | SE 12 | S 6 | S 5 | SE 6 | — | — | — | S 9 | S 14 | SE 13 | SE 12 | S 6 | SE 10 | — | ESE 6 | SE 9 | SSE 5 | SSE 6 | E 7 | E 7 | SE 8 |
| kJ | 6 | 2 | 1 | 2 | — | — | — | 2 | 4 | 7 | 6 | 3 | 15 | — | 8 | 12 | 3 | 3 | 9 | 4 | 18 |
Wind waves Height (m) Direction Period (s) | ENE 4 | — | — | — | S 6 | SSW 4 | S 6 | — | — | NNE 3 | — | — | — | SSW 6 | — | — | — | — | E 3 | E 4 | — |
| kJ | 5 | — | — | — | 17 | 34 | 205 | — | — | 2 | — | — | — | 11 | — | — | — | — | 1 | 9 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1630 | 2554 | 1407 | 1467 | 2554 | 1337 | 56 | 0 | 0 | 0 | 59 | 59 | 134 | 260 | 173 | 36 | 636 | 313 | 789 | 852 | 244 |
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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