Surf Forecasts:
Road K surf forecast from 18 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: Tuesday 18 Aug, 2PM (local time) - 3ft (0.9m), 7s period, SSE swell with 76 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 0.9m 7s and forecast to arrive on Tuesday (Aug 18) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 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 | 2PM (Tue 18th Aug) | 3ft (0.9m) 7s |
Table - best surf conditions forecast for Road K over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. Let’s get into it. This stretch of the forecast is a real mixed bag, and I’ll be honest, it’s pretty quiet for the most part. We’re looking at a long, drawn-out period of small, weak swell with a few moments of clean conditions that could get you wet, but you’ll be working for it. The real standout, the one to circle on the calendar, doesn’t come until the tail end of the run.
Water temps at the main spot are running at 75°, which is a touch warmer than normal for this time of year, so the rubber might be a bit thin.
We start off on Tuesday morning, August 18th, at Road K. It’s tiny, with a 3 ft SSE swell and a period of just 7 seconds. The energy is weak (75). The good news is that the wind is glassy out of the NNE, so the surface will be clean. It’s surfable, but very ordinary. That afternoon, the wind swings and the conditions get poor.
Wednesday the 19th looks similar – small, weak swell, but the morning offers a clean cross-off wind from the WNW with 2 ft of swell. It’s still tiny, though. The rest of the week through to Monday the 25th is a real slog. Swell drops to 1 ft and the energy is pathetic. There are a few glassy or clean windows, like Friday the 21st morning and the afternoon, and Monday the 25th morning, but the waves are just barely there. It’s a long gap of nothing exciting.
We get a bit of a pulse of energy on the 26th and 27th of August, with the combined energy climbing into the triple digits (162 and 205), but the swell direction is mixed up, the period is short and all over the place, and the winds are onshore or cross-shore. It’s choppy and messy, not worth paddling out.
Now, here’s the light at the end of the tunnel. Mark your calendars for Friday, August 28th. That morning, we see a 4 ft S swell with a 7-second period, and the wind is off from the north. The energy is solid at 227. The call is “expect good surf conditions.” The afternoon is even better – the swell picks up to 5 ft from the south, still short period at 8 seconds, but the wind goes glassy from the SSE. The energy jumps to 350. That’s your window. It’s a clean, moderate offshore in the morning turning glassy in the arvo. It’s not huge, but it’s the best we’ve got by a long shot.
After that, the weekend of the 29th and 30th holds some clean offshore winds, but the swell fades back to knee-high. There’s a small bump of energy from the east on September 1st, but it’s messy. The long-range stuff on September 2nd sees a rise in period to 12 seconds and moderate energy, but the wind is a fresh cross-shore, making it lumpy.
So, the call is simple: if you’re desperate for a paddle, the glassy mornings on the 18th, 19th, or 21st will get you wet, but don’t expect much. The real winner is Friday, August 28th. Get on it.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Tue night. Warm (max 26°C on Wed afternoon, min 21°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Sat afternoon. Warm (max 24°C on Fri afternoon, min 19°C on Sat night). Winds increasing (calm on Fri afternoon, fresh winds from the W by Sun night). | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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) | SSE 7 | SSE 7 | S 7 | SSE 6 | SSE 6 | SE 9 | ESE 7 | SE 7 | SE 7 | SE 9 | SE 8 | E 5 | E 5 | E 5 | E 5 | E 4 | SSE 6 | SSE 6 | S 6 | S 6 | S 6 |
Wave Graph | |||||||||||||||||||||
65 | 76 | 31 | 35 | 24 | 38 | 21 | 12 | 12 | 19 | 18 | 23 | 44 | 53 | 31 | 18 | 14 | 33 | 67 | 51 | 40 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-on | cross-off | cross-on | cross-on | off | glassy | off | cross-off | glassy | cross | cross | cross | cross-off | cross-on | on | cross | cross-off | cross | cross-off |
High Tide | 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 | 5:04PM0.97m | 5:32AM0.80m | 5:52PM1.01m | ||||||||
Low Tide | 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 | 9:39AM0.28m | 11:16PM0.29m | 10:39AM0.26m | 00:01AM0.24m | ||||||||
6:01 | — | — | 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 | 2 | — | — | — | — | — | — | — | — | — | 4 | — | 1 | 3 | 4 | — | — | — |
Temp °C | 22 | 24 | 25 | 25 | 26 | 26 | 24 | 23 | 23 | 22 | 24 | 24 | 21 | 20 | 20 | 20 | 23 | 23 | 22 | 25 | 25 |
Feels °C | 25 | 26 | 26 | 27 | 25 | 26 | 23 | 25 | 25 | 20 | 24 | 23 | 19 | 18 | 18 | 21 | 24 | 25 | 20 | 21 | 22 |
Swell 1 Height (m) Direction Period (s) | SSE 7 | SSE 7 | S 7 | SSE 6 | SSE 6 | SE 9 | ESE 7 | SE 7 | SE 7 | SE 9 | SE 8 | SE 8 | SE 13 | ESE 8 | ESE 8 | ESE 7 | E 4 | SSE 6 | S 6 | S 6 | S 6 |
65 | 76 | 31 | 35 | 24 | 38 | 21 | 12 | 12 | 19 | 18 | 17 | 7 | 6 | 6 | 5 | 9 | 33 | 67 | 51 | 40 | |
Swell 2 Height (m) Direction Period (s) | E 4 | E 4 | SE 8 | SE 10 | SE 9 | SSE 6 | SW 4 | SE 9 | SSW 4 | S 5 | S 5 | S 5 | — | SE 13 | SE 9 | ESE 12 | SSE 6 | SE 12 | SE 12 | SE 11 | SE 11 |
3 | 1 | 29 | 16 | 14 | 4 | 2 | 12 | 4 | 4 | 4 | 4 | — | 7 | 3 | 15 | 11 | 22 | 21 | 33 | 18 | |
Swell 3 Height (m) Direction Period (s) | SE 13 | SE 12 | SE 11 | SE 10 | SSW 6 | ESE 5 | SSE 5 | SSE 5 | SE 9 | E 7 | SE 14 | SE 14 | SE 10 | SE 9 | ESE 13 | SE 8 | ESE 12 | ESE 7 | E 6 | SE 7 | ESE 7 |
7 | 6 | 18 | 15 | 6 | 3 | 5 | 3 | 12 | 1 | 8 | 8 | 4 | 3 | 16 | 3 | 14 | 5 | 3 | 2 | 5 | |
Wind waves Height (m) Direction Period (s) | NE 4 | — | SSW 2 | — | — | SSW 5 | SW 3 | SSW 4 | — | NE 3 | E 4 | E 5 | E 5 | E 5 | E 5 | E 4 | — | — | — | — | — |
4 | — | 1 | — | — | 6 | 3 | 2 | — | 5 | 10 | 23 | 44 | 53 | 31 | 18 | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 59 | 59 | 0 | 263 | 136 | 104 | 263 | 244 | 718 | 0 | 271 | 347 | 594 | 0 | 173 | 214 | 104 | 3 | 134 | 4 |
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.











