Surf Forecasts:
Road K surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 5AM (local time) - 1.5ft (0.5m), 9s period, SE swell with cross-offshore winds.
- Most powerful swell: Saturday 22 Aug, 5AM (local time) - 4.5ft (1.4m), 6s period, SSE swell with 126 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 5AM (local time) - 1.5ft (0.5m), 9s period with SE 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 Thursday (Aug 20) at 5AM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.3m and 3s. Another secondary swell of 0.4m and 3s is also forecast. 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 1.4m 6s and forecast to arrive on Saturday (Aug 22) at 5AM. 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 Monday (Aug 24) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 20th Aug) | 1.5ft (0.5m) 9s |
| Best Surf | 5AM (Thu 20th Aug) | 1.5ft (0.5m) 9s |
| Most Powerful | 5AM (Sat 22nd Aug) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Road K over the next 16 days.
The Lowdown
Alright, let’s get into it. This is a tough one for our little stretch of coast. The next 16 days don’t look like they’ll give us much to write home about. There are no real standout sessions, and most of the time the surf is either too small, messy, or just plain ordinary. We’ll take what we can get, but it’s a lean run ahead.
Water temperature is sitting at 75° with a positive anomaly of 3° – that’s a touch warmer than normal for this time of year, so at least the water’s inviting.
The first hint of something rideable, and really the only flicker of hope, is Wednesday morning the 19th at Road K. It’s a sandbar break, very consistent, and it’s exposed to SSE swell. You’ve got a tiny 2 ft SSE swell rolling in with a 6-second period – so short, weak energy (combined energy of 66). The wind is light from the NW at 3 mph, blowing cross-offshore, which keeps it clean. The score says it’s surfable but very ordinary. It’s the best we’ve got, but it’s not pretty. Crowds are often here, so expect company. For a proper surfer, it’s a limp option.
From there, it’s a long, dry stretch. Thursday the 20th through Tuesday the 27th of August is mostly poor surf conditions with tiny waves, and even when there’s a bit of size, the wind is awful. Thursday morning the 20th is clean but tiny – 2 ft, 7-second SSE swell. Friday the 21st is worse. Saturday the 22nd gets a bit of onshore junk. Sunday the 23rd morning is glassy, but the swell is a pathetic 1 ft, so it’s a flat spell. Monday the 24th morning has a clean 3 ft S swell, but it’s weak and short period.
Wednesday the 26th afternoon sees a jump in swell to 4 ft SSE, but with a 5-second period and a cross-onshore wind, it’s choppy and messy. That’s not for surfing – more interesting for kite surfing if you’re into that.
Thursday the 27th brings a stronger swell – 4 ft S with a 7-second period and combined energy hitting 161 (moderate) – but the wind is howling from the SSW at 25 mph, heavy cross-onshore. It’s stormy, with risk of thunderstorms. Not worth paddling out.
Friday the 28th is the biggest we’ll see, with a 5 ft S swell, 8-second period, and combined energy of 264 (moderate). But again, cross-shore wind at 16 mph keeps it lumpy. It’s expert only at that size if the conditions were good, but they’re not.
Then we bottom out again. Saturday the 29th and Sunday the 30th have a bit of clean, offshore wind, but the swell is tiny – 2 ft to 2 ft. By Monday the 31st of August and into Tuesday the 1st of September, the swell picks up to 3 ft with moderate energy, but it’s all cross-onshore and choppy.
Wednesday the 2nd of September morning offers a glimmer – a 3 ft SE swell with an 11-second period, a long-period groundswell, and offshore wind from the N at 12 mph. The combined energy is 148 (moderate). That’s the best-looking window in the second week, but it’s still small and the wind is moderate. It’s surfable and clean, but it’s not a stand-out. For a point or reef, that period would be a bonus, but Road K is a sandbar, so watch for it running a bit straight.
After that, it fades again through Thursday the 3rd of September.
Honestly, if you’ve got a kiteboard, the stormy days around the 27th and 28th might be your thing. For a surfboard, there’s nothing to get excited about. The best of a bad bunch is Wednesday morning the 19th – tiny, clean, but surfable. Otherwise, keep your wetsuit on ice and wait for a better forecast.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Fri night. Warm (max 25°C on Wed afternoon, min 21°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 35mm), heaviest during Sat morning. Warm (max 24°C on Mon afternoon, min 18°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 6 | SSE 6 | SE 9 | SE 7 | SE 7 | SE 8 | SE 9 | ESE 8 | SSE 6 | S 6 | S 6 | SE 5 | ESE 6 | SE 12 | SSE 6 | SE 12 | SE 11 | SE 11 | SE 11 | SE 10 | SE 11 |
Wave Graph | |||||||||||||||||||||
35 | 24 | 39 | 21 | 12 | 18 | 19 | 27 | 90 | 66 | 30 | 14 | 15 | 23 | 22 | 37 | 33 | 30 | 29 | 28 | 29 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | off | cross-off | glassy | cross | cross-on | cross-on | cross-off | cross-off | off | cross-on | on | cross-off | off | cross-on | cross-off | cross-off | cross-on | on |
High Tide | 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 | 6:18AM0.86m | 6:36PM1.05m | ||||||||
Low Tide | 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 | 11:35AM0.21m | 00:35AM0.18m | ||||||||
6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | |
— | 7:43 | — | — | 7:40 | — | — | 7:39 | — | — | 7:37 | — | — | 7:37 | — | — | 7:35 | — | — | 7:34 | — | |
mm | — | — | — | — | — | — | — | — | 12 | 23 | 10 | — | — | — | 2 | — | — | — | — | — | — |
Temp °C | 24 | 25 | 25 | 24 | 24 | 23 | 22 | 23 | 23 | 22 | 20 | 20 | 20 | 22 | 23 | 22 | 24 | 24 | 19 | 21 | 22 |
Feels °C | 26 | 25 | 25 | 25 | 24 | 25 | 20 | 21 | 23 | 23 | 20 | 19 | 21 | 24 | 24 | 20 | 23 | 23 | 18 | 19 | 21 |
Swell 1 Height (m) Direction Period (s) | SSE 6 | SSE 6 | SE 9 | SE 7 | SE 7 | SE 8 | SE 9 | ESE 8 | ESE 8 | ESE 6 | ESE 6 | SE 5 | ESE 6 | SE 5 | SSE 6 | S 6 | S 6 | S 6 | SSW 6 | SSW 6 | SE 11 |
35 | 24 | 39 | 21 | 11 | 18 | 19 | 27 | 13 | 19 | 25 | 14 | 12 | 7 | 22 | 37 | 28 | 20 | 13 | 13 | 29 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 9 | SSE 6 | SE 9 | SE 9 | ESE 5 | S 5 | SSW 5 | SE 14 | ESE 8 | ESE 8 | SSW 5 | S 5 | S 5 | SW 6 | SE 12 | SE 11 | SE 11 | SE 11 | SE 10 | SSW 6 |
16 | 14 | 7 | 12 | 12 | 3 | 1 | 3 | 8 | 12 | 12 | 8 | 4 | 4 | 8 | 35 | 33 | 30 | 29 | 28 | 7 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | — | — | SSW 4 | SSW 4 | S 5 | SE 15 | S 5 | — | SE 13 | SE 13 | ESE 8 | ESE 12 | SE 12 | E 7 | E 7 | E 6 | SE 6 | SSE 5 | ESE 6 | ESE 6 |
15 | — | — | 1 | 2 | 1 | 8 | 2 | — | 7 | 7 | 11 | 15 | 23 | 8 | 3 | 3 | 5 | 3 | 3 | 3 | |
Wind waves Height (m) Direction Period (s) | — | SSW 2 | SSW 5 | — | — | — | E 7 | E 4 | SSE 6 | S 6 | S 6 | — | — | — | — | N 3 | — | — | NE 3 | — | — |
— | 1 | 6 | — | — | — | 8 | 9 | 90 | 66 | 30 | — | — | — | — | 1 | — | — | 2 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 263 | 67 | 17 | 263 | 244 | 368 | 2531 | 72 | 81 | 81 | 36 | 221 | 348 | 17 | 0 | 36 | 191 | 0 | 594 | 405 |
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.











