Road K Surf Break

Lat Long: 40.83° N 72.51° W

Road K Surf Forecast and Surf Report

Issued: 7 pm 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Road K sea temperature is
24.2° C
2.0° 

Road K surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Road K surf forecast from 18 Aug 2026:

  • Best quality surf: Monday 24 Aug, 11PM (local time) - 5ft (1.6m), 6s period, S swell with offshore winds.
  • Most powerful swell: Tuesday 25 Aug, 2AM (local time) - 5.5ft (1.7m), 7s period, SSW swell with 247 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 5AM (local time) - 2.5ft (0.8m), 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 Tuesday (Aug 18) at 5AM. The primary swell is predicted to be 0.8m and 6s period with a secondary swell of 0.3m and 4s. 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 1.7m 7s and forecast to arrive on Tuesday (Aug 25) at 2AM. 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 Tuesday (Aug 18) at 8AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Tue 18th Aug)2.5ft (0.8m) 6s
Best Surf11PM (Mon 24th Aug)5ft (1.6m) 6s
Most Powerful 2AM (Tue 25th Aug)5.5ft (1.7m) 7s

Table - best surf conditions forecast for Road K over the next 16 days.


The Lowdown

Alright, let’s get into it. It’s Rusty here. We’re looking at a stretch for Road K, and I’ll be straight with you—right now, the surf is pretty grim. There’s a real quiet spell to start, but we do see some light at the end of the tunnel.

First up, the overall pattern: For the first several days, we’re scraping the bottom of the barrel. Tiny, weak swells, often with poor winds. It’s not until later in the second week that we start to see a pulse of energy and some actual size, but even then, the conditions are going to be a mixed bag. The water temp is about average for this time of year, nothing wild there.

Tuesday 18th August – Road K is exposed to a tiny SSE swell, only 3 ft, with a short period of 7 seconds. Energy is weak (75). Winds are light and offshore, so it’s clean, but honestly, these are very ordinary waves. If you’re a beginner and you’re desperate, you could get wet, but don’t expect much.

Wednesday 19th – Smaller again, 2 ft from the SE (61 energy). Morning has a light cross-off breeze keeping things clean, but the swell is just too small and weak to get excited about. Again, it’s surfable but barely.

Thursday 20th through Sunday 23rd – This is the real dead zone. Swells drop to 1 ft, energy is in the 20s and 30s, and the wind is lousy from cross to onshore for most of it. Truly poor conditions. If you’re a kiter, you might find something, but for a paddle surfer, it’s a solid no-go. That’s four days of nothing worth reporting.

Monday 24th – Finally, a bit of a pulse. The swell lifts to 4 ft from the south (133 energy), 7-second period. Morning winds are light cross-off and it’s clean. This is the first day that’s worth a look, but it’s still very ordinary. Not a standout.

Tuesday 25th – Similar story, 4 ft south swell (139 energy), glassy-offshore NNE breeze in the morning keeping it clean. Still just ‘surfable’ though. The energy is picking up, but the wave quality isn’t there yet.

Wednesday 26th through Friday 28th – This is where the size jumps, but the quality drops hard. A long-period SE groundswell arrives. On the 26th morning, we’ve got a tiny 2 ft SE swell with a huge 16-second period (162 energy), but strong onshore winds ruin it. Thursday 27th sees a bigger, longer swell (2 ft, 12 seconds, 219 energy) but again, fresh onshore winds from the south. Friday 28th is the biggest pulse we’ve seen: 5 ft from the south (314 energy), with a light cross-off. This is the one. The swell is solid, the morning wind is gentle and offshore, giving clean surf. But at 5 ft, it’s getting too big for beginners. The period is 7 seconds, so it’s a short-period windswell, not a clean groundswell. Still, for the experienced surfer, Friday 28th morning is the best on offer in the whole outlook. It’s not world-class, but it’s the standout.

Saturday 29th to Tuesday 1st September – The swell drops back and the winds turn messy again. The 31st morning sees another 5 ft pulse from the east (199 energy) with clean, light cross-off wind, but the period is a short 6 seconds. Not a standout. By the 1st of September, we’re looking at 4 ft from the SE (277 energy), but the wind is onshore and the condition is poor.

The pick of the period: Without a doubt, it’s the morning of Friday 28th August. That’s the closest we get to a proper session with a 5 ft south swell (314 energy), clean with light offshore cross-off wind. It’s the one day where the size and wind align for the experienced surfer. But the period is short, so don’t expect smooth lines. The long-range stuff (like the 26th) is promising on the charts but won’t be rideable in these winds.

Alright, that’s the picture. The early part is a write-off, but if you’re keen, pencil in Friday 28th morning. Keep an eye on the wind.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Wed afternoon, min 21°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 24mm), heaviest during Sat night. Warm (max 24°C on Thu night, min 21°C on Fri morning). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
SSE
6
0.8
SSE
7
0.9
SSE
7
0.6
SE
8
0.6
SE
7
0.6
SE
7
0.5
SE
9
0.4
ESE
8
0.4
SE
7
0.4
SE
7
0.4
SE
8
0.4
SE
8
1
E
5
0.9
E
5
1.1
E
5
1
E
6
0.9
ESE
5
0.6
S
5
0.9
S
7
Wave Graph
Metric surfscale
Energy kJ
70
65
78
37
33
29
39
28
13
13
25
24
53
38
69
71
49
19
69
Wind (km/h)
10
NNE
10
NNW
10
SSW
10
WSW
5
W
15
S
10
SW
10
WNW
15
SSW
0
N
10
ENE
10
E
10
ESE
25
E
25
E
25
ESE
15
SW
15
NW
5
SE
Wind State
cross-off
off
cross-on
cross
cross-off
cross-on
cross-on
cross-off
cross-on
glassy
cross
cross
cross-on
cross
cross-on
cross-on
cross
cross-off
on
High Tide
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
5:04PM0.97m
Low Tide
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
9:39AM0.28m
11:16PM0.29m
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
cloud
cloud
rain showers
rain showers
clear
clear
cloud
cloud
heavy rain
thunderstorm
thunderstorm
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:03
6:03
6:05
6:05
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:45
7:44
7:43
7:40
7:39
7:37
7:37
 mm
1
1
12
4
6
7
Temp °C
22
23
25
25
24
26
26
25
25
24
22
22
22
22
22
23
24
23
23
Feels °C
22
25
27
26
27
27
26
25
26
25
24
24
23
20
20
24
26
24
22
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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