Surf Forecasts:
Flies surf forecast from 11 Aug 2026:
- Best quality surf: Monday 17 Aug, 2PM (local time) - 6ft (1.8m), 7s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 17 Aug, 5PM (local time) - 6ft (1.9m), 7s period, SSW swell with 326 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 2PM (local time) - 6ft (1.8m), 7s period with SSW swell.
Best Forecast Surf Conditions for Flies this week:
The surf forecast for Flies 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 1.8m and 7s period with a secondary swell of 0.1m and 11s. Another secondary swell of 0.1m and 19s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Flies in the next 16 days are 1.9m 7s and forecast to arrive on Monday (Aug 17) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Tuesday (Aug 11) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Mon 17th Aug) | 6ft (1.8m) 7s |
| Best Surf | 2PM (Mon 17th Aug) | 6ft (1.8m) 7s |
| Most Powerful | 5PM (Mon 17th Aug) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Flies over the next 16 days.
The Lowdown
Alright, I’m lookin’ at the next 16 days and to be honest, it’s a pretty tough stretch for surf around here. The first week is a write-off – tiny, weak, and messy. We’re not talkin’ about a few days of flatness; it’s a solid 7-day gap from the start of the period until we finally see something worth paddlin’ out for.
The first real flicker of hope comes on Monday 17th August afternoon. The swell starts to push up, but it’s not pretty. We’ve got a 6.2-ft swell from the SSW, but the period is a short, jumbled 7 seconds – that’s gonna be a lumpy, gutless wall of whitewash. The wind is a cross-off, keepin’ the surface clean, but the energy is just weak (343). It’s a “marginal” call at best. This is strictly for the keen and the desperate.
Tuesday 18th August afternoon is where it finally gets genuinely interesting. The wind swings offshore from the NW, gettin’ that face glassy clean. We’ve got a 2-ft swell, but it’s a long-period groundswell from the SE at 13 seconds. That’s real energy (236) for the size. The wave is gonna have shape and push. This is a standout window for the patient surfer.
The next morning, Wednesday 19th August, holds a bit of that clean energy too, with a 2.6-ft SE swell and 11-second period (195), but the wind is a cross-off from the north, still clean. It’s good, but not as good as the Tuesday afternoon window.
The pattern fades out pretty quickly after that. The Thursday 20th gets a bit of a cross-shore chop on it, and by Friday 21st the wind is messy again. The second week of the forecast is basically a non-event, with nothing but tiny, onshore slop ‘til the period ends.
So, the best on offer is clearly Tuesday afternoon, August 18th at Flies. The offshore NW wind is a major positive, keepin’ it clean, and that 2-ft, 13-second SE groundswell is a longer period wave that’ll wrap in with some surprising punch. The water here is a touch warmer than normal for this time of year at 75.2°F, which is a nice bonus.
The other little window is Wednesday morning, August 19th, which is also clean and surfable, just a touch smaller and less powerful.
Overall, it’s a long wait for a short, sweet moment. The rest is a write-off.
Short Range ForecastHeavy rain (total 27mm), heaviest during Tue night. Warm (max 27°C on Mon afternoon, min 22°C on Tue night). Winds decreasing (strong winds from the WNW on Mon night, calm by Tue night). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Thu afternoon. Warm (max 26°C on Fri afternoon, min 19°C on Fri night). Winds decreasing (fresh winds from the NW on Fri morning, light winds from the W by Sun morning). | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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) | SSW 5 | S 6 | S 6 | SSW 6 | S 6 | S 6 | S 5 | SSW 4 | SSW 5 | S 5 | SSE 6 | S 5 | S 5 | S 7 | S 7 | S 7 | S 7 | S 7 | S 7 | SSW 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 8 | 25 | 23 | 25 | 23 | 15 | 15 | 13 | 20 | 25 | 27 | 19 | 9 | 21 | 21 | 38 | 37 | 23 | 34 | 141 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross-on | glassy | cross-off | cross-on | cross-off | cross-off | cross-on | cross-off | off | off | cross-off | cross-off | off | cross-off | cross-off | cross | cross |
High Tide | 6:21PM1.20m | 6:51AM0.99m | 7:14PM1.23m | 7:43AM1.05m | 8:05PM1.24m | 8:32AM1.10m | 8:53PM1.22m | 9:20AM1.12m | 9:40PM1.18m | 10:07AM1.12m | 10:26PM1.12m | 10:53AM1.11m | 11:12PM1.04m | |||||||
Low Tide | 00:34AM0.06m | 12:27PM0.04m | 1:27AM0.01m | 1:25PM0.01m | 2:12AM-0.02m | 2:16PM-0.01m | 2:53AM-0.03m | 3:03PM0.00m | 3:31AM-0.02m | 3:47PM0.03m | 4:08AM0.02m | 4:30PM0.08m | 4:45AM0.06m | |||||||
 |  | |  | | | |  |  |  |  | | |  | | | | | | | |
 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — |
 | 7:54 | — | — | 7:53 | — | — | 7:52 | — | — | 7:51 | — | — | 7:50 | — | — | 7:47 | — | — | 7:46 | — |
mm | — | 2 | — | — | 19 | — | — | — | 6 | 2 | 1 | — | — | — | — | — | — | — | — | 3 |
Temp °C | 27 | 25 | 25 | 27 | 22 | 24 | 26 | 25 | 24 | 24 | 25 | 22 | 26 | 24 | 21 | 24 | 24 | 21 | 23 | 24 |
Feels °C | 27 | 21 | 27 | 28 | 21 | 24 | 25 | 23 | 25 | 24 | 26 | 15 | 22 | 19 | 17 | 20 | 19 | 21 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | SSE 6 | S 6 | S 6 | ESE 9 | S 6 | S 6 | S 5 | ESE 8 | SSW 5 | SE 3 | SSE 6 | S 5 | S 5 | S 7 | S 7 | S 7 | S 7 | S 7 | SE 9 | SSE 8 |
| kJ | 4 | 25 | 23 | 8 | 23 | 15 | 15 | 7 | 20 | 3 | 27 | 19 | 9 | 21 | 21 | 38 | 37 | 23 | 3 | 7 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 9 | — | SE 9 | SE 8 | ENE 4 | SE 14 | SE 8 | SE 10 | SE 10 | SE 10 | SSE 7 | ESE 9 | — | NNW 3 | SE 9 | SE 9 | SE 9 | — |
| kJ | 4 | 4 | 3 | — | 3 | 3 | 2 | 8 | 3 | 4 | 4 | 4 | 4 | 8 | — | 1 | 3 | 3 | 12 | — |
Swell 3 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 12 | S 15 | ESE 8 | SE 11 | SE 11 | SE 8 | SE 13 | SE 13 | ESE 9 | — | SE 9 | SE 9 | E 12 | — | — | — |
| kJ | 1 | 1 | 1 | 1 | 3 | 4 | 7 | 5 | 4 | 3 | 7 | 7 | 8 | — | 3 | 3 | 3 | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 5 | WSW 4 | W 4 | SSW 6 | — | NE 3 | — | SSW 4 | — | S 5 | SSW 5 | NW 3 | W 4 | N 3 | NNW 2 | WNW 3 | — | — | S 7 | SSW 6 |
| kJ | 8 | 14 | 2 | 25 | — | 4 | — | 13 | — | 25 | 19 | 5 | 1 | 2 | 1 | 1 | — | — | 34 | 141 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 344 | 360 | 32 | 2551 | 638 | 778 | 3322 | 45 | 850 | 2547 | 21 | 685 | 3381 | 779 | 715 | 715 | 4 | 725 | 1022 | 310 |
Best forecast wave conditions in Long Island New York | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Flies Surf forecast
The above surf forecast table for Flies provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Flies can be found by selecting the local surf guide option on the grey menu. Our Flies 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 (Flies) 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 Flies 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.
Flies is 32 km (20 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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