Surf Forecasts:
Windmills surf forecast from 15 Aug 2026:
- Most powerful swell: Saturday 15 Aug, 5PM (local time) - 11ft (3.5m), 9s period, ENE swell with 1,723 kJ wave energy.
Best Forecast Surf Conditions for Windmills this week:
The most powerful waves expected at Windmills in the next 16 days are 3.5m 9s and forecast to arrive on Saturday (Aug 15) 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 3.5m 10s period and expected on Saturday (Aug 15) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Sat 15th Aug) | 11ft (3.5m) 9s |
Table - best surf conditions forecast for Windmills over the next 16 days.
The Lowdown
Hey, Rusty here. Let's break down what's happening.
It's a grim start at Windmills this reef. The water temp is about 80°F, which is dead on for this time of year. No complaints there.
The first week is a total loss. Saturday the 15th has some serious size – 10ft of short-period junk from the ENE – but it's being hammered by a near-gale crosswind over 34 mph. Just a nasty, blown-out mess. Sunday drops to 6ft, but the wind is still a problem. We're looking at a solid chunk of time with nothing but moderate breezes and lumpy, cross-shore slop right through to the 26th.
Okay, the long-range stuff is where it gets spicy. On Thursday, the 27th of August, the period jumps to a massive 17 seconds. That's real groundswell energy, with a combined swell energy of 759. The problem is that fresh 30 mph crosswind is still there, making for a bumpy ride.
The real gem is the final weekend. The 30th of August sees that perfect 13-second period kick in with 7ft to nearly 7ft of swell. The combined energy hits 1531 on Sunday afternoon – that's a ton of water moving. The wind eases to a moderate 20 mph cross breeze. For a reef break like Windmills, that long-period groundswell will draw some beautiful lines. At over 6ft, it's big and powerful, so leave your foamie at home. The crowd rating is "often," so there will be a handful of guns out there.
Final call: The first ten days are a hard pass. If you're a seasoned charger, circle the 30th of August. It's a long way off, so keep an eye on it, but the potential for some of the best waves of the month is there.
- Rusty
Short Range ForecastHeavy rain (total 27mm), heaviest during Sat night. Warm (max 26°C on Sat morning, min 24°C on Sat night). Winds decreasing (gales from the ENE on Sat night, moderate winds from the ENE by Mon night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Thu afternoon, min 24°C on Tue night). 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) | ENE 8 | ENE 9 | ENE 10 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 6 | ENE 5 | ENE 5 | ENE 5 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 5 | NE 7 | NNE 7 | NE 7 | NE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1299 | 1723 | 940 | 439 | 344 | 263 | 214 | 127 | 90 | 64 | 81 | 122 | 136 | 138 | 131 | 108 | 68 | 67 | 42 | 102 | 82 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross | cross | cross-off | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off |
High Tide | 4:32PM0.73m | 5:21AM0.61m | 4:48PM0.65m | 6:15AM0.61m | 4:55PM0.58m | 7:23AM0.60m | 4:40PM0.53m | 9:04AM0.61m | 11:01AM0.64m | 12:06PM0.68m | |||||||||||
Low Tide | 10:13AM0.23m | 11:07PM0.17m | 10:55AM0.32m | 11:30PM0.17m | 11:41AM0.40m | 11:55PM0.17m | 12:48PM0.48m | 00:24AM0.18m | 1:05AM0.20m | 2:20AM0.21m | 4:03AM0.21m | ||||||||||
 | |  | | |  |  | | |  | | | | |  | | | | | | | |
 | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — |
 | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — |
mm | 4 | 1 | 14 | 6 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 21 | 21 | 19 | 24 | 27 | 25 | 26 | 25 | 24 | 24 | 24 | 24 | 26 | 26 | 25 | 26 | 27 | 27 | 28 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | S 13 | SSW 13 | S 14 | ENE 8 | ENE 8 | S 15 | S 14 | SSW 14 | SSW 13 | S 13 | S 13 | S 13 | SW 16 | SW 16 | SW 16 | SW 18 | SW 17 | SW 16 | NNE 7 | SW 16 | NE 7 |
| kJ | 90 | 59 | 101 | 439 | 344 | 110 | 107 | 68 | 59 | 30 | 30 | 30 | 41 | 68 | 41 | 79 | 77 | 95 | 42 | 93 | 82 |
Swell 2 Height (m) Direction Period (s) | NNW 8 | W 11 | W 13 | S 8 | S 7 | SSW 6 | SSW 6 | W 11 | W 11 | WSW 17 | WSW 18 | WNW 12 | W 12 | W 12 | W 11 | W 11 | SSW 8 | E 9 | ENE 8 | E 8 | SW 16 |
| kJ | 7 | 10 | 13 | 60 | 39 | 15 | 3 | 9 | 10 | 28 | 30 | 14 | 25 | 11 | 9 | 9 | 6 | 24 | 33 | 12 | 124 |
Swell 3 Height (m) Direction Period (s) | W 11 | W 11 | NNW 9 | S 13 | SSW 13 | WNW 11 | W 11 | SW 5 | SW 19 | W 13 | W 13 | WSW 18 | S 12 | S 12 | S 12 | SW 8 | W 11 | SW 8 | SW 17 | SW 9 | E 8 |
| kJ | 9 | 10 | 7 | 55 | 56 | 12 | 10 | 1 | 15 | 13 | 14 | 31 | 11 | 11 | 11 | 3 | 9 | 2 | 100 | 3 | 12 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 9 | ENE 10 | E 8 | ENE 8 | ENE 8 | ENE 7 | ENE 6 | ENE 5 | ENE 5 | ENE 5 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 5 | NE 7 | — | NE 7 | — |
| kJ | 1299 | 1723 | 940 | 736 | 497 | 263 | 214 | 127 | 90 | 64 | 81 | 122 | 136 | 138 | 131 | 108 | 68 | 67 | — | 102 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 38 | 163 | 150 | 115 | 15 | 17 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 2 | 11 | 15 | 2 | 2 | 0 | 9 |
Best forecast wave conditions in Maui | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Windmills Surf forecast
The above surf forecast table for Windmills provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Windmills can be found by selecting the local surf guide option on the grey menu. Our Windmills 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 (Windmills) 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 Windmills 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.
Windmills is 20 km (12 miles) from Wailuku. If you plan a vacation in Maui, look for hotels and other accommodation in Wailuku. Wailuku has rooms for a wide range of budgets as well as car hire and transport links.
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