Surf Forecasts:
H-Reef surf forecast from 17 Aug 2026:
- Best quality surf: Thursday 20 Aug, 8PM (local time) - 3.5ft (1.1m), 7s period, NE swell with glassy winds.
- Most powerful swell: Sunday 23 Aug, 11PM (local time) - 6ft (1.9m), 8s period, E swell with 512 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 8PM (local time) - 3.5ft (1.1m), 7s period with NE swell.
Best Forecast Surf Conditions for H-Reef this week:
The surf forecast for H-Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 8PM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.5m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at H-Reef in the next 16 days are 1.9m 8s and forecast to arrive on Sunday (Aug 23) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 14s period and expected on Monday (Aug 24) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 20th Aug) | 3.5ft (1.1m) 7s |
| Best Surf | 8PM (Thu 20th Aug) | 3.5ft (1.1m) 7s |
| Most Powerful | 11PM (Sun 23rd Aug) | 6ft (1.9m) 8s |
Table - best surf conditions forecast for H-Reef over the next 16 days.
The Lowdown
Alright, let’s break this down. Truth is, we’ve got a long, hard slog of flat, crappy conditions before anything worth paddling out for shows up.
We’re talking about H-Reef, a reef break that’s wide open to the swell. The first real chance of a wave doesn’t come until Tuesday, August 25th. From Monday the 17th all the way through Sunday the 24th, it’s just poor surf. The wind is blowing from the east and east-northeast, cross-shore or cross-onshore, and the swell is short and weak, around 7 to 8 seconds. It’s choppy, messy, and the combined energy is low, running from 88 up to 472 – not enough to get the heart rate up. You’re better off doing something else.
Then on Tuesday the 25th, the swell finally shows up at 2.1m from the east, but it’s still a short 8-second period. The energy climbs to 592 (moderate), but that east-northeast wind at 20 km/h is still cross-shore, so it’s not clean. It’s a marginal start, but it’s a start.
The real stand-out, the one you want to circle on the calendar, is Thursday, August 27th. A proper groundswell arrives. The morning brings 3.0m swell from the east with a very long 13-second period, and the combined energy hits 3221 (strong). The afternoon gets even bigger, 3.5m from the east at 12 seconds, energy at 3373. That’s serious, heavy water. The wind is still a cross-shore easterly at 20 km/h, so it’s not glassy, but for a reef break, that long-period groundswell will create deep, sucky, powerful waves. At 3.0m to 3.5m, this is strictly for experts. Beginners and intermediates, don’t even think about it. This is a big, mean ocean.
The 29th and 30th still have some size, but the energy fades, and then on the 31st we get another pulse of 2.5m from the east with an 11-second period, energy at 1843. Another good day, but the same cross-shore wind keeps it from being perfect.
The absolute best is that Thursday, the 27th of August. The biggest swell, the longest period, the most energy. For an experienced surfer looking for a serious, heavy reef break, that’s the one. Not perfect, but it’s the most powerful window of the whole 16 days.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Mon morning, min 24°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Fri afternoon. Warm (max 28°C on Sat morning, min 25°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | E 7 | ENE 7 | E 7 | ENE 7 | ENE 8 | E 8 | E 8 | ENE 8 | E 8 | E 7 | NE 7 | NE 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 285 | 220 | 150 | 220 | 202 | 200 | 161 | 197 | 124 | 88 | 67 | 79 | 73 | 127 | 200 | 291 | 323 | 470 | 505 | 465 | 488 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | glassy | cross | cross | cross-off | cross | cross | cross | cross | cross | cross |
High Tide | 4:38PM0.67m | 6:50AM0.65m | 4:30PM0.61m | 8:31AM0.64m | 11:00AM0.67m | 12:04PM0.73m | 12:39PM0.78m | 10:25PM0.40m | 1:07PM0.82m | 11:49PM0.44m | |||||||||||
Low Tide | 11:09AM0.43m | 11:35PM0.20m | 11:55AM0.52m | 00:05AM0.21m | 00:47AM0.23m | 2:05AM0.25m | 3:53AM0.24m | 9:00PM0.40m | 5:08AM0.20m | 8:20PM0.39m | |||||||||||
 | |  | | | | | | | |  |  | |  | | | | | | | | |
 | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:50 | — | — | 6:49 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 25 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 28 | 28 | 26 | 27 | 26 | 25 |
Feels °C | 27 | 27 | 26 | 27 | 26 | 26 | 28 | 27 | 27 | 29 | 30 | 31 | 30 | 29 | 27 | 28 | 27 | 27 | 28 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | N 8 | E 9 | NE 8 | NW 11 | WNW 13 | NNE 7 | NNE 6 | W 12 | E 8 | E 7 | NE 7 | NE 7 | NNE 6 | NNE 7 | NNE 6 | W 10 | W 10 | W 10 | WNW 14 | WNW 12 | WNW 12 |
| kJ | 5 | 6 | 69 | 4 | 17 | 5 | 22 | 11 | 124 | 88 | 67 | 79 | 28 | 29 | 15 | 7 | 8 | 8 | 18 | 61 | 54 |
Swell 2 Height (m) Direction Period (s) | W 11 | N 8 | W 10 | N 7 | W 10 | W 12 | W 12 | W 17 | NE 6 | NNE 6 | E 7 | E 8 | E 8 | W 10 | NE 7 | W 16 | W 16 | NW 16 | W 10 | N 7 | — |
| kJ | 2 | 1 | 2 | 1 | 2 | 12 | 11 | 5 | 40 | 36 | 53 | 36 | 36 | 2 | 12 | 5 | 5 | 10 | 8 | 1 | — |
Swell 3 Height (m) Direction Period (s) | SE 11 | NW 12 | N 7 | W 11 | W 18 | W 18 | W 17 | W 7 | W 11 | ESE 9 | ESE 9 | W 17 | W 17 | W 17 | W 10 | N 8 | N 8 | W 16 | W 16 | W 16 | S 20 |
| kJ | 5 | 6 | 1 | 2 | 6 | 6 | 6 | 1 | 2 | 8 | 8 | 5 | 23 | 5 | 8 | 1 | 1 | 5 | 5 | 5 | 7 |
Wind waves Height (m) Direction Period (s) | E 7 | ENE 7 | E 7 | ENE 7 | ENE 8 | E 8 | E 8 | ENE 8 | — | — | — | — | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 |
| kJ | 285 | 220 | 150 | 220 | 202 | 200 | 161 | 197 | — | — | — | — | 73 | 127 | 200 | 291 | 323 | 470 | 505 | 465 | 488 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 23 | 23 | 23 | 9 | 9 | 23 | 9 | 2 | 2 | 2 | 23 | 0 | 3 | 23 | 3 | 23 | 23 | 23 | 23 | 25 | 25 |
Best forecast wave conditions in Maui | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the H-Reef Surf forecast
The above surf forecast table for H-Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at H-Reef can be found by selecting the local surf guide option on the grey menu. Our H-Reef 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 (H-Reef) 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 H-Reef 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.
Are you planning a vacation in Maui? If you are looking for accommodation near H-Reef, camping, hotels and condos and appartments in Maui, consider staying in Kahului which is 8 km (5 miles) away. Other places in and around Maui where you can find information about places to rent, and car hire include Wailuku which is 15 km (9 miles) away, Kihei, Lanai - Lanai and Kaunakakai - Molokai.
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