Surf Forecasts:
Lahaina Breakwall/Harbour surf forecast from 18 Aug 2026:
- Best quality surf: Monday 17 Aug, 5PM (local time) - 1.5ft (0.4m), 14s period, SSW swell with offshore winds.
- Most powerful swell: Friday 21 Aug, 8AM (local time) - 1.5ft (0.5m), 17s period, SW swell with 138 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 5PM (local time) - 1.5ft (0.4m), 14s period with SSW swell.
Best Forecast Surf Conditions for Lahaina Breakwall/Harbour this week:
The surf forecast for Lahaina Breakwall/Harbour over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 5PM. The primary swell is predicted to be 0.4m and 14s period with a secondary swell of 0.2m and 11s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Lahaina Breakwall/Harbour in the next 16 days are 0.5m 17s and forecast to arrive on Friday (Aug 21) at 8AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Sunday (Aug 23) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Mon 17th Aug) | 1.5ft (0.4m) 14s |
| Best Surf | 5PM (Mon 17th Aug) | 1.5ft (0.4m) 14s |
| Most Powerful | 8AM (Fri 21st Aug) | 1.5ft (0.5m) 17s |
Table - best surf conditions forecast for Lahaina Breakwall/Harbour over the next 16 days.
The Lowdown
Howdy, Rusty here. Let’s break down what’s in store for the next couple weeks.
I’ll be upfront – we’ve got a massive quiet spell on our hands. For the next week and a half, it’s almost dead flat. Through Monday the 19th of August, the swell is tiny, barely reaching 2 feet. The wave energy is weak, mostly under 100, with a few afternoons just sneaking into the low hundreds. Even with clean offshore winds from the NE and ENE, you’re fighting for a ride. From now until around the 26th of August, that’s a solid 9-day stretch of nothing worth chasing.
Water temp is sitting around 81°F, which is pretty normal for this time of year, so at least it’s warm while you’re waiting.
The only real action, and the only time you should be excited, is the final weekend of August. Thursday the 28th of August things start to change. Swell builds from the SSW, hitting 4 feet in the morning, then 4 feet in the afternoon. Wave energy jumps to 370 and then 560 – moderate, but building strong. Winds stay offshore from the ENE and NE, so expect clean conditions.
But the standout, without a doubt, is Friday the 29th of August into Saturday the 30th. This is the best we’ll see. Swell pushes to 5 feet from the SW and WSW, with a period of 12 seconds – proper groundswell. Combined energy hits 777 and 784, that’s strong for this break. Winds are light and offshore from the ENE and NE, so it’s going to be glassy and clean at Lahaina Breakwall/Harbour (Maui). This spot is consistent, but it can get crowded sometimes, so expect company. The swell direction lines up almost perfectly with the optimum WSW, so the reef should fire. This is for intermediate surfers – a bit too big for beginners at 5 feet. Don’t sleep on it.
After that, it drops off fast. By Sunday the 30th of August, it’s back to 3 feet and looking poor, and that’s the end of the window.
Your only window: Friday 29th August morning through Saturday 30th August afternoon. That’s the one. Everything else is a flat, ordinary run.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Mon afternoon, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Fri afternoon, min 25°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 14 | SSW 13 | S 13 | SW 18 | S 13 | SW 16 | SW 16 | SW 16 | SW 18 | SW 17 | SW 16 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 68 | 59 | 30 | 49 | 31 | 41 | 68 | 41 | 79 | 77 | 95 | 100 | 93 | 124 | 90 | 88 | 86 | 80 | 63 | 59 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | off | off | off | off |
High Tide | 5:55PM0.52m | 8:06AM0.48m | 5:48PM0.46m | 10:06AM0.48m | 12:33PM0.52m | 1:26PM0.57m | 1:58PM0.61m | 11:45PM0.28m | 2:25PM0.65m | 1:00AM0.32m | ||||||||||
Low Tide | 00:31AM0.09m | 12:52PM0.34m | 1:00AM0.10m | 1:43AM0.11m | 3:06AM0.12m | 5:01AM0.11m | 9:34PM0.25m | 6:12AM0.08m | 9:05PM0.24m | |||||||||||
 |  |  | | | | |  | | | | | | | | | | | | | |
 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 25 |
Feels °C | 28 | 26 | 26 | 27 | 25 | 27 | 28 | 26 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 29 | 28 | 27 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 13 | S 13 | S 13 | S 13 | E 8 | SW 16 | SW 16 | E 7 | NE 7 | NNE 7 | NNE 7 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | WNW 12 | NW 11 | E 9 |
| kJ | 68 | 59 | 30 | 30 | 30 | 47 | 68 | 41 | 40 | 57 | 30 | 30 | 93 | 124 | 90 | 88 | 86 | 56 | 63 | 42 |
Swell 2 Height (m) Direction Period (s) | W 11 | W 11 | WSW 17 | SW 18 | WNW 12 | SW 16 | S 12 | W 11 | SW 18 | E 7 | ENE 7 | SW 17 | W 10 | W 10 | WNW 10 | WNW 10 | WNW 11 | SW 15 | SW 15 | NW 11 |
| kJ | 9 | 10 | 28 | 49 | 14 | 41 | 11 | 9 | 79 | 17 | 19 | 100 | 19 | 17 | 19 | 20 | 22 | 80 | 56 | 59 |
Swell 3 Height (m) Direction Period (s) | SW 5 | WSW 6 | W 11 | W 13 | WSW 18 | W 12 | W 12 | S 12 | S 11 | SW 17 | SW 16 | ENE 7 | E 8 | E 8 | WSW 10 | S 12 | NW 14 | SW 9 | SW 9 | SW 14 |
| kJ | 1 | 4 | 9 | 14 | 31 | 25 | 11 | 11 | 10 | 77 | 95 | 15 | 11 | 12 | 10 | 11 | 29 | 3 | 3 | 54 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 5 | ENE 8 | ENE 5 | ENE 5 | NE 6 | NE 8 | ENE 7 | NE 6 | — | — | NE 7 | NE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | NE 6 |
| kJ | 183 | 86 | 138 | 74 | 61 | 42 | 163 | 111 | 40 | — | — | 44 | 100 | 68 | 98 | 100 | 211 | 184 | 195 | 139 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Maui | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the Lahaina Breakwall/Harbour Surf forecast
The above surf forecast table for Lahaina Breakwall/Harbour provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Lahaina Breakwall/Harbour can be found by selecting the local surf guide option on the grey menu. Our Lahaina Breakwall/Harbour 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 (Lahaina Breakwall/Harbour) 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 Lahaina Breakwall/Harbour 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.
Lahaina Breakwall/Harbour 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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